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- 2018
界面改性对麦秸秆纤维/聚乙烯复合材料性能的影响
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Abstract:
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 polyethylene (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 interfacial modifiers has no significant influence on the thermal stability of WF/rPE composites; The FTIR analysis shows that the silane coupling agent KH550 can react with the hydroxyl 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.
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