水降解对木纤维/聚乳酸复合材料性能的影响

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英文篇名：The Effect of Water Degradation on the Mechanical Property of Wood Fiber/Polylactic Acid 作者：刘一楠 ; 刘珊杉 ; 王春明 ; 刘巍岩 英文作者：LIU Yinan;Heilongjiang Institute of Wood Science; 关键词：聚乳酸 ; 木纤维 ; 水降解 ; 力学性能 英文关键词：Polylactic acid;;Lop wood;;Wood fiber;;Water degradation;;Mechanical property 中文刊名：LYKJ 英文刊名：Forestry Science & Technology 机构：黑龙江省木材科学研究所; 出版日期：2019-07-25 出版单位：林业科技 年：2019 期：v.44;No.245 基金：黑龙江省森工总局科技计划项目“木材纤维/聚乳酸复合材料完全可降解育苗花盆产品的研究开发”(sgzj Y2014009) 语种：中文; 页：LYKJ201904001 页数：4 CN：04 ISSN：23-1183/S 分类号：5-8

摘要

聚乳酸是一种强度较高的聚酯类材料,其良好的降解性能在保证了其环保优势的同时,也对其物理力学性能产生一定影响。本研究将木纤维/聚乳酸复合材料置于水环境中进行水解处理,然后测试复合材料的力学性能。结果显示,将复合材料放置在水中一段时间后,复合材料的弯曲性能和拉伸性能都显著下降,木纤维含量越高,材料性能下降越明显。这说明水环境使聚乳酸分子链发生了水解反应,使材料性能下降;同时,木纤维的吸水膨胀和干燥收缩也使材料界面薄弱点增加,使材料性能有所下降。
        Polylactic acid is a kind of polyester material with high strength. It is a environmental friendly material because of its degradability, meanwhile the degradation would remarkable impact its properties. In this study, wood fiber/polylactic acid composite was immersed in water during 90 days, then the bending property and tensile property were tested. The result showed that the bending property and tensile property were significant declined. The higher content of wood fiber the more decline of composite properties. This indicate the water degradation occurred on the molecular chain of polylactic acid result in the decreasing of composite mechanical property. On the other hand, the process of wood absorbed water then dry out of it would change its volume, this generate weak points between the interface of wood fiber and polylactic acid,result in the decreasing of composite mechanical property.

引文

[1]Nampoothiri K M,Nair N R,John R P.An overview of the recent developments in polylactide(PLA)research[J].Bioresource Technology,2010,101(22):8 493-8 501.
    [2]Oksman K,Skrifvars M,Selin J F.Natural fibres as reinforcement in polylactic acid(PLA)composites[J].Composites Science&Technology,2003,63(9):1 317-1 324.
    [3]Karamanlioglu M,Preziosi R,Robson G D.Abiotic and biotic environmental degradation of the bioplastic polymer poly(lactic acid):A review[J].Polymer Degradation and Stability,2017,137:122-130.
    [4]Lv S,Liu X,Gu J,et al.Microstructure analysis of polylactic acid-based composites during degradation in soil[J].International Biodeterioration&Biodegradation,2017,122:53-60.
    [5]王媛,纪乐,王庭慰.聚乳酸的紫外光解和沸水降解[J].南京工业大学学报(自然科学版),2009,31(2):69-72.
    [6]刘一楠.冷却速率及纤维形态对木纤维/聚乳酸复合材料性能的影响[D].北京:中国林业科学研究院,2014.
    [7]郭文静,鲍甫成,王正.复合方式对木纤维-聚乳酸生物质复合材料结构与性能的影响[J].北京林业大学学报,2009,31(4):106-111.
    [8]Hinchcliffe S A,Hess K M,Srubar W V.Experimental and theoretical investigation of prestressed natural fiber-reinforced polylactic acid(PLA)composite materials[J].Composites Part B,2016,95:346-354.
    [9]李二云.土壤酸碱性对植物生长的影响及其改良措施[J].现代农村科技,2012(6):48-48.
    [10]唐琨,朱伟文,周文新,等.土壤pH值对植物生长发育影响的研究进展[J].作物研究,2013(2):207-212.
    [11]刘一楠,刘栅杉,王春明,等.光老化时间对旱柳枝桠材纤维/聚乳酸复合材料性能影响[J].林业科技,2019,44(3):1-4.