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文献题目：Gold-nanoparticle-decorated thermoplastic polyurethane electrospun fibers prepared through a chitosan linkage for catalytic applications
作者：Hui-Hui Cheng, Fang Chen, Jian Yu, Zhao-Xia Guo
刊物名称：Journal of Applied Polymer Science
Abstract
Thermoplastic polyurethane (TPU)-electrospun-fiber-mat-supported gold catalysts were prepared by the adsorption of gold nanoparticles (AuNPs) onto a TPU electrospun fiber mat after functionalization with chitosan (CS) by a dip-coating method. The mechanism for the adsorption of AuNPs was electrostatic interaction between the positive charge of CS (—NH3+ ) and the negative charge of the AuNP surface (—COO-) and coordination between the amine groups of CS and gold. The mat was crosslinked with glutaraldehyde vapor to strengthen the adhesion between the CS coating and TPU fibers after the adsorption of AuNPs. The catalytic activity of the supported gold catalyst was evaluated with the reduction of 4-nitrophenol by NaBH4 to demonstrate the excellent catalytic performance and its reusability for at least 10 cycles without a loss in activity. The rate constant increased with both an increase in the amount of supported catalyst and an increase in the ratio of the mat surface area to AuNP within the investigated scope.
上线时间：5 Aug 2016
评论：清华大学郭朝霞课题组利用ucalery静电纺丝设备开发了一种负载金纳米颗粒的静电纺丝TPU材料。该TPU材料由壳聚糖作为前驱体所得，其中的氨基正离子和活化后金纳米颗粒表面的羧基负离子，通过静电力作用结合。然后通过戊二醛蒸汽交联强化粒子与基材的连接。该纳米颗粒负载材料在NaBH4还原4-硝基苯酚的反应中显示出优良的催化性能。并可在不损失催化活性的情况下，重复使用多达10次。同时，催化效率可调节，在提高负载粒子数量，或者纤维毡表面积与金纳米颗粒比情况下，反应速率常数有所提高。
作者简介：郭朝霞，女，清华大学教授。于1986年毕业于天津大学，获得高分子化工学士学位。1988年于法国约瑟夫傅里叶大学获得物理有机化学硕士学位。1991年于法国格勒诺布尔国立理工学院获得材料学博士学位。之后分别于1992年和1996年，先后在英国东英格利亚大学进行两期博士后研究。于2000年回国在清华大学进行博士后研究，2002年留校任教至今。其研究领域包括无机纳米粒子和聚合物的复合材料研究，树枝状高分子，以及聚合物纳米材料。
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