摘要
采用聚合物接枝改性TiO2颗粒作为催化剂,制备了一种新型可光催化降解的纳米PS-g-TiO2复合薄膜,并在空气中紫外光照下进行了薄膜的光催化降解实验。利用失重、FTIR和SEM等分别对光照前后纯PS膜及复合薄膜进行分析表征。结果表明改性TiO2颗粒在聚合物中分散良好、催化活性较高,能有效地降解聚苯乙烯薄膜。复合薄膜经紫外光照396 h后,光降解失重率达到31.9%。
A novel photodegradable polystyrene-grafted TiO2 （PS-g-TiO2） nanocomposite was prepared by embedding the grafted TiO2 into the commercial polystyrene. Solid-phase photocatalytic degradation of the PS g-TiO2 nanocomposite was carried out in ambient air at room temperature under ultraviolet irradiation. The properties of composite film were compared with that of the pure PS film by weight-loss measurement, scanning electron microscope （SEM） and FTIR methods. The results showed that grafted TiO2 dispersed in PSfilm excellently, and the photo-induced degradation of PS-g-TiO2 composite film was significantly higher than that of pure PS film. The weight loss of composite film reached 31.9%. FTIR analysis and weight loss indicated that the benzene rings in PS-matrix of composite film were cleaved during UV-light irradiation.
出处
《化学与生物工程》
CAS
2006年第9期13-14,共2页
Chemistry & Bioengineering
