Department of Fabric and Apparel Science, Lady Irwin College, University of Delhi, New Delhi 110001, India.
SMITA Research Lab, Department of Textile Technology, Indian Institute of Technology, Hauz Khas, New Delhi 110016, India.
Carbohydr Polym. 2016 Dec 10;154:167-75. doi: 10.1016/j.carbpol.2016.08.035. Epub 2016 Aug 12.
Titania (TiO2) nanoparticle dispersions in water were prepared using chitosan (CS) as the stabilizing agent. The dispersion stability was evaluated with respect to storage time, hydrodynamic particle size, and zeta potential. The effect of the molecular weight of CS and presence of non-ionic polymers (poly(vinyl alcohol) and poly(ethylene glycol)) as co-dispersants was investigated. Despite the increase in size of dispersed particles, the long-term storage stability of the dispersions improved with increasing concentration and molecular weight of CS. The TiO2/CS dispersions were applied on cotton fabric and characterized. The presence of CS did not seriously affect the photocatalytic self-cleaning activity (SCA) of TiO2; with CS, a SCA of 89% was achieved compared with a value of 96% without CS. In addition, the TiO2/CS-treated cotton fabrics provided UV protection and significant antimicrobial activity.
采用壳聚糖（CS）作为稳定剂制备了水中的金红石（TiO2）纳米颗粒分散体。考察了储存时间、水动力粒径和zeta 电位对分散体稳定性的影响。考察了 CS 的分子量和非离子聚合物（聚乙烯醇和聚乙二醇）作为共分散剂的存在对其的影响。尽管分散颗粒的粒径增大，但随着 CS 浓度和分子量的增加，分散体的长期储存稳定性提高。将 TiO2/CS 分散体应用于棉织物并进行了表征。CS 的存在并没有严重影响 TiO2 的光催化自清洁活性（SCA）；使用 CS 时，SCA 达到 89%，而没有 CS 时为 96%。此外，TiO2/CS 处理的棉织物提供了紫外线防护和显著的抗菌活性。
