Effects of a layered double hydroxide (LDH) on the photostability of wood flour/polypropylene composites during UV weathering

被引：22
|
作者：
Peng, Yao [1 ]
Wang, Wen [1 ]
Cao, Jinzhen [1 ]
Guo, Xi [1 ]
机构：
[1] Beijing Forestry Univ, MOE Key Lab Wooden Mat Sci & Applicat, Beijing 100083, Peoples R China
来源：
RSC ADVANCES | 2015年 / 5卷 / 51期
关键词：
ABSORPTION PROPERTIES; PLASTIC COMPOSITES; NANOCOMPOSITES; POLYPROPYLENE; STABILIZATION; DEGRADATION; BLOCKING; FLOUR;
D O I：
10.1039/c5ra04999g
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
In this study, a kind of layered double hydroxide, MgAl-CO3-LDH, was synthesised and its effects on the photostability of wood flour/polypropylene (WF/PP) composites during weathering were investigated. WF/PP composites with different LDH loading levels were prepared and tested in a QUV accelerated weathering tester for a total 960 h. The surface color, surface gloss, and flexural properties of the composites were tested, accompanied by characterizations using SEM, ATR-FTIR, and TG. The results indicated that (1) the flexural properties of the LDH-loaded composites were improved; (2) the composites containing LDH showed less discoloration, fewer surface cracks, and less loss of flexural strength and modulus than the control group; (3) LDH played a positive effect on alleviating the photo-oxidation process of WF/PP composites, confirming its UV-shielding effect; (4) LDH enhanced the thermal stability of the composites before and after weathering.
引用
收藏
页码：41230 / 41237
页数：8
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