木纤维对微发泡PVC木塑制品耐候性能的影响
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摘要
该研究通过木质纤维在PVC木塑复合材料(PVC-WPCs)中的应用,研究了木纤维对制品的表面微观结构及制品的吸水性能的影响,通过配方优化显著地改善了木塑复合材料耐水性及户外耐老化性能。研究结果表明:PVC-WPCs的吸水性随着木纤维的引入,70℃条件下PVC-WPCs饱和吸水率达到4. 73%,同时PVC-WPCs吸水前后色差(ΔE)达到14. 1,制品出现显著的褪色现象;通过制品表面显微结构表征,发现制品表面在木纤维颗粒附近出现明显的破孔,水煮后制品出现显著吸水的同时制品表面粗糙度显著增大;利用碱对木粉进行处理后,可显著提升木纤维与树脂PVC的相容性,显著改善制品的耐水性,同时可显著提升PVC-WPCs制品的耐老化性能,氙灯加速老化3000h后,色差值为5. 6,而常规配方色差值达到24. 3。
Through the application of wood fibers in PVC wood Plastic Composites(PVC-WPCs),the effects of wood fibers on the surface microstructure and water absorption properties of products were studied. The water resistance and outdoor aging resistance of wood-plastic composites were significantly improved by optimizing the formulation. The results showed that the saturated water absorption of PVC-WPCs reached 4. 5 % at 70 centigrade with the introduction of wood fibers in the formulation,and the color difference(ΔE) of PVC-WPCs before and after water absorption reached 14. 1,which resulted in obvious fading of the products. The surface microstructure of the products was characterized. It was found that there were obvious holes around the wood fiber particles in the WPC surface. Accompanied by the significant moisture absorption of the products after water-boiling,the surface roughness of the products increased obviously. After the wood fibers were treated,resin PVC was improved significantly by modifying wood flour with coupling agent,and the water resistance of the products was improved significantly. At the same time,the aging resistance of PVC-WPCs products was improved greatly. After xenon lamp accelerated aging 3000 h,ΔE of the optimized formulation was 5. 6,while ΔE of the conventional formulation was 24. 3.
Through the application of wood fibers in PVC wood Plastic Composites(PVC-WPCs),the effects of wood fibers on the surface microstructure and water absorption properties of products were studied. The water resistance and outdoor aging resistance of wood-plastic composites were significantly improved by optimizing the formulation. The results showed that the saturated water absorption of PVC-WPCs reached 4. 5 % at 70 centigrade with the introduction of wood fibers in the formulation,and the color difference(ΔE) of PVC-WPCs before and after water absorption reached 14. 1,which resulted in obvious fading of the products. The surface microstructure of the products was characterized. It was found that there were obvious holes around the wood fiber particles in the WPC surface. Accompanied by the significant moisture absorption of the products after water-boiling,the surface roughness of the products increased obviously. After the wood fibers were treated,resin PVC was improved significantly by modifying wood flour with coupling agent,and the water resistance of the products was improved significantly. At the same time,the aging resistance of PVC-WPCs products was improved greatly. After xenon lamp accelerated aging 3000 h,ΔE of the optimized formulation was 5. 6,while ΔE of the conventional formulation was 24. 3.
引文
[1]成俊卿.木材学[M].北京:中国林业出版社,1985.
[2]唐忠荣.木质材料性能检测[M].北京:中国林业出版社,2006.
[3]韩秋.浅谈新时期木材检验工作[J].农村经济与科技,2011.
[4]薛平.木塑复合材料发展现状及前景[J].建材工业信息,2003(12):6-8.
[5]王清文,王伟宏.木塑复合材料与制品[M].北京:化学工业出版社,2007:64-78.
[6]Chetanachan W,Sookkho D,Sutthitavil W,et al.PVC wood:A new look in construction[J]. Journal of Vinyl&Additive Technology,2001,7(3):134-137.
[7]曾珊琪,刘春燕,王文中,等.塑木材料发展前景的探讨[J].包装工程. 2005,26(4):23.
[8]张兆好,齐英杰.木塑复合材料的应用与发展[J].木材加工机械,2009,20(01):74-77.
[9]伍波,张求慧,李建章.木塑复合材料的研究进展及发展趋势[J].材料导报,2009,23(7):62-64.
[10]王澜,董洁,卜雅萍.聚氯乙烯/稻壳粉木塑发泡制品的研究[J].塑料,2005,34:1-7.
[11]史继诚.高分子材料的老化及防老化研究[J].合成材料老化与应用,2006,35(1):27-30.
[12]徐开蒙,李凯夫,曹馨蕾,等. PVC基木塑复合材料界面结合改性研究进展[J].塑料工业,2014,42:9-14.
[13]秦特夫.改善木塑复合材料界面相容性途径[J].世界林业研究,1997(11):46-50.
[14]熊传溪,周伟,鲁圣军,等.木粉/PVC复合材料的制备及其性能[J].化学建材,2005(1):42-45.
[2]唐忠荣.木质材料性能检测[M].北京:中国林业出版社,2006.
[3]韩秋.浅谈新时期木材检验工作[J].农村经济与科技,2011.
[4]薛平.木塑复合材料发展现状及前景[J].建材工业信息,2003(12):6-8.
[5]王清文,王伟宏.木塑复合材料与制品[M].北京:化学工业出版社,2007:64-78.
[6]Chetanachan W,Sookkho D,Sutthitavil W,et al.PVC wood:A new look in construction[J]. Journal of Vinyl&Additive Technology,2001,7(3):134-137.
[7]曾珊琪,刘春燕,王文中,等.塑木材料发展前景的探讨[J].包装工程. 2005,26(4):23.
[8]张兆好,齐英杰.木塑复合材料的应用与发展[J].木材加工机械,2009,20(01):74-77.
[9]伍波,张求慧,李建章.木塑复合材料的研究进展及发展趋势[J].材料导报,2009,23(7):62-64.
[10]王澜,董洁,卜雅萍.聚氯乙烯/稻壳粉木塑发泡制品的研究[J].塑料,2005,34:1-7.
[11]史继诚.高分子材料的老化及防老化研究[J].合成材料老化与应用,2006,35(1):27-30.
[12]徐开蒙,李凯夫,曹馨蕾,等. PVC基木塑复合材料界面结合改性研究进展[J].塑料工业,2014,42:9-14.
[13]秦特夫.改善木塑复合材料界面相容性途径[J].世界林业研究,1997(11):46-50.
[14]熊传溪,周伟,鲁圣军,等.木粉/PVC复合材料的制备及其性能[J].化学建材,2005(1):42-45.