传统的城市开发模式集中体现为不透水面积的增加,以及＂排水管沟＂加处理＂终端＂的高效城市排水系统。这种模式对环境与生态造成了极大影响,集中体现在：第一,破坏场地自然水循环,增加了地表水量以及径流量;第二,影响地表水水质;第三,...传统的城市开发模式集中体现为不透水面积的增加,以及＂排水管沟＂加处理＂终端＂的高效城市排水系统。这种模式对环境与生态造成了极大影响,集中体现在：第一,破坏场地自然水循环,增加了地表水量以及径流量;第二,影响地表水水质;第三,影响地下水水质和水量;第四,影响河流的自然形态;第五,破坏水生栖息地;第六,改变地方的能量平衡与微气候（Schueler T.,1994;Kent B.Barnes,John M.Morgan III,and Martin C.Roberge,2001;Christine Anne Zimmer,2006）。展开更多
Nanocomposite fibers have attracted intensive attentions owing to their promising applications in various fields. However, the fabrication of nanocomposite fibers with super toughness and strong strength under mild co...Nanocomposite fibers have attracted intensive attentions owing to their promising applications in various fields. However, the fabrication of nanocomposite fibers with super toughness and strong strength under mild conditions remains a great challenge. Here we present a facile flow-induced assembly strategy for the development of super-tough and strong nanocomposite fibers with highly ordered carbon nanotubes (CNTs), which can be induced by directional and fast flow on a grooved hydrogel surface. The prepared nanocomposite fibers show excellent mechanical properties, with a tensile strength up to 643±27 MPa and toughness as high as 77.3±3.4 MJ m^-3 at ultimate strain of 14.8±1.5%. This versatile and efficient flow-induced alignment strategy represents a promising direction for the development of high-performance nanocomposites for practical applications.展开更多
文摘传统的城市开发模式集中体现为不透水面积的增加,以及＂排水管沟＂加处理＂终端＂的高效城市排水系统。这种模式对环境与生态造成了极大影响,集中体现在：第一,破坏场地自然水循环,增加了地表水量以及径流量;第二,影响地表水水质;第三,影响地下水水质和水量;第四,影响河流的自然形态;第五,破坏水生栖息地;第六,改变地方的能量平衡与微气候（Schueler T.,1994;Kent B.Barnes,John M.Morgan III,and Martin C.Roberge,2001;Christine Anne Zimmer,2006）。
基金supported by the National Key R&D Program of China(2017YFA0207800)the National Natural Science Foundation of China(21574004)+4 种基金the National Natural Science Funds for Distinguished Young Scholar(21725401)the 111 project(B14009)the Fundamental Research Funds for the Central Universitiesthe National “Young Thousand Talents Program”the China Postdoctoral Science Foundation(2017M620012)
文摘Nanocomposite fibers have attracted intensive attentions owing to their promising applications in various fields. However, the fabrication of nanocomposite fibers with super toughness and strong strength under mild conditions remains a great challenge. Here we present a facile flow-induced assembly strategy for the development of super-tough and strong nanocomposite fibers with highly ordered carbon nanotubes (CNTs), which can be induced by directional and fast flow on a grooved hydrogel surface. The prepared nanocomposite fibers show excellent mechanical properties, with a tensile strength up to 643±27 MPa and toughness as high as 77.3±3.4 MJ m^-3 at ultimate strain of 14.8±1.5%. This versatile and efficient flow-induced alignment strategy represents a promising direction for the development of high-performance nanocomposites for practical applications.
