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Biomaterial‑based mechanical regulation facilitates scarless wound healing with functional skin appendage regeneration 被引量:1
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作者 Ying-Ying Li Shuai-Fei Ji +2 位作者 Xiao-Bing Fu Yu-Feng Jiang Xiao-Yan Sun 《Military Medical Research》 2025年第1期96-120,共25页
Scar formation resulting from burns or severe trauma can significantly compromise the structural integrity of skin and lead to permanent loss of skin appendages,ultimately impairing its normal physiological function.A... Scar formation resulting from burns or severe trauma can significantly compromise the structural integrity of skin and lead to permanent loss of skin appendages,ultimately impairing its normal physiological function.Accumulating evidence underscores the potential of targeted modulation of mechanical cues to enhance skin regeneration,promoting scarless repair by influencing the extracellular microenvironment and driving the phenotypic transitions.The field of skin repair and skin appendage regeneration has witnessed remarkable advancements in the utilization of biomaterials with distinct physical properties.However,a comprehensive understanding of the underlying mechanisms remains somewhat elusive,limiting the broader application of these innovations.In this review,we present two promising biomaterial-based mechanical approaches aimed at bolstering the regenerative capacity of compromised skin.The first approach involves leveraging biomaterials with specific biophysical properties to create an optimal scarless environment that supports cellular activities essential for regeneration.The second approach centers on harnessing mechanical forces exerted by biomaterials to enhance cellular plasticity,facilitating efficient cellular reprogramming and,consequently,promoting the regeneration of skin appendages.In summary,the manipulation of mechanical cues using biomaterial-based strategies holds significant promise as a supplementary approach for achieving scarless wound healing,coupled with the restoration of multiple skin appendage functions. 展开更多
关键词 SCARLESS Wound healing Biomaterials mechanical cues Skin appendages
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Innovative dispersion techniques of graphene nanoplatelets(GNPs)through mechanical stirring and ultrasonication:Impact on morphological,mechanical,and thermal properties of epoxy nanocomposites
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作者 Vasi Uddin Siddiqui S.M.Sapuan Mohd Roshdi Hassan 《Defence Technology(防务技术)》 2025年第1期13-25,共13页
Graphene nanoplatelets(GNPs)have attracted tremendous interest due to their unique properties and bonding capabilities.This study focuses on the effect of GNP dispersion on the mechanical,thermal,and morphological beh... Graphene nanoplatelets(GNPs)have attracted tremendous interest due to their unique properties and bonding capabilities.This study focuses on the effect of GNP dispersion on the mechanical,thermal,and morphological behavior of GNP/epoxy nanocomposites.This study aims to understand how the dispersion of GNPs affects the properties of epoxy nanocomposite and to identify the best dispersion approach for improving mechanical performance.A solvent mixing technique that includes mechanical stirring and ultrasonication was used for producing the nanocomposites.Fourier transform infrared spectroscopy was used to investigate the interaction between GNPs and the epoxy matrix.The measurements of density and moisture content were used to confirm that GNPs were successfully incorporated into the nanocomposite.The findings showed that GNPs are successfully dispersed in the epoxy matrix by combining mechanical stirring and ultrasonication in a single step,producing well-dispersed nanocomposites with improved mechanical properties.Particularly,the nanocomposites at a low GNP loading of 0.1 wt%,demonstrate superior mechanical strength,as shown by increased tensile properties,including improved Young's modulus(1.86 GPa),strength(57.31 MPa),and elongation at break(4.98).The nanocomposite with 0.25 wt%GNP loading performs better,according to the viscoelastic analysis and flexural properties(113.18 MPa).Except for the nanocomposite with a 0.5 wt%GNP loading,which has a higher thermal breakdown temperature,the thermal characteristics do not significantly alter.The effective dispersion of GNPs in the epoxy matrix and low agglomeration is confirmed by the morphological characterization.The findings help with filler selection and identifying the best dispersion approach,which improves mechanical performance.The effective integration of GNPs and their interaction with the epoxy matrix provides the doorway for additional investigation and the development of sophisticated nanocomposites.In fields like aerospace,automotive,and electronics where higher mechanical performance and functionality are required,GNPs'improved mechanical properties and successful dispersion present exciting potential. 展开更多
关键词 Graphene nanoplatelets Epoxy Nanocomposites mechanical properties Thermal properties mechanical stirrer Sonication
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Chemical genetic approaches to dissect microbiota mechanisms in health and disease
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作者 Xinglin Yang 《四川生理科学杂志》 2025年第1期162-162,共1页
Advances in genomics,proteomics,and metabolomics have revealed associations between specific microbiota species in health and disease.However,the precise mechanism(s)of action for many microbiota species and molecules... Advances in genomics,proteomics,and metabolomics have revealed associations between specific microbiota species in health and disease.However,the precise mechanism(s)of action for many microbiota species and molecules have not been fully elucidated,limiting the development of microbiota-based diagnostics and therapeutics.In this Review,we highlight innovative chemical and genetic approaches that are enabling the dissection of microbiota mechanisms and providing causation in health and disease.Although specific microbiota molecules and mechanisms have begun to emerge,new approaches are still needed to go beyond phenotypic associations and translate microbiota discoveries into actionable targets and therapeutic leads to prevent and treat diseases. 展开更多
关键词 mechanISMS TRANSLATE PRECISE
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Metabolic mechanism of dietary factors and effect of dietary types associated with hyperuricemia:a review
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作者 Kaina Qiao Xuewei Zhou +3 位作者 Lili Zhang Wangang Zhang Baoguo Sun Yuyu Zhang 《Food Science and Human Wellness》 2025年第3期835-849,共15页
Globally,hyperuricemia is a growing health,social,and economic problem which could cause gout,chronic kidney diseases and other diseases.There are increasing evidences that a sensible diet makes sense to reduce the ri... Globally,hyperuricemia is a growing health,social,and economic problem which could cause gout,chronic kidney diseases and other diseases.There are increasing evidences that a sensible diet makes sense to reduce the risk of hyperuricemia.This review aims to explore the metabolic mechanism of dietary factors and effects of dietary types associated with hyperuricemia.Recommendations for dietary modification to prevent hyperuricemia are as following:decreasing intake of animal organs,seafood,sugar-sweetened,and alcohol beverages is essential;choosing water or unsweetened tea and coffee instead of sweetened beverages is beneficial;and increasing intake of vegetables,reduced-fat dairy products,foods containing fiber,micronutrients and unsaturated fatty acids is helpful.In addition,consumption of fruits and legumes in moderation is advantageous,and low-fructose of fruits and low-purine of non-soy beans are recommended.Moreover,personalized diet needs to be emphasized for hyperuricemic patients accompanied with diverse metabolic diseases. 展开更多
关键词 PURINE Metabolic mechanism Dietary types HYPERURICEMIA Personalized diet
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Discovery and mechanism of anti-hypertensive effect of a novel tripeptide(SYP)from medicinal fungus Ganoderma lingzhi
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作者 Qiang Wu Feijun Luo +4 位作者 Jia Huang Ping Huang Yongnan Liu Xiaoling Wang Gaoqiang Liu 《Food Science and Human Wellness》 2025年第2期509-524,共16页
Ganoderma lingzhi is a new species of the prize medicinal mushroom Ganoderma(Agaricomycetes).Using angiotensin I-converting enzyme(ACE)as a target,a tripeptide Ser-Tyr-Pro(SYP)was discovered with preponderant ACE inhi... Ganoderma lingzhi is a new species of the prize medicinal mushroom Ganoderma(Agaricomycetes).Using angiotensin I-converting enzyme(ACE)as a target,a tripeptide Ser-Tyr-Pro(SYP)was discovered with preponderant ACE inhibitory activity with an 50%inhibiting concentration(IC_(50))value of 62.50μg/mL attribute to the formed salt bridge and hydrogen bonds between SYP and ACE.SYP even maintained superior bioactivity after intestinal digestion,and exerted no cytotoxicity,but presented incomplete bioavailability in blood of spontaneous hypertensive rats(SHRs).Furthermore,it performed antihypertensive effect in vivo by inhibiting the influx of Ca^(2+)through activating endothelial NO synthase(e NOS)/NO/guanosine 3',5'-cyclic monophosphate(c GMP)pathway,accompanied by attenuating angiotensin II(Ang II)/NADPH oxidase(NOX)/reactive oxygen species(ROS)pathway.This work not only discoverers a novel pharmacological ingredient from medicinal mushroom G.lingzhi for hypertension therapy,but also provides an insight into molecular mechanism of the ACE inhibitory peptide(ACEIP)on lowering blood pressure. 展开更多
关键词 Antihypertensive peptide Ganoderma lingzhi Gene microarray Molecular mechanism
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Understanding the mechanism underlying the anti-inflammatory effect of dietary flavonoids on IBD:a focus on gut microbiota and its metabolites involved in SCFA,bile acid,tryptophan and lipopolysaccharides
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作者 Huihui Xiong Hui Chen +3 位作者 Lingli Chen Kehui Ouyang Suyun Lin Wenjun Wang 《Food Science and Human Wellness》 2025年第2期385-403,共19页
Inflammatory bowel disease(IBD)is a chronic gastrointestinal disease with a high incidence.Treatment for IBD includes medications and diet,and common anti-inflammatory medications have limitations like drug resistance... Inflammatory bowel disease(IBD)is a chronic gastrointestinal disease with a high incidence.Treatment for IBD includes medications and diet,and common anti-inflammatory medications have limitations like drug resistance and serious adverse effects.Accumulating evidence has demonstrated that dietary flavonoids exhibit an alleviative effect on IBD by influencing gut microbiota.The microbiota-derived metabolites also regulate IBD and maintain intestinal homeostasis.In this review,we investigate the therapeutic effect of gut microbiota and metabolites on IBD by intestinal immune and intestinal barrier function.We demonstrate the underlying mechanism of dietary flavonoids as an anti-inflammatory molecule alleviating IBD by regulating gut microbiota,short chain fatty acid(SCFA),bile acid(BA),tryptophan(Trp)metabolism and lipopolysaccharides(LPS)-toll-like receptor 4(TLR4)signaling pathway.Based on structural differences of flavonoids,we summarize the recent research progress on the role of different dietary flavonoids in alleviating IBD by gut microbiota and metabolites in animal and clinical trials.This review indicates that dietary flavonoids targeting gut microbiota and metabolites provide a promising strategy for the treatment of inflammation and novel insights into the management of IBD. 展开更多
关键词 Dietary flavonoids Inflammatory bowel disease Gut microbiota METABOLITES mechanisms
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Enhanced mechanical squeezing in an optomechanical system via backward stimulated Brillouin scattering
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作者 Shan-Shan Chen Yi-Long Xie +4 位作者 Jing-Jing Zhang Na-Na Zhang Yong-Rui Guo Huan Yang Yong Ma 《Chinese Physics B》 2025年第1期315-322,共8页
We investigate theoretically the enhancement of mechanical squeezing in a multimode optomechanical system by introducing a coherent phonon–photon interaction via the backward stimulated Brillouin scattering(BSBS)proc... We investigate theoretically the enhancement of mechanical squeezing in a multimode optomechanical system by introducing a coherent phonon–photon interaction via the backward stimulated Brillouin scattering(BSBS)process.The coherent photon–phonon interaction where two optical modes couple to a Brillouin acoustic mode with a large decay rate provides an extra channel for the cooling of a Duffing mechanical oscillator.The squeezing degree and the robustness to the thermal noises of the Duffing mechanical mode can be enhanced greatly.When the Duffing nonlinearity is weak,the squeezing degree of the mechanical mode in the presence of BSBS can be improved by more than one order of magnitude compared with that in the absence of BSBS.Our scheme may be extended to other quantum systems to study novel quantum effects. 展开更多
关键词 mechanical squeezing optomechanical system backward stimulated Brillouin scattering Duffing nonlinearity
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Ballistic response mechanism and resistance-driven evaluation method of UHMWPE composite
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作者 Yemao He Johnny Qing Zhou +3 位作者 Yanan Jiao Hongshuai Lei Zeang Zhao Daining Fang 《Defence Technology(防务技术)》 2025年第2期1-16,共16页
The use of ultra-high molecular weight polyethylene(UHMWPE)composite in the design of lightweight protective equipment,has gained a lot of interest.However,there is an urgent need to understand the ballistic response ... The use of ultra-high molecular weight polyethylene(UHMWPE)composite in the design of lightweight protective equipment,has gained a lot of interest.However,there is an urgent need to understand the ballistic response mechanism and theoretical prediction model of performance.This paper explores the ballistic response mechanism of UHMWPE composite through experimental and simulation analyses.Then,a resistance-driven modeling method was proposed to establish a theoretical model for predicting the bulletproof performance.The ballistic response mechanism of UHMWPE composite encompassed three fundamental modes:local response,structural response,and coupled response.The occurrence ratio of these fundamental response modes during impact was dependent on the projectile velocity and laminate thickness.The bulletproof performance of laminate under different response modes was assessed based on the penetration depth of the projectile,the bulging height on the rear face of the laminate,the thickness of remaining sub-laminate,and residual velocity of the projectile.The absolute deviations of bulletproof performance indicator between theoretical value and experimental value were well within 11.13%,demonstrating that the established evaluation model possessed high degree of prediction accuracy. 展开更多
关键词 UHMWPE composite Ballistic response mechanism Theoretical model Performance evaluation
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Propagation criterion of hydraulic fracture in rock based on the rock micro-cracking mechanism
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作者 Qingwang Cai Bingxiang Huang +1 位作者 Xinglong Zhao Yuekun Xing 《International Journal of Mining Science and Technology》 2025年第3期433-449,共17页
Hydraulic fracture(HF)formed in rock significantly helps with the development of geo-energy and georesources.The HF formation condition was challenging to understand,with obscure rock micro-cracking mechanisms being a... Hydraulic fracture(HF)formed in rock significantly helps with the development of geo-energy and georesources.The HF formation condition was challenging to understand,with obscure rock micro-cracking mechanisms being a key factor.The rock micro-cracking mechanism under gradient pore water pressure was analyzed on the scale of mineral particles and it was combined with macroscopic boundary conditions of rock hydraulic fracturing,obtaining the propagation criterion of HF in rock based on the rock micro-cracking mechanism which was verified by experiment.The results show that the disturbed skeleton stress induced by the disturbance of gradient pore water pressure in rock equals the pore water pressure difference.The overall range of the defined mechanical shape factor a/b is around 1,but greater than0.5.Under the combined influence of pore water pressure differences and macroscopic boundary stresses on the rock micro-cracking,micro-cracks form among rock mineral particles,micro-cracks connect to form micro-hydraulic fracture surfaces,and micro-hydraulic fracture surfaces open to form macrohydraulic fractures.HF begins to form at the micro-cracking initiation pressure(MCIP),which was tested by keeping the HF tip near the initiation point.The theoretical value of MCIP calculated by the proposed propagation criterion is close to MCIP tested. 展开更多
关键词 Hydraulic fracture Propagation criterion Micro-cracking mechanism Pore pressure Stress singularity
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Advanced Bismuth-Based Anode Materials for Efficient Potassium Storage:Structural Features,Storage Mechanisms and Modification Strategies
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作者 Yiye Tan Fanglan Mo Hongyan Li 《Nano-Micro Letters》 2025年第6期1-39,共39页
Potassium-ion batteries(PIBs)are considered as a promising energy storage system owing to its abundant potassium resources.As an important part of the battery composition,anode materials play a vital role in the futur... Potassium-ion batteries(PIBs)are considered as a promising energy storage system owing to its abundant potassium resources.As an important part of the battery composition,anode materials play a vital role in the future development of PIBs.Bismuth-based anode materials demonstrate great potential for storing potassium ions(K^(+))due to their layered structure,high theoretical capacity based on the alloying reaction mechanism,and safe operating voltage.However,the large radius of K^(+)inevitably induces severe volume expansion in depotassiation/potassiation,and the sluggish kinetics of K^(+)insertion/extraction limits its further development.Herein,we summarize the strategies used to improve the potassium storage properties of various types of materials and introduce recent advances in the design and fabrication of favorable structural features of bismuth-based materials.Firstly,this review analyzes the structure,working mechanism and advantages and disadvantages of various types of materials for potassium storage.Then,based on this,the manuscript focuses on summarizing modification strategies including structural and morphological design,compositing with other materials,and electrolyte optimization,and elucidating the advantages of various modifications in enhancing the potassium storage performance.Finally,we outline the current challenges of bismuth-based materials in PIBs and put forward some prospects to be verified. 展开更多
关键词 Bismuth-based materials Potassium-ion batteries ANODE Potassium storage mechanism Modification strategies
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Formation mechanism of platinum nanoparticles prepared by atmospheric pressure plasma jet
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作者 Ying ZHAO Ali TAO +4 位作者 Zijing CHEN Yue RUAN Kunpeng WANG Ling ZHU Longwei CHEN 《Plasma Science and Technology》 2025年第3期104-110,共7页
An atmospheric pressure plasma jet(APPJ)approach is developed to prepare platinum nanoparticles(PtNPs)under mild reaction conditions of lower temperatures and without adding chemical reagents.Optical Emission Spectros... An atmospheric pressure plasma jet(APPJ)approach is developed to prepare platinum nanoparticles(PtNPs)under mild reaction conditions of lower temperatures and without adding chemical reagents.Optical Emission Spectroscopy(OES)and X-ray Photoelectron Spectroscopy(XPS)tests revealed that the APPJ contains a large number of high-energy active particles,which can generate solvated electrons in liquid thereby promoting the rapid reduction of Pt(Ⅳ)ions into Pt(0)atoms,and these atoms gradually grow into nanoparticles.After 3 min of treatment,PtNPs exhibit excellent dispersibility with a particle size distribution ranging from 1.8 to 2.8 nm.After 5 min,the particle size increases,and aggregation occurs.The zeta potentials for the two situations were-56.0 mV and-12.5 mV respectively.The results indicate that the treatment time has a significant impact on the dispersion,particle size distribution,and sol stability of the nanoparticles.Furthermore,it reveals the formation mechanism of PtNPs prepared by APPJ,which involves the generation and expansion of nanocrystalline nuclei,and the construction of negatively charged colloidal particles.The overall mechanism highlights the importance of the plasma-liquid interaction in the synthesis of PtNPs,offering a new perspective on the controllable production of nanomaterials using plasma technology. 展开更多
关键词 atmospheric pressure plasma jet platinum nanoparticles liquid-phase reduction formation mechanism
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Unraveling post-growth mechanisms of monolayer CsPbBr3 nanocubes:Laser-enhanced transformations and cathodoluminescence-electron microscopy correlations
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作者 Mingxing Li Xiaoge Wang +5 位作者 Xiaofan Cao Zhiqun He Chunjun Liang Mingxing Chen Jing Ju Fangtian You 《Journal of Energy Chemistry》 2025年第1期146-156,共11页
Lead-halide perovskite nanoparticles(LHP NPs) are highly promising materials for next-generation displays and solid-state lighting due to their exceptional optical properties. However, their inherent instability prese... Lead-halide perovskite nanoparticles(LHP NPs) are highly promising materials for next-generation displays and solid-state lighting due to their exceptional optical properties. However, their inherent instability presents a significant challenge. Recent advances have demonstrated that optoelectronic devices based on monolayer nanoparticle films exhibit both high luminescence efficiency and long-term stability.Our research demonstrates that mobility limitations and anisotropic alignments in CsPbBr3nanocube monolayer films are key to their stabilization, hindering spontaneous growth through face-to-face fusion and resulting in the formation of connecting necks in a diagonal direction. Introducing laser irradiation confirmed this by significantly accelerating nanocubes growth, increasing mobility, and enhancing local structural ordering, leading to larger and more regularly shaped nanosheets. Fourier transform infrared spectroscopy and energy dispersive spectroscopy line-scan analyses indicated that laser irradiation did not disrupt the ligand structure. Transmission electron microscopy and correlative cathodoluminescence electron microscopy revealed the effects of post-growth and heterogeneous structures, including enhanced luminescence and inhomogeneous intensity in the nanosheets. These findings deepen the understanding of the post-growth mechanism of monolayer nanoparticles and the structure-emission correlation and highlight the unique role of laser irradiation in directing the formation of well-defined and regular nanostructures. 展开更多
关键词 CsPbBr3 nanocubes Post-growth mechanism Heterogeneous structure Single-particle spectroscopy Laser irradiation
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Microstructure and mechanical properties of welds of AZ31B magnesium alloy produced by different gas tungsten arc welding variants
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作者 S.Srinivasan R.Ravi Bharath +1 位作者 A.Atrens P.Bala Srinivasan 《Defence Technology(防务技术)》 2025年第2期98-110,共13页
This work aimed to(i)understand conventional and pulse gas tungsten arc welding(GTAW)of AZ31B,and(ii)explore high frequency welding(100 Hz-1500 Hz).GTA welding with alternating current(AC)and direct current electrode ... This work aimed to(i)understand conventional and pulse gas tungsten arc welding(GTAW)of AZ31B,and(ii)explore high frequency welding(100 Hz-1500 Hz).GTA welding with alternating current(AC)and direct current electrode positive(DCEP)polarities yielded crack-free partial penetration welds for6 mm thick AZ31B alloy sheet.Welding under direct current electrode negative(DCEN)polarity with identical parameters as that for AC and DCEP resulted in full penetration welds that had microcracks.Defect-free full-penetration welds could be accomplished with pulse GTA welding using DCEN polarity at a pulse frequency of 1 Hz with a pulse duration ratio of 1:1.The resultant DCEN P 1:1 weld metal had a microstructure finer than the conventional DCEN weld.Welds produced with pulse duration ratios of 1:2and 1:4 lacked penetration but had a much finer microstructures because of the lower heat input.The arc constriction by the high frequency pulsing in the Activ Arc■-High frequency(AA-HF)mode welding was responsible for deeper penetration.Welds produced under DCEN pulsing and AA-HF conditions had hardness higher than conventional DCEN,DCEP and AC GTA welds,attributed to the finer microstructure.AA-HF GTA welding produced defect free deeper penetration welds with good microstructural features/mechanical properties and also gave an advantage of 50%enhanced productivity when welded at1500 Hz. 展开更多
关键词 AZ31B alloy Pulse GTAW High frequency Microstructure mechanical properties PRODUCTIVITY
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Function,mechanism of action,metabolism,and commercial application of Lonicera japonica:a review
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作者 Xinli Yang Dan Yan 《Food Science and Human Wellness》 2025年第3期783-805,共23页
Lonicera japonica(honeysuckle)is a traditional Chinese medicinal food,in which the main active ingredients are phenolic acids,polysaccharides,flavonoids,and volatile oils.They have various biological activities,includ... Lonicera japonica(honeysuckle)is a traditional Chinese medicinal food,in which the main active ingredients are phenolic acids,polysaccharides,flavonoids,and volatile oils.They have various biological activities,including antiviral,antibacterial,antioxidant,hypoglycemic and lipid-lowering,and anti-inflammatory effects.This review summarizes the health effects and pharmacodynamic mechanisms of L.japonica extracts and the major active ingredients in these extracts,and the structures,metabolic process in vivo,and biotransformation processes of these compounds.In addition,the current status of the development of L.japonica-related functional foods is summarized.The aim is to provide a theoretical basis and reference for the further development and use of the active ingredients in L.japonica as functional foods for disease prevention and treatment. 展开更多
关键词 Lonicera japonica extract and functional components Health effects mechanISMS Commercial application
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Dynamic damage characteristics and control mechanism of rocks anchored by constant resistance and energy absorption material
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作者 Bei Jiang Kunbo Wu +4 位作者 Qi Wang Yetai Wang Wenrui Wu Yaoxia Feng Yanbo Zhang 《International Journal of Mining Science and Technology》 2025年第1期57-67,共11页
With resource exploitation and engineering construction gradually going deeper,the surrounding rock dynamic disaster becomes frequent and violent.The anchorage support is a common control method of surrounding rock in... With resource exploitation and engineering construction gradually going deeper,the surrounding rock dynamic disaster becomes frequent and violent.The anchorage support is a common control method of surrounding rock in underground engineering.To study the dynamic damage characteristics of anchored rock and the energy absorption control mechanism of dynamic disasters,a new type of constant resistance and energy absorption(CREA)material with high strength,high elongation and high energy absorption characteristics is developed.A contrast test of rockbursts in anchored rock with different support materials is conducted.The test results show that the surface damage rates and energy release degree of anchored rock with common bolt(CB)and CREA are lower than those of unanchored rock,respectively.The total energy,average energy and maximum energy released by CREA anchored rock are 30.9%,94.3%and 84.4%lower than those of CB anchored rock.Compared with unanchored rock,the rockburst peak stress in the CREA anchored rock is increased by 39.9%,and the rockburst time is delayed by 53.2%.Based on the rockburst energy calculation model,the evolution law of rockburst peak stress and energy release is investigated.The control mechanism of CREA support units on rock dynamic failure is clarified. 展开更多
关键词 Constant resistance and energy absorption Anchored rock ROCKBURST Peak stress Control mechanism
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Magnetically-responsive phase change thermal storage materials:Mechanisms,advances,and beyond
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作者 Yan Gao Yang Li +3 位作者 Jinjie Lin Panpan Liu Xiao Chen Ge Wang 《Journal of Energy Chemistry》 2025年第2期485-510,I0010,共27页
Rapid advances in thermal management technology and the increasing need for multi-energy conversion have placed stringent energy efficiency requirements on next-generation shape-stable composite phase change materials... Rapid advances in thermal management technology and the increasing need for multi-energy conversion have placed stringent energy efficiency requirements on next-generation shape-stable composite phase change materials(PCMs).Magnetically-responsive phase change thermal storage materials are considered an emerging concept for energy storage systems,enabling PCMs to perform unprecedented functions(such as green energy utilization,magnetic thermotherapy,drug release,etc.).The combination of multifunctional magnetic nanomaterials and PCMs is a milestone in the creation of advanced multifunctional composite PCMs.However,a timely and comprehensive review of composite PCMs based on magnetic nanoparticle modification is still missing.Herein,we furnish an exhaustive exposition elucidating the cutting-edge advancements in magnetically responsive composite PCMs.We delve deeply into the multifarious roles assumed by distinct nanoparticles within composite PCMs of varying dimensions,meticulously scrutinizing the intricate interplay between their architectures and thermophysical attributes.Moreover,we prognosticate future research trajectories,delineate alternative stratagems,and illuminate prospective avenues.This review is intended to stimulate broader academic interest in interdisciplinary fields and provide valuable insights into the development of next-generation magnetically-responsive composite PCMs. 展开更多
关键词 Phase change materials Magnetic-thermal conversion Magnetic nanoparticles Thermal energy storage Response mechanism
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Plastic deformation mechanism of γ-phase U–Mo alloy studied by molecular dynamics simulations
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作者 Chang Wang Peng Peng Wen-Sheng Lai 《Chinese Physics B》 2025年第1期468-475,共8页
Uranium–molybdenum(U–Mo) alloys are critical for nuclear power generation and propulsion because of their superior thermal conductivity, irradiation stability, and anti-swelling properties. This study explores the p... Uranium–molybdenum(U–Mo) alloys are critical for nuclear power generation and propulsion because of their superior thermal conductivity, irradiation stability, and anti-swelling properties. This study explores the plastic deformation mechanisms of γ-phase U–Mo alloys using molecular dynamics(MD) simulations. In the slip model, the generalized stacking fault energy(GSFE) and the modified Peierls–Nabarro(P–N) model are used to determine the competitive relationships among different slip systems. In the twinning model, the generalized plane fault energy(GPFE) is assessed to evaluate the competition between slip and twinning. The findings reveal that among the three slip systems, the {110}<111>slip system is preferentially activated, while in the {112}<111> system, twinning is favored over slip, as confirmed by MD tensile simulations conducted in various directions. Additionally, the impact of Mo content on deformation behavior is emphasized. Insights are provided for optimizing process conditions to avoid γ → α′′ transitions, thereby maintaining a higher proportion of γ-phase U–Mo alloys for practical applications. 展开更多
关键词 U-Mo alloy molecular dynamics simulation plastic deformation mechanism dislocation slip twin formation
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Effects of aging on mechanical sensitivity threshold and thermal decomposition characteristic of RDX/HMX
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作者 Shian Zhang Yanru Wang +7 位作者 Zeshan Wang Deyun Liu Mingkun Fang Zhiyong Ma Xingliang Wu Xibo Jiang Sen Xu Dabin Liu 《Defence Technology(防务技术)》 2025年第3期62-72,共11页
In order to analyze the influences of storage aging on the safety of typical elemental explosives,the aged cyclotrimethylene trinitramine(RDX)and cyclotetramethylene tetranitramine(HMX)were prepared by isothermal agin... In order to analyze the influences of storage aging on the safety of typical elemental explosives,the aged cyclotrimethylene trinitramine(RDX)and cyclotetramethylene tetranitramine(HMX)were prepared by isothermal aging tests.The reaction thresholds of aged RDX and HMX under any ignition probability were studied by Langlie-Optimal D method.The thermal decomposition characteristics of RDX and HMX after aging were analyzed by DSC and ARC.Experimental results showed that compared with unaged RDX and HMX,on the one hand,the critical impact energy and critical friction of RDX and HMX aged for 14,28,and 56 days are significantly reduced at an explosion probability of 50%,0.01%,and 0.0001%,respectively.With the increase of aging time,the mechanical sensitivity of RDX and HMX increases obviously.On the other hand,the initial decomposition temperature of RDX and HMX after 56 days of aging decreases,the decomposition heat decreases,the activation energy increases,and the reaction difficulty increases. 展开更多
关键词 RDX HMX 71℃isothermal aging Langlie-optimal D method mechanical sensitivity Thermal decomposition characteristic
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Structural designs and mechanism insights into electrocatalytic oxidation of 5-hydroxymethylfurfural
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作者 Jing Lei Huijie Zhang +4 位作者 Jian Yang Jia Ran Jiqiang Ning Haiyan Wang Yong Hu 《Journal of Energy Chemistry》 2025年第1期792-814,共23页
Biomass conversion offers an efficient approach to alleviate the energy and environmental issues.Electrochemical oxidation of 5-hydroxymethylfurfural(HMF)has attracted tremendous attention in the latest few years for ... Biomass conversion offers an efficient approach to alleviate the energy and environmental issues.Electrochemical oxidation of 5-hydroxymethylfurfural(HMF)has attracted tremendous attention in the latest few years for the mild synthesis conditions and high conversion efficiency to obtain 2,5-furan dicarboxylic acid(FDCA),but there still remain problems such as limited yield,short cycle life,and ambiguous reaction mechanism.Despite many reviews highlighting a variety of electrocatalysts for electrochemical oxidation of HMF,a detailed discussion of the structural modulation of catalyst and the underlying catalytic mechanism is still lacking.We herein provide a comprehensive summary of the recent development of electrochemical oxidation of HMF to FDCA,particularly focusing on the mechanism studies as well as the advanced strategies developed to regulate the structure and optimize the performance of the electrocatalysts,including heterointerface construction,defect engineering,single-atom engineering,and in situ reconstruction.Experimental characterization techniques and theoretical calculation methods for mechanism and active site studies are elaborated,and challenges and future directions of electrochemical oxidation of HMF are also prospected.This review will provide guidance for designing advanced catalysts and deepening the understanding of the reaction mechanism beneath electrochemical oxidation of HMF to FDCA. 展开更多
关键词 Electrochemical oxidation of 5- HYDROXYMETHYLFURFURAL 2 5-Furan dicarboxylic acid Structural design mechanISM ELECTROCATALYSTS
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Preliminary study on degradation mechanisms of plasma-treated DR1 by atomistic simulations
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作者 Namunakhon NABIYEVA Tohir AKRAMOV +3 位作者 Davronjon ABDUVOKHIDOV Yuantao ZHANG Maksudbek YUSUPOV Jamoliddin RAZZOKOV 《Plasma Science and Technology》 2025年第3期94-103,共10页
Cold atmospheric plasma(CAP)has emerged as a promising technology for the degradation of organic dyes,but the underlying mechanisms at the molecular level remain poorly understood.Using density-functional tight-bindin... Cold atmospheric plasma(CAP)has emerged as a promising technology for the degradation of organic dyes,but the underlying mechanisms at the molecular level remain poorly understood.Using density-functional tight-binding(DFTB)-based quantum chemical molecular dynamics at 300 K,we have performed numerical simulations to investigate the degradation mechanism of Disperse Red 1(DR)interacting with CAP-generated oxygen radicals.One hundred directdynamics trajectories were calculated for up to 100 ps simulation time,after which hydrogenabstraction,benzene ring-opening/expanding,formaldehyde formation and modification in the chromophoric azo group which can lead to color-losing were observed.The latter was obtained with yields of around 6%at the given temperature.These findings not only enhance our understanding of CAP treatment processes but also have implications for the development of optimized purification systems for sustainable wastewater treatment.This study underscores the utility of DFTB simulations in unraveling complex chemical processes and guiding the design of advanced treatment strategies in the context of CAP technology. 展开更多
关键词 wastewater treatment disperse red 1 cold atmospheric plasma reactive oxygen species reactive molecular dynamics degradation mechanisms
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