Polyacrylamide-gelatin polymeric networks: effect of pH and gelatin concentration on the swelling kinetics and mechanical properties
| Autor: | Fausto Becerra-Bracamontes, A. Martínez-Ruvalcaba, A. González-Álvarez, J. C. Sánchez-Díaz |
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| Rok vydání: | 2009 |
| Předmět: |
food.ingredient
Materials science Polymers and Plastics Swelling capacity Polyacrylamide technology industry and agriculture Young's modulus macromolecular substances General Chemistry Condensed Matter Physics Gelatin chemistry.chemical_compound symbols.namesake food chemistry Chemical engineering Acrylamide Self-healing hydrogels Materials Chemistry symbols medicine Composite material Swelling medicine.symptom Elastic modulus |
| Zdroj: | Polymer Bulletin. 62:539-548 |
| ISSN: | 1436-2449 0170-0839 |
| DOI: | 10.1007/s00289-008-0037-4 |
| Popis: | This work presents the synthesis of polyacrylamide-gelatin (PAM-G) semi-interpenetrating hydrogels, as well as the study of the swelling capacity of this material at different pH’s, and we report its Young modulus. The hydrogels were crosslinked with N,N′-methylenebisacrylamide and synthesized at different acrylamide/gelatin weight relationship. It was observed that the swelling capacity of the hydrogels increases when the gelatin concentration is increased; while the Young modulus (at the swelling equilibrium) decreases lightly. Therefore, the gelatin has a small effect in the Young modulus, unlike its influence in the swelling ability. The swelling experiments reveal that the PAM-G hydrogels increase its swelling capacity in alkaline mediums because the presence of the hydrophobic functional groups (mainly COO−) in the gelatin structure. |
| Databáze: | OpenAIRE |
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