Hydrolyzed hexagonal boron nitride/polymer nanocomposites for transparent gas barrier film.

Title Hydrolyzed hexagonal boron nitride/polymer nanocomposites for transparent gas barrier film.
Authors T.Young Kim; E.Ho Song; B.Hyun Kang; S.Jung Kim; Y.H. Lee; B.K. Ju
Journal Nanotechnology
DOI 10.1088/1361-6528/aa5f2e
Abstract

A flexible thin gas barrier film formed by layer-by-layer (LBL) assembly has been studied. We propose for the first time that hexagonal boron nitride (h-BN) can be used in LBL assembly. When dispersed in water through sonication-assisted hydrolysis, h-BN develops hydroxyl groups that electrostatically couple with the cationic polymer polydiallyldimethylammonium chloride (PDDA). This process produces hydroxyl-functional h-BN/PDDA nanocomposites. The nanocomposites exhibit well exfoliated and highly ordered h-BN nanosheets, which results in an extremely high visual clarity, with an average transmittance of 99% in the visible spectrum. Moreover, well aligned nanocomposites extend gas diffusion path that reduce water vapor transmission rate to 1.3 × 10(-2) g m(-2) d(-1). The simple and fast LBL process demonstrated here can be applied in many gas barrier applications.

Citation T.Young Kim; E.Ho Song; B.Hyun Kang; S.Jung Kim; Y.H. Lee; B.K. Ju.Hydrolyzed hexagonal boron nitride/polymer nanocomposites for transparent gas barrier film.. Nanotechnology. 2017;28(12):12LT01. doi:10.1088/1361-6528/aa5f2e

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