【摘要】：為了制備高強(qiáng)度木塑復(fù)合材料,擴(kuò)大木塑復(fù)合材料的應(yīng)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(guò)擠出注塑成型法制備了玻璃纖維/木塑復(fù)合材料(以下簡(jiǎn)稱復(fù)合材料),并對(duì)材料的力學(xué)性能進(jìn)行了測(cè)試,以及對(duì)材料的界面進(jìn)行了研究。通過(guò)研究玻璃纖維長(zhǎng)度和含量、硅烷偶聯(lián)劑(KH550)的濃度、馬來(lái)酸酐接枝聚乙烯(MAPE)的含量、等離子體不同條件的處理對(duì)復(fù)合材料性能的影響,以達(dá)到玻璃纖維增強(qiáng)木塑復(fù)合材料的目的,通過(guò)實(shí)驗(yàn)研究,得出以下結(jié)論:1、向木粉/聚乙烯體系中添加玻纖,考察復(fù)合材料力學(xué)性能與玻纖長(zhǎng)度與添加量的關(guān)系,研究表明,當(dāng)玻纖長(zhǎng)度為4.5mm,添加量為15%時(shí),復(fù)合材料的綜合力學(xué)性能達(dá)到最優(yōu)。2、采用硅烷偶聯(lián)劑對(duì)玻纖進(jìn)行預(yù)處理,考察不同濃度偶聯(lián)劑對(duì)玻纖預(yù)處理后增強(qiáng)復(fù)合材料,對(duì)復(fù)合材料力學(xué)性能的影響,研究表明,當(dāng)硅烷偶聯(lián)劑濃度為1.5%時(shí),復(fù)合材料的各項(xiàng)力學(xué)性能都得到增強(qiáng)。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(fù)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(fù)合材料力學(xué)性能的關(guān)系,研究表明,當(dāng)相容劑的添加量為8%時(shí),復(fù)合材料的力學(xué)性能達(dá)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(dāng)工作氣體為氧氣,處理功率為100W,處理時(shí)間為90s時(shí),對(duì)復(fù)合材料的力學(xué)性能增強(qiáng)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(qiáng)相,考察木粉與玻纖的不同配比對(duì)復(fù)合材料力學(xué)性能的影響,研究表明,當(dāng)木粉含量偏大時(shí),復(fù)合材料的拉伸和彎曲性能較優(yōu),而當(dāng)玻纖含量較大時(shí),復(fù)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(xué)位授予單位】：南京林業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TB332

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