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本文采用碱处理、硅烷偶联剂处理、化学接枝和热处理等物理化学方法，对剑麻纤维进行改性。研究了改性后短剑麻纤维／酚醛树脂复合材料的弯曲性能、无缺口冲击强度和布氏硬度，借助扫描电子显微镜观察了复合材料的弯曲断口形貌，并研究了剑麻纤维的不同处理方法对复合材料耐水浸泡性的影响。结果表明：剑麻纤维经硅烷偶联剂处理后，能有效改善刚性的剑麻纤维与脆性的酚醛树脂基体之间的粘结，从而提高了复合材料的综合力学性能，剑麻纤维改性后，对降低复合材料吸水性效果最好的方法是接枝丙烯酸，其次是用硅烷偶联剂处理。
In this paper, alkali treatment, silane coupling agent treatment, chemical grafting and heat treatment and other physical and chemical methods, the sisal fiber modified. The flexural properties, unnotched impact strength and Brinell hardness of the modified stigma / phenolic resin composites were studied. The flexural fracture morphology of the composites was observed by scanning electron microscopy, and the different treatment methods of sisal fiber Effect of Water-Immersion on Composite Materials. The results show that the sisal fiber treated with silane coupling agent can effectively improve the bond between rigid sisal fiber and brittle phenolic resin matrix and improve the mechanical properties of the composites. After the sisal fiber is modified , The best way to reduce the water absorption of the composite is to graft acrylic acid followed by silane coupling agent.