| Full text | |
| Author(s): |
Gustavo F. Perotti
[1]
;
Jairo Tronto
[2]
;
Marcos A. Bizeto
[3]
;
Celly M. S. Izumi
[4]
;
Marcia L. A. Temperini
[1]
;
Ademar B. Lugão
[6]
;
Duclerc F. Parra
[6]
;
Vera R. L. Constantino
[1]
Total Authors: 8
|
| Affiliation: | [1] Univ Sao Paulo, Inst Quim, Dept Quim Fundamental, BR-05508000 Sao Paulo - Brazil
[2] Univ Fed Vicosa, Inst Ciencias Exatas & Tecnol, BR-38810000 Rio Paranaiba, MG - Brazil
[3] Univ Fed Sao Paulo, Inst Ciencias Ambientais Quim & Farmaceut, Dept Ciencias Exatas & Terra, BR-09913030 Diadema, SP - Brazil
[4] Univ Fed Juiz de Fora, Dept Quim, Nucleo Espectroscopia & Estrutura Mol, BR-36036900 Juiz De Fora, MG - Brazil
[5] Instituto de Pesquisas Energéticas e Nucleares. Centro de Química e Meio Ambiente - Brasil
[6] Ctr Quim & Meio Ambiente, Inst Pesquisas Energet & Nucl, BR-05508900 Sao Paulo - Brazil
Total Affiliations: 6
|
| Document type: | Journal article |
| Source: | Journal of the Brazilian Chemical Society; v. 25, n. 2, p. 320-330, 2014-02-00. |
| Abstract | |
Polymer-clay nanocomposites (PCN) based on cassava starch, synthetic hectorite clay and inverted sugar cane syrup (plasticizer) were prepared by solvent-assisted (casting) process producing transparent and homogeneous films. Small amounts of clay (5-15 wt.%) resulted mainly in exfoliated nanocomposites while large amounts (30 wt.%) promote the intercalated nanocomposites formation. FT-Raman bands sensitive to hydrogen bonding in starch granules are progressively shifted to lower wavenumbers as the clay content is raised. Nanocomposites show a similar thermal behavior up to 320 ºC while the biomolecule decomposition at about 500 ºC is dependent on the clay content. CO2 release at about 300 ºC (non-oxidative decomposition of polymeric chains) decreases if compared to the gas delivery at ca. 500 ºC, as the clay content is increased. Films with clay content higher than 10 wt.% show no substantial benefit for either elongation or resistance properties. (AU) | |
| FAPESP's process: | 11/50318-1 - Development of compounds with pharmacological or medicinal interest and of systems for their transport, detection and recognition in biological media |
| Grantee: | Ana Maria da Costa Ferreira |
| Support Opportunities: | Research Projects - Thematic Grants |