LEI Huili， LIAO Huiwei， HUANG Jinfang， ZHANG Junru， DAI Wen
（School of Materials Science and Engineering， Southwest University of Science and Technology， Mianyang 621010， China）
Abstract：The surface modification of waste rubber powders by sol -gel method with tetraethoxysilane was investigated. The modification effects were characterized by the means of activation indexes, angles of contact, IR, TG and SEM. The modification mechanism was discussed. The results show that when the mass ratio of tetraethoxysilane and waste rubber powders is 1∶2, the reaction time is 6 h, the modification effect is best. A layer of inorganic network structure of SiO2 is generated on the surface of modified waste rubber particles. The contact angle of the modified waste rubber powders with water decreases from 96 to 23° at room temperature, which indicates that the surface of waste rubber powders changes from hydrophobic to hydrophilic.
Keywords: waste tire rubber powder; surface modification; tetraethoxysilane
中图分类号：TQ110.9 文献标志码：A
文章编号：1008-5548（2014）02-0018-04
DOI:10.13732/j.issn.1008-5548.2014.02.004
收稿日期：2013-06-22， 修回日期：2013-07-05，在线出版时间：2014-05-04。
基金项目：国家自然科学基金项目，编号：21201142。
第一作者简介：雷会利（1987—），女，硕士研究生，研究方向为环境废物资源化回收利用。 电话：15881634303，E-mail： 516831011@qq.com。
通信作者简介：廖辉伟（1967—），男，教授，研究方向为低维纳米功能材料及工业废弃物处置与资源化。 E-mail： liaohw6709@163.com。
