基于浸染工艺的纳米TiO2负载涤纶织物的制备及性能研究

发布时间：2018-05-28 19:06

  本文选题：纳米TiO_2 + 涤纶织物　； 参考：《天津工业大学》2017年硕士论文

【摘要】：本文首先采用浸染法将不同粒径的纳米TiO_2负载于涤纶纤维表面制备纳米TiO_2负载涤纶织物,在使用多种分析技术对其进行表征的基础上,将其作为光催化剂应用于偶氮染料的光催化降解反应中,重点考察了浸染工艺中纳米TiO_2水分散液浓度、浴比、负载温度和时间、工作液pH值、无机盐以及纳米TiO_2粒径等因素对纳米TiO_2在涤纶织物表面负载量及其催化活性的影响。并将浸染法所制备纳米TiO_2负载涤纶织物与浸轧法制备的纳米TiO_2负载涤纶织物进行比较,重点考察了两者的光催化活性的耐久性。然后通过两步法和一浴法分别制备两种纳米TiO_2负载染色涤纶织物,主要研究了两种工艺对纳米TiO_2负载染色涤纶织物光催化活性和颜色特征的影响。最后将浸染法制备纳米TiO_2负载涤纶织物应用于室内空气中甲醛的光催化降解反应中,评估了其在不同辐射光条件下对甲醛的去除效率。实验结果表明,通过浸染法工艺能够使不同粒径纳米TiO_2牢固地负载于涤纶纤维表面。在此负载工艺中提高纳米TiO_2水分散液浓度和浴比能够显著增加纳米TiO_2的负载量,并且只有负载温度达到130℃时涤纶纤维才能获得较高的纳米TiO_2负载量,此外降低工作液pH值有利于纳米TiO_2的负载。特别需要指出的是,尽管在工作液中添加NaCl、Na2SO4或NaNO3等无机盐都能够显著提高纳米TiO_2在涤纶纤维表面的负载量,但是所制备的纳米TiO_2负载涤纶织物却表现出不同的光催化活性。此外,尽管使用浸染法所制备纳米TiO_2负载涤纶织物的光催化活性略低于浸轧法制备的纳米TiO_2负载涤纶织物,但是却显示出更好的耐久性。使用浸染法能够实现涤纶织物的分散染料染色和纳米Ti02负载的一浴化处理,但是在涤纶纤维表面的分散染料和纳米TiO_2之间存在着相互作用。纳米TiO_2负载涤纶织物能够光催化降解室内空气中的甲醛,纳米TiO_2负载量的提高和紫外光辐射的引入能够显著提高纳米TiO_2负载涤纶织物对空气中甲醛的光催化降解效果。
[Abstract]:In this paper, nanometer TiO_2 loaded polyester fabric was prepared by impregnating different particle size nanometer TiO_2 onto polyester fiber surface, and it was characterized by various analytical techniques. It was used as photocatalyst in the photocatalytic degradation of azo dyes. The concentration, bath ratio, loading temperature and time, pH value of the working solution were investigated. The effects of inorganic salts and nanometer TiO_2 particle size on the loading amount and catalytic activity of nano TiO_2 on the surface of polyester fabric were investigated. The durability of nano TiO_2 supported polyester fabric prepared by impregnation method was compared with that of nano TiO_2 supported polyester fabric prepared by impregnation and rolling process. Then two kinds of nanosized TiO_2 supported dyeing polyester fabrics were prepared by two-step method and one-bath method respectively. The effects of two processes on the photocatalytic activity and color characteristics of nano-TiO_2 supported dyeing polyester fabric were studied. Finally, Nano-sized TiO_2 supported polyester fabric was prepared by impregnation method and applied to the photocatalytic degradation of formaldehyde in indoor air, and the removal efficiency of formaldehyde was evaluated under different radiation conditions. The experimental results show that TiO_2 with different diameters can be firmly loaded on the surface of polyester fiber by dipping process. In this loading process, increasing the concentration of water dispersion and bath ratio of nanometer TiO_2 can significantly increase the loading amount of nano TiO_2, and only when the loading temperature reaches 130 鈩，

本文编号：1947837