Photodegradation behavior of poly(butylene succinate-co-butylene adipate)/ZnO nanocomposites
Photodegradation behavior of poly(butylene succinate-co-butylene adipate)/ZnO nanocomposites
复制标题
聚(丁二酸丁二醇酯-己二酸丁二醇酯)/ZnO纳米复合材料的光降解行为
DOI：
10.1016/j.colsurfa.2015.10.038
复制
发表时间：
2016-01-20
影响因子：
5.2
通讯作者：
Guo, Baohua
中科院分区：
文献类型：
--
作者：
Zhang, Yang;Xu, Jun;Guo, Baohua
研究了不同ZnO含量的PBSA和PBSA/ZnO纳米复合材料的光降解性能。采用熔融复合法制备了PBSA/ZnO纳米复合材料，并通过TEM分析了ZnO在PBSA基体中的分散状态。PBSA纳米复合材料的分子量降低低于纯PBSA，表明纯PBSA中发生了更多的断链。通过FTIR和PGC-MS表征了纳米ZnO粒子的化学结构变化，结果表明纳米ZnO粒子对PBSA基体有一定的稳定作用。PBSA纳米复合材料的羰基指数和羟基指数比PBSA纳米复合材料有更显著的增长。更多的降解产物积累在PBSA样品比在PBSA纳米复合材料样品。DSC热性能分析表明，所有样品的结晶温度下降，这是由于短链的形成后照射。此外，小碎片可以重结晶并增加结晶度。样品表面的SEM图像显示，PBSA样品比PBSA/ZnO纳米复合材料表面有更严重的损伤。这些结果表明，ZnO纳米粒子可以阻止PBSA的光降解。(C)2015年由Elsevier B. V.出版
The photodegradation of PBSA and PBSA/ZnO nanocomposites with different ZnO loadings were studied in this paper. The PBSA/ZnO nanocomposites were prepared by melt-compounding process and the ZnO dispersion state within the PBSA matrix was analyzed by TEM. The reduction of molecular weight of PBSA nanocomposites is lower than that of the neat PBSA, which indicates more chain scission occured in neat PBSA. The chemical structure changes characterized by FTIR and PGC-MS showed that ZnO nanopartides can stabilize the PBSA matrix. Carbonyl index and hydroxyl index of PBSA grew more significantly than PBSA nanocomposites. More degradation products accumulated in PBSA samples than in the PBSA nanocomposite samples. Thermal properties analyzed by DSC revealed a decrease of crystallization temperature in all samples, which is due to the formation of short chains after irradiation. In addition, the small fragments could recrystallize and increase the crystallinity. SEM images of sample surfaces revealed that PBSA sample had severer damages on surface than PBSA/ZnO nanocompo site s. These results demonstrate that ZnO nanoparticles can hinder the photodegradation of PBSA. (C) 2015 Published by Elsevier B.V.