This study investigates the influence of electropolymerization conditions on the deposition of polypyrrole(PPy)onto cotton-derived carbon fiber(CF)modified with reduced graphene oxide(rGO)for supercapacitors applicati...This study investigates the influence of electropolymerization conditions on the deposition of polypyrrole(PPy)onto cotton-derived carbon fiber(CF)modified with reduced graphene oxide(rGO)for supercapacitors applications using an experimental/theorical approach.The surface modification of CF by rGO and/or by PPy electrodeposited at 10,25 and 50 mV s^(-1) was thoroughly examined physicochemical and electrochemically.Composite electrodes comprising CF-rGo-PPy,synthesized via electropolymerization at 25 mV s^(-1),demonstrated a remarkable increase in capacitance,showcasing~742 F g^(-1) compared to 153 F g^(-1) for CF.SEM,N_(2)-surface area,XPS,and TD-DFT approach revealed that the higher capacitance observed in CF-rGo-PPy electrodes underscores the influence of morphology and charged nitrogen species on the electrochemical performance of these modified electrodes.Notably,this electrode material achieves a specific capacitance retention of~96%of their initial capacitance after 10000 cycles at 0.5 A g^(-1) measured in a two-electrodes cell configuration.This work also discusses the influence of the scan rate used for pyrrole electropolymerization on the pseudocapacitance contribution of PPy and its possible effect on the porosity of the material.These results highlight the importance of appropriate electropolymerization conditions that allow obtaining the synergistic effect between CF,rGO and PPy.展开更多
Researchers at Lund University in Sweden have now succeeded in making new viscose-from wornout cotton sheets.Old textiles around the world end up at the rubbish tip and are often burned.In Sweden,they are generally bu...Researchers at Lund University in Sweden have now succeeded in making new viscose-from wornout cotton sheets.Old textiles around the world end up at the rubbish tip and are often burned.In Sweden,they are generally burned to produce district heating.Extensive development work is being conducted to give old clothes and textiles a worthier end.The planet really needs recycled textiles,as it takes a lot of energy,water and land to cultivate cotton and other plant sources for textiles.However,there are many challenges.展开更多
The growth of the global cotton trade is projected to be driven by Vietnam and Bangladesh over the course of the next decade.This is according to the OECD-FAO Agricultural Outlook2024-2033 report,which states that the...The growth of the global cotton trade is projected to be driven by Vietnam and Bangladesh over the course of the next decade.This is according to the OECD-FAO Agricultural Outlook2024-2033 report,which states that the world cotton trade is expected to expand at a rate of 2.1 per cent per annum (p.a.) over the next ten years,reaching 12.4 million tonnes (Mt) in 2033.展开更多
3月20日,美国国际棉花协会（Cotton Council International,CCI）COTTON USA：＂I LOVE MY COTTON＂推广活动启动仪式在京举办。本刊记者受邀参加启动仪式并采访了美国国家棉花总会会长及首席执行官Gary Adams博士、美国国际棉花协会中...3月20日,美国国际棉花协会（Cotton Council International,CCI）COTTON USA：＂I LOVE MY COTTON＂推广活动启动仪式在京举办。本刊记者受邀参加启动仪式并采访了美国国家棉花总会会长及首席执行官Gary Adams博士、美国国际棉花协会中国和东北亚区总监毛凯琳（Karin Malmstrom）女士。展开更多
To study the effect of soil water and salt environment factors on the root growth of cotton under different moisture control,three different emergence water volumes(60,105,and 150 m^(3)/hm^(2)),two different frequenci...To study the effect of soil water and salt environment factors on the root growth of cotton under different moisture control,three different emergence water volumes(60,105,and 150 m^(3)/hm^(2)),two different frequencies(high frequency and low frequency)and one double film cover winter irrigation control treatment(CK:2250 m^(3)/hm^(2))were set up to analyze the spatial distribution patterns of soil water and salt environment and root density in dry sown and wet emerged cotton fields under diffe-rent moisture control conditions.The results show that the soil water content and water infiltration range gradually become larger with the increase of seedling water quantity,and the larger the seedling water quantity,the higher the soil water content.With the same seedling water quantity,the soil water content of the high-frequency(HF)treatment becomes obviously larger.The soil conductivity of each treatment tends to decrease gradually with the increase of seedling water and drip frequency,among which the distribution of soil conductivity of S6 treatment is closest to that of CK.With the increase in soil depth,the soil conductivity tends to increase first and then decrease.Compared with the low-frequency(LF)treatment,the high-frequency treatment shows a significantly deeper soil salt accumulation layer.The root length density(RLD)of cotton gradually increases with the amount of seedling water and the frequency of dripping.The soil layer of root distribution gradually deepens with the amount of seedling water in the vertical direction,and the RLD value in the horizontal direction is significantly greater in the mulched area than that in the bare area between films.This research can serve as a solid scientific foundation for the use of dry sowing and wet emergence techniques in cotton fields in southern Xinjiang.展开更多
6月19日,由美国国际棉花协会(Cot ton Cou nci l International,简称"CCI")举办的COTTON USA未来论坛在上海成功举行。美国国际棉花协会、美国棉花公司负责人,中国棉花协会、中国纺织工业联合会领导,以及来自49家中国企业以...6月19日,由美国国际棉花协会(Cot ton Cou nci l International,简称"CCI")举办的COTTON USA未来论坛在上海成功举行。美国国际棉花协会、美国棉花公司负责人,中国棉花协会、中国纺织工业联合会领导,以及来自49家中国企业以及国内外知名品牌和零售商的89名代表、美国驻沪总领事馆农业贸易处代表参加了此次论坛。展开更多
Macroeconomic Overview:The U.S.dollar has fallen 4%against a broad collection of widely circulated currencies since January.While the magnitude of the decline may not appear large,it does signal an important reversal ...Macroeconomic Overview:The U.S.dollar has fallen 4%against a broad collection of widely circulated currencies since January.While the magnitude of the decline may not appear large,it does signal an important reversal relative to recent years.Against the same broad collection of currencies,the U.S.dollar had consistently strengthened since 2013。展开更多
Going to the movies has become an expensive and often annoying activity.In some parts of the country,movie-goers are paying as much as＄10.50 a ticket. Multiply that times two if you take a friend;then add in popcorn ...Going to the movies has become an expensive and often annoying activity.In some parts of the country,movie-goers are paying as much as＄10.50 a ticket. Multiply that times two if you take a friend;then add in popcorn and soda,and maybe some chocolate covered raisins,too---they are"nature’s candy"---and you’re＄40 the poorer.展开更多
Multifunctional fabrics of high durability through a scalable and eco-friendly technique remains a great challenge hindering their commercialization.In this work,we report a facile synthesis technique for the fabricat...Multifunctional fabrics of high durability through a scalable and eco-friendly technique remains a great challenge hindering their commercialization.In this work,we report a facile synthesis technique for the fabrication of superhydrophobic antibacterial fabrics by employing fluorine-free silane coupling agents as cross-linkers for enhanced durability.Three silane cross-linkers,Aminoethylaminopropyltrimethoxysilane(AEAPTMS),Aminopropyltriethoxysilane(APTES),and Methacryloyloxypropyltrimethoxysilane(MPTMS),have been investigated.During the fabrication,a low surface energy polymer,polydimethylsiloxane(PDMS)was first deposited on cotton fabrics.Subsequently,antibacterial copper oxide(CuO)nanoparticles were anchored on the PDMS coated fabrics using the silane cross-linkers.The as-prepared fabrics displayed high superhydrophobicity and antibacterial performance with water contact angle(WCA)>153,water shedding angle(WSA)<5,and up to 99%antibacterial efficiency.Additionally,the as-prepared fabrics displayed high durability against abrasion,ultrasonic washing,and soaking in harsh chemical environments.The air permeability and flexibility of the fabric was not compromised after the coating.The above-reported technique is simple,cost-effective and holds tremendous potential for large-scale production of energy-saving clothing and healthcare products.展开更多
Developing moisture-sensitive artificial muscles from industrialized natural fibers with large abundance is highly desired for smart textiles that can respond to humidity or temperature change.However,currently most o...Developing moisture-sensitive artificial muscles from industrialized natural fibers with large abundance is highly desired for smart textiles that can respond to humidity or temperature change.However,currently most of fiber artificial muscles are based on non-common industrial textile materials or of a small portion of global textile fiber market.In this paper,we developed moisture-sensitive torsional artificial muscles and textiles based on cotton yarns.It was prepared by twisting the cotton yarn followed by folding in the middle point to form a self-balanced structure.The cotton yarn muscle showed a torsional stroke of 42.55°/mm and a rotational speed of 720 rpm upon exposure to water moisture.Good reversibility and retention of stroke during cyclic exposure and removal of water moisture were obtained.A moisturesensitive smart window that can close when it rains was demonstrated based on the torsional cotton yarn muscles.This twist-based technique combining natural textile fibers provides a new insight for construction of smart textile materials.展开更多
Effect of parameters of ion implantation machine, including ion energy, total dose, dose rate, impulse energy and implantation interval on the pollen grains of upland cotton implanted with nitrogen ion beam were studi...Effect of parameters of ion implantation machine, including ion energy, total dose, dose rate, impulse energy and implantation interval on the pollen grains of upland cotton implanted with nitrogen ion beam were studied. The best parameters were screened out. The results also showed that the vacuum condition before the nitrogen ion implantation does not affect the pollen viability.展开更多
基金CONCYTEC and PROCIENCIA agencies from Peru in the framework of the call for Basic Research Projects2019-01[contract number401-2019-FONDECYT].
文摘This study investigates the influence of electropolymerization conditions on the deposition of polypyrrole(PPy)onto cotton-derived carbon fiber(CF)modified with reduced graphene oxide(rGO)for supercapacitors applications using an experimental/theorical approach.The surface modification of CF by rGO and/or by PPy electrodeposited at 10,25 and 50 mV s^(-1) was thoroughly examined physicochemical and electrochemically.Composite electrodes comprising CF-rGo-PPy,synthesized via electropolymerization at 25 mV s^(-1),demonstrated a remarkable increase in capacitance,showcasing~742 F g^(-1) compared to 153 F g^(-1) for CF.SEM,N_(2)-surface area,XPS,and TD-DFT approach revealed that the higher capacitance observed in CF-rGo-PPy electrodes underscores the influence of morphology and charged nitrogen species on the electrochemical performance of these modified electrodes.Notably,this electrode material achieves a specific capacitance retention of~96%of their initial capacitance after 10000 cycles at 0.5 A g^(-1) measured in a two-electrodes cell configuration.This work also discusses the influence of the scan rate used for pyrrole electropolymerization on the pseudocapacitance contribution of PPy and its possible effect on the porosity of the material.These results highlight the importance of appropriate electropolymerization conditions that allow obtaining the synergistic effect between CF,rGO and PPy.
文摘Researchers at Lund University in Sweden have now succeeded in making new viscose-from wornout cotton sheets.Old textiles around the world end up at the rubbish tip and are often burned.In Sweden,they are generally burned to produce district heating.Extensive development work is being conducted to give old clothes and textiles a worthier end.The planet really needs recycled textiles,as it takes a lot of energy,water and land to cultivate cotton and other plant sources for textiles.However,there are many challenges.
文摘The growth of the global cotton trade is projected to be driven by Vietnam and Bangladesh over the course of the next decade.This is according to the OECD-FAO Agricultural Outlook2024-2033 report,which states that the world cotton trade is expected to expand at a rate of 2.1 per cent per annum (p.a.) over the next ten years,reaching 12.4 million tonnes (Mt) in 2033.
文摘3月20日,美国国际棉花协会（Cotton Council International,CCI）COTTON USA：＂I LOVE MY COTTON＂推广活动启动仪式在京举办。本刊记者受邀参加启动仪式并采访了美国国家棉花总会会长及首席执行官Gary Adams博士、美国国际棉花协会中国和东北亚区总监毛凯琳（Karin Malmstrom）女士。
基金National Key Research and Development Plan(2021YFD1900805)Funded Project of Basic Scientific Research Business of Public Welfare Research Institutes in Autonomous Region(KY2022127)。
文摘To study the effect of soil water and salt environment factors on the root growth of cotton under different moisture control,three different emergence water volumes(60,105,and 150 m^(3)/hm^(2)),two different frequencies(high frequency and low frequency)and one double film cover winter irrigation control treatment(CK:2250 m^(3)/hm^(2))were set up to analyze the spatial distribution patterns of soil water and salt environment and root density in dry sown and wet emerged cotton fields under diffe-rent moisture control conditions.The results show that the soil water content and water infiltration range gradually become larger with the increase of seedling water quantity,and the larger the seedling water quantity,the higher the soil water content.With the same seedling water quantity,the soil water content of the high-frequency(HF)treatment becomes obviously larger.The soil conductivity of each treatment tends to decrease gradually with the increase of seedling water and drip frequency,among which the distribution of soil conductivity of S6 treatment is closest to that of CK.With the increase in soil depth,the soil conductivity tends to increase first and then decrease.Compared with the low-frequency(LF)treatment,the high-frequency treatment shows a significantly deeper soil salt accumulation layer.The root length density(RLD)of cotton gradually increases with the amount of seedling water and the frequency of dripping.The soil layer of root distribution gradually deepens with the amount of seedling water in the vertical direction,and the RLD value in the horizontal direction is significantly greater in the mulched area than that in the bare area between films.This research can serve as a solid scientific foundation for the use of dry sowing and wet emergence techniques in cotton fields in southern Xinjiang.
文摘6月19日,由美国国际棉花协会(Cot ton Cou nci l International,简称"CCI")举办的COTTON USA未来论坛在上海成功举行。美国国际棉花协会、美国棉花公司负责人,中国棉花协会、中国纺织工业联合会领导,以及来自49家中国企业以及国内外知名品牌和零售商的89名代表、美国驻沪总领事馆农业贸易处代表参加了此次论坛。
文摘Macroeconomic Overview:The U.S.dollar has fallen 4%against a broad collection of widely circulated currencies since January.While the magnitude of the decline may not appear large,it does signal an important reversal relative to recent years.Against the same broad collection of currencies,the U.S.dollar had consistently strengthened since 2013。
文摘Going to the movies has become an expensive and often annoying activity.In some parts of the country,movie-goers are paying as much as＄10.50 a ticket. Multiply that times two if you take a friend;then add in popcorn and soda,and maybe some chocolate covered raisins,too---they are"nature’s candy"---and you’re＄40 the poorer.
基金supported by the National Natural Science Foundation of China(51402048)Fundamental Research Funds for the Central Universities,China+2 种基金DHU Distinguished Young Professor ProgramScientific Research Foundation for the Returned Overseas Chinese ScholarsMinistry of Education of China~~
基金Financial assistance from Ministry of Education,Singapore(RG 16/18)is gratefully acknowledged.
文摘Multifunctional fabrics of high durability through a scalable and eco-friendly technique remains a great challenge hindering their commercialization.In this work,we report a facile synthesis technique for the fabrication of superhydrophobic antibacterial fabrics by employing fluorine-free silane coupling agents as cross-linkers for enhanced durability.Three silane cross-linkers,Aminoethylaminopropyltrimethoxysilane(AEAPTMS),Aminopropyltriethoxysilane(APTES),and Methacryloyloxypropyltrimethoxysilane(MPTMS),have been investigated.During the fabrication,a low surface energy polymer,polydimethylsiloxane(PDMS)was first deposited on cotton fabrics.Subsequently,antibacterial copper oxide(CuO)nanoparticles were anchored on the PDMS coated fabrics using the silane cross-linkers.The as-prepared fabrics displayed high superhydrophobicity and antibacterial performance with water contact angle(WCA)>153,water shedding angle(WSA)<5,and up to 99%antibacterial efficiency.Additionally,the as-prepared fabrics displayed high durability against abrasion,ultrasonic washing,and soaking in harsh chemical environments.The air permeability and flexibility of the fabric was not compromised after the coating.The above-reported technique is simple,cost-effective and holds tremendous potential for large-scale production of energy-saving clothing and healthcare products.
基金Project supported by the National Key Research and Development Program of China(Grant No.2017YFB0307001)the National Natural Science Foundation of China(Grant Nos.U1533122 and 51773094)+4 种基金the Natural Science Foundation of Tianjin,China(Grant No.18JCZDJC36800)the Science Foundation for Distinguished Young Scholars of Tianjin,China(Grant No.18JCJQJC46600)the Fundamental Research Funds for the Central Universities,China(Grant No.63171219)Key Laboratory for Medical Data Analysis and Statistical Research of TianjinState Key Laboratory for Modification of Chemical Fibers and Polymer Materials,Donghua University(Grant No.LK1704)。
文摘Developing moisture-sensitive artificial muscles from industrialized natural fibers with large abundance is highly desired for smart textiles that can respond to humidity or temperature change.However,currently most of fiber artificial muscles are based on non-common industrial textile materials or of a small portion of global textile fiber market.In this paper,we developed moisture-sensitive torsional artificial muscles and textiles based on cotton yarns.It was prepared by twisting the cotton yarn followed by folding in the middle point to form a self-balanced structure.The cotton yarn muscle showed a torsional stroke of 42.55°/mm and a rotational speed of 720 rpm upon exposure to water moisture.Good reversibility and retention of stroke during cyclic exposure and removal of water moisture were obtained.A moisturesensitive smart window that can close when it rains was demonstrated based on the torsional cotton yarn muscles.This twist-based technique combining natural textile fibers provides a new insight for construction of smart textile materials.
基金National Natural Science Foundation of China(No.10475041)
文摘Effect of parameters of ion implantation machine, including ion energy, total dose, dose rate, impulse energy and implantation interval on the pollen grains of upland cotton implanted with nitrogen ion beam were studied. The best parameters were screened out. The results also showed that the vacuum condition before the nitrogen ion implantation does not affect the pollen viability.
