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Fabrication of transparent clay-polymer hybrid coatings on PET film to enhance flame retardancy and oxygen barrier properties.

Authors :
Meng, Xiaowei
Qi, Peng
Sun, Jun
Li, Hongfei
Zhang, Sheng
Liu, Xiaodong
Gu, Xiaoyu
Source :
Progress in Organic Coatings. Oct2020, Vol. 147, pN.PAG-N.PAG. 1p.
Publication Year :
2020

Abstract

• A multifunctional coating composed by montmorillonite (MMT)/Laponite (LAP) / polyvinyl alcohol (PVA) was developed. • MMT platelets and LAP rods synergistically formed more compact coating with little cracks. • MMT/LAP/PVA coating gave little attenuation on transparency of PET film. • MMT/LAP/PVA coating with around 800 nm thickness significantly improved fire resistance and oxygen barrier of PET film. A multifunctional nanocoating, consisting of montmorillonite (MMT) / laponite (LAP) / polyvinyl alcohol (PVA), was deposited onto the surface of polyethylene terephthalate (PET) film via a facile co-assembly process. As a result, the PVA/LAP/MMT coating endowed PET film with improved flame retardancy and oxygen barrier. At 4 layers deposition of PVA/LAP/MMT, the film maintained more than 90% transmittance to the visible light. The microscale combustion calorimetry revealed, compared with control PET sample, the peak of heat release rate and total heat release of PET@(MMT/LAP/PVA) 4 sample were reduced by 67.4% and 45.3%, respectively. The oxygen transmission rate significantly reduced at the same time. The reason was speculated at the combination of MMT and LAP, a more compact shielding layer was formed on the PET substrate. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
03009440
Volume :
147
Database :
Academic Search Index
Journal :
Progress in Organic Coatings
Publication Type :
Academic Journal
Accession number :
145496073
Full Text :
https://doi.org/10.1016/j.porgcoat.2020.105788