Grafting of PEG onto lanthanum hydroxide nanowires

被引：14

作者：

Kuang, Jinming ^{[1
]}

Yuan, Jinying ^{[1
]}

Zhou, Mi ^{[1
]}

Yuan, Weizhong ^{[1
]}

Sui, Xiaofeng ^{[1
]}

Li, Zhaolong ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Chem, Minist Educ, Key Lab Organ Optoelect & Mol Engn, Beijing 100084, Peoples R China

来源：

MATERIALS LETTERS | 2008年 / 62卷 / 25期

基金：

中国国家自然科学基金;

关键词：

lanthanum hydroxide; nanowires; graft onto;

D O I：

10.1016/j.matlet.2008.05.061

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Lanthanum hydroxide nanowires were synthesized by hydrothermal method. To reduce the aggregation among lanthanum hydroxide nanowires, an effective surface modification method was proposed by grafting polyethylene glycol (PEG) onto lanthanum hydroxide nanowires. That is, the surface of lanthanum hydroxide nanowires was firstly treated with aminopropyltrimethoxysilane (APTMS), which is a silane coupling agent and introduces functional amino group onto the surface of lanthanum hydroxide nanowires, followed by grafting reaction with PEG-COCl. The obtained nanocomposite was characterized by Fourier Transform Infrared Spectroscopy (FT-IR), thermogravimetric analysis (TGA), and transmission electron microscopy (TEM). Results of FT-IR and TGA showed that the PEG chains had been covalently bonded to the surface of lanthanum hydroxide nanowires. It was found that the increase of molecular weight of the grafted PEG could increase the grafting percentage and hence promote the dispersibility. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：4078 / 4080

页数：3

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