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

作者：Kim Tan Young; Song Eun Ho; Kang Byung Hyun; Kim Se Jung; Lee Yun Hi^*; Ju Byeong Kwon^*

来源：Nanotechnology, 2017, 28(12): 12LT01.

DOI：10.1088/1361-6528/aa5f2e

• gas barrier
• water vapor transmission rate (WVTR)
• oxygen transmission rate (OTR)
• hydroxyl-functional hexagonal boron nitride nanosheets (OH-BNNS)
• transparency
• layer by layer

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 x 10(-2) g m(-2) d(-1). The simple and fast LBL process demonstrated here can be applied in many gas barrier applications.

• 出版日期2017-3-24