Construction of anticorrosive coatings with emergency response closure by introducing functionalized graphene oxide

IF 13.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Chemical Engineering Journal Pub Date : 2024-03-18 DOI:10.1016/j.cej.2024.150539

Yuxuan Huang, Shaoheng Yang, Yang Hu, Haojun Lin, Jiesheng Tang, Chang-An Xu, Zhuohong Yang

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引用次数: 0

Abstract

Vinyl ester resins (VER) are commonly used in the field of anticorrosive coatings. During the preparation and application of the coatings, it is inevitable to produce defects such as micro-porosity, micro-cracks, and scratches, which will reduce the barrier capacity of the anticorrosive coatings against corrosive media. In this paper, 2-(chloromethyl) pyridine is used to functionalize the silane-decorated graphene oxide for obtaining the functionalized modified graphene oxide (TGO). The aggregation of TGO nanosheets under the influence of Fe²⁺ ions generated by corrosion, achieving the response closure of TGO/VER coatings to hinder the diffusion path of corrosive media, thereby strengthening the anticorrosion effect of the coating. The water vapor transmission rate of TGO/VER coatings decreases significantly after immersion in Fe²⁺ solution. Electrochemical impedance spectroscopy tests indicate that TGO/VER coatings have better corrosion resistance compared with VER coatings, in which the impedance modulus after immersion for 100 d of 0.3TGO/VER coatings (3.93 × 10¹⁰ Ω cm²) is about four orders of magnitude greater than that of the VER coatings (5.85 × 10⁶ Ω cm²). The TGO/VER coatings provide the responsive closure function via complexation of TGO with Fe²⁺ to achieve the long-term corrosion resistance. These results suggest that TGO/VER system provides an effective strategy for the preparation and application of graphene-based long-term anticorrosive coatings.

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通过引入功能化氧化石墨烯构建具有应急响应封闭性的防腐涂层

乙烯基酯树脂（VER）常用于防腐涂料领域。在防腐涂料的制备和应用过程中，不可避免地会产生微孔、微裂纹和划痕等缺陷，从而降低防腐涂料对腐蚀介质的阻隔能力。本文采用 2-（氯甲基）吡啶对硅烷装饰的氧化石墨烯进行功能化处理，得到功能化改性氧化石墨烯（TGO）。TGO 纳米片在腐蚀产生的 Fe2+ 离子影响下发生聚集，实现了 TGO/VER 涂层的响应封闭，阻碍了腐蚀介质的扩散路径，从而增强了涂层的防腐效果。在 Fe2+ 溶液中浸泡后，TGO/VER 涂层的水蒸气透过率明显降低。电化学阻抗谱测试表明，与 VER 涂层相比，TGO/VER 涂层具有更好的耐腐蚀性，其中 0.3TGO/VER 涂层浸泡 100 d 后的阻抗模量（3.93 × 1010 Ω cm2）比 VER 涂层（5.85 × 106 Ω cm2）高出约四个数量级。TGO/VER 涂层通过 TGO 与 Fe2+ 的络合提供了响应封闭功能，从而实现了长期耐腐蚀性。这些结果表明，TGO/VER 系统为石墨烯基长期防腐涂层的制备和应用提供了一种有效的策略。

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来源期刊

Chemical Engineering Journal 工程技术-工程：化工

CiteScore

21.70

自引率

9.30%

发文量

6781

审稿时长

2.4 months

期刊介绍： The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.