【作者】 雷金凤； 彭建根； 张美洲； 李德富； 林炜； 穆畅道；

【Author】 LEI Jin-feng;PENG Jian-gen;ZHANG Mei-zhou;LI De-fu;LIN Wei;MU Chang-dao;College of Chemical Engineering,Sichuan University;National Engineering Laboratory for Clean Technology of Leather Manufacture,Sichuan University;

【机构】 四川大学化学工程学院； 四川大学制革清洁技术国家工程实验室；

【摘要】 以过氧钛酸水溶液为前驱体,在100℃下回流4h,制备了透明的Fe³⁺掺杂纳米二氧化钛（TiO₂）溶胶,可见光下的催化性能测试表明Fe³⁺的最佳掺杂浓度为0.1%。将掺杂后的纳米TiO₂溶胶与水性聚氨酯乳液共混制备了Fe³⁺掺杂纳米TiO₂改性水性聚氨酯复合膜。SEM、UV-Vis、TG对复合膜的测试表明,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,当添加量为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,Fe³⁺掺杂纳米TiO₂的添加使得水性聚氨酯膜具有光催化自清洁能力。更多还原

【Abstract】 The transparent nano Fe³⁺ doped TiO₂ sol was prepared by refluxing peroxo titanic acid aqueous solution as precursor at 100 ℃ for 4h.The photocatalytic performance test under visible light showed that the optimal concentration of Fe³⁺ was 0.1%.Then the waterborne polyurethane composite films modified with the Fe³⁺ doped TiO₂ nanoparticles were 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 nanoparticles were evenly dispersed in the composite films,and good UV absorption ability was given to the waterborne polyurethane.Mechanical properties test indicated that the tensile strength of the composite films was obviously improved,and it was improved by 13%comparing to the pure waterborne polyurethane films when the dosage of TiO₂ was 1%.Removal of methylene blue（MB）under visible light irradiation of composite films showed that the addition of nano Fe³⁺ doped TiO₂ made the waterborne polyurethane have the self-cleaning ability.更多还原