对比分析了不同类型碳纤维与环氧树脂的接触角的变化规律,并利用Young-Dupre法和Wu法,分析了黏附功随温度的变化规律,以及树脂固化对纤维/树脂润湿、黏附作用的影响。结果表明：升高温度有利于T300、CCF、T700纤维和环氧AG80树脂的润湿,去除纤维表面上浆剂后其表面能极性分量下降,与AG80树脂的润湿和黏附性能变差;在树脂体系未发生化学反应前,AG80/DDS树脂体系比AG80纯树脂与T700纤维的润湿性能好,黏附性能差;110℃恒温条件下随固化时间延长,AG80/DDS和E51/DDS树脂体系与T700纤维的浸润和黏附性能均改善。
Contact angle between epoxy and different kinds of carbon fibers was investigated first.Work of adhesion at different temperatures was studied by means of Young-Dupre method and Wu method.The influence of resin curing on wetting and adhesive interaction of fibers and resin was then analyzed.The results show that the wetability between T300,CCF,T700 fibers and AG80 resin is improved by increasing the temperature.Comparing with the sized fibers,polar component of surface energy of the desized fibers is lower,and wetting and adhesive interaction with epoxy AG80 resin is worse.Before the chemical reaction of epoxy system starts,wetting between AG80/DDS system and T700 fiber is better than AG80 pure resin and T700 fiber,but work of adhesion is lower.And wetting and adhesive interaction between AG80/DDS,E51/DDS system and T700 fiber are improved as curing time expands at 110℃.
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