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Gum Arabic microgel-based biomimetic waterborne anticorrosive coatings with reinforced water and abrasive resistances.
Shao, Hanlin; Chen, Zhihao; Chang, Jingli; Yin, Xiaoshuang; Chen, Yun; Liu, Ying; Zhang, Kegui; Yang, Wenzhong.
Afiliación
  • Shao H; School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
  • Chen Z; School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China. Electronic address: chenzhihao2012@njtech.edu.cn.
  • Chang J; School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
  • Yin X; School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
  • Chen Y; School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
  • Liu Y; School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
  • Zhang K; Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment of the People's Republic of China, Nanjing 210042, China. Electronic address: zhangkegui@nies.org.
  • Yang W; School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China. Electronic address: yangwznjtech@163.com.
Carbohydr Polym ; 342: 122408, 2024 Oct 15.
Article en En | MEDLINE | ID: mdl-39048241
ABSTRACT
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.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Carbohydr Polym Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Carbohydr Polym Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido