Self-healing transparent core-shell nanofiber coatings for anti-corrosive protection

Min Wook Lee, Seongpil An, Changmin Lee, Minho Liou, Alexander Yarin, Suk Goo Yoon

Research output: Contribution to journalArticle

58 Citations (Scopus)

Abstract

Dual emulsion electrospinning is introduced to form core-shell nanofiber coatings with the self-healing agent dimethyl siloxane (DMS) and dimethyl-methyl hydrogen-siloxane (cure) separately in the cores. The coating pores are also intercalated by polymerized (cured) poly(dimethyl siloxane) (PDMS) resin as an outer matrix. If such a coating is damaged, the self-healing agents (DMS resin and cure) are released separately from the nanofiber cores and are mixed. As a result, the mixture of DMS and cure is polymerized inside a scratch or micro-crack, and the surrounding PDMS matrix is self-healed. By direct experiments, we find that such protective coatings are highly transparent (with 90% transmittance). They also self-heal fast, even when the scratch goes through the entire mat thickness, and are capable of protecting the underlying steel substrate in corrosive environments [4 wt% NaCl solution or acetic acid (99.7%)].

Original languageEnglish
Pages (from-to)7045-7053
Number of pages9
JournalJournal of Materials Chemistry A
Volume2
Issue number19
DOIs
Publication statusPublished - 2014 May 21

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ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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