纳米TiO2改性无溶剂聚氨酯的成膜性能研究  

Study on film properties of solvent-free polyurethane modified by nano-TiO2

作　　者：吕斌 程坤[1,2] 徐欣欣 赵舜华[3] 马建中 马养民 LV Bin;CHENG Kun;XU Xinxin;ZHAO Shunhua;MA Jianzhong;MA Yangmin(Jiaxing Hexin Chemical Industry Co.,Ltd.,Jiaxing 314001,China;National Demonstration Center for Experimental Light Chemistry Engineering Education,Shaanxi University of Science & Technology,Xi'an 710021,China;College of Chemistry and Chemical Engineering,Shaanxi University of Science & Technology,Xi'an 710021,China)

机构地区：[1]陕西科技大学轻工科学与工程学院,陕西西安710021 [2]轻化工程国家级实验教学示范中心(陕西科技大学),陕西西安710021 [3]嘉兴禾欣化学工业有限公司,浙江嘉兴314001 [4]陕西科技大学化学与化工学院,陕西西安710021

出　　处：《中国皮革》2019年第7期36-42,共7页China Leather

基　　金：陕西省重点研发计划(2017GY-187);陕西省教育厅服务地方专项计划项目(17JF002)

摘　　要：以聚醚多元醇和端NCO基聚氨酯预聚体为原料,纳米TiO2为改性剂,采用单原位聚合法制备了系列无溶剂型聚氨酯/纳米TiO2(SFPU/TiO2)复合薄膜.以薄膜的机械性能、卫生性能和热稳定性为指标,考察纳米TiO2的引入方式、用量等因素对复合薄膜性能的影响.结果表明:将0.5%的纳米TiO2引入聚醚多元醇,不仅在薄膜中分布均匀,且其力学性能有明显增强,抗张强度为3.45 MPa,断裂伸长率为447.238%.最后将复合薄膜涂布于超纤基布上制备了合成革,结果表明:相比于未添加纳米TiO2的合成革,SFPU/TiO2合成革的卫生性能和力学性能都显著提升.The solvent-free polyuretliane/nano-TiO2 composite film ( SFPU /nano-TiO2) was prepared by singlein -situ polymerization method using polyether glycol and NCO-terminated polyurethane prepolymer as raw materials and nano-TiO2 as modifier. The effects of the nano-TiO2 amount and its introduction method to SFPU/nano-TiO2 film on the composite film were discussed using the mechanical properties, hygienic properties and thermal stability of the composite film as index. The results show that when the nano-TiO2 amount is 0.5%, it is introduced into the polyether glycol, which not only distributes evenly in the polyurethane coating, l)ut also improves the mechanical properties of the film. The tensile strength is 3. 450 MPa, the elongation at break is 447. 238%. The composite film was coated on the ultrafine base fabric to prepare synthetic leather. The results indicate that the sanitary and mechanical properties of SFPU/ TiOn synthetic leather are improved compared with that of the synthetic leather without adding nano-TiO2.

关 键 词：无溶剂聚氨酯 纳米TIO2 透水汽性 卫生性能 力学性能 

分 类 号：TS56[轻工技术与工程—皮革化学与工程]