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[1]袁永兵,陈洪龄,王小曼.煅烧高岭土表面有机改性及在有机溶剂中的分散性能[J].南京工业大学学报(自然科学版),2014,36(02):21-27.[doi:10.3969/j.issn.1671-7627.2014.02.004]
 YUAN Yongbing,CHEN Hongling,WANG Xiaoman.Organic modification of calcined kaolin surface and dispersion properties in several organic solvents[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2014,36(02):21-27.[doi:10.3969/j.issn.1671-7627.2014.02.004]
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煅烧高岭土表面有机改性及在有机溶剂中的分散性能()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
36
期数:
2014年02期
页码:
21-27
栏目:
出版日期:
2014-03-30

文章信息/Info

Title:
Organic modification of calcined kaolin surface and dispersion properties in several organic solvents
文章编号:
1671-7627(2014)02-0021-07
作者:
袁永兵陈洪龄王小曼
南京工业大学 化学化工学院,江苏 南京 210009
Author(s):
YUAN YongbingCHEN HonglingWANG Xiaoman
College of Chemistry and Chemical Engineering,Nanjing Tech University,Nanjing 210009,China
关键词:
煅烧高岭土 表面改性 硅烷偶联剂 分散性能
Keywords:
calcined kaolin surface modification silane coupling agent dispersion properties
分类号:
O611
DOI:
10.3969/j.issn.1671-7627.2014.02.004
文献标志码:
A
摘要:
利用乙烯基三乙氧基硅烷(VTEOS)以及十二胺和3-缩水甘油醚氧丙基三甲氧基硅烷(GPS)制备的改性剂对煅烧高岭土表面进行化学改性,并通过傅里叶红外光谱仪(FT-IR)、热分析仪(TGA)、静态接触角(CA)、透射电子显微镜(TEM)等对样品进行表征。结果表明:VTEOS在煅烧高岭土颗粒表面成功进行硅烷化反应,十二胺与GPS合成的改性剂对硅烷化的改性颗粒随之实现化学接枝; VTEOS用量对最终改性产物的接枝量及亲疏水性能有直接影响; 随着VTEOS用量的增加,终产物表面接枝的改性剂基团也逐渐增多,最大热烧失量约为14.31%; 但是颗粒疏水性未持续增强,接触角最大值约为147°,最小值约为127°; VTEOS与高岭土质量相当时制备的最终改性产物在不同极性有机溶剂如乙醇、丙酮、二甲苯和环己烷中都能均一分散,未出现明显的团聚现象,平均粒径分别为1.08、1.71、1.34及1.85 μm。
Abstract:
Calcined kaolin particle surface was modified with vinyltriethoxysilane(VTEOS)and modifier synthesized with dodecylamine and 3-glycidoxypropyltrimethoxysilane(GPS).The blank and modified kaolin particles were characterized by Fourier transform infrared spectroscopy(FT-IR),thermal analysis(TGA),static contact angle(CA),and transmission electron microscopy(TEM).Results indicated that VTEOS and the modifier synthesized with dodecylamine and GPS were successfully grafted on the surface of calcined kaolin particle via stepwise method,and the dosage of VTEOS had a direct and significant influence on the grafting ratio and hydrophobic properties of the final products.The quantity of grafting groups anchored on final products increased with the increasing of VTEOS,and the maximum mass loss was 14.31%.However,the hydrophobic properties of final products were not be enhanced continuously,and the maximum and minimum CA values were 147° and 127°, respectively.The appropriate grafting density was fixed when the mass ratio of kaolin to VTEOS was 1:1.Uniform and stable dispersions of the resultant products were achieved in several organic solvents of different polarities, such as ethanol,acetone,xylene and cyclohexane,and the mean particle diameters were 1.08,1.71,1.34 and 1.85 μm, respectively.

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备注/Memo

备注/Memo:
收稿日期:2013-08-28
作者简介:袁永兵(1985—),男,河南平顶山人,博士生,主要研究方向为黏土表面改性及其应用; 陈洪龄(联系人),教授,E-mail: hlchen@njtech.edu.cn..
更新日期/Last Update: 2014-03-20