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木塑复合材料(WPC)的耐候性能决定了材料的户外使用寿命。文中介绍了国内外在WPC耐热氧老化、耐光氧老化、耐真菌腐朽及耐潮湿与冻融性能方面的研究进展。现有研究表明,热氧老化与光氧老化均使得WPC发生褪色现象,力学性能下降,添加抗氧化剂与光稳定剂可分别改善二者对WPC的破坏作用。WPC中木粉含量较高时更易发生真菌腐朽现象,添加化学防腐剂或其他助剂、木粉改性及涂饰可有效抑制真菌腐朽。WPC的吸水性是其热氧老化、光氧老化、真菌腐朽及冻融循环过程的催化剂。文中还总结了目前WPC耐候性能研究存在的主要问题,并对其未来趋势进行了展望。
The weatherability of wood-plastic composite (WPC) determines the outdoor life of the material. In this paper, the research progress of WPC at home and abroad on thermal aging resistance, light aging resistance, fungal decay resistance and humidity and freeze-thaw resistance properties are introduced. The existing research shows that thermal oxidative aging and photooxidation aging cause the WPC to fade and the mechanical properties decrease. The addition of antioxidants and light stabilizers can improve the destruction of WPC. WPC wood flour content is more prone to fungal decay phenomenon, add chemical preservatives or other additives, wood flour modified and coated can effectively inhibit fungal decay. WPC water absorption is its thermal oxygen aging, photooxidation, fungal decay and freeze-thaw cycle catalyst. The article also summarizes the main problems existing in WPC weatherability research and prospects its future trends.