| 引用本文: | 李烨,肇研,孙沛,段跃新.碳纤维表面状态对其复合材料界面性能的影响[J].材料科学与工艺,2014,22(2):86-91.DOI:10.11951/j.issn.1005-0299.20140215. |
| LI Ye,ZHAO Yan,SUN Pei,DUAN Yuexin.Effect of carbon fiber surface characteristics on the micro-interfacial properties of its reinforced composites[J].Materials Science and Technology,2014,22(2):86-91.DOI:10.11951/j.issn.1005-0299.20140215. |
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| 摘要: |
| 为了研究上浆剂和湿热处理对复合材料微观界面性能的影响,通过单丝断裂实验测试去浆处理及湿热处理前后T300、T700SC、T800S碳纤维单丝/环氧树脂体系的界面剪切强度(IFSS),结合扫描电镜测试手段分析了纤维表面物理特性对IFSS的影响.结果表明:去浆及湿热处理均会引起三种单丝复合材料体系IFSS降低,断点形貌由X状向鞘状发生变化,但不同的单丝复合体系IFSS降幅以及断点形貌变化程度不同；去浆后,T700SC/环氧树脂体系IFSS降幅达70.67%,T300/环氧树脂体系仅下降6.05%；湿热处理72 h后,T300/环氧树脂体系IFSS下降幅度最小；湿热作用下,去浆后的单丝/环氧树脂体系IFSS的下降更为显著. |
| 关键词: 界面 单丝断裂法 光弹花样 去浆 湿热 |
| DOI：10.11951/j.issn.1005-0299.20140215 |
| 分类号:TB332 |
| 基金项目: |
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| Effect of carbon fiber surface characteristics on the micro-interfacial properties of its reinforced composites |
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LI Ye, ZHAO Yan, SUN Pei, DUAN Yuexin
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(School of Material Science and Engineerng, Beihang University, Beijing 100191, China)
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| Abstract: |
| To study the influence of desizing and hygrothermal aging on micro-interface property of composites, interfacial shear strength (IFSS) of carbon fiber T300, T700SC, T800S/epoxy resin monofilament composite before and after desizing and hygrothermal aging were tested by using single fiber fragmentation test(SFFT), and the surface characterization was undertaken by SEM . The results show that IFSS of carbon fibre filament/epoxy composites decreases and birefringence pattern of breakpoints changes from X-shaped to sheath after desizing or hygrothermal aging. After desizing, IFSS of T700SC/epoxy decreases by 70.67%, while that of T300/epoxy decreases by only 6.05%. IFSS of composites with T300 also decreases the least after hygrothermal treatment. Desizing also can accelerate the damage of interface in hygrothermal environment. |
| Key words: interface single fiber fragmentation test birefringence pattern desizing hygrothermal environment |
