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首页> 外文期刊>ACS applied materials & interfaces >Aspect Ratio Control of Layered Double Hydroxide Nanosheets and Their Application for High Oxygen Barrier Coating in Flexible Food Packaging
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Aspect Ratio Control of Layered Double Hydroxide Nanosheets and Their Application for High Oxygen Barrier Coating in Flexible Food Packaging

机译:纵横比控制层状双氢氧化物纳米片及其在柔性食品包装中高氧阻挡涂层的应用

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摘要

We report a method to rationally control the aspect ratio of layered double hydroxide for use as a barrier coating for food packaging films. The reconstruction of a Mg2Al-layered double oxide (LDO) in concentrated aqueous glycine solutions produces dispersions of Mg2Al-LDH nanosheets. The nanosheet thickness decreases and diameter increases with increasing reconstruction time from 16 to 96 h. We observe a limiting nanosheet aspect ratio of ca. 336 +/- 170. These Mg2Al-LDH nanosheets can be dispersed in PVA to give a water-based dispersion that can be used to coat flexible polymeric films. Oxygen transmission rate (OTR) of a PET film decreases when the thickness of the dried coated layer increases, an OTR of <0.005 mL-m(-2).day(-1) is observed for a coating with thickness of 1175 +/- 101 nm.
机译:我们报告了一种合理控制层状双氢氧化物的纵横比用作食品包装薄膜的屏障涂层的方法。 在浓含水甘氨酸水溶液中重建Mg2Al层双氧化物(LDO)产生Mg2al-LDH纳米液的分散体。 纳米片厚度降低,随着从16至96小时的重建时间增加而增加,直径增加。 我们遵守CA的限制纳米片纵横比。 336 +/- 170.这些Mg2Al -LDH纳米片可以分散在PVA中,得到可用于涂覆柔性聚合物膜的水基分散体。 当干燥的涂层层的厚度增加时,PET膜的氧传输速率(OTR)降低,对于厚度为1175 + / /的涂层,观察到<0.005mL-M(-2).nday(-1)的OTR。 - 101 nm。

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