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Catechol‐based co‐deposited carbon fiber surfaces for enhancement of fiber/epoxy composites
Polymer Composites ( IF 4.8 ) Pub Date : 2020-06-15 , DOI: 10.1002/pc.25679 Mengjie Zhang 1 , Liu Liu 1 , Lin Jin 1 , Lihao Sun 1 , Ming Li 1 , Lei Shang 1 , Yu Liu 1 , Yuhui Ao 1
Polymer Composites ( IF 4.8 ) Pub Date : 2020-06-15 , DOI: 10.1002/pc.25679 Mengjie Zhang 1 , Liu Liu 1 , Lin Jin 1 , Lihao Sun 1 , Ming Li 1 , Lei Shang 1 , Yu Liu 1 , Yuhui Ao 1
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To improve interfacial adhesion between carbon fiber (CF) and epoxy resin, a low‐cost and environment‐friendly method was developed to treat the CF surface via the bio‐inspired co‐deposition of catechol (Cc) and polyethyleneimine (PEI). It is noteworthy that the deposition process reacts at room temperature with water as solvent, and does not require harsh conditions or the use of toxic reagents. After treatment, the CF/epoxy composites were endowed with excellent mechanical properties and showed increases of 51.9% and 51.7% for flexural strength and ILSS, respectively, in comparison with unsized CF laminates. The analyses of fractured surface morphologies and strengthening mechanism of the composites indicated that the uniformly coated Cc‐PEI on the fiber surface can promote the diffusion and entanglement of the matrix molecular chains and form chemical bonding as well as π‐π stacking, thus effectively improving the interfacial adhesion. In addition, the facile process disclosed in this study can provide a new strategy to not only for CF treating but also expected to be used in the modification of other high performance fiber reinforcement and industrial applications.
中文翻译：
基于邻苯二酚的共沉积碳纤维表面，可增强纤维/环氧树脂复合材料
为了提高碳纤维（CF）与环氧树脂之间的界面粘合力，开发了一种低成本，环境友好的方法，该方法通过生物启发性邻苯二酚（Cc）和聚乙烯亚胺（PEI）的共沉积来处理CF表面。值得注意的是，沉积过程在室温下与水作为溶剂反应，不需要苛刻的条件或使用有毒的试剂。经处理后，CF /环氧树脂复合材料具有出色的机械性能，与未涂CF层压板相比，抗弯强度和ILSS分别提高了51.9％和51.7％。复合材料的断裂表面形态分析和复合材料的强化机理表明，在纤维表面均匀涂覆的Cc-PEI可以促进基体分子链的扩散和缠结，并形成化学键以及π-π堆积，从而有效地改善了界面粘附。此外，本研究中公开的简便方法不仅可以为CF处理提供新的策略，而且有望用于其他高性能纤维增强材料和工业应用的改性。
更新日期：2020-06-15
中文翻译：
基于邻苯二酚的共沉积碳纤维表面，可增强纤维/环氧树脂复合材料
为了提高碳纤维（CF）与环氧树脂之间的界面粘合力，开发了一种低成本，环境友好的方法，该方法通过生物启发性邻苯二酚（Cc）和聚乙烯亚胺（PEI）的共沉积来处理CF表面。值得注意的是，沉积过程在室温下与水作为溶剂反应，不需要苛刻的条件或使用有毒的试剂。经处理后，CF /环氧树脂复合材料具有出色的机械性能，与未涂CF层压板相比，抗弯强度和ILSS分别提高了51.9％和51.7％。复合材料的断裂表面形态分析和复合材料的强化机理表明，在纤维表面均匀涂覆的Cc-PEI可以促进基体分子链的扩散和缠结，并形成化学键以及π-π堆积，从而有效地改善了界面粘附。此外，本研究中公开的简便方法不仅可以为CF处理提供新的策略，而且有望用于其他高性能纤维增强材料和工业应用的改性。
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