文献类型：期刊文献

英文题名：Fabrication of superhydrophobic bio-based polybenzoxazine/hexagonal boron nitride composite coating for corrosion protection

作者：Wang, Litong[1];Yuan, Manlin[1];Zhao, Yudi[1];Guo, Zhen[1];Lu, Xin[1];Xin, Zhong[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Dept Prod Engn, Shanghai Key Lab Multiphase Mat Chem Engn, Shanghai 200237, Peoples R China

年份：2022

卷号：167

外文期刊名：PROGRESS IN ORGANIC COATINGS

收录：;EI(收录号：20221611978534);WOS:【SCI-EXPANDED(收录号:WOS:000799018100003)】；

基金：Acknowledgements This work was financially supported by National Natural Science Foundation of China (21776080) and Innovation Program of Shanghai Municipal Education Commission (2019-01-07-00-02-E00061) .

语种：英文

外文关键词：Bio-based benzoxazine; Curing temperature; Superhydrophobic; Anti-corrosion

摘要：Superhydrophobic coatings have attracted much attention in the field of anti-corrosion due to their excellent water repellency. In this work, a superhydrophobic bio-based polybenzoxazine/hexagonal boron nitride composite coating was fabricated for the corrosion resistance of mild steel (MS). Hexagonal boron nitride (h-BN) particles were introduced into cardanol/stearylamine-based benzoxazine (C-s) to construct a rough surface and enhance the stability of the coating. Gallic acid (GA), a natural polyphenol, was used as a curing agent to catalyze the ring-opening polymerization of benzoxazine. The differential scanning calorimetry results showed that GA could reduce the curing peak temperature of C-s from 260 ?C to 173 ?C. The as-prepared superhydrophobic coating (PC-s/GA/BN), of which the static water contact angle was 158.2 +/- 2.4?, could withstand temperature treatments of-20 ?C to 250 ?C or acid/alkali immersion of pH values from 1 to 11 for 1 h. Furthermore, the PCs/GA/BN coating could still maintain outstanding corrosion resistance after being immersed in 3.5 wt% NaCl aqueous solution for 30 days. This kind of stable superhydrophobic benzoxazine-based coating has great potential in the field of anti-corrosion.