Electropolymerization of acrylic acid on carbon fibers for improved epoxy/fiber adhesion
Electropolymerization of acrylic acid on carbon fibers for improved epoxy/fiber adhesion
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DOI：
10.1016/j.surfcoat.2017.04.039
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发表时间：
2017-07-15
影响因子：
5.4
通讯作者：
Grundmeier, Guido
中科院分区：
文献类型：
--
作者：
Bauer, Andreas;Meinderink, Dennis;Grundmeier, Guido
本研究以丙烯酸之电聚合作为碳纤维之表面处理技术。聚丙烯酸的沉积过程由Zn 2+离子的共沉积辅助。通过AFM、FT-IRRAS和XPS研究了所得沉积涂层的结构特性和最终特性，包括附着力和阻隔涂层。研究了电解液中Zn ~（2+）和缓蚀剂在聚丙烯酸电聚合过程中的作用，并将聚丙烯酸电沉积机理分为三个阶段。(1)Zn（2+）AA配合物被吸附在表面并还原为Zn。界面附近的电子过剩消耗了丙烯酸溶液中存在的抑制剂分子。(2)一旦抑制剂被耗尽，聚合物活化和生长通过从Zn 2 +-AA络合物转移电子开始。(3)通过FT-IRRAS光谱证明了电聚合膜的化学稳定性。通过剥离试验检查对复合材料的湿粘合性。湿粘附力的研究揭示了一个双重的改善粘附因子时，PM是电聚合到CFRP。(C)2017爱思唯尔B. V.保留所有权利。
This study focuses on the electropolymerization of acrylic acid as a surface technology for carbon fibers. The deposition process of the polyacrylic acid is assisted by the co-deposition of Zn2+ ions. The structural properties and final characteristics in respect of adhesion and the barrier coating of the resulting deposited coatings were investigated by means of AFM, FT-IRRAS and XPS. The role of the Zn2+ and inhibitors in the electrolyte during the electropolymerization process was established.The electrodeposition mechanism of polyacrylic acid onto surfaces can be divided up into three steps. (1) A Zn(2+)AA complex is adsorbed on the surface and reduced to Zn. The electron excess in the vicinity of the interface consumes the inhibitor molecules present in the acrylic solution. (2) Once the inhibitor has been depleted, polymer activation and growth starts through the transfer of electrons from the Zn2+-AA complex. (3) The length of the PM chains increases until the supply of electrons from the surface is hindered.The chemical stability of the electropolymerized coating was proven by FT-IRRAS spectroscopy. Wet adhesion to the composite is examined by means of a peel test. The wet adhesion studies reveal a two-fold improvement in the adhesion factor when the PM is electropolymerized onto CFRP. (C) 2017 Elsevier B.V. All rights reserved.