Boron nitride nanosheets as barrier enhancing fillers in melt processed composites

Shaobo Xie, Oana M. Istrate, Peter May, Sebastian Barwich, Alan P. Bell, Umar Khan, Jonathan N. Coleman*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)


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. This journal is

Original languageEnglish
Pages (from-to)4443-4450
Number of pages8
Issue number10
Publication statusPublished - 14 Mar 2015

ASJC Scopus subject areas

  • Materials Science(all)


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