發(fā)布時間：2018-08-16 13:10

【摘要】：為了制備高強度木塑復合材料,擴大木塑復合材料的應用范圍。本課題以楊木粉,高密度聚乙烯,玻璃纖維(GF)為主要原料,通過擠出注塑成型法制備了玻璃纖維/木塑復合材料(以下簡稱復合材料),并對材料的力學性能進行了測試,以及對材料的界面進行了研究。通過研究玻璃纖維長度和含量、硅烷偶聯(lián)劑(KH550)的濃度、馬來酸酐接枝聚乙烯(MAPE)的含量、等離子體不同條件的處理對復合材料性能的影響,以達到玻璃纖維增強木塑復合材料的目的,通過實驗研究,得出以下結論:1、向木粉/聚乙烯體系中添加玻纖,考察復合材料力學性能與玻纖長度與添加量的關系,研究表明,當玻纖長度為4.5mm,添加量為15%時,復合材料的綜合力學性能達到最優(yōu)。2、采用硅烷偶聯(lián)劑對玻纖進行預處理,考察不同濃度偶聯(lián)劑對玻纖預處理后增強復合材料,對復合材料力學性能的影響,研究表明,當硅烷偶聯(lián)劑濃度為1.5%時,復合材料的各項力學性能都得到增強。3、在木粉/玻纖/聚乙烯體系中添加相容劑,一定程度上改善了復合材料內(nèi)各相之間的界面相容性,另一方面考察相容劑添加量與復合材料力學性能的關系,研究表明,當相容劑的添加量為8%時,復合材料的力學性能達到最優(yōu)。4、采用等離子體處理,尋求最佳等離子體處理工藝條件,研究表明,當工作氣體為氧氣,處理功率為100W,處理時間為90s時,對復合材料的力學性能增強效果最好。5、在木粉/玻纖/聚乙烯體系中,將木粉與玻纖一同視為增強相,考察木粉與玻纖的不同配比對復合材料力學性能的影響,研究表明,當木粉含量偏大時,復合材料的拉伸和彎曲性能較優(yōu),而當玻纖含量較大時,復合材料的沖擊性能較優(yōu)。
[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.
【學位授予單位】：南京林業(yè)大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TB332

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本文編號：2186079