摘要
基于氯硅烷与羟基的反应性,用氯硅烷对蒙脱土进行化学改性,FTIR证实硅烷已接枝到了蒙脱土上,WAXD表明,在极性分散剂中,硅烷成功地插层到了蒙脱土的片层间;而在非极性分散剂中,硅烷插层到蒙脱土片层间的量少,测定了蒙脱土阳离子交换容量(CEC),改性后其CEC值大幅度降低,分散性实验表明,由于改性后的蒙脱土颗粒以及片层间的相互作用力得到极大降低,其在水中和甲苯中的分散性更好。
Montmorillonite(MMT) was modified by chlorosilane derivatives (trimethylchlorosilane and tert-butyldimethylchlorosilane) based on the reaction between OH group and chlorosilane. FTIR confirmed that chlorosilane derivatives had reacted with the OH groups of MMT, and the results of wide angle X-ray diffraction (WAXD) indicated that there was an intercalation taking place during the reaction. The CEC of montmorillonites were detected, after the modification by chlorosilane derivatives, CEC values drastically decreased. The dispersibility measurements of montmorillonites were conducted, the results declared that the dispersibility of modified montmorillonites both in H2O and toluene were improved due to the decrease of attractions between particles and layers.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2003年第5期928-931,共4页
Chemical Journal of Chinese Universities
