一种碳纳米管-聚氨酯复合调光薄膜及其制备方法

本发明涉及一种碳纳米管-聚氨酯复合调光薄膜及其制备方法。该复合调光薄膜以碳纳米管自支撑薄膜和形状记忆聚氨酯为主要成分,以电驱动方式实现对薄膜中聚氨酯层分子级结构的相转变及透明性的可逆调制。这种智能薄膜材料可在全透明和磨砂调光之间通过控制电压信号不同而自由转换。同时,通过某些颜料的加入,可得到相应彩色的调光薄膜。该技术易于规模化,有望成为一种新型调光玻璃的加工方法,具有产品结构简单、成本低廉、经久耐用,阈值电压低,安全性高的优势,可广泛应用于汽车、建筑装饰材料中,亦可发展成为一种新型柔性智能透明导电薄膜,为智能器件开发奠定材料基础

挤扩支盘桩试验研究进展

在挤扩支盘桩越来越受到重视的背景下，综述了挤扩支盘桩的试验研究进展。介绍了实物试验和数值试验两类方法的研究现状，并深入分析了两类方法的优缺点。最后提出实物试验与数值模拟两种方法相结合，形成优势互补，是目前高效开展挤扩支盘桩研究的一种切实可行的方法

Multifunctionalization of carbon nanotube fibers with the aid of graphene wrapping

<p>Carbon nanotube (CNT) fibers are promising candidates for developing multifunctional textiles. The direct introduction of functional guests within or around CNT fibers meets problems due to the rough fiber surface and weak interfacial bindings. To improve the functionality and performance stability, we report a new method to modify the surface roughness and level of functionalization of CNT fibers, by wrapping graphene oxide (GO) or reduced graphene (RG) around them. Besides the functional groups on the graphene sheets, the introduction of a graphene layer also has smoothing and shield effects, resulting in higher tensile strength and improved and stabilized performance. The electrochemical and photocurrent applications were exploited by depositing polyaniline around GO-wrapped CNT fibers and TiO_{<font size="2">2</font>} around RG-wrapped fibers, with a capacitance up to 229.5 F cm^{<font size="2">&minus;3</font>} and a photocurrent density of 132 &mu;A cm^{<font size="2">&minus;2</font>}, respectively. The present technique has the advantage that the mechanical and functional properties can be optimized by simply modifying the core CNT fiber <em>via</em> polymer infiltration during the fiber spinning.</p><br /