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首页> 外文期刊>Chemical engineering journal >Mechanical and water resistance properties of chitosan/poly( vinyl alcohol) films reinforced with attapulgite dispersed by high-pressure homogenization
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Mechanical and water resistance properties of chitosan/poly( vinyl alcohol) films reinforced with attapulgite dispersed by high-pressure homogenization

机译：凹凸棒石增强均质分散的壳聚糖/聚乙烯醇薄膜的力学性能和耐水性能

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摘要

Attapulgite (APT) is a natural one-dimensional nanorod with higher mechanical strength and shows great potential as an effective reinforce filler for deriving nanocomposites. The dispersion degree and aspect ratio of APT are keys to decide the performance of nanocomposites. However, natural APT cannot develop its nanometer reinforce advantages because it usually appears as a crystal bundle or aggregate. In this work, we effectively disaggregate the crystal bundles of APT by a simple high-pressure homogenization technology at various pressures. The obtained nanometer APT as an ideal reinforce filler was introduced into chitosan (CS)/poly(vinyl alcohol) (PVA) matrix to derive a series of nanocomposites by the solution casting method. The CS/PVA/APT nanocomposites were characterized by field emission scanning electron microscopy (FESEM) and Fourier transform infrared spectroscopy (FTIR). Tests results indicated that the nanometer APT can enhance the mechanical properties and water resistance of nanocomposites more obvious than pristine APT. The nanocomposites also were shown to be highly transparent and the introduction of APT into CS/PVA matrix nearly not affected the optical property of the films.
机译：凹凸棒石（APT）是一种具有较高机械强度的天然一维纳米棒，具有作为衍生出纳米复合材料的有效增强填料的巨大潜力。 APT的分散度和长宽比是决定纳米复合材料性能的关键。但是，天然APT不能发挥其纳米增强的优势，因为它通常以晶体束或聚集体的形式出现。在这项工作中，我们通过简单的高压均质技术在各种压力下有效地分解APT的晶体束。将获得的作为理想增强填料的纳米APT引入到壳聚糖（CS）/聚乙烯醇（PVA）基质中，通过溶液浇铸法获得一系列纳米复合材料。 CS / PVA / APT纳米复合材料的特征在于场发射扫描电子显微镜（FESEM）和傅立叶变换红外光谱（FTIR）。测试结果表明，纳米APT比原始APT更能增强纳米复合材料的力学性能和耐水性。纳米复合材料还被证明是高度透明的，将APT引入CS / PVA基质几乎不会影响薄膜的光学性能。

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