协同改性处理对剑麻增强HDPE复合材料力学性能的影响  

Effect of Synergistic Modification on Mechanical Properties of Sisal Reinforced HDPE Composites

作　　者：胡灿 周跃云[1] 张婷 江太君[1] 曾广胜[1] HU Can;ZHOU Yue-yun;ZHANG Ting;JIANG Tai-jun;ZENG Guang-sheng(Hunan Key Laboratory of Biomass Fiber Functional Materials,Hunan International Scientific and Technological Innovation Cooperation Base of Biomass Fiber Materials and Application,School of Urban and Environmental,Hunan University of Technology,Zhuzhou 412007,China;Hunan Technician College of Industry and Commerce,Zhuzhou 412006,China)

机构地区：[1]湖南工业大学生物质纤维功能材料湖南省重点实验室,湖南省生物质纤维材料与应用国际科技创新合作基地,城市与环境学院,湖南株洲412007 [2]湖南工贸技师学院建筑装饰系,湖南株洲412006

出　　处：《塑料工业》2020年第8期118-122,140,共6页China Plastics Industry

基　　金：国家自然科学基金项目(51973056);湖南省教育厅科学研究项目(18A258,18C0524);湖南省研究生科研创新项目(CX20190843,CX20190844)。

摘　　要：植物纤维和树脂的界面相容性差一直制约着天然纤维复合材料的发展和应用。分别对剑麻纤维(SF)进行了碱-偶联协同处理和碱-接枝协同处理,并利用双螺杆挤出机制备了SF/高密度聚乙烯(HDPE)复合材料。观察了剑麻纤维表面以及复合材料断面的微观形貌,表征了改性前后纤维基团的变化,研究了协同改性处理对剑麻纤维及其复合材料力学性能的影响。结果表明,碱-偶联协同处理的改性效果更好,剑麻纤维与HDPE的相容性得到明显改善,复合材料最大拉伸强度和弯曲强度相对于未改性纤维复合材料分别提高18.64%和20.25%。The poor interfacial compatibility between plant fiber and resin always restricted the development and application of natural fiber composites.The sisal fiber was treated with alkali-coupling synergistic treatment and alkali-grafting synergistic treatment,and the sisal/high density polyethylene composites(HDPE)were prepared by a twin-screw extruder.The micro-morphology of sisal fiber and the cross section of the composite were observed,and the changes of fiber groups before and after modification were characterized.The effect of synergistic modification on the mechanical properties of sisal fiber and its composite was studied.The results show that the modification effect of the alkali-coupling synergistic treatment is better,the interfacial compatibilities of sisal fiber and high-density polyethylene are significantly improved,and the maximum tensile strength and flexural strength of the composite material increase 18.64%and 20.25%,respectively.

关 键 词：剑麻 高密度聚乙烯 协同改性 复合材料 相容性 力学性能 

分 类 号：TQ325.1[化学工程—合成树脂塑料工业] TQ327.9