Enhanced Dispersion of Graphene in Epoxy-Acrylic Waterborne Anticorrosion Coating: Bifunctional Ligands Linking Graphene to SiO2
Enhanced Dispersion of Graphene in Epoxy-Acrylic Waterborne Anticorrosion Coating: Bifunctional Ligands Linking Graphene to SiO2
复制标题
增强石墨烯在环氧丙烯酸水性防腐涂料中的分散：连接石墨烯和 SiO2 的双功能配体
DOI：
10.20964/2018.12.79
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发表时间：
2018-12-01
影响因子：
1.5
通讯作者：
Yang, Jingxia
中科院分区：
文献类型：
--
作者：
Guo, Lei;Jing, Lingzhi;Yang, Jingxia
通过使用双功能配体对氨基苯甲酸（PABC）将石墨烯（Gr）锚在SiO2颗粒上（标记为SiO2-PABC-Gr）来改善石墨烯的分散性。这可以避免相分离并改善石墨烯在涂层中的分散。通过傅里叶变换红外光谱（FT-IR）、扫描电镜（SEM）、X射线衍射（XRD）和拉曼光谱对材料进行了表征。环氧-丙烯酸（EA）树脂用作粘合剂，其含有COOH基团以与SiO2颗粒连接。将合成的SiO2-PABC-Gr（1wt%）分散在EA树脂中，作为低碳钢的防腐蚀保护复合涂层，采用动电位极化曲线和电化学阻抗谱（EIS）研究其耐蚀性能。结果表明，PABC成功地将石墨烯与SiO2连接在一起，将其应用于EA树脂中可显著提高涂层的防腐蚀能力，这归因于石墨烯的高分散性。
The dispersion of graphene was improved by using a bifunctional ligand p-aminobenzoic acid (PABC) to anchor graphene (Gr) to SiO2 particles (marked as SiO2-PABC-Gr). This can avoid the phase separation and improve the dispersion of graphene in coatings. The materials were characterized by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), X-ray diffraction (XRD) and Raman spectra to prove the linking structure. An epoxy-acrylic (EA) resin was used as the binder, which contained COOH groups to connect with SiO2 particles. The synthesized SiO2-PABC-Gr (1 wt%) was dispersed in EA resin and used as anticorrosion protection composite coating of low carbon steel, and the corrosion resistance was investigated by potentiodynamic polarization curve and electrochemical impedance spectroscopy (EIS). The results indicated that graphene was successfully linked to SiO2 by PABC, and the application in EA resin can significantly improve the anticorrosion ability of the coating, which can be attributed to the high dispersion of graphene.