tailieunhanh - Hydrogel composite of poly(vinylalcool) with unmodified montmorillonite

The morphology of hydrogel composites and their swelling in water at different amount of Mag-Na were investigated. The characterization of obtained hydrogel composites by X-ray diffraction (XRD) showed a remarkable increase of the basal distance of Mag-Na in PVA hydrogels. | Hydrogel composite of poly vinylalcool with unmodified montmorillonite Current Chemistry Letters 6 2017 69 76 Contents lists available at GrowingScience Current Chemistry Letters homepage Hydrogel composite of poly vinylalcool with unmodified montmorillonite Fatiha Reguiegab Nabahat Sahlia and Mohamed Belbachira a Laboratory of Polymer Chemical Department of Chemistry Faculty of Exact and Applied Sciences University of Oran1 Ahmed Benbella 31100 Oran Algeria b Preparatory School in Sciences and Technology. Oran Algeria CHRONICLE ABSTRACT Article history Crosslinked poly vinylalcohol PVA hydrogel composites based on algerian hydrophilic Received August 21 2016 natural Na-montmorillonite Na-MMT nanoclay named Maghnite-Na Mag-Na were Received in revised form prepared in aqueous media without utilization of chemical crosslinking agents by repeated October 24 2016 cycles of freezing and thawing. The morphology of hydrogel composites and their swelling in Accepted 21 November 2016 water at different amount of Mag-Na were investigated. The characterization of obtained Available online hydrogel composites by X-ray diffraction XRD showed a remarkable increase of the basal 21 November 2016 distance of Mag-Na in PVA hydrogels. Therefore Intercalated and exfoliated morphology was Keywords observed for prepared composites hydrogels of PVA. The infra-red FTIR characterization Hydrogel composite PVA results showed that some interactions have been developed between the hydroxyl groups of Maghnite-Na PVA chains and Mag-Na in composite hydrogels. Introducing Mag-Na into PVA hydrogel Freezing-thawing affected their swelling. Increased amount of Mag-Na decreased the equilibrium degree of Physical crosslinking swelling and equilibrium water content. 2017 Growing Science Ltd. All rights reserved. 1. Introduction Hydrogels are three-dimensional cross-linked polymer network that can respond to the fluctuations of the environmental stimuli. These materials can .

• Hoá học
• Obtained hydrogel composites
• X ray diffraction
• Hydrogel composite of poly
• Algerian hydrophilic natural
• Hydrogels of PVA