中文摘要：

将金红石型和锐钛矿型2种不同TiO2的水分散液及其相应的聚丙烯酸丁酯复合胶乳应用于棉织物的功能整理,通过考察紫外线照射下整理织物的老化、杀菌和紫外屏蔽性能,研究整理织物表面不同晶型TiO2对紫外线的响应机制及其对整理织物性能的影响。实验结果表明,2种晶型TiO2均具有较强的紫外屏蔽作用,金红石型TiO2还表现出较强的抗老化作用和较弱的杀菌作用,而锐钛矿型TiO2在提供强杀菌作用的同时反而会显著加速整理棉织物的老化脆损。认为金红石型TiO2对紫外线主要表现为吸收和漫反射作用,锐钛矿型TiO2具有强烈的光催化效应,这种效应产生的大量强氧化性自由基会在杀菌的同时加速纤维分子链的断裂,因此,在进行功能整理时应根据需要选取合适晶型的TiO2,并采取适当措施以抑制其中的不利效应。

英文摘要：

Aqueous dispersion of rutile and anatase TiO2 and corresponding poly（butyl acrylate） composite latexes thereof were used to finish cotton fabrics.The aging resistance,ultraviolet resistance and sterilization properties of the finished cotton fabrics under UV-irradiation were measured in order to investigate the response mechanisms of different crystal TiO2 particles to UV-irradiation and their effects on the performances of finished cotton fabrics.It was found that both of the crystals have good ultraviolet resistance,however,rutile TiO2 finished cotton fabric exhibits outstanding aging resistance but weak sterilization properties because of its absorption and diffuse scattering of UV light,while anatase TiO2 finished cotton fabric offers excellent sterilization but accelerates the aging process due to its strong photocatalytic effect which induces many strong oxidizing free radicals under UV-irradiation,that effectively inactivate bacteria and simultaneously accelerate the breakdown of the molecular chain of fibers.Thus,it is required to select the proper crystal of TiO2 for functional finish of fabrics,taking necessary measures to suppress the side effects.