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.
| Original language | English |
|---|---|
| Article number | 12LT01 |
| Journal | Nanotechnology |
| Volume | 28 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - 2017 Feb 21 |
Keywords
- gas barrier
- hydroxyl-functional hexagonal boron nitride nanosheets (OH-BNNS)
- layer by layer
- oxygen transmission rate (OTR)
- transparency
- water vapor transmission rate (WVTR)
ASJC Scopus subject areas
- Bioengineering
- Chemistry(all)
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering
- Electrical and Electronic Engineering