Carbon nanofibers(CNFs)with excellent conductivity and stability have become a promising material to design the strain sensing network.To date,however,the effect of the stacked structure of CNF membrane on the sensing...Carbon nanofibers(CNFs)with excellent conductivity and stability have become a promising material to design the strain sensing network.To date,however,the effect of the stacked structure of CNF membrane on the sensing performance has rarely been stu-died.In this work,we reported a high-performance sensor based on the cross-stacked aligned CNF membrane.The effects of crossstacked structures on the sensing characteristics were systemati-cally investigated.The flexible strain sensor could capture low detection limit(<0.1%)with a gauge factor(GF)of 4.24 and wide strain range up to 130%.The uniform GF value reached 2050 when the strain was in the range of 100-130%.In addition,the high linearity under 40%strain(>0.998),excellent durability and quick response time(<200 ms)were demonstrated.The excellent com-prehensive performances were simultaneously obtained.The sen-sor could be used in extensive applications,such as monitoring body movements and distinguishing the track of writing.展开更多
木质素的高价值利用满足了废弃物资源化利用的需求,对实现碳中和具有重要意义.然而,木质素在高温下不稳定,容易熔化和变形,需要较长的稳定时间.通过电纺制备的碳纳米纤维(CNF)膜具有高纵横比、低密度、良好的光吸收和丰富的孔隙结构等优...木质素的高价值利用满足了废弃物资源化利用的需求,对实现碳中和具有重要意义.然而,木质素在高温下不稳定,容易熔化和变形,需要较长的稳定时间.通过电纺制备的碳纳米纤维(CNF)膜具有高纵横比、低密度、良好的光吸收和丰富的孔隙结构等优势.本文基于共电纺技术制备了一种以木质素为基础的CNF膜材料.该材料的制备过程不仅能够节省木质素基纳米纤维的稳定时间,还通过氯化锌激活和添加孔隙形成剂(苯二甲酸和聚甲基丙烯酸甲酯)提高了膜的亲水性和光吸收性能.作为界面太阳蒸发系统的光热层,该膜在整个太阳光谱下的光吸收率为94.3%.此外,以制备的CNF膜作为光热层的界面太阳蒸发系统(@1 sun)表现出1.43 kg m^(-2)h^(-1)的蒸发速率,蒸发效率为93.8%.此外,蒸发器具有良好的循环和耐盐性能,在连续照射15 h后仍然保持卓越的蒸发速率.这种以木质素为主要碳源的CNF膜在海水淡化应用中具有巨大的光热转化潜力.展开更多
基金This work was supported by the Jiangsu Planned Projects for Postdoctoral Research Funds[2020Z251]Primary Research&Developement Plan of Jiangsu Province[BE2019045]+1 种基金Science and Technology Guidance Project of China National Textile and Apparel Council[2020102]Third-Priority Academic Program Development of Jiangsu Higher Education Institutions.
文摘Carbon nanofibers(CNFs)with excellent conductivity and stability have become a promising material to design the strain sensing network.To date,however,the effect of the stacked structure of CNF membrane on the sensing performance has rarely been stu-died.In this work,we reported a high-performance sensor based on the cross-stacked aligned CNF membrane.The effects of crossstacked structures on the sensing characteristics were systemati-cally investigated.The flexible strain sensor could capture low detection limit(<0.1%)with a gauge factor(GF)of 4.24 and wide strain range up to 130%.The uniform GF value reached 2050 when the strain was in the range of 100-130%.In addition,the high linearity under 40%strain(>0.998),excellent durability and quick response time(<200 ms)were demonstrated.The excellent com-prehensive performances were simultaneously obtained.The sen-sor could be used in extensive applications,such as monitoring body movements and distinguishing the track of writing.
基金supported by the National Natural Science Foundation of China (31901274)the 13th China Special Postdoctoral Science Foundation (2020T130303)+1 种基金China Postdoctoral Science Foundation (2019M661854)the Postdoctoral Science Foundation of Jiangsu Province (2019K142)。
文摘木质素的高价值利用满足了废弃物资源化利用的需求,对实现碳中和具有重要意义.然而,木质素在高温下不稳定,容易熔化和变形,需要较长的稳定时间.通过电纺制备的碳纳米纤维(CNF)膜具有高纵横比、低密度、良好的光吸收和丰富的孔隙结构等优势.本文基于共电纺技术制备了一种以木质素为基础的CNF膜材料.该材料的制备过程不仅能够节省木质素基纳米纤维的稳定时间,还通过氯化锌激活和添加孔隙形成剂(苯二甲酸和聚甲基丙烯酸甲酯)提高了膜的亲水性和光吸收性能.作为界面太阳蒸发系统的光热层,该膜在整个太阳光谱下的光吸收率为94.3%.此外,以制备的CNF膜作为光热层的界面太阳蒸发系统(@1 sun)表现出1.43 kg m^(-2)h^(-1)的蒸发速率,蒸发效率为93.8%.此外,蒸发器具有良好的循环和耐盐性能,在连续照射15 h后仍然保持卓越的蒸发速率.这种以木质素为主要碳源的CNF膜在海水淡化应用中具有巨大的光热转化潜力.
