Fe^(3+)掺杂纳米TiO_2改性水性聚氨酯的制备及性能研究  

Preparation and Properties of Waterborne Polyurethane Modified with Nano Fe^(3+) Doped TiO_2

作　　者：彭健根 张美洲 王尚[1] 李德富[1] 林炜[2] 穆畅道[1] 

机构地区：[1]四川大学化学工程学院,四川成都610065 [2]四川大学制革清洁技术国家工程实验室,四川成都610065

出　　处：《皮革科学与工程》2016年第1期15-21,共7页Leather Science and Engineering

基　　金：国家自然科学基金(项目号:21276166);国家高技术研究发展计划(863计划)项目(项目号:2013AA06A306)

摘　　要：以过氧钛酸水溶液为前驱体,在100℃下回流4 h,制备了透明的Fe^(3+)掺杂纳米二氧化钛(TiO_2)溶胶,可见光下的催化性能测试表明Fe^(3+)的最佳掺杂浓度为0.1%。将该掺杂浓度的纳米TiO_2溶胶与水性聚氨酯乳液通过简单共混制备了Fe3+掺杂纳米TiO_2改性水性聚氨酯复合膜。采用SEM、UV-Vis、TG等测试方法对复合膜进行表征,结果表明,纳米粒子均匀分散于复合膜中,并赋予了水性聚氨酯良好的紫外吸收能力。机械性能测试表明复合膜的抗张强度得到明显提高,并且在添加量为1%时达到最强(43 MPa),相对增强了13%。可见光下复合膜对亚甲基蓝(MB)的去除实验表明,Fe^(3+)掺杂纳米TiO_2的添加使得水性聚氨酯膜具有光催化自清洁能力。The transparent nano Fe3＋ doped TiO2 sol was prepared by refluxing peroxo titanic acid aqueous solution as precursor 100 ℃ for 4h. Under the visible light photocatalytic performance test showed that the optimal concentration of Fe3＋ was 0,1%. Then the waterborne polyurethane composite films modified with the Fe3＋ doped TiO2 nanopartieles was prepared by. simple blending of waterborne polyurethane emulsion and nano Fe3＋ doped TiO2 sol. The composite films were characterized by SEM, UV-Vis and TG. The results showed that the nano particles were evenly dispersed in the composite films, and good UV absorption ability was given to the waterborne polyurethane. Mechanical properties testing indicated that the tensile strength of the composite films was, obviously improved, and the maximum amount of the composite films was 13% when the dosage was 1%. Removal of methylene blue （MB） under visible light irradiation of composite films showed that the adflition of nano Fe3＋ doped TiO2 maizes the waterborne polyurethane have the self-cleaning ability.

关 键 词：Fe3+掺杂 纳米TIO2 水性聚氨酯 光催化性能 自清洁性能 

分 类 号：TS529.5[轻工技术与工程—皮革化学与工程]