Vortex spinning is an innovative air-jet spinning technology with promising features.A comparison of the vortex and ring spun cotton yarns and their knitted fabric properties was provided to evaluate the latent capabi...Vortex spinning is an innovative air-jet spinning technology with promising features.A comparison of the vortex and ring spun cotton yarns and their knitted fabric properties was provided to evaluate the latent capability of the vortex spinning technology.The results show that the vortex yarn has better elongation,evenness and much less hairiness than the ring yarn.The vortex fabric is found to have better air permeability,bursting properties,and pilling resistance than the ring fabric,while the drapeability and abrasion resistance of the ring fabric are better than the vortex fabric.展开更多
A three-dimensional computational fluid dynamics model is developed by software Fluent 6.2, to simulate the flow field inside the nozzle block of the Murata vortex spinning. The flowing state and the distribution law ...A three-dimensional computational fluid dynamics model is developed by software Fluent 6.2, to simulate the flow field inside the nozzle block of the Murata vortex spinning. The flowing state and the distribution law of static pressure and velocity are characterized and analyzed. The relationship between the flowing state and the structure of the vortex spun yarn is also discussed. The research results can enhance the understanding of the yarn formation principle from viewpoint of the airflow field law inside the nozzle block of Murata vortex spinning.展开更多
Solar-driven interfacial desalination has been considered a promising and green technology for relieving worldwide water shortage because of its zero carbon emission.However,salt accumulation during evaporation result...Solar-driven interfacial desalination has been considered a promising and green technology for relieving worldwide water shortage because of its zero carbon emission.However,salt accumulation during evaporation results in a significant reduction in solar evaporation performance and sustained service life.High-performance and long-term salt-rejecting solar evaporators are urgently desirable.Inspired by the rapid water transfer driven by leaf transpiration and the capillary pressure in woody plants,we developed electrospun polyacrylonitrile@carbon nanotubes nanofiber/cotton core-spun yarn(PCCS yarn)based solar evaporator enabled by the multi-branch microchannels and sub-microchannels for ultra-efficient and durable high-salinity brine desalination.The optimal PCCS yarn-based solar evaporator exhibits a record-high evaporation rate of 3.46 kg m^(-2)h^(-1)under one sun illumination among 2D evaporators.Meanwhile,an excellent and stable brine desalination rate of∼2.75 kg m^(-2)h^(-1)for 100 h continuous solar irradiation is achieved even in 20wt%NaCl solution.The above results are attributed to the massive micro evaporation surfaces formed between nanofibers,rapid water replenishment in the radius direction,and orientational fast water transport by Laplace pressure along and across the PCCS yarn.In addition,the continuous preparation of the core-spun yarn by the conjugated electrospinning technology and the complete fabric production process in the textile industry make it possible for the practical application of the PCCS yarn-based solar evaporator.This work promotes the development of high-performance,long-term and scalable solar desalination devices.展开更多
基金National Natural Science Foundation of China(No.51076026)Natural Science Foundation of Shanghai,China(No.12ZR1440300)the Fundamental Research Funds for the Central Universities of China
文摘Vortex spinning is an innovative air-jet spinning technology with promising features.A comparison of the vortex and ring spun cotton yarns and their knitted fabric properties was provided to evaluate the latent capability of the vortex spinning technology.The results show that the vortex yarn has better elongation,evenness and much less hairiness than the ring yarn.The vortex fabric is found to have better air permeability,bursting properties,and pilling resistance than the ring fabric,while the drapeability and abrasion resistance of the ring fabric are better than the vortex fabric.
基金This project is supported by the National Natural Science Foundation of China,under grant No.10872047.
文摘A three-dimensional computational fluid dynamics model is developed by software Fluent 6.2, to simulate the flow field inside the nozzle block of the Murata vortex spinning. The flowing state and the distribution law of static pressure and velocity are characterized and analyzed. The relationship between the flowing state and the structure of the vortex spun yarn is also discussed. The research results can enhance the understanding of the yarn formation principle from viewpoint of the airflow field law inside the nozzle block of Murata vortex spinning.
基金supported by the National Natural Science Foundation of China(51973027,52003044,52373069,52373032)the Fundamental Research Funds for the Central Universities(2232020A-08)+5 种基金International Cooperation Fund of Science and Technology Commission of Shanghai Municipality(21130750100)Major Scientific and Technological Innovation Projects of Shandong Province(2021CXGC011004)supported by the Innovation Program of Shanghai Municipal Education Commission(2019-01-07-0003-E00023)to Prof.Xiaohong QinYoung Elite Scientists Sponsorship Program by CAST,State Key Laboratory for Modification of Chemical Fibers and Polymer Materials(KF2216)DHU Distinguished Young Professor Program to Profthe Fundamental Research Funds for the Central Universities and Graduate Student Innovation Fund of Donghua University(CUSF-DH-D-2022039)to Mantang He.
文摘Solar-driven interfacial desalination has been considered a promising and green technology for relieving worldwide water shortage because of its zero carbon emission.However,salt accumulation during evaporation results in a significant reduction in solar evaporation performance and sustained service life.High-performance and long-term salt-rejecting solar evaporators are urgently desirable.Inspired by the rapid water transfer driven by leaf transpiration and the capillary pressure in woody plants,we developed electrospun polyacrylonitrile@carbon nanotubes nanofiber/cotton core-spun yarn(PCCS yarn)based solar evaporator enabled by the multi-branch microchannels and sub-microchannels for ultra-efficient and durable high-salinity brine desalination.The optimal PCCS yarn-based solar evaporator exhibits a record-high evaporation rate of 3.46 kg m^(-2)h^(-1)under one sun illumination among 2D evaporators.Meanwhile,an excellent and stable brine desalination rate of∼2.75 kg m^(-2)h^(-1)for 100 h continuous solar irradiation is achieved even in 20wt%NaCl solution.The above results are attributed to the massive micro evaporation surfaces formed between nanofibers,rapid water replenishment in the radius direction,and orientational fast water transport by Laplace pressure along and across the PCCS yarn.In addition,the continuous preparation of the core-spun yarn by the conjugated electrospinning technology and the complete fabric production process in the textile industry make it possible for the practical application of the PCCS yarn-based solar evaporator.This work promotes the development of high-performance,long-term and scalable solar desalination devices.
