OALib Journal期刊
ISSN: 2333-9721
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硅溶胶改性处理对碳纤维/环氧树脂复合材料拉伸性能的影响
Keywords: 复合材料,硅溶胶,表面改性,碳纤维,拉伸性能
Abstract:
?用溶胶-凝胶法制备硅溶胶对碳纤维进行表面改性,观测了环氧树脂液滴在单向排列碳纤维集束表面的铺展过程;以环氧树脂为基体制备单向排列的碳纤维/环氧树脂复合材料,研究了硅溶胶改性处理碳纤维对其拉伸性能的影响。结果表明:碳纤维经过硅溶胶改性处理后,si—o—si,—nh2等极性官能团的引入改善了环氧树脂对其的浸润性能,从而改善了碳纤维与环氧树脂间的界面粘结性能,使碳纤维/环氧树脂复合材料的横向拉伸强度显著改善,但纵向拉伸强度影响不大;与未经过表面处理的复合材料相比,经过硅溶胶改性处理的碳纤维/环氧树脂复合材料其横向拉伸强度提高了62.74%;与用硝酸处理的碳纤维制备的复合材料相比,用硝酸处理后再用硅溶胶处理的碳纤维所制备的复合材料,其横向拉伸强度提高了35.27%。
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