纳米TiO_2改性聚碳酸酯型水性聚氨酯的研究  

Waterborne Polyurethane Modified by Nano-TiO_2

作　　者：赵凤艳[1] 王全杰[1,2] 杨大伟[2] 王少君[1] 

机构地区：[1]大连工业大学化工与材料学院,辽宁大连116034 [2]烟台大学化学生物理工学院,山东烟台264005

出　　处：《中国皮革》2012年第11期12-15,20,共5页China Leather

基　　金：烟台市科学技术发展计划项目(2010250)

摘　　要：试验中以聚碳酸酯二元醇(JSH-10)、异佛尔酮二异氰酸酯(IPDI)、二苯基甲烷二异氰酸酯(MDI)以及二羟甲基丁酸(DMBA)为基本原料,用自乳化法合成了芳香族水性聚氨酯乳液。讨论了纳米TiO_2加入量及加入方式、2种异氰酸酯的用量比对乳液性能及成膜性能的影响。通过热重分析(TG)、X射线衍射(XRD)等方法,测定了聚氨酯膜的耐热性能以及结晶性能等。研究结果表明较佳的合成工艺条件:反应时间为MDI与IPDI复配比为8∶2,纳米TiO_2加入量为2%～4%,且采用粉体合成的方法加入时,可得到乳液性能稳定,成膜性能好,耐黄变性能优良的水性聚氨酯(WPU)乳液。Using the self - emulsifying method the waterborne polyurethane emulsion was synthesized with polyester polyol （ JSH - 10 ） and isophorone diisocyanate （ IPDI）, 4,4＇ - diphenylmethane diisocyanate （MDI） and dimethylbenzanthraeene （ DM- BA） as raw materials. The influence of dosage of nano - TiO2 , the ratio of different diisocyanate on the emulsion properties and the film performance were also discussed. TG and XRD were used to characterize the heat resistance performance and crystalliza- tion properties of the membrane. It show that better synthesis process conditions are as follows： the ratio of MDI and IPDI is 8：2, and the addition amount of nanometer TiO2 is 2%- 4% in the synthesis method of adding powder. Under the above conditions we can get the waterborne polyurethane with stable emulsion performance, film performance, and excellent anti -yellowing performance.

关 键 词：水性聚氨酯乳液 纳米粉体TiO2 合成 性能 耐黄变性能 

分 类 号：TQ317[化学工程—高聚物工业] TS529[轻工技术与工程—皮革化学与工程]