High barrier performance of the multilayer film based on epoxy and montmorillonite

• Published in: Progress in organic coatings Vol. 126; pp. 1 - 7
• Main Authors: Rafiqul Bari, Gazi A.K.M., Park, Sumi, Shakila Parveen, A., Lee, Sohee, Kim, Haekyoung
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 01.01.2019; Elsevier BV
• Subjects: Ball milling; Barriers; Bisphenol A; Composite film; Encapsulation; Epoxy resins; Flexible; Moisture; Montmorillonite; Multilayer barrier film; Multilayers; Phenoxy resins; Polymer film; Protective coatings; Substrates; Composite film; Encapsulation; Flexible; Polymer film; Multilayer barrier film
• ISSN: 0300-9440; 1873-331X
• DOI: 10.1016/j.porgcoat.2018.10.017

•An easy and inexpensive way for flexible multilayer barrier films was proposed.•Montmorillonite (MMT) layered inorganic was used for barrier film.•An addition of MMT enhanced the tensile strength and resistance to acid and basic solution.•The multilayer film with MMT exhibited the 0.67% moisture permeation of PET. A flexible organic device needs a protective encapsulating layer to resist degradation of the device due to environmental oxygen and moisture. The performance of organic devices degrades with time due to a self-process of delamination and oxide formation of the cathode by environmental oxygen and moisture for electrochemical processes. Here, a flexible multilayer barrier film, which is a sandwiched composite layer with organic layers, has been fabricated in an inexpensive way under atmospheric conditions using an applicator on PET substrate. An organic layer (POL) consists of bisphenol A-type phenoxy resin and epoxy resin. For the middle composite layer (MMT), a composite with montmorillonite has been used as an interactive barrier. The multilayer film with ball-milled montmorillonite 2% composite layer shows lower moisture permeation rate of 2.850 × 10−2 gm−2day-1 than only POL on PET substrate. Fabrication of flexible multilayer barrier film from solution has promising industrial prospects due to facile processing at low temperatures.