Gum Arabic microgel–based biomimetic waterborne anticorrosive coatings with reinforced water and abrasive resistances

Hanlin Shao, Zhihao Chen, Jingli Chang, Xiaoshuang Yin, Yun Chen, Ying Liu, Kegui Zhang, Wenzhong Yang

科研成果: 期刊稿件文章同行评审

3 引用 (Scopus)

摘要

The inadequate water resistance and mechanical properties of waterborne anticorrosive coatings is a serious problem that leads to coating failure. When the bark of acacia trees sustains damage, the liquid Gum Arabic (GA) that oozes from the trunk coagulates at the site of injury to safeguard it, which is called “gummosis” self-protection. Inspired by this, biomimetic GA microgel–based waterborne anticorrosive coatings are designed. Microgel exhibits a crosslinked polymer network structure with a combination of advantageous characteristics derived from both solids and liquids. By encapsulating the liquid corrosion inhibitors (MeBT) within the solid microgel matrix, the coating system is endowed with self-protective capabilities. The as-prepared GAMG–MeBT microgels are introduced into waterborne epoxy (WE) matrix and sprayed onto the surface of Q235 steel. Corrosion studies reveal the 3.0-wt% GAMG–MeBT/WE coating exhibits an impedance modulus value in the low-frequency region (Z0.01Hz) of 1.37 × 109 Ω cm2 after immersing in 3.5-wt% NaCl solution for 60 days, which is nearly two orders of magnitude higher than that of the pure WE coatings. Moreover, the coatings display improved water resistance, enhanced abrasive resistance, and active corrosion protection. This work provides a new approach to solving the failure of WE anticorrosive coatings.

源语言英语
文章编号122408
期刊Carbohydrate Polymers
342
DOI
出版状态已出版 - 15 10月 2024

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