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用功能化生物炭提高水性环氧涂料的耐腐蚀性。

Enhancing the corrosion resistance of waterborne epoxy coatings with functionalized biochar.

作者信息

Zhu Weiyue, Li Xin, Liu Xiaoyan, Bai Liang, Wang Xiaohu, Li Ao, Han Yujie, Wei Chunguang, Dong Junhui, Guo Zeyu, Liu Jun, Nan Ding

机构信息

Inner Mongolia Key Laboratory of New Materials and Surface Engineering, School of Materials Science and Engineering, Inner Mongolia University of Technology Hohhot 010051 China

College of Chemistry and Chemical Engineering, Inner Mongolia University Hohhot 010021 China.

出版信息

RSC Adv. 2024 Dec 17;14(53):39747-39758. doi: 10.1039/d4ra07421a. eCollection 2024 Dec 10.

DOI:10.1039/d4ra07421a
PMID:39691232
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11651287/
Abstract

This study utilizes discarded tree leaves as a substrate to synthesize biomass porous carbon nanosheets (PCNS) through high-temperature carbonization and pore-forming treatment, followed by functional modification using carboxymethyl chitosan (CMCS) and the corrosion inhibitor 8-hydroxyquinoline (8-HQ). The functionalized PCNS fillers were incorporated into water-based epoxy (WEP) coatings to enhance corrosion resistance. Electrochemical impedance spectroscopy (EIS) testing showed that after 60 days, WEP/PCNS@CMCS@8-HQ exhibited a low-frequency impedance of 1.7 × 10 Ω cm at the lowest frequency, with significantly improved salt spray corrosion performance compared to WEP. The study demonstrates that CMCS effectively captures Cl and acts as a repair agent, working synergistically with the external corrosion inhibitor 8-HQ to improve the dispersion of PCNS within the WEP matrix and enhance corrosion resistance. These findings indicate that green-modified PCNS offers a promising approach to improving the corrosion resistance of coatings.

摘要

本研究利用废弃树叶作为基底，通过高温碳化和成孔处理合成生物质多孔碳纳米片（PCNS），随后使用羧甲基壳聚糖（CMCS）和缓蚀剂8-羟基喹啉（8-HQ）进行功能改性。将功能化的PCNS填料加入到水性环氧（WEP）涂料中以增强耐腐蚀性。电化学阻抗谱（EIS）测试表明，60天后，WEP/PCNS@CMCS@8-HQ在最低频率下的低频阻抗为1.7×10Ω·cm，与WEP相比，其盐雾腐蚀性能显著提高。该研究表明，CMCS能有效捕获Cl并作为修复剂，与外部缓蚀剂8-HQ协同作用，改善PCNS在WEP基体中的分散性并增强耐腐蚀性。这些发现表明，绿色改性的PCNS为提高涂料的耐腐蚀性提供了一种有前景的方法。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/62fa/11651287/57b7d52c6356/d4ra07421a-f11.jpg
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