| Full text | |
| 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) | |
| FAPESP's process: | 06/50952-4 - Síntese de hidrogéis superabsorventes à base de pectina para liberação prolongada de água e insumos agrícolas |
| Grantee: | Marcos Rogério Guilherme |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |