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Synthesis and characterization of polyaniline–hydrotalcite–graphene oxide composite and application in polyurethane coating
RSC Advances ( IF 3.9 ) Pub Date : 2021-09-24 , DOI: 10.1039/d1ra04683g Boi An Tran 1, 2 , Huynh Thanh Linh Duong 1 , Thi Xuan Hang To 2, 3 , Thanh Thao Phan 1, 2
RSC Advances ( IF 3.9 ) Pub Date : 2021-09-24 , DOI: 10.1039/d1ra04683g Boi An Tran 1, 2 , Huynh Thanh Linh Duong 1 , Thi Xuan Hang To 2, 3 , Thanh Thao Phan 1, 2
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In this paper, a composite from polyaniline and graphene oxide-hydrotalcite hybrid (PAN–HG) was fabricated by direct polymerization of aniline using ammonium persulphate as an oxidant in the presence of a HG hybrid. The structure and morphological properties of synthesized PAN–HG composites were characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), Raman spectra, and scanning electron microscopy (SEM) techniques. The electrochemical properties of the composite particles were also analyzed by potentiodynamic polarization curves to evaluate the corrosion inhabitation. The results were calculated by Tafel fitting and showed that the effective corrosion protection values were 73.11%, 88.46%, and 95.49%, corresponding to HG, 1PAN–HG, and 2PAN–HG. The influence of PAN–HG on the corrosion protection of the polyurethane coating applied on the CT3 steel was investigated. As a result, the PU containing 0.5% of 2PAN–HG showed the most effective protection of the CT3 steel substrate. The RC of the coating was about 1.61 × 107 Ω cm2, and after immersion for 30 days, the RC value was 0.17 × 106 Ω cm2. From all the analyzed results, PAN–HG has enhanced the corrosion protection and a complicated protection mechanism was also concluded and explained.
中文翻译：
聚苯胺-水滑石-氧化石墨烯复合材料的合成、表征及在聚氨酯涂料中的应用
在本文中，聚苯胺和氧化石墨烯-水滑石杂化物 (PAN-HG) 的复合材料是通过苯胺在 HG 杂化物存在下使用过硫酸铵作为氧化剂直接聚合制备的。通过傅里叶变换红外 (FTIR) 光谱、X 射线衍射 (XRD)、拉曼光谱和扫描电子显微镜 (SEM) 技术对合成的 PAN-HG 复合材料的结构和形态特性进行了表征。还通过动电位极化曲线分析了复合颗粒的电化学性能，以评估缓蚀性。通过 Tafel 拟合计算结果表明，有效腐蚀防护值分别为 73.11%、88.46% 和 95.49%，分别对应于 HG、1PAN-HG 和 2PAN-HG。研究了 PAN-HG 对应用于 CT3 钢上的聚氨酯涂层的腐蚀防护的影响。结果，含有 0.5% 2PAN-HG 的 PU 显示出对 CT3 钢基材的最有效保护。这涂层的RC约为1.61×10 7 Ω cm 2，浸泡30天后，RC值为0.17 ×10 6 Ω cm 2。从所有的分析结果来看，PAN-HG 增强了腐蚀防护能力，并总结和解释了一个复杂的防护机制。
更新日期：2021-09-24
中文翻译：
聚苯胺-水滑石-氧化石墨烯复合材料的合成、表征及在聚氨酯涂料中的应用
在本文中，聚苯胺和氧化石墨烯-水滑石杂化物 (PAN-HG) 的复合材料是通过苯胺在 HG 杂化物存在下使用过硫酸铵作为氧化剂直接聚合制备的。通过傅里叶变换红外 (FTIR) 光谱、X 射线衍射 (XRD)、拉曼光谱和扫描电子显微镜 (SEM) 技术对合成的 PAN-HG 复合材料的结构和形态特性进行了表征。还通过动电位极化曲线分析了复合颗粒的电化学性能，以评估缓蚀性。通过 Tafel 拟合计算结果表明，有效腐蚀防护值分别为 73.11%、88.46% 和 95.49%，分别对应于 HG、1PAN-HG 和 2PAN-HG。研究了 PAN-HG 对应用于 CT3 钢上的聚氨酯涂层的腐蚀防护的影响。结果，含有 0.5% 2PAN-HG 的 PU 显示出对 CT3 钢基材的最有效保护。这涂层的RC约为1.61×10 7 Ω cm 2，浸泡30天后，RC值为0.17 ×10 6 Ω cm 2。从所有的分析结果来看，PAN-HG 增强了腐蚀防护能力，并总结和解释了一个复杂的防护机制。
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