Effect of nano TiO2 on UV aging resistance of wood fiber/polypropylene composites

被引：0
|
作者：
Mu M. [1 ]
Yuan G. [1 ,2 ]
Chen S. [1 ]
机构：
[1] School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha
[2] Hu'nan Collaborative Innovation Center for Effective Utilizing of Wood & Bamboo Resource, Changsha
来源：
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2020年 / 37卷 / 06期
关键词：
Anti-ultraviolet aging; Composites; Nano TiO[!sub]2[!/sub; Polypropylene(PP); Surface modification; Wood fiber(WF);
D O I：
10.13801/j.cnki.fhclxb.20190929.004
中图分类号：
学科分类号：
摘要：
When wood-plastic composites are used as outdoor building decoration materials, they are exposed to ultraviolet light, resulting in mechanical properties and service life reducing. The rutile nano TiO2 with high-efficiency ultraviolet shielding ability was surface-modified with a silane coupling agent KH-570, and then TiO2-WF/PP composites were prepared with wood fiber (WF), polypropylene (PP). The artificial accelerated UV aging of the composites was carried out. The effects of nano TiO2 on the UV aging of WF/PP composites were investigated by means of FTIR, TG, SEM, mechanical properties analysis and color change analysis. The results show that the modified nano TiO2 particles can be uniformly dispersed in WF/PP composites without obvious agglomeration, and their addition significantly improves the thermal stability of the composites; with the aging time prolonged, the decrease of the mechanical properties of WF/PP composites is relatively small and the color change scope is small. When the mass fraction of nano TiO2 particles is 2 wt%-3 wt% and aging for 2 000 h, the tensile strength and impact strength of the TiO2-WF/PP composites only decrease by 10.0% and 12.6%, respectively, while those without the addition of nano TiO2 particles decrease by 20.2% and 22.6%, respectively. © 2020, Editorial Office of Acta Materiae Compositae Sinica. All right reserved.
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页码：1268 / 1277
页数：9
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