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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(KH-550)及马来酸苷接枝聚乙烯蜡(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、弯曲强度达到最大值15.0MPa和23.8MPa;当MAPE蜡含量高于2wt%,WF/rPE复合材料力学性能和耐水性能下降。TG表明,添加不同界面改性剂对WF/rPE复合材料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中羟基反应;SEM分析表明,添加MAPE蜡的WF/rPE复合材料界面结合要比添加MAPE和KH550的WF/rPE复合材料更好。
WF / rPE composites were prepared by extrusion and thermocompression molding with wheat straw fiber (WF) and recycled polyethylene (rPE) in Guanzhong area of Shaanxi Province as the raw materials. The effects of interfacial compatibilizer (MAPE), maleic acid grafted polyethylene wax (MAPE wax) and γ-aminopropyl triethoxy silane (KH-550) and maleic acid grafted polyethylene wax (MAPE wax) On the mechanical properties, water absorption, thermal stability and interfacial properties of WF / rPE composites. The FTIR and SEM were used to analyze the tensile properties of WF / WF / WPE composites before and after modification. The results show that the mechanical properties of WF / rPE composites with MAPE wax are the best. When WF and MAPE waxes are 40wt% and 2wt% respectively, the tensile strength and flexural strength of WF / rPE composites reach the maximum 15.0 MPa and 23.8MPa respectively. When the content of MAPE wax is higher than 2wt%, the mechanical properties and water resistance of WF / rPE composites decrease. TG showed that the addition of different interface modifiers had no significant effect on the thermal stability of WF / rPE composites. FTIR analysis showed that the silane coupling agent KH550 reacted with hydroxyl groups in WF. SEM analysis showed that WF / rPE with MAPE waxes The material interface is better than the WF / rPE composite with MAPE and KH550.