界面改性对麦秸秆纤维/聚乙烯复合材料性能的影响  

Effect of interface modification on the properties of wheat fiber/polyethylene composites

作　　者：聂孙建 张效林 丛龙康 邓祥胜 贺新民 NIE Sunjian;ZHANG Xiaolin;CONG Longkang;DENG Xiangsheng;HE Xinmin(Faculty of Printing,Packing Engineering and Digital Media Technology,Xi＇ an University of Technology,Xi＇an 710048,China;Shanxi Jinhe Agricultural Science ＆ Technology Co.Ltd,Xi＇an 710000,China)

机构地区：[1]西安理工大学印刷包装与数字媒体学院,西安710048 [2]陕西金禾农业科技有限公司,西安710000

出　　处：《复合材料学报》2018年第7期1783-1790,共8页Acta Materiae Compositae Sinica

基　　金：陕西省自然科学基金(2015JM3080);安徽省重大科技专项子题(17030701019);西安市碑林区科技计划项目(GX1712)

摘　　要：以陕西关中地区的麦秸秆纤维(WF)和回收的聚乙烯(rPE)为原料,利用挤出和热压成型的方法制备WF/rPE复合材料,研究了界面相容剂马来酸苷接枝聚乙烯(MAPE)、马来酸苷接枝聚乙烯蜡(MAPE蜡)和γ-氨丙基三乙氧基硅烷(KH550)及MAPE蜡含量对WF/rPE复合材料的力学性能、吸水性能、热稳定性和界面性能的影响;利用FTIR和SEM分析了改性前后WF化学结构及WF/rPE复合材料拉伸断面形貌。结果表明:添加MAPE蜡的WF/rPE复合材料力学性能最好,当WF和MAPE蜡的添加量分别为40wt%和2wt%时,WF/rPE复合材料的拉伸强度和弯曲强度分别达到最大值15.0 MPa和23.8 MPa;当MAPE蜡含量高于2wt%时,WF/rPE复合材料力学性能和耐水性能下降。TG结果表明,添加不同界面改性剂对WF/rPE复合材料的热稳定性能无显著影响;FTIR分析发现,硅烷偶联剂KH550可以与WF中的羟基反应;SEM分析表明,添加MAPE蜡的WF/rPE复合材料界面结合比添加MAPE和KH550的WF/rPE复合材料更好。Wheat straw fiber/recycled polyethylene （WF/rPE） composites were preparaed with Shaanxi Guanzhong WF and rPE as the raw materials, using the method of extrusion and molding. The effects of maleate grafted poly- ethylene （MAPE）, maleate grafted polyethylene wax（MAPE wax） and γ-aminopropyltriethoxysilane（KH550） and MAPE wax content on the mechanical properties, moisture absorption, thermal stability and interface performance of WF/rPE composites were studied~ The chemical structure of WF and the tensile profile of WF/rPE composites were analyzed by FTIR and SEM. The results show that the mechanical properties of WF/rPE composites with MAPE wax are the best, when the content of WF and MAPE wax are 40wt% and 2wt%, the tensile strength and flexural strength of the WF/rPE composites reach a maximum of 15.0 MPa and 23.8 MPa; When the content of MAPE wax is over 2wt%, the mechanical properties and moisture absorption of WF/rPE composites decrease. The TG result shows that the addition of different interracial modifiers has no significant influence on the thermal stabili- ty of WF/rPE composites; The FTIR analysis shows that the silane coupling agent KH550 can react with the hy- droxyl group in WF. The SEM analysis shows that the addition of MAPE wax to the WF/rPE composites interface is better than the addition of MAPE and KH550 WF/rPE composites.

关 键 词：麦秸秆 聚乙烯 复合材料 界面相容剂 表面改性 界面相容性 界面改性剂 

分 类 号：TB332[一般工业技术—材料科学与工程]