Synergistic modification of carbon fiber by electrochemical oxidation and sizing treatment and its effect on the mechanical properties of carbon fiber reinforced composites,Journal of Applied Polymer Science

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Synergistic modification of carbon fiber by electrochemical oxidation and sizing treatment and its effect on the mechanical properties of carbon fiber reinforced composites
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2019-05-29 , DOI: 10.1002/app.48028
Bo Wu _{1,

2} , Guo Zheng _{1,

2} , Rui Wang ₁ , Cun Zhou _{1,

2} , Yunjie Hu _{2,

3} , Jingcheng Lv _{2,

3}

Affiliation

In this article, The CF surface was modified by the synergistic modification of electrochemical oxidation and sizing treatment. Firstly, the electrochemical oxidation was carried out using fatty alcohol polyoxyethylene ether phosphate (AEOPK) as the electrolyte. The content of active groups on the modified CF surface increased by 235%. However, the strength of CF monofilament decreased due to the etching. Then, the electrochemically oxidized CFs were sized with the phosphate modified epoxy resin (PAEK). The etched defects on CF surface caused by the electrochemical oxidation were repaired by sizing agent molecules according to the AFM results. Furthermore, the spreadability of PAEK emulsion on the CF surface, the content of CF surface groups and the interaction of CFRC were characterized by using the monofilament contact angle, XPS and Raman spectroscopy. The results suggested that the synergistic modification could improve the CF surface activity, facilitate the spreading of PAEK on the CF surface, and increase the interaction between the CFs and the resin matrix. There were 20.3 and 22.6% enhancement in the breaking strength and elongation of CF monofilament. In addition, the interlaminar shear strength (ILSS) of CFRC prepared with synergistically modified CFs was increased from 12.81 to 33.04 MPa. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48028.

中文翻译：

电化学氧化和上浆处理对碳纤维的协同改性及其对碳纤维增强复合材料力学性能的影响

在本文中，通过电化学氧化和施胶处理的协同改性对CF表面进行了改性。首先，使用脂肪醇聚氧乙烯醚磷酸酯（AEOPK）作为电解质进行电化学氧化。改性CF表面上活性基团的含量增加了235％。但是，CF单丝的强度由于蚀刻而降低。然后，用磷酸盐改性的环氧树脂（PAEK）对电化学氧化的CF进行施胶。根据AFM结果，通过上浆剂分子修复了由电化学氧化引起的CF表面上的蚀刻缺陷。此外，PAEK乳液在CF上的铺展性用单丝接触角，XPS和拉曼光谱法表征了碳纳米管的表面，CF表面基团的含量和CFRC的相互作用。结果表明，协同修饰可以提高CF的表面活性，促进PAEK在CF表面的扩散，增加CF与树脂基体之间的相互作用。CF单丝的断裂强度和伸长率分别提高了20.3和22.6％。此外，通过协同改性的CFs制备的CFRC的层间剪切强度（ILSS）从12.81 MPa增加到33.04 MPa。分级为4 +©2019 Wiley Periodicals，Inc.J.Appl。Polym。科学 2019，136，48028。

更新日期：2019-05-29

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