来自基什石墨的氨基改性氧化石墨烯用于增强水性环氧涂料的耐腐蚀性。

Amino-Modified Graphene Oxide from Kish Graphite for Enhancing Corrosion Resistance of Waterborne Epoxy Coatings.

作者信息

Hao Shengle, Wan Siming, Hou Shiyu, Yuan Bowen, Luan Chenhui, Nan Ding, Huang Gen, Xu Deping, Huang Zheng-Hong

机构信息

School of Chemical & Environmental Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China.

Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.

出版信息

Materials (Basel). 2024 Mar 6;17(5):1220. doi: 10.3390/ma17051220.

DOI:10.3390/ma17051220

PMID:38473690

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10933798/

Abstract

Waterborne epoxy (WEP) coatings with enhanced corrosion resistance were prepared using graphene oxide (GO) that was obtained from kish graphite, and amino-functionalized graphene oxide (AGO) was modified by 2-aminomalonamide. The structural characteristics of the GO and AGO were analyzed using X-ray diffraction (XRD), Raman spectroscopy, Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). And the anti-corrosive performance of waterborne epoxy-cased composite coatings with different addition amounts of AGO was investigated using electrochemical measurements, pull-off adhesion tests, and salt spray tests. The results indicate that AGO15/WEP with 0.15 wt.% of AGO has the best anti-corrosive performance, and the lowest frequency impedance modulus increased from 1.03 × 10 to 1.63 × 10 ohm·cm compared to that of WEP. Furthermore, AGO15/WEP also demonstrates the minimal corrosion products or bubbles in the salt spray test for 200 h, affirming its exceptional long-term corrosion protection capability.

摘要

采用从石墨尾矿中获得的氧化石墨烯（GO）制备了具有增强耐腐蚀性的水性环氧（WEP）涂料，并用2-氨基丙二酰胺对氨基功能化氧化石墨烯（AGO）进行了改性。利用X射线衍射（XRD）、拉曼光谱、傅里叶变换红外光谱（FT-IR）、扫描电子显微镜（SEM）和透射电子显微镜（TEM）分析了GO和AGO的结构特征。并通过电化学测量、拉开法附着力测试和盐雾试验研究了不同添加量AGO的水性环氧基复合涂层的防腐性能。结果表明，AGO含量为0.15 wt.%的AGO15/WEP具有最佳的防腐性能，与WEP相比，最低频率阻抗模量从1.03×10增加到1.63×10Ω·cm。此外，AGO15/WEP在200小时的盐雾试验中也显示出最少的腐蚀产物或气泡，证实了其优异的长期腐蚀防护能力。