Mixed Surface Chemistry on Carbon Fibers to Promote Adhesion in Epoxy and PMMA Polymers,Industrial & Engineering Chemistry Research

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Mixed Surface Chemistry on Carbon Fibers to Promote Adhesion in Epoxy and PMMA Polymers
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2022-01-20 , DOI: 10.1021/acs.iecr.1c04409
James D. Randall ₁ , Daniel J. Eyckens ₂ , Essi Sarlin ₃ , Sarianna Palola ₃ , Gunther G. Andersson , Yanting Yin , Filip Stojcevski ₁ , Luke C. Henderson ₁

Affiliation

Carbon fibers were surface modified using mixed grafting solutions of methyl methacrylate and glycidyl (epoxy) methacrylate in ratios of 0:100; 25:75; 50:50; 75:25; and 100:0, respectively. When evaluated in an epoxy resin, all modified fibers showed significant improvement in fiber-to-matrix adhesion. Notably, the surface-grafted polymer with blends of methyl methacrylate:glycidyl methacrylate of 0:100 and 25:75, respectively, showed a >200% improvement in adhesion relative to control fibers. When evaluated in PMMA, again significant adhesion improvements were observed, though fibers grafted with ≥25% methyl methacrylate were statistically indistinguishable. This shows that by correctly tuning the surface chemistry an optimal covalent sizing can be developed for thermoplastic and thermoset resins. As an additional benefit, a significant improvement in the treated fiber’s tensile strength and modulus was also observed.

中文翻译：

碳纤维上的混合表面化学促进环氧树脂和 PMMA 聚合物的粘附

使用比例为 0:100 的甲基丙烯酸甲酯和甲基丙烯酸缩水甘油酯（环氧）的混合接枝溶液对碳纤维进行表面改性；25:75；50:50；75:25；和 100:0，分别。在环氧树脂中进行评估时，所有改性纤维都显示出纤维与基体之间的粘合力的显着改善。值得注意的是，与对照纤维相比，甲基丙烯酸甲酯：甲基丙烯酸缩水甘油酯的混合物分别为 0:100 和 25:75 的表面接枝聚合物显示出 > 200% 的附着力改善。在 PMMA 中进行评估时，再次观察到显着的附着力改善，尽管用 ≥25% 甲基丙烯酸甲酯接枝的纤维在统计上无法区分。这表明，通过正确调整表面化学，可以为热塑性和热固性树脂开发出最佳的共价施胶剂。作为额外的好处，

更新日期：2022-02-02

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