纳米TiO_2晶形对合成革用阴离子水性聚氨酯性能的影响  

Effect of Crystal Nano-TiO_2 on the Performance of Waterborne Negative Ion Polyurethane Used in Synthetic Leather

作　　者：罗晓民[1,2] 吴东秋[2] 杨菲菲[2] 冯见艳[2] 

机构地区：[1]陕西科技大学资源与环境学院,陕西西安710021 [2]陕西科技大学化学与化工学院,陕西西安710021

出　　处：《精细化工》2012年第11期1103-1107,共5页Fine Chemicals

基　　金：浙江省科技厅科技计划项目(2011C31004);陕西教育厅产业化项目(2010JC02);温州大学开放基金资助项目(100061200118)~~

摘　　要：用纳米微粒直接分散法制备了纳米TiO2/水性聚氨酯复合膜,考察了纳米TiO2晶形(金红石型和锐钛矿型)对复合膜性能的影响。黏度分析表明,金红石型纳米TiO2增黏效果较好。粒径、SEM和AFM分析表明,添加纳米TiO2不影响聚氨酯乳液的稳定性,复合粒子仍然以纳米级存在,两种晶形的纳米TiO2均能均匀分散于复合膜中,并对复合膜表面的平整度无影响;接触角和卫生性能测试表明,两种晶形的复合膜都没有防水性,添加锐钛矿型纳米TiO2复合膜的卫生性能较好;机械性能和抗菌性测试表明,添加锐钛矿型纳米TiO2的复合膜具有更好的力学性能和抗菌性能。Nano-TiOJWPU composite membrane was prepared by directly dispersing nano-particles. Meanwhile,the effect of crystal nano-TiO2 （rutile and anatase type ） on the performance of the composite membrane was investigated. The analysis of viscosity shows that the rutile type had better effect on the increase of viscosity. The analyses of grain diameter, SEM and AFM show that the stability of polyurethane-emulsion was not affected by the addition of nano-TiO2, and the composite particles still existed as nanoscale ones. Besides, both types of rutile and anatase nano-TiO2 dispersed uniformly in the composite film and had no effect on its flatness. The tests of contact angle and hygiene performance indicate that the composite film made of both types of crystal nano-TiO2 had no water-proof properties, and that the one into which anatase type was added had better hygiene function. The mechanical and anti-bacterial tests manifest that the one with the addition of anatase type had better mechanical and anti-bacterial properties.

关 键 词：纳米TIO2 晶形 水性聚氨酯 复合膜 皮革化学品 

分 类 号：TQ630.6[化学工程—精细化工]