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纳米二氧化硅/聚乙二醇杂化材料的制备与表征

发表时间:2009-11-30  浏览量:1376  下载量:557
全部作者: 王玲远,王瑶,唐建国
作者单位: 青岛大学化学与化工学院
摘 要: 利用分步法成功将低分子量聚乙二醇(polyethylene glycol, PEG)接枝到纳米SiO2上,制备了SiO2-PEC复合材料,并用傅里叶变换红外光谱(Fourier transform infra-red, FT-IR)、X射线光电子能谱(X-ray photoelectron spectrum, XPS)、差热分析(differential thermal analysis, DTA)、热重分析(thermo gravimetric analysis, TGA)及透射电镜(transmission electron microscopy, TEM)对其结构、性能及表面形貌进行了表征。在红外光谱图中,复合材料中所含PEG基团中的亚甲基在1 354,1 457和2 870 cm-1出峰。XPS结果也显示复合物中含有亚甲基。由DTA及TGA图可以看出:有机结构在357℃分解,失重率大约为45%,由此推算出接枝率在45%左右。TEM照片显示改性后纳米粒子在乙醇中分散均匀,团聚现象减弱,粒子粒径在30 nm左右。
关 键 词: 复合材料;杂化材料;表面接枝;纳米复合体;杂化材料
Title: Study on preparation and characterization of nano-SiO2 PEC/hybrid materia
Author: WANG Lingyuan, WANG Yao, TANG Jianguo
Organization: Department of Materials Science and Engineering, Qingdao University
Abstract: In this paper, low-molecular-weight polyethylene glycol (PEG) was grafted onto the surface of nano-silica particles by a two-step process. The composite structure was characterized by (Fourier transfrom infra-red, FT-IR) spectroscopy, X-ray photoelectron spectrum (XPS), differential thermal analysis (DTA), thermogravimetry analysis (TGA) and transmission electron microscope (TEM). The peaks for methylene group of PEG appeared at 1 354, 1 457 and 2 870 cm-1 in FI-IR. The XPS result also indicated that the —CH2— structure existed in the composites. As showed in the DTA and TGA figures, the organic structure decomposed at 357℃ and lost about 45% weight. So it can be calculated that the grafting percentage is about 45%.
Key words: composite material; hybrid materials; surface grafting; nano-composite; hybrid materials
发表期数: 2009年11月第22期
引用格式: 王玲远,王瑶,唐建国. 纳米二氧化硅/聚乙二醇杂化材料的制备与表征[J]. 中国科技论文在线精品论文,2009,2(22):2390-2394.
 
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