聚乙烯基共挤木塑复合材料的吸水性能  

Water Absorption of Multilayer Co-Extruded Wood-Plastic Composite Based on PE

作　　者：张清锋 汪济奎[2] ZHANG Qingfeng;WANG Jikui(Shaoxing Yongsheng New Material Co.,Ltd.,Shaoxing,Zhejiang 312369,China;School of Materials Science and Engineering,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]绍兴永昇新材料有限公司,浙江绍兴312369 [2]华东理工大学材料科学与工程学院,上海200237

出　　处：《塑料》2022年第1期21-24,55,共5页Plastics

摘　　要：利用共挤技术制备了具有核-壳多层结构的聚乙烯基共挤木塑复合材料,通过与非共挤木塑复合材料进行对比,研究了2种木塑复合材料的吸水率、吸水厚度膨胀率、弯曲强度和吸水干燥后强度的变化,并采用扫描电镜表征木纤维和塑料基体之间的界面相容性。研究结果表明,在水中浸泡276 h后,共挤木塑复合材料吸水率仅为3.8%,远小于非共挤木塑复合材料的吸水率9.6%;端头部位的吸水厚度膨胀率无显著差异;浸水后,共挤木塑复合材料弯曲强度保留率可达到78%,与非共挤木塑复合材料相比,提高了16%;试样浸水结束后,再干燥48 h,共挤木塑复合材料的弯曲强度无明显变化,这表明,共挤木塑复合材料具有更显著的性能优势。Multilayer co-extruded wood-plastic composite(WPC)which included a shell layer and a core layer was prepared by coextrusion technology.Compared with un-coextruded WPC,the water absorption,the thickness swelling and the flexural strength of coextruded WPC were studied after soaking in water.Besides,the interfacial adhesion between wood fibers and plastic matrix(HDPE)was characterized by SEM.The result showed that the water absorption of co-extruded WPC was only 3.8%after soaking in water for 276 h,which was significantly less than 9.6%of un-coextruded WPC.However,there was no evident difference in thickness swelling.The retention rate of flexural strength was 78%,which was 16%superior to that of un-coextruded WPC.After soaking,the samples were dried for 48 h,it was not obvious that the flexural strength of co-extruded WPC was changed.Therefore,co-extruded WPC had much more outstanding properties.

关 键 词：多层共挤 木塑复合材料 吸水 性能 优势 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]