Million-Fold Decrease in Polymer Moisture Permeability by a Graphene Monolayer

Seetharnraju, Sindhu and Kumar, Shishir and Bharadwaj, Krishna B and Madras, Giridhar and Raghavan, Srinivasan and Ramamurthy, Praveen Chandrashekarapura (2016) Million-Fold Decrease in Polymer Moisture Permeability by a Graphene Monolayer. In: ACS Nano, 10 (7). pp. 6501-6509.

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Abstract

Flexible, transparent, and moisture-impermeable materials are critical for packaging applications in electronic, food, and pharmaceutical industries. Here, we report that a single graphene layer embedded in a flexible polymer reduces its water vapor transmission rate (WVTR) by up to a million-fold. Large-area, transparent, graphene-embedded polymers (GEPs) with a WVTR as low as 10(-6) g m(-2) day(-1) are demonstrated. Monolayered graphene, synthesized by chemical vapor deposition, has been transferred onto the polymer substrate directly by a very simple and scalable melt casting process to fabricate the GEPs. The performances of the encapsulated organic photovoltaic (OPV) devices do not vary even after subjecting the GEPs to cyclic bending for 1000 cycles. Accelerated aging studies of working OPV devices encapsulated in the GEPs show a 50% lifetime of equivalent to 1 000 000 min, which satisfies the requirements of organic electronics.

Item Type:	Journal Article
Publication:	ACS Nano
Additional Information:	Copy right for this article belongs to the AMER CHEMICAL SOC, 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
Department/Centre:	Division of Mechanical Sciences > Chemical Engineering Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy) Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited:	08 Oct 2016 05:22
Last Modified:	08 Oct 2016 05:22
URI:	http://eprints.iisc.ac.in/id/eprint/54701

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