纳米TiO2负载涤纶织物的浸染法制备及光催化性能

Preparation and photocatalytic activity of nano-TiO2 loaded polyester fabric by exhaustion process

使用不同粒径纳米TiO2以高温高压浸染工艺对涤纶织物进行负载加工,重点考察了不同工艺参数对涤纶织物表面纳米TiO2负载量和负载率的影响,研究了纳米TiO2粒径和负载量与其光催化性能之间的关系,比较了浸染法和浸轧法制备纳米TiO2负载织物的耐久性。结果表明,提高工作浴温度、pH值和纳米TiO2质量浓度都能显著提高纳米TiO2负载量和负载率。大粒径纳米TiO2更易于负载涤纶纤维。纳米TiO2的负载量随浴比提高而增大,但其负载率则反之。纳米TiO2负载涤纶织物作为光催化剂能促进染料的氧化降解反应,纳米TiO2负载量的提高可显著促进其光催化活性。采用小粒径纳米TiO2制备负载织物具有更高的光催化活性。浸染工艺制备负载织物的耐久性能优于浸轧工艺。

Polyester fabrics are loaded with d if fere nt sizes of nano-TiO2 by high-temperature-high-pres- sure exhaustion process. Several process factors affecting the loading amount and efficiency of nano- TiO2 on polyester fabric are investigated. The relationship between size or loading amount of nano-TiO2 and its photocatalytic activity is examined. The durability of both nano-TiO2 loaded polyester fabrics pre-pared using exhaustion and padding processes is compared. The results indicate that increasing the bath temperature, pH value or nano-TiO2 concentration can significantly enhance its loading amount and efficiency of nano-TiO2 on the fabric. Nano-TiO2 with large size is loaded easily on polyester fabric. The loading amount of nano-TiO2 on polyester fabric increases with the increasing of bath ratio, but its load- ing efficiency shows a reversed trend. Nano-TiO2 loaded polyester fabric as a photocatalyst can promote the catalytic degradati on of dyes. In crease the loadi ng amount of n ano-TiO2 on polyester fabric can sig- nificantly enhanee its photocatalytic activity. The loaded fabric prepared with smaller size of nano TiO2 has higher photocatalytic activity. Compared with the loaded fabric prepared by padding process, the loaded fabric by exhaustion process exhibits better durability.