插层-分解法制备联二脲/蒙脱土新型复合材料  

Preparation of a nano-composite LDA/MMT by novel intercalation-decomposition process

作　　者：郭灿雄[1] 张凤霞[1] 吴大鸣[1] 

机构地区：[1]北京化工大学新型高分子材料制备与加工北京市重点实验室,北京100029

出　　处：《北京化工大学学报（自然科学版）》2006年第6期46-50,共5页Journal of Beijing University of Chemical Technology(Natural Science Edition)

基　　金：北京市教委重点学科建设基金(SYS100100420)

摘　　要：以二甲亚砜/水为复合分散剂,通过偶氮二甲酰胺的插层-分解过程,制备出亚肼基二甲酰胺(俗称联二脲)插层蒙脱土新型复合材料。采用XRD、NMR、TG-DTAI、R等手段对新材料进行了表征。结果表明,偶氮二甲酰胺进入了蒙脱土层板间,经分解后以联二脲形式存在;蒙脱土层板间距由1.25 nm增大至1.95 nm;新型复合发泡剂中有机物的质量分数约为16.4%。考察了温度、酸碱性以及复合分散剂中水含量等制备条件对插层效果的影响。当温度为60℃、pH=9且复合分散剂中水含量为10%时,产物的层间距最大,层间有机物的量最多。A novel nano-composite, biurea （LDA） intercalated montmorillonte, was prepared by the novel intercalation-decomposition process of azodicarhonamide （AC） at the presence of mixed dispersant DMSO/H2O. The nano-composite were characterized by means of XRD, solid state NMR, thermal analyses and IR, etc. The interlayer distance of the montmorillonite composite was increased from 1.25 nm to 1.95 nm by the intercalation of AC and subsequent decomposition to LDA. The content of LDA in the composite was ca. 16.4 %. The interaction between LDA and the host layered material was conformed by IR spectra. The effects of various preparation conditions including temperature, pH and water content in mixed dispersant were investigated. The favoi, ite conditions were 60 ℃, pH = 9 and 10 % water in mixed dispersant.

关 键 词：插层-分解 纳米复合材料 联二脲 偶氮二甲酰胺 蒙脱土 

分 类 号：TQ328.9[化学工程—合成树脂塑料工业]