低VOCs含量的PET/TiO2@Ag共混体系的研究

以熔融共混与负载银(Ag)的方法制备聚对苯二甲酸乙二醇酯(PET)/二氧化钛@银(TiO2@Ag)共混体系,并通过差示扫描量热仪(DSC)、电子万能材料试验机和可见分光光度计等对共混体系的热性能、力学性能和光催化性能进行研究与分析。结果表明,在纳米TiO2含量为3%(质量分数,下同)时,共混体系的热性能与力学性能最优;Ag的负载能够显著拓宽PET/TiO2@Ag共混体系的光响应范围;随着Ag负载量的增加,共混体系的光催化性能呈先升高后降低的趋势,且在光照时间为4 min时其光催化性能最优,同时共混体系的挥发性有机物(VOCs)的含量呈先降低后升高的趋势,且在光照时间为4 min时,其VOCs含量达到极小值。

Study on PET/TiO2@Ag Blends with Low VOCs Content

In this work,PET/TiO2@Ag blends were prepared by melt blending,followed by Ag loading,and their ther-mal,mechanical and photocatalytic properties were investigated by DSC,electronic universal testing machine and UV-visible spectrophotometer.The results indicated that the blends achieved optimum thermal and mechanical properties at the nano-TiO2 content of 3 wt%.The loading of Ag could significantly broaden the light response range of the blends.With an increase of Ag loading,the photocatalytic properties of the blends increased at first and then tended to decrease.The blends exhibited an optimum photocatalytic effect at the illumination time of 4 min.The content of VOCs in the blends decreased at first and then tended to increase with the illumination time and achieved a minimum value at 4 min.