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采用阳极氧化法对碳纤维进行了表面处理,并探讨了表面处理后碳纤维接触角、强度的变化和碳纤维强度离散性的表征方法。研究发现:碳纤维在阳极氧化表面处理后,接触角变小,说明浸润性增强,强度略有下降,离散性略有增大;表面处理后随放置时间延长,接触角有一定程度增大,强度继续下降,离散性继续增大。用强度CV值和韦伯分布拟合强度所得的韦伯模数两种不同指标表征了表面处理后碳纤维的强度离散性,经验证,两种表征方法的一致性好。
Anodic oxidation of carbon fiber surface treatment, and discusses the surface treatment of carbon fiber contact angle, strength changes and carbon fiber strength dispersion of the characterization. The results showed that the contact angles of carbon fibers decreased after anodic oxidation treatment, which indicated that the wettability of carbon fibers increased slightly with the decrease of the strength and the dispersion of the carbon fibers slightly. After the surface treatment, the contact angles increased to a certain extent with the increase of the contact angle Continue to decline, discreteness continues to increase. Two kinds of different indexes of Weber modulus, which are obtained by the strength CV value and the Weber distribution fitting strength, are used to characterize the strength dispersion of the surface treated carbon fiber. The consistency of the two methods is good.