The influence of water on the intercalation of epoxy monomers in Na-montmorillonite

被引：22

作者：

Bongicivanni, R ^{[1
]}

Mazza, D ^{[1
]}

Ronchetti, S ^{[1
]}

Turcato, EA ^{[1
]}

机构：

[1] Politecn Torino, Dipartimento Sci Mat & Ingn Chim, I-10129 Turin, Italy

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2006年 / 296卷 / 02期

关键词：

intercalation; montmorillonite; epoxy monomer; UV-curing; molecular simulation; water content; hydrated clay;

D O I：

10.1016/j.jcis.2005.09.058

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The intercalation of a typical UV-curable epoxy monomer (CE) in unmodified montmorillonite and the effect of hydration on the intercalation reaction are studied. Montmorillonite in the sodium form was submitted to a controlled hydration/dehydration cycle and the water content was checked by TGA/XRD analyses. The structure of the hydrated Na+-montmorillonite was determined from the values of the basal spacings and from the water content of the hydrated form: a coordination of four water molecules per Na ion was found, corresponding to a minimum of energy calculated by molecular dynamics simulation. When dispersing the clay in the CE monomer, the anhydrous Na+-montmorillonite did not show any intercalation; on the contrary the hydrated form showed an increase of the basal spacing. A possible mechanism to explain the intercalation of the CE monomers is proposed. (c) 2005 Elsevier Inc. All rights reserved.

引用

页码：515 / 519

页数：5

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