Post-synthesis modification of hydrogels. Total and partial rupture of crosslinks: Formation of aldehyde groups and re-crosslinking of cleaved hydrogels
| Autor: | Cecilia Ines Alvarez Igarzabal, Alexis Wolfel, Marcelo Ricardo Romero |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Polymers and Plastics
Diol macromolecular substances 02 engineering and technology 010402 general chemistry Cleavage (embryo) 01 natural sciences Aldehyde chemistry.chemical_compound Polymer chemistry Materials Chemistry Organic chemistry Molecule Reactivity (chemistry) chemistry.chemical_classification Chemistry Otras Ciencias Químicas Organic Chemistry Ciencias Químicas technology industry and agriculture ALDEHYDE Periodate 021001 nanoscience & nanotechnology 0104 chemical sciences Self-healing hydrogels PERIODATE Adipic acid dihydrazide HYDROGEL MODIFICATIONS 0210 nano-technology CIENCIAS NATURALES Y EXACTAS |
| Zdroj: | Polymer. 116:251-260 |
| ISSN: | 0032-3861 |
| Popis: | Post-synthesis modification of hydrogels is frequently used for chemical functionalization, immobilization of molecules or optimization of mechanical properties. In this work, novel gels were developed usinga divinyl compound (þ) N, N0-diallyltartramide (DAT) as a crosslinking agent. DAT possesses a vicinal diol and it was found that can be selectively cleaved by reaction with periodate, obtaining aldehydes asproducts. The treatment of the gels crosslinked only with DAT leads to complete digestion of the material, obtaining a liquid as a product. The cleavage reaction in gels crosslinked with two agents, one reactive with periodate and another inert, allows modification of the crosslinking degree, maintaining the state of the gel. The change in the mechanical properties of the gels due to periodate reaction was followed by rheological studies. Furthermore, the reaction of periodate with DAT, the aldehyde obtained as a product and its reactivity with adipic acid dihydrazide (ADH) was studied by nuclear magnetic resonance (NMR) spectroscopy. Fil: Wolfel Sánchez, Alexis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto Multidisciplinario de Biología Vegetal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto Multidisciplinario de Biología Vegetal; Argentina Fil: Romero, Marcelo Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto Multidisciplinario de Biología Vegetal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto Multidisciplinario de Biología Vegetal; Argentina Fil: Alvarez Igarzabal, Cecilia Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto Multidisciplinario de Biología Vegetal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto Multidisciplinario de Biología Vegetal; Argentina |
| Databáze: | OpenAIRE |
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