改性玄武岩纤维增强木塑复合材料的研究

Wood-Plastic Composites Reinforced by Modified Basalt Fibers

玄武岩纤维(BF)分别经氨基和乙烯基硅烷偶联剂处理后,添加到高密度聚乙烯(HDPE)基木塑复合材料中,用于增强木粉(WF)-HDPE复合材料的性能。研究中利用扫描电镜与红外光谱对玄武岩纤维表面进行表征,探究玄武岩纤维含量及界面微观形态对复合材料力学性能的影响。结果表明:经偶联剂处理的玄武岩纤维与树脂基体界面结合较好,复合材料的冲击性能明显提高,氨基偶联剂提高了拉伸强度,硅烷偶联剂则提高了弯曲强度;添加4%的改性玄武岩纤维可达到较好的增强效果。

Basalt fibers （BF）were surface-modified byγ-aminopropyltriethoxysilane and Vinyl-triethoxysi-lane coupling agents and then added into wood fiber reinforced high density polyethylene （HDPE ）composites to improve the mechanical properties of the later.The surface of basalt fibers were characterized by SEM and FTIR, and the effects of the basalt fiber content and micrographic fracture surface on the mechanical properties of the com-posites were studied.The results showed that BF modified by coupling agents could be better combined with HDPE surface due to the increased interfacial compatibility between BF and HDPE,the impact property of the composites was improved,the tensile strength of the composites was increased with the addition of BF treated byγ-aminopro-pyltriethoxysilane coupling agent and the flexure strength was promoted with the addition of BF treated by Vinyl-triethoxysilane coupling agent,respectively.The results indicated that the above properties of the composites could be significantly increased by adding 4% of the modified basalt fibers.