玻璃纤维增强木塑复合材料的研究

发布时间：2018-08-16 13:10

【摘要】：为了制备高强度木塑复合材料,扩大木塑复合材料的应用范围。本课题以杨木粉,高密度聚乙烯,玻璃纤维(GF)为主要原料,通过挤出注塑成型法制备了玻璃纤维/木塑复合材料(以下简称复合材料),并对材料的力学性能进行了测试,以及对材料的界面进行了研究。通过研究玻璃纤维长度和含量、硅烷偶联剂(KH550)的浓度、马来酸酐接枝聚乙烯(MAPE)的含量、等离子体不同条件的处理对复合材料性能的影响,以达到玻璃纤维增强木塑复合材料的目的,通过实验研究,得出以下结论:1、向木粉/聚乙烯体系中添加玻纤,考察复合材料力学性能与玻纤长度与添加量的关系,研究表明,当玻纤长度为4.5mm,添加量为15%时,复合材料的综合力学性能达到最优。2、采用硅烷偶联剂对玻纤进行预处理,考察不同浓度偶联剂对玻纤预处理后增强复合材料,对复合材料力学性能的影响,研究表明,当硅烷偶联剂浓度为1.5%时,复合材料的各项力学性能都得到增强。3、在木粉/玻纤/聚乙烯体系中添加相容剂,一定程度上改善了复合材料内各相之间的界面相容性,另一方面考察相容剂添加量与复合材料力学性能的关系,研究表明,当相容剂的添加量为8%时,复合材料的力学性能达到最优。4、采用等离子体处理,寻求最佳等离子体处理工艺条件,研究表明,当工作气体为氧气,处理功率为100W,处理时间为90s时,对复合材料的力学性能增强效果最好。5、在木粉/玻纤/聚乙烯体系中,将木粉与玻纤一同视为增强相,考察木粉与玻纤的不同配比对复合材料力学性能的影响,研究表明,当木粉含量偏大时,复合材料的拉伸和弯曲性能较优,而当玻纤含量较大时,复合材料的冲击性能较优。
[Abstract]:In order to prepare high strength wood-plastic composites, the application of wood-plastic composites was expanded. Using poplar powder, high density polyethylene (HDPE) and glass fiber (GF) as main materials, glass fiber / wood plastic composites (hereinafter referred to as composites) were prepared by extrusion injection molding, and the mechanical properties of the composites were tested. And the interface of the material was studied. The effects of the length and content of glass fiber, the concentration of silane coupling agent (KH550), the content of maleic anhydride grafted polyethylene (MAPE) and the treatment of plasma on the properties of the composites were studied. In order to achieve the goal of glass fiber reinforced wood-plastic composite, the following conclusion is drawn from the experimental study: 1. Adding glass fiber to wood flour / polyethylene system. The relationship between mechanical properties and glass fiber length and the content of glass fiber is investigated. When the length of glass fiber is 4.5 mm and the content of glass fiber is 15 mm, the comprehensive mechanical properties of the composite reach the optimum value of 0.2. The glass fiber is pretreated with silane coupling agent. The results show that when the concentration of silane coupling agent is 1.5, the mechanical properties of the composites are enhanced by 0.3, and the compatibilizer is added to the wood flour / glass fiber / polyethylene system. On the other hand, the relationship between the content of compatibilizer and the mechanical properties of the composite is investigated. The results show that when the content of compatibilizer is 8, The mechanical properties of the composites reach the optimum. 4. Plasma treatment is used to find the best plasma treatment conditions. The results show that when the working gas is oxygen, the treatment power is 100 W, the treatment time is 90 s. In the system of wood powder / glass fiber / polyethylene, wood powder and glass fiber are regarded as reinforcing phase together. The effect of different ratio of wood powder and glass fiber on the mechanical properties of composite is investigated. The tensile and flexural properties of the composites were better when the wood flour content was higher, and the impact properties of the composites were better when the glass fiber content was higher.
【学位授予单位】：南京林业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB332

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