异氰酸酯改性蒙脱土的制备与表征  

Preparation and Characterization of Isocyanate Modified Montmorillonite

作　　者：赖登旺[1,2] 李笃信[1] 廖进彬[2] 杨军[2] 杨金[2] 

机构地区：[1]中南大学粉末冶金国家重点实验室,湖南长沙410083 [2]株洲时代新材料科技股份有限公司,湖南株洲412007

出　　处：《塑料工业》2014年第5期90-93,98,共5页China Plastics Industry

摘　　要：通过二苯基甲烷-4,4’-二异氰酸酯（MDI）改性酸化的钠基蒙脱土（Na-MMT）,制得MDI-MMT,再利用MDI-MMT分别与水和乙醇反应,制备H2O-MDI-MMT和C2H5OH-MDI-MMT.利用十八烷基三甲基氯化铵（OTAC）改性的MMT和OTAC、MDI复配改性MMT,分别制得OTAC-MMT和OTAC-MDI-MMT.采用电感耦合等离子体发射光谱（ICP-OES）、FTIR、TG、XRD和SEM对改性MMT进行了表征.结果表明,MDI改性MMT对其层间阳离子含量不产生影响,且MDI-MMT、H2O-MDI-MMT和C2H5OH-MDI-MMT的层间距变化不大,保持在1.33 ～1.44 nm之间.OTAC改性MMT层间距得到了较大的改善,层间距在2.03 ～4.43 nm范围内,而OTAC、MDI复配改性MMT的层间距得到了进一步扩大,最大达到了15.98 nm,实现了充分剥离.MDI-MMT which was obtained by diphenylmethane 4,4＇-diisocyanate （MDI） modifying with acidified Na-montmorillonite （Na-MMT）,then reacted with water and ethanol respectively to prepare H2O-MDI-MMT and C2H5OH-MDI-MMT.OTAC-MMT and OTAC-MDI-MMT were made respectively of MMT modified by octadecyl trimethyl ammonium chloride （OTAC） and compound of OTAC and MDI.Modified MMT were characterized by inductively coupled plasma optical emission spectrometry （ICP-OES）,FTIR,TG,XRD and SEM.The results showed that：MDI modifying MMT did not affect the contents of interlayer cation,and the interlayer space of MDI-MMT,H2O-MDI-MMT and C2H5OH-MDI-MMT kept between 1.33 ～ 1.44 nm,the changes were small,however,the interlayer spacing of OTAC-MMT was improved greatly,which was within 2.03 ～ 4.43 nm,and the one of OTAC-MDI-MMT was further expanded,the largest was 15.98 nm that had achieved fully exfoliation.

关 键 词：异氰酸酯 蒙脱土 改性 

分 类 号：TQ320.4[化学工程—合成树脂塑料工业]