自然气候老化对木塑地板性能的影响

沈洋1龚迎春1王云2黄伟2吴章康1

(1.西南林业大学材料工程学院，云南 昆明 650224；

2.西双版纳华坤生物科技有限责任公司，云南 西双版纳 666100)

摘要：以高密度聚乙烯(HDPE)和木粉(橡胶木粉或红木粉)为主要原料，添加紫外线吸收剂(UV-531、UV-1)，挤出成型木塑地板，研究昆明与西双版纳两地180 d自然气候老化对其性能的影响。结果表明:自然气候老化使木塑地板抗弯性能降低，高温暴晒是主要原因之一；自然气候老化使木塑地板表面颜色发生变化，添加和木粉原料相适应的紫外线吸收剂可以有效提高木塑地板的表面色牢度；降雨量增大会提高木塑地板的吸水率，添加紫外线吸收剂有助于提升木塑地板的耐水性能。

关键词：木塑地板；抗弯性能；色牢度；吸水率

中图分类号：S781.3

文献标志码：A

文章编号：2095-1914(2015)02-0100-05

Abstract:The high density polyethylene (HDPE) and the wood powder (rubber wood flour or annatto powder) are used as the main raw material for the study and added with 0.3% of UV absorbers (UV-531 or UV-1), extrusion molding them for PE based wood-plastic floor. 180 days observation was made for natural weathering effects on wood-plastic floor′s performance in Kunming and Xishuangbanna. The results showed that: The 180-day natural weathering reduce the wood-plastic floor′s bending performance， high temperature and exposure to the sun is one of the main reasons;The surface color changes with the Natural weathering exposure, adding proper UV absorber fitting with wood powder raw material can effectively improve the fastness of surface color in wood-plastic floor; The heavy rainfall will increase the water absorption rate of wood-plastic flooring， adding UV absorbers can enhance water resistance of wood-plastic flooring.

Keywords:wood-plastic flooring; bending performance; color fastness; water absorption rate

收稿日期：2014-11-02

基金项目：云南省教育厅科学研究基金一般项目(2013Y113)资助；功能型木塑复合材料产业化关键技术研究项目(31261801)资助。

doi:10.11929/j.issn.2095-1914.2015.02.018

Natural Weathering Effects on the Performance of

Wood-Plastic Flooring

SHEN Yang1，GONG Ying-chun1，WANG Yun2，HUANG Wei2，WU Zhang-kang1

(1.College of Material Engineering, Southwest Forestry University, Kunming Yunnan 650224,China；

2.Huakun Biotechnology CO.,Ltd., Xishuangbanna Yunnan 666100, China)

木塑地板是将生物质纤维、塑料以及多种添加剂混合挤出、模压或注射成型的一种新型复合材料[1]。近年来，木塑地板因其显著的经济和环保优势在我国取得了重大发展契机，木塑地板产业日新月异[2]。然而，由于基本配方、加工方法和使用环境的影响，木塑复合材料(wood-plastic composite，WPC)会在一定时间的持续老化作用下，发生表面褪色和力学性能退化的现象[3-4]。Tascioglu C等[5]研究了自然气候条件下木塑复合材料耐久性能的变化，国内也有相关研究[6-10]；……