Ion-triggered calcium hydroxide microcapsules for enhanced corrosion resistance of steel bars.

ABSTRACT: Herein, we synthesized Ca(OH)₂ microcapsules with ion-responsive shells composed of cross-linked poly-ionic liquids (CPILs). By exchanging PF₆ ^- with Cl^- in water, the hydrophobic poly-ionic liquids (PILs) on the shell are converted to hydrophilic channels. The encapsulated Ca(OH)₂ can permeate through the hydrophilic channels and release OH^-. Meanwhile, the Cl^- content can be reduced. The release rate of Ca(OH)₂ is influenced by the content of monomers and concentration of Cl^- ions in water. SO₄ ^2- can also trigger the release of Ca(OH)₂ from the microcapsule. With these microcapsules, Q235 steel exhibited promising corrosion resistance in simulated seawater.

SUBMITTER: Liang Z 

PROVIDER: S-EPMC9090799 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature