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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Porous nanocomposite hydrogel of vinyled montmorillonite-crosslinked maltodextrin-co-dimethylacrylamide as a highly stable polymer carrier for controlled release systems

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Author(s):
Guilherme, Marcos R. [1] ; Fajardo, Andre R. [2] ; Moia, Thais A. [2] ; Kunita, Marcos H. [2] ; Goncalves, Maria do Carmo [3] ; Rubira, Adley F. [2] ; Tambourgi, Elias B. [1]
Total Authors: 7
Affiliation:
[1] Univ Estadual Campinas, Fac Engn Quim, Dept Sistemas Quim & Informat, BR-13081970 Campinas, SP - Brazil
[2] Univ Estadual Maringa, Dept Quim, BR-87020900 Maringa, PR - Brazil
[3] Univ Estadual Campinas, Inst Quim, BR-13083970 Campinas, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: EUROPEAN POLYMER JOURNAL; v. 46, n. 7, p. 1465-1474, JUL 2010.
Web of Science Citations: 26
Abstract

Nanocomposite hydrogel consisting of dispersed montmorillonite-crosslinked maltodextrin-co-dimethylacrylamide (malt-dex-co-DMAAm) as a highly stable device was developed. Carbon-carbon pi-bonds issued from glycidyl methacrylate (GMA) were incorporated onto both the MMT (MMT-pi) and the malt-dex (malt-dex-pi) structures. The nanocomposite copolymer hydrogel was processed via radical crosslinking reaction of malt-dex-pi with MMT-pi in the presence of DMAAm. The radical reaction of the carbon-carbon pi-bonds at the MMT-pi was verified by treating the MMT-pi with sodium persulfate. There was an excellent dispersion of the MMT-pi at the interior of the matrix even after the nanocomposite hydrogel being swollen, demonstrating that the developed methodology can imprint stability of mineral nanoparticles into a porous polymer network preventing diffusion of water-bonded silicate platelets toward the outside matrix. The water absorption profile became more dependent on the polymer relaxation for mineral-loader nanocomposite hydrogels. Higher water absorption had an impact on reduction of elasticity modulus due to softer polymer network in swollen state. (C) 2010 Elsevier Ltd. All rights reserved. (AU)