光催化自清洁纺织品的制备及其性能

Preparation and properties of photo-catalytic self-cleaning coated fabrics

为开发耐久性光催化自清洁纺织品,以聚偏氟乙烯(PVDF)与纳米TiO_2为原料,对涤纶织物进行涂层加工,制得具有光催化自清洁性能的纺织品。借助DigiEye数码图像测色系统、扫描电子显微镜和能谱仪等对涂层织物的自清洁性能、自清洁涂层的耐磨性能以及自清洁涂层的耐老化性能进行测试。结果表明:随着纳米TiO_2质量分数的增加,涂层织物的自清洁效果增强,但涂层浆的流变性变差,自清洁涂层的均匀性降低,PVDF对纳米TiO_2颗粒的黏合效果降低,自清洁涂层的耐磨性能下降,自清洁涂层的耐老化性能也逐渐下降;在纳米TiO_2质量分数为33.3%时,涂层浆流变性较好,自清洁涂层均匀性较好,涂层织物自清洁性能较好,且自清洁涂层的耐磨性能和耐老化性能较好。

Polyvinylidene fluoride（PVDF） resin and nano-TiO2 were used to treat polyester fabric as raw materials to prepare the durable textiles with the photo-catalytic self-cleaning properties.The selfcleaning properties of the coated fabric,the abrasion resistance of the self-cleaning coating and the aging resistance of the self-cleaning coating were tested by digital image colorimetric system,scanning electron microscopy and energy dispersive spectrometer.Results reveal that with the increase of the amount of TiO2,the self-cleaning effect of coated fabric is enhanced,but the rheological property of the coating pulp is deteriorated,the integrity of the self-cleaning coat is reduced,the bonding effect of PVDF to TiO2 is reduced,the abrasion resistance coating effect and aging resistance of self-cleaning coating are deteriorated.When the dosage of TiO2 is 33.3%,the rheological property of the coating pulp is better,the self-cleaning coat is even,the self-cleaning properties,the aging resistance and the abrasion resistance of the self-cleaning coating are also better.