上浆剂对碳纤维复合材料拉伸强度的影响

Effect of sizing agent on tensile strength of carbon fiber composites

针对碳纤维复合材料中碳纤维和基体树脂界面结合力弱的问题,对碳纤维进行了上浆处理,分别测试了碳纤维使用水性聚氨酯、聚乙烯醇两种浆料在不同用量、浓度烘干温度时间等条件下上浆后,与聚乙烯膜制成的复合材料拉伸断裂强度的变化情况。通过试验得出:水性聚氨酯上浆的最佳浆液质量分数为30%,此时复合材料的断裂强力是无浆丝复合材料断裂强力的3.74倍;聚乙烯醇上浆的最佳浆液质量分数为6%,此时复合材料的断裂强力为无浆丝复合材料断裂强力的6.92倍。

Aiming at the problem of weak interfacial adhesion between carbon fiber and matrix resin in carbon fiber composites,sizing treatment is carried out on carbon fiber.The changes of tensile breaking strength of composites made of carbon fiber and polyethylene film are tested after sizing with waterborne polyurethane and polyvinyl alcohol under different dosage,concentration,drying temperature and time.The results show that the best slurry concentration of waterborne polyurethane sizing is 30%,and the breaking strength of the composite is 3.74 times of that of the non sizing composite;the optimum slury concentration of polyvinyl alcohol sizing is 6%.and the breaking strength of the composite is 6.92 times of that of the non sizing composite.