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Layer-by-Layer Assembly of Nafion on Surlyn with Ultrahigh Water Vapor Barrier

Seethamraju, Sindhu and Rao, Arun D and Ramamurthy, Praveen C and Madras, Giridhar (2014) Layer-by-Layer Assembly of Nafion on Surlyn with Ultrahigh Water Vapor Barrier. In: LANGMUIR, 30 (48). pp. 14606-14611.

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Official URL: http://dx.doi.org/ 10.1021/la503302f


A layer-by-layer approach was used for the fabrication of multilayer films for ultra high gas barrier applications. The ultra high gas barrier material was designed by incorporating Nafion layer in between bilayers of poly(ethylene imine) and poly(acrylic acid) on a Surlyn substrate. When the barrier film with self-assembled Nafion is exposed to the moist environment, Nafion absorbs and desorbs water molecules simultaneously, thereby reducing the ingress of moisture in to the film. In order to study the effect of Nafion, the fabricated barrier materials with and without the presence of Nafion were tested for water vapor barrier properties. The barrier films were further used for encapsulating organic photovoltaic devices and were evaluated for their potential use in barrier applications. The devices encapsulated with the films containing Nafion exhibited better performance when subjected to accelerated aging conditions. Therefore, this study demonstrates the effectiveness of self-assembled Nafion in reducing the water vapor permeability by nearly five orders of magnitude and in increasing the lifetimes of organic devices by similar to 22 times under accelerated weathering conditions.

Item Type: Journal Article
Publication: LANGMUIR
Additional Information: Copyright for this article belongs to the AMER CHEMICAL SOC, 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited: 21 Jan 2015 06:24
Last Modified: 21 Jan 2015 06:24
URI: http://eprints.iisc.ac.in/id/eprint/50726

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