Preparation and Properties of L-Tryptophan Modified Graphene Oxide Composite Waterborne Epoxy Coatings

被引：0
|
作者：
Huang X. [1 ]
Hang J. [1 ]
Sun X. [1 ]
Jin L. [1 ]
Zheng S. [1 ]
机构：
[1] Research Center of Nano Science & Technology, Shanghai University, Shanghai
来源：
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | 2019年 / 35卷 / 10期
关键词：
Graphene oxide; L-tryptophan; Waterborne epoxy coating;
D O I：
10.16865/j.cnki.1000-7555.2019.0290
中图分类号：
学科分类号：
摘要：
The composite waterborne epoxy coatings were fabricated by dispersing L-tryptophan modified graphene oxide sheets(L-Trp/GO) into waterborne epoxy coatings at high speed. The L-tryptophan modified graphene oxide composite waterborne epoxy coating(L-Trp/GO/epoxy) was prepared through curing with polyamide hardener. The corrosion resistance performances of the sample coatings were characterized by electrochemical impedance spectroscopy, potentiodynamic polarization curve and other testing methods. The results demonstrate that L-Trp/GO/epoxy coating has the highest corrosion resistance of 2.16×107 Ω•cm2 after immersion in 3.5% NaCl solution for 15 d, nearly 3 orders of magnitude higher than that of the pure epoxy coating. Additionally, the TEM images of the L-Trp/GO/epoxy coating show that the stacked GO sheets are exfoliated to a thinner sheet structure after modified with L-Trp, contribute to dispersing GO sheets uniformly in the waterborne epoxy resin. Further, its SEM images suggest that the surface of the coating is smooth and dense, and the GO sheets adhere tightly with the matrix epoxy resin without obvious agglomeration. © 2019, Editorial Board of Polymer Materials Science & Engineering. All right reserved.
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页码：144 / 151
页数：7
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