Preparation of peelable coating films with a metal organic framework (UiO-66) and self-crosslinkable polyurethane for the decomposition of methyl paraoxon

Ngo Hoang Long, Hee woong Park, Gyeong seok Chae, Jung Hyun Lee, Se Won Bae, Seunghan Shin

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

For the fabrication of a peelable coating material that decomposes methyl paraoxone (MPO), a nerve agent simulant, self-crosslinkable waterborne polyurethanes (PUs) containing silane groups at the ends and a metal organic framework (UiO-66) were synthesized. UiO-66 dispersed PU solutions for spray coating were prepared by controlling the amount of silane in PU and the content of UiO-66. PUs with a large amount of silane (more than 7.2 wt.%) were easily gelated by adding UiO-66 because the solution was changed from neutral (pH = 7.3) to strongly acidic (pH = 2.5). Therefore, the silane content in PUs should be carefully controlled for the fabrication of composite films. When UiO-66 was added to the PU with a silane content of 2.7 wt.%, the reinforcing effect by UiO-66 was observed up to 15.3 wt.%, but a further increase in UiO-66 content decreased both the tensile strength and the elongation. The peel strength of the PU composite films on polyethylene (PET) and glass substrates decreased with increasing UiO-66 content, but their MPO conversion increased with increasing UiO-66 content. The PU composite film with 49.5 wt.% of added UiO-66 showed the MPO conversion of 63.2% and was easily peeled off from PET and glass substrates.

Original languageEnglish
Article number1298
JournalPolymers
Volume11
Issue number8
DOIs
Publication statusPublished - 2019 Jan 1

Keywords

  • Decomposition
  • Metal-organic framework
  • Methyl paraoxon
  • Peelable coating film
  • Self-crosslinkable waterborne PU

ASJC Scopus subject areas

  • Chemistry(all)
  • Polymers and Plastics

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