不同改性方式下纳米凹凸棒石改性效果的比较  

Comparative on Modification Effect on Nano-attapulgite by Different Modifying Methods

作　　者：吴凤芹[1] 张国庆[1] 姚超[1] 李效棠[2] 刘建平[3] 

机构地区：[1]江苏工业学院化工系,江苏常州213164 [2]江苏省凹土工程技术研究中心,江苏盱眙211700 [3]江苏南大紫金科技集团有限公司,江苏常州213016

出　　处：《矿冶工程》2008年第6期90-93,共4页Mining and Metallurgical Engineering

基　　金：国家863项目(2007AA06Z118);江苏省科技攻关(BE2006373);江苏省博士后科研资助计划(0602020B);常州市科技攻关资助项目(CE2007075)

摘　　要：分别利用阳离子表面活性剂(OTAC)、硅烷偶联剂(KH570)以及两者协同对凹凸棒石进行有机改性。采用红外光谱、热分析、分散性实验等对表面改性前后的纳米凹凸棒石进行分析表征。研究了几种改性方式对凹凸棒石改性效果的影响。结果表明,先用OTAC再用KH570改性的凹凸棒石改性效果较佳。分散性实验表明,改性后的凹凸棒石由亲水性变为疏水性,用于甲基乙烯基硅橡胶中可以提高其力学性能。Organic surface modifications on attapulgite were carried out with cationic surfactants（ OTAC）, silicone coupling reagent（KH570） and the combination of the two reagents respectively. The modified attapulgite were characterized by IR, TG-DTA and dispersivity experiments. The effects of different modifying methods on the modification of attapulgite were investigated. The results showed that the modification effect of attapulgite modified first by OTAC and then by KH570 was the best. The surface feature of the modified attapulgite was changed from hydrophilic to hydrophobic. The mechanical properties of methyl-vinyl silicone rubber can be improved by adding the modified attapulgite.

关 键 词：阳离子表面活性剂 硅烷偶联剂 凹凸棒石 有机表面改性 

分 类 号：TQ17[化学工程—硅酸盐工业]