CF 表面低聚倍半硅氧烷涂层对复合材料界面性能影响

张学忠; 黄玉东; 王天玉; 胡立江

CF 表面低聚倍半硅氧烷涂层对复合材料界面性能影响

哈尔滨工业大学理学院应用化学系, 哈尔滨 150001

基金项目: 国家自然科学基金重点项目(50333030) ; 黑龙江省杰出青年科学基金(JC04-12)

详细信息

通讯作者:
黄玉东, 教授, 博士生导师, 主要从事复合材料界面改性研究; 会员证号: E63060005GJ 　E-mail : huangyd @hit . edu. cn

中图分类号: TB332
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出版历程
- 收稿日期: 2005-01-20
- 修回日期: 2005-04-27
- 刊出日期: 2006-02-14

Influence of oligomeric silsesquioxane coatings treatment on theinterfacial property of CF/ PAA composites

Department of Applied Chemistry| Science of School| Harbin Institute of Technology| Harbin 150001| China

摘要

摘要: 采用不同倍半硅氧烷(SSO) ( YGO-SSO 和Methacryl isobutyl-POSS) 涂层对碳纤维(CF) 改性, 有效地提高了碳纤维/ 聚芳基乙炔(CF/ PAA) 的层间剪切强度( ILSS) 。采用原子力显微镜(AFM) 以力调制模式对CF/ PAA复合材料横截面进行表面形貌和硬度分布研究, 通过对硬度图像进行统计学分析得到纤维、界面相、基体相硬度分布直方图和线分布图, 对不同涂层、同种涂层不同浓度改性后的复合材料界面相特性进行了比较和研究。结果表明, 不同结构、不同浓度SSO 涂层处理对界面的改性效果不同, 含大有机官能团的笼型倍半硅氧烷(MethacrylisobutylPOSS) 的改性效果好。AFM 分析直观地表明, 经不同结构SSO 涂层处理后CF/ PAA 复合材料中出现不同形貌结构、不同硬度的界面过渡层,该界面层提高纤维/ 树脂的粘接。
- 倍半硅氧烷 /
- 碳纤维 /
- 聚芳基乙炔 /
- 界面相
Abstract: Carbon fibers (CF) were modified with different oligomeric silsesquioxane ( SSO) coatings to improvethe interfacial property of carbon fibers/ polyarylacetylene (CF/ PAA) . The interlaminar shear st rength ( ILSS) ofCF/ PAA was tested to make out the effect of t reatment . Atomic force microscopy (AFM) in the force modulationmode was adopted to study the cross-section surface of unidirectional CF/ PAA composites and the relative stiffnessof various phases , including CF , interphase and resin. Probability histogram and line dist ributing of CF/ PAA crosssection surface relative stiffness , obtained from the statistical analysis of the relative stiffness image , were used tocompare and study the interface characterizations of composites. The results show that the ILSS increases effectivelyand the effect s on interfacial characterizations are different af ter the CF surface was modified with different SSOcoatings owing to the different st ructures. Cage oligomeric silsesquioxane including large organic group s (Methacrylisobutyl-POSS) has the better t reatment result . AFM observations lead to the conclusion that an interfacial t ransi2tion layer with different morphology and stiffness appears in CF/ PAA composites af ter being t reated by the SSOcoatings of different st ructures. It can be inferred that the appearance of the t ransition layer may cont ribute to theimprovement on fibre/ mat rix adhesion.
- silsesquioxane /
- carbon fiber /
- polyarylacetylene /
- interphase