在碳纤维和树脂矩阵之间建立"刚性-柔性"过渡接口,以加强接口粘附
Han Yang1,2, Chongchong Yang1, Dandan Zhu1
1School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China.
Langmuir : the ACS journal of surfaces and colloids
|July 11, 2025
概括
研究人员在碳纤维 (CFs) 和树脂之间创建了一个"刚性-柔性"接口,增强粘合力. 这种修改显著提高了先进复合材料的强度和模量等机械性能.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
背景情况:
- 接口粘附对于复合材料性能至关重要.
- 碳纤维 (CFs) 经常表现出与聚合物矩阵的薄弱结合.
- 开发有效的接口结构是提高复合材料性能的关键.
研究的目的:
- 为了建立一个
- 刚性-灵活性 刚性-灵活性
- 碳纤维 (CFs) 和树脂矩阵之间的过渡接口结构.
- 为了提高CF增强复合材料的界面粘附性和机械性能.
- 研究功能化CF的表面特征和界面行为.
主要方法:
- 使用聚多巴胺/聚乙烯胺 (PEI) 编码的CF的表面功能化.
- 在CF表面上用化学方法将柔性聚氨 (PU) 和分支PEI聚合物的化学接种.
- 表面特性 (活性组,粗度,表面能量) 和界面粘附 (界面剪切强度,间层剪切强度) 的表征.
主要成果:
- 功能化引入了丰富的活性组 (-NH2, -NH) 并增加了表面粗性和能量.
- 界面切割强度增加了49.4%,而层间切割强度增加了43.2%.
- 由于柔性PU接口,柔性强度提高了35.5%,柔性模量提高了45.9%.
结论:
- 开发的 开发的 开发的
- 刚性-灵活性 刚性-灵活性
- 接口有效地增强CF和树脂矩阵之间的接口粘附.
- 柔性PU层作为抗撕裂元件,促进均的应力转移.
- 这一策略显著提高了碳纤维增强聚合物复合材料的整体机械性能.
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