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林业科学 ›› 2008, Vol. 44 ›› Issue (5): 143-149.doi: 10.11707/j.1001-7488.20080526

• 论文 • 上一篇    下一篇

木塑复合材料老化性能研究进展

王伟宏 王清文 宋永明   

  1. (东北林业大学生物质材料科学与技术教育部重点实验室 哈尔滨 150040)
  • 收稿日期:2006-12-15 修回日期:1900-01-01 出版日期:2008-05-25 发布日期:2015-04-22

Compatibility of Wood Fiber Plastic Composite with Environment

Wang Weihong,Wang Qingwen,Song Yongming   

  1. (Key Lab. of BioBased Material Science and Technology of Ministry of Education,Northeast Forestry University Harbin 150040)
  • Received:2006-12-15 Revised:1900-01-01 Online:2008-05-25 Published:2015-04-22

摘要:

对木塑复合材料(WPC)在耐紫外线老化性能、耐潮湿及冰冻性能和耐真菌腐蚀性能方面的研究成果进行介绍,希望有助于正确评价和使用木塑复合材料,同时为新产品开发提供借鉴。WPC在紫外线作用下产生褪色现象,力学性能降低,而且喷水与紫外光的共同作用会加剧破坏程度; 木粉含量高、颗粒大的WPC更易遭受真菌腐朽威,目前已研制出硼酸锌等多种专用防腐剂; WPC吸水速度慢,但绝大部分集中在表层,吸与冻融循环都会降低力学性能。不同方式生产的WPC其性能有所差异。目前,对老化降解的机理问题仅进行了初步解释。

关键词: 木塑复合材料, 紫外老化, 吸水, 冻-融循环, 真菌腐朽

Abstract:

The use of lingo cellulostic fibers as reinforcing fillers in the thermoplastic industry has gained much acceptance in recent years. This composite is expected to keep growing because of its reasonable utilization of wasted resources and potential ability of protecting environment. However, people are concerning weathering problems when exposing this material to outdoor application. This paper focuses on its resistance to ultraviolet degradation, water and frozen degradation, and fungal decay, which may help properly evaluate and use this new composite material. Accelerated aging showed that ultraviolet could fade color and reduce the mechanical properties of WPC, The combination of ultraviolet and water spraying did more adverse affection than pure ultraviolet. WPC with high proportion wood component or larger size wood particles would risk more fungi decay; scientists have developed preservatives such as Zinc Boric, specially used for WPC. Water penetrated into WPC so slowly, however, most moisture concentrated in outface layer. Both water absorption and freezethaw would reduce mechanical properties of WPC. WPC made by different methods differed in these properties. By far, the reason for WPC degradation has not been completely explained.

Key words: wood fiber/plastic composite(WPC), ultraviolet degradation, water absorption, freezethaw, fungal decay