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苯酚电聚合膜修饰炭纤维表面对环氧基复合材料性能的影响

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Keywords: 聚苯酚,炭纤维,表面修饰,界面,复合材料

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Abstract:

将连续炭纤维束用自制的空气梳分散成单丝状长带后,通过采用循环伏安法的电化学方法将单体苯酚在炭纤维表面聚合成膜,对炭纤维进行表面修饰,以提高复合材料中炭纤维与树脂基体的界面粘结性能。红外光谱分析表明,苯酚电聚合膜能够增加炭纤维表面的羟基、醚键等活性官能团,从而提高炭纤维与环氧树脂基体的界面粘结强度。与未进行表面修饰的炭纤维增强环氧树脂复合材料相比,以聚苯酚膜修饰的炭纤维单丝带增强的环氧树脂基复合材料横向拉伸强度最大提高了90%,纵向拉伸强度最大提高了45%,层间剪切强度最大提高了110%。实验也表明,将炭纤维束分散成炭纤维单丝带后能够更有效地增强复合材料的各项力学性能。

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