有机累托石的制备及在水性聚氨酯涂料中的防沉降作用  

Characterization and Preparation of Organic Rectorite and Its Anti-sedimentation in Waterborne Polyurethane Coatings

作　　者：汤中道[1,2] 刘惠芳[3] 王洪权[2] 刘燕[2] 

机构地区：[1]中国地质大学教育部纳米矿物材料及应用工程研究中心,武汉430074 [2]中国地质大学材料科学与化学工程学院,武汉430074 [3]中国地质大学地质过程与矿产资源国家重点实验室,武汉430074

出　　处：《地质科技情报》2010年第6期128-131,共4页Geological Science and Technology Information

基　　金：国家自然科学基金项目(40872040)

摘　　要：用十六烷基三甲基溴化铵作为柱化剂制备的有机累托石,以聚醚二元醇、甲苯-2,4-二异氰酸酯、2,2-二羟甲基丙酸为基本原料,采用原位聚合法制备了有机累托石/水性聚氨酯乳液。考察了乳液中有机累托石加入的质量分数对水性聚氨酯涂料防沉降性能和触变性能的影响,并对有机累托石和乳胶膜进行了结构表征。结果表明,当乳液中有机累托石加入的质量分数为3%时,水性聚氨酯涂料的防沉降性能与触变性能得到显著提高。FTIR和TG-DSC分析显示柱化剂进入了累托石层间。XRD分析表明累托石有机化前后的d001由2.438 nm增至3.562 nm。Organic rectorite/waterborne polyurethane emulsions were prepared by means of in-situ polymerization from organic rectorite modified with cetyltrimethylammonium bromide as a pillaring agent,polypropylene glycol,toluene 2,4-diisocyanate,2,2-dimethylol propionic acid.The effect of organic rectorite amount in emulsion on anti-sedimentation and thixotropy of water-based polyurethane coatings was investigated and the structure of organic rectorite and emulsion films were characterized.The results indicated that when the amount of organic rectorite in the emulsion was 3wt%,the anti-sediment and thixotropic performance of water-based polyurethane coatings was obviously improved.FTIR and TG-DSC analysis exhibited that the pillaring agent entered into rectories layer.XRD analysis showed that the d001 of organic rectorite around from 2.438 nm to 3.562 nm,organic rectorite in emulsion was intercalated with polymer and dispersed in the waterborne polyurethane matrix.

关 键 词：水性聚氨酯 有机累托石 原位聚合 防沉降 涂料 

分 类 号：O648.23[理学—物理化学]