Issue 10, 2015

Boron nitride nanosheets as barrier enhancing fillers in melt processed composites

Abstract

In this work we have used melt-processing to mix liquid-exfoliated boron–nitride nanosheets with PET to produce composites for gas barrier applications. Sonication of h-BN powder, followed by centrifugation-based size-selection, was used to prepare suspensions of nanosheets with aspect ratio >1000. The solvent was removed to give a weakly aggregated powder which could easily be mixed into PET, giving a composite containing well-dispersed nanosheets. These composites showed very good barrier performance with oxygen permeability reductions of 42% by adding just 0.017 vol% nanosheets. At low loading levels the composites were almost completely transparent. At higher loading levels, while some haze was introduced, the permeability fell by ∼70% on addition of 3 vol% nanosheets.

Graphical abstract: Boron nitride nanosheets as barrier enhancing fillers in melt processed composites

Supplementary files

Article information

Article type
Paper
Submitted
07 Dec 2014
Accepted
03 Feb 2015
First published
05 Feb 2015

Nanoscale, 2015,7, 4443-4450

Boron nitride nanosheets as barrier enhancing fillers in melt processed composites

S. Xie, O. M. Istrate, P. May, S. Barwich, A. P. Bell, U. Khan and J. N. Coleman, Nanoscale, 2015, 7, 4443 DOI: 10.1039/C4NR07228F

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