Spray-coated barrier coating on copper based on exfoliated vermiculite sheets

Limei Liu*, Zhi Long Yu, Junle Qu, Jiaxing Huang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


High-temperature barrier coatings protect metals and alloys from oxidization, delay property degradation and increase their service lifetime. Here we demonstrate a vermiculite clay-based oxidation-resistant coating on metal, using copper as an example. Dispersions of few-layer vermiculite sheets with lateral dimension in the range of microns to tens of microns are obtained in a two-step mechanical-chemical exfoliation approach, using vermiculite mineral as the starting material. The dispersion of these high aspect ratio two-dimensional sheets can be directly spray-coated on Cu foils to form a continuous and transparent thermal barrier film without the need for any binder materials. After heating in air at 400 °C for 24 h, vermiculite protected Cu foils did not show any significant sign of oxidation or degradation in mechanical and electrical properties, while uncoated Cu foils were completely destroyed.

Original languageEnglish (US)
Pages (from-to)4658-4663
Number of pages6
JournalMaterials Chemistry Frontiers
Issue number12
StatePublished - Jun 21 2021

ASJC Scopus subject areas

  • General Materials Science
  • Materials Chemistry


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