Grafting of PEG onto lanthanum hydroxide nanowires
Grafting of PEG onto lanthanum hydroxide nanowires
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将 PEG 接枝到氢氧化镧纳米线上
DOI：
10.1016/j.matlet.2008.05.061
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发表时间：
2008-09-30
影响因子：
3
通讯作者：
Li, Zhaolong
中科院分区：
文献类型：
--
作者：
Kuang, Jinming;Yuan, Jinying;Li, Zhaolong
采用水热法合成了氢氧化镧纳米线。为了减少氢氧化镧纳米线之间的团聚，提出了一种有效的表面改性方法，即在氢氧化镧纳米线上接枝聚乙二醇（PEG）。即首先用硅烷偶联剂氨丙基三甲氧基硅烷（APTMS）对氢氧化镧纳米线进行表面处理，在氢氧化镧纳米线表面引入功能性氨基，然后与PEG-COCl进行接枝反应。采用傅里叶变换红外光谱（FT-IR）、热重分析（TGA）和透射电子显微镜（TEM）对所得纳米复合材料进行了表征。红外光谱和热重分析结果表明，PEG链已共价键合到氢氧化镧纳米线的表面。结果表明，随着PEG分子量的增加，接枝率增加，从而促进了接枝率的提高。(c)2008 Elsevier B. V.保留所有权利。
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.