Poly（vinylidene fluoride-co-hexafluoropropylene） （PVDF-HFP） based composite polymer electrolyte （CPE） modified with CeO2, La2O3 and Y2O3 nano-rare earth oxides was prepared by phase inversion technique. Physical...Poly（vinylidene fluoride-co-hexafluoropropylene） （PVDF-HFP） based composite polymer electrolyte （CPE） modified with CeO2, La2O3 and Y2O3 nano-rare earth oxides was prepared by phase inversion technique. Physical and chemical properties of the modified CPEs were studied by SEM, TG-DSC and electrochemical methods. The results show that the CPE modified with 10% La2O3 （mass fraction） has the best practical applicability, which indicates that the thermal and electrochemical stability can reach over 400 ℃ and 4.5 V, respectively, and temperature dependence of ionic conductivity follows Vogel-Tamman-Fulcher （VTF） relationship and ionic conductivity at room temperature is up to 3.3 mS/cm. The interfacial resistance Ri reaches a stable value about 557 Ω after 6 d storage.展开更多
Chemical warfare agents(CWAs)are extremely lethal substances used in warfare and terrorism,capable of causing permanent damage even in small doses,despite medical intervention.Therefore,detection,protection,and detoxi...Chemical warfare agents(CWAs)are extremely lethal substances used in warfare and terrorism,capable of causing permanent damage even in small doses,despite medical intervention.Therefore,detection,protection,and detoxification of CWAs are vital for the safety of first responders,military personnel,and civilians,driving significant research in this area.Herein,we designed and synthesized a poly(-diallyldimethylammonium chloride)(PDDA)mediated cupric oxide(CuO)functionalized activated carbon fabric(ACF),termed ACF@PDDA-CuO,as an adsorbent filter material for self-detoxifying chemical protective clothing.PDDA,a positively charged polyelectrolyte,effectively binds in-situ synthesized CuO to the negatively charged ACF surface,serving as a suitable binder.This study demonstrates the synergistic effects of PDDA-CuO functionalization on ACF,where PDDA treatment enhanced mechanical and comfort properties,and CuO crystal growth significantly improved detoxification efficacy against the CWA Nerve Agent Sarin.Comprehensive analyses,including FTIR,BET surface area analysis,SEM,EDS,TEM,STEM,TGA,XPS,and XRD,confirmed the uniform deposition of CuO and PDDA on the ACF surface.The Cu content on ACF@PDDA-CuO samples was measured via iodometric titration.The materials were evaluated for tensile strength,air permeability,water vapor permeability,nerve agent(Sarin)detoxification,and blister agent(Sulfur Mustard)breakthrough time to assess their applicability for protective clothing.The optimized PDDA-CuO on ACF detoxified 82.04%of Sarin within 18 h,compared to 25.22%by ACF alone,and enhanced tensile strength by 23.67%,air permeability by 24.63%,and water vapor permeability by 3.94%,while maintaining protection against Sulfur Mustard for 24 h.These findings indicate that ACF@PDDA-CuO is a promising candidate for CWA protective clothing,offering robust protection with enhanced comfort.展开更多
基金Project(2011FJ1005)supported by the Major Provincial Science and Technology Program of Hunan Province,ChinaProject(2010qzzd0101)supported by the Central College on the 2010 Operational Costs of Basic Research Program,China
文摘Poly（vinylidene fluoride-co-hexafluoropropylene） （PVDF-HFP） based composite polymer electrolyte （CPE） modified with CeO2, La2O3 and Y2O3 nano-rare earth oxides was prepared by phase inversion technique. Physical and chemical properties of the modified CPEs were studied by SEM, TG-DSC and electrochemical methods. The results show that the CPE modified with 10% La2O3 （mass fraction） has the best practical applicability, which indicates that the thermal and electrochemical stability can reach over 400 ℃ and 4.5 V, respectively, and temperature dependence of ionic conductivity follows Vogel-Tamman-Fulcher （VTF） relationship and ionic conductivity at room temperature is up to 3.3 mS/cm. The interfacial resistance Ri reaches a stable value about 557 Ω after 6 d storage.
基金Defence Research and Development Establishment(DRDE),DRDO,Gwalior-474002,(India)for his keen interestencouragement.The DRDE accession number for this manuscript is DRDE-IREC-130-28/03/2024.
文摘Chemical warfare agents(CWAs)are extremely lethal substances used in warfare and terrorism,capable of causing permanent damage even in small doses,despite medical intervention.Therefore,detection,protection,and detoxification of CWAs are vital for the safety of first responders,military personnel,and civilians,driving significant research in this area.Herein,we designed and synthesized a poly(-diallyldimethylammonium chloride)(PDDA)mediated cupric oxide(CuO)functionalized activated carbon fabric(ACF),termed ACF@PDDA-CuO,as an adsorbent filter material for self-detoxifying chemical protective clothing.PDDA,a positively charged polyelectrolyte,effectively binds in-situ synthesized CuO to the negatively charged ACF surface,serving as a suitable binder.This study demonstrates the synergistic effects of PDDA-CuO functionalization on ACF,where PDDA treatment enhanced mechanical and comfort properties,and CuO crystal growth significantly improved detoxification efficacy against the CWA Nerve Agent Sarin.Comprehensive analyses,including FTIR,BET surface area analysis,SEM,EDS,TEM,STEM,TGA,XPS,and XRD,confirmed the uniform deposition of CuO and PDDA on the ACF surface.The Cu content on ACF@PDDA-CuO samples was measured via iodometric titration.The materials were evaluated for tensile strength,air permeability,water vapor permeability,nerve agent(Sarin)detoxification,and blister agent(Sulfur Mustard)breakthrough time to assess their applicability for protective clothing.The optimized PDDA-CuO on ACF detoxified 82.04%of Sarin within 18 h,compared to 25.22%by ACF alone,and enhanced tensile strength by 23.67%,air permeability by 24.63%,and water vapor permeability by 3.94%,while maintaining protection against Sulfur Mustard for 24 h.These findings indicate that ACF@PDDA-CuO is a promising candidate for CWA protective clothing,offering robust protection with enhanced comfort.
