Preparation of Peelable Coating Films with a Metal Organic Framework (UiO-66) and Self-Crosslinkable Polyurethane for the Decomposition of Methyl Paraoxon
- Authors
- Long, Ngo Hoang; Park, Hee-woong; Chae, Gyeong-seok; Lee, Jung Hyun; Bae, Se Won; Shin, Seunghan
- Issue Date
- 8월-2019
- Publisher
- MDPI
- Keywords
- metal-organic framework; self-crosslinkable waterborne PU; peelable coating film; methyl paraoxon; decomposition
- Citation
- POLYMERS, v.11, no.8
- Indexed
- SCIE
SCOPUS
- Journal Title
- POLYMERS
- Volume
- 11
- Number
- 8
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/63679
- DOI
- 10.3390/polym11081298
- ISSN
- 2073-4360
- 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.
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Collections - College of Engineering > Department of Chemical and Biological Engineering > 1. Journal Articles
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