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

机译:用于透明阻气膜的水解六方硼氮化物/聚合物纳米复合材料

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摘要

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.
机译:已经研究了通过层叠层(LBL)组件形成的柔性薄阻气膜。 我们第一次提出六边形氮化硼(H-BN)可以在LBL组件中使用。 当通过超声辅助水解分散在水中时,H-BN显影静电地与阳离子聚合物聚物二甲基氯化铵(PDDA)静电耦合的羟基。 该方法产生羟基官能H-BN / PDDA纳米复合材料。 纳米复合材料表现出良好的去角质和高度有序的H-BN纳米片,这导致极高的视觉透视,平均透射率为99%的可见光谱。 此外,良好的对准纳米复合材料延伸气体扩散路径,使水蒸气透过率降低至1.3×10(-2)G m(-2)d(-1)。 这里证明的简单和快速的LBL工艺可以应用于许多阻挡应用。

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