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Novel bi-functional RGO-HPSE-Zn@epoxy nanocomposite with superior corrosion protection potency
Journal of Industrial and Engineering Chemistry ( IF 6.1 ) Pub Date : 2021-12-25 , DOI: 10.1016/j.jiec.2021.12.022
Amir Hossein Mostafatabar 1 , Ghasem Bahlakeh 1 , Bahram Ramezanzadeh 2
Affiliation  

Recently, the employment of organic coatings (i.e. Epoxy resin (EP)), become common to provide immunity for metals in corrosive environments. The lack of self-healing/active protection in EP, as well as short-term barrier performance, inspired authors to provide superior barrier/self-healing protection potential for EP by designing a highly durable control-release system based on a novel composite metal–organic polymeric matrix. Therefore, in this work, first, the graphene oxide nanosheets were synthesized (GO), then reduced and also functionalized by the extracted bio-compatible organic-based molecules of Heracleum persicum seed (RGO-HPSE), and finally modified via zinc metal cations doping (RGO-HPSE-Zn). The successful synthesis of nano-pigments was characterized, applying a variety of analyses. Further, the electrochemical approaches were employed for solution-phase investigation and demonstrated 66% and 86% anti-corrosion capability for RGO-HPSE and RGO-HPSE-Zn, respectively. Afterward, 0.2 wt.% of nano-pigments were incorporated into the EP coating network to provide active self-healing performance and enhance the barrier behavior of the EP coating. Applying EIS technique, the coatings were evaluated in two forms of scratched and intact. The 83,973 ohm.cm2 and 122,412 ohm.cm2 of impedance values were achieved from the scratched RGO-HPSE/EP and RGO-HPSE-Zn/EP coatings, respectively, while the maximum impedance values of scratched neat EP was recorded at 35,673 ohm.cm2. The superior barrier performance of RGO-HPSE-Zn/EP intact coating was achieved through negligible descend of |Z|10mHz value during 10 weeks of immersion (1010.5 ohm.cm2 → 1010.2 ohm.cm2).



中文翻译:

新型双功能 RGO-HPSE-Zn@epoxy 纳米复合材料,具有卓越的防腐蚀能力

最近,有机涂层(即环氧树脂(EP))的使用变得普遍,以在腐蚀性环境中为金属提供免疫力。EP 缺乏自愈/主动保护以及短期阻隔性能,激发作者通过设计基于新型复合金属的高度耐用的控释系统为 EP 提供卓越的阻隔/自愈保护潜力-有机聚合物基质。因此,在这项工作中,首先合成了氧化石墨烯纳米片(GO),然后通过提取的白白炭疽菌的生物相容性有机基分子进行还原和功能化。种子(RGO-HPSE),最后通过锌金属阳离子掺杂(RGO-HPSE-Zn)进行改性。应用各种分析,表征了纳米颜料的成功合成。此外,电化学方法被用于溶液相研究,并分别证明了 RGO-HPSE 和 RGO-HPSE-Zn 的 66% 和 86% 的抗腐蚀能力。之后,将 0.2 wt.% 的纳米颜料掺入 EP 涂层网络中,以提供主动的自修复性能并增强 EP 涂层的阻隔性能。应用 EIS 技术,对涂层进行了划痕和完好两种形式的评估。83,973 ohm.cm 2和 122,412 ohm.cm 2分别从划伤的 RGO-HPSE/EP 和 RGO-HPSE-Zn/EP 涂层获得了阻抗值,而划伤的纯 EP 的最大阻抗值记录为 35,673 ohm.cm 2。RGO-HPSE-Zn/EP 完整涂层的优异阻隔性能是通过 |Z| 的可忽略不计下降实现的。浸泡 10 周期间的10mHz值(10 10.5 ohm.cm 2  → 10 10.2 ohm.cm 2)。

更新日期:2021-12-25
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