کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
607547 1454578 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Structural and microstructural studies of montmorillonite-based multilayer nanocomposites
ترجمه فارسی عنوان
مطالعات ساختاری و میکرو سازه نانوکامپوزیت های چند لایه مبتنی بر مونتموریلونیت
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
چکیده انگلیسی


• Different nanocomposites are obtained with various polymers or dispersants.
• Hexametaphosphate salt and montmorillonite induce the formation of stratified films.
• Surface adsorption and intercalation are observed competitive mechanisms.

HypothesesMontmorillonite, an abundant raw material, is a good candidate to obtain textured nanocomposites. However, the resulting structure of the composite depends on the dispersant used. This work aims at investigating the effect of organic polysaccharides, namely carboxymethylcellulose (CMC) or chitosan (Ch) differing by their side groups, on the resulting structure of montmorillonite-based nanocomposites.ExperimentsThe effect of sodium hexametaphosphate and of two polysaccharide derivatives (carboxymethylcellulose and chitosan) combined with montmorillonite on the structure and microstructure of resulting composite films was investigated using particle size analysis, rheological measurements, thermogravimetric analysis, X-ray diffraction, scanning electron microscopy and flexural properties measurements of the textured films.FindingsResults showed that the film structure and microstructure depend on the additive. The high organization (and resulting toughness) of the montmorillonite/sodium hexametaphosphate films results from an exfoliated then layered microstructure, whereas the addition of polysaccharide derivatives leads to the particle agglomeration. In this case, two mechanisms are in competition: surface adsorption and intercalation between exfoliated platelets.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Colloid and Interface Science - Volume 417, 1 March 2014, Pages 152–158
نویسندگان
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