Mussel-inspired Self-assembly into Polymer Coatings of Different Molecular Weight Electrolytes for Enhanced Self-healing and Corrosion Properties.

Autor: Zhang M; School of Materials Science and Engineering, Changchun University of Technology, Changchun, 130012, China.; Key Laboratory of Advanced Structural Materials, Changchun University of Technology, Ministry of Education, Changchun, 130012, China., Yu X; School of Materials Science and Engineering, Changchun University of Technology, Changchun, 130012, China.; Key Laboratory of Advanced Structural Materials, Changchun University of Technology, Ministry of Education, Changchun, 130012, China., Sheng M; School of Materials Science and Engineering, Changchun University of Technology, Changchun, 130012, China.; Key Laboratory of Advanced Structural Materials, Changchun University of Technology, Ministry of Education, Changchun, 130012, China., Chen H; School of Materials Science and Engineering, Changchun University of Technology, Changchun, 130012, China.; Key Laboratory of Advanced Structural Materials, Changchun University of Technology, Ministry of Education, Changchun, 130012, China.
Jazyk: angličtina
Zdroj: Chemistry, an Asian journal [Chem Asian J] 2023 Sep 15; Vol. 18 (18), pp. e202300432. Date of Electronic Publication: 2023 Sep 08.
DOI: 10.1002/asia.202300432
Abstrakt: Self-healing coatings offer tremendous application prospects in the field of preventing metal corrosion because of their superior functionality. The coordination of barrier performance and self-healing ability, however, continues to be difficult. Herein, a polymer coating based on polyethyleneimine (PEI) and polyacrylic acid (PAA) with self-repairing and barrier ability was designed. Introducing the catechol group into the anti-corrosion coating increases the adhesion and self-healing efficiency of the coating, providing a guarantee for the long-term stable bonding between the anti-corrosion coating and the metal substrate. Small molecular weight PAA polymers are added to polymer coatings to increase their self-healing capabilities and corrosion resistance. Because layer-by-layer assembly creates reversible hydrogen bonds and electrostatic bonds that help the coating repair itself when it is damaged, and because the traction of small molecular weight polyacrylic acid speeds up this process. When polyacrylic acid (PAA) with a molecular weight of 2000 was present in the coating at a concentration of 1.5 mg/mL, the coating's self-healing capability and corrosion resistance were at their peak. The PEI-C/PAA 45W -PAA 2000 coating completed the self-healing within 10 min, and the corrosion resistance efficiency (P e ) was as high as 90.1 %. The polarization resistance (R p ) was maintained at 7.67×10 4  Ω cm 2 after immersion for more than 240 h. It was better than other samples in this work. The polymer provides a new idea for the prevention of metal corrosion.
(© 2023 Wiley-VCH GmbH.)
Databáze: MEDLINE
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