Seethamraju, Sindhu and Ramamurthy, Praveen C and Madras, Giridhar (2013) Flexible poly(vinyl alcohol-co-ethylene)/modified MMT moisture barrier composite for encapsulating organic devices. In: RSC Advances, 3 (31). pp. 12831-12838.
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Flexible, nano-composite moisture barrier films of poly(vinyl alcohol-co-ethylene) with surface modified montmorillonite fabricated by solution casting were used to encapsulate organic devices. The composite films were characterized by FTIR, UV-visible spectroscopy and SEM imaging. Thermal and mechanical properties of the composite films were studied by DSC and UTM. Calcium degradation test was used to determine the transmission rate of water vapour through the composite films, which showed a gradual reduction from similar to 0.1 g m(-2) day(-1) to 0.0001 g m(-2) day(-1) with increasing modified montmorillonite loading in the neat copolymer. The increase in moisture barrier performance is attributed to the decreased water vapour diffusivity due to matrix-filler interactions in the composite. The accelerated aging test was carried out for non-encapsulated and encapsulated devices to evaluate the efficiency of the encapsulants. The encapsulated devices exhibited longer lifetimes indicating the efficacy of the encapsulant.
| Item Type: | Journal Article |
|---|---|
| Publication: | RSC Advances |
| Publisher: | Royal Society of Chemistry |
| Additional Information: | Copyright of this article belongs to Royal Society of Chemistry. |
| Department/Centre: | Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy) Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering |
| Date Deposited: | 20 Sep 2013 12:18 |
| Last Modified: | 20 Sep 2013 12:18 |
| URI: | http://eprints.iisc.ac.in/id/eprint/47234 |
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