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首页> 外文期刊>Journal of Applied Polymer Science >Influence of Surface Treatment of Carbon Fibers on Interfacial Adhesion Strength and Mechanical Properties of PLA-Based Composites
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Influence of Surface Treatment of Carbon Fibers on Interfacial Adhesion Strength and Mechanical Properties of PLA-Based Composites

机译：碳纤维表面处理对PLA基复合材料界面粘合强度和力学性能的影响

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摘要

In the present study C/PLA composites with different fiber surface condi- tions (untreated and with nitric acid oxidation for 4 hand 8 h) were prepared to determine the influence of surface treatment on the interfacial adhesion strength and mechanical properties of the composites. A chemical reaction at the fiber-matrix interfaces was confirmed by XPS studies. Nitric acid treatment was found to improve the amount of oxygen-containing functional groups (particularly the carboxylic group, -COOH) on carbon fiber surfaces and to increase the surface roughness because of the formation of longitudinal crevices. The treated composites exhibited stronger interface adhesion and better mechanical properties in comparison to their untreated counter- parts. There was a greater percentage of improvement in interfacial adhesion strength than in the mechanical properties. The strengthened interfaces and improved mechan- ical performance have been mainly attributed to the greater extent of the chemical reaction between the PLA matrix and the carbon fibers. The increased surface rough- ness also has had a slight contribution.
机译：在本研究中，制备了具有不同纤维表面条件（未经处理和硝酸氧化4手8小时）的C / PLA复合材料，以确定表面处理对复合材料的界面粘合强度和机械性能的影响。 XPS研究证实了在纤维-基质界面的化学反应。发现硝酸处理可改善碳纤维表面上含氧官能团（特别是羧基，-COOH）的数量，并由于形成纵向缝隙而增加表面粗糙度。与未处理的配对件相比，处理后的复合材料表现出更强的界面粘合力和更好的机械性能。与机械性能相比，界面粘合强度的改善百分比更大。增强的界面和改善的机械性能主要归因于PLA基质与碳纤维之间更大程度的化学反应。增加的表面粗糙度也有一点贡献。

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