Characterization of aerogels from chemo-enzymatically oxidized galactomannans as novel polymeric biomaterials
| Autor: | Yves M. Galante, Luca Merlini, Rita Grandori, Erika Ponzini, Bianca Rossi |
|---|---|
| Přispěvatelé: | Rossi, B, Ponzini, E, Merlini, L, Grandori, R, Galante, Y |
| Rok vydání: | 2017 |
| Předmět: |
Polysaccharide oxidation
Galactomannans Materials science Polymers and Plastics Guar General Physics and Astronomy 02 engineering and technology 01 natural sciences Physics and Astronomy (all) chemistry.chemical_compound Materials Chemistry Organic chemistry chemistry.chemical_classification Laccase Polymeric biomaterial Polymers and Plastic Aqueous solution biology 010405 organic chemistry Depolymerization Organic Chemistry Sesbania Polymer 021001 nanoscience & nanotechnology biology.organism_classification 0104 chemical sciences chemistry Galactomannan Galactose Self-healing hydrogels Polymeric biomaterials 0210 nano-technology |
| Zdroj: | European Polymer Journal 93 (2017): 347–357. doi:10.1016/j.eurpolymj.2017.06.016 info:cnr-pdr/source/autori:Rossi, Bianca; Ponzini, Erika; Merlini, Luca; Grandori, Rita; Galante, Yves M./titolo:Characterization of aerogels from chemo-enzymatically oxidized galactomannans as novel polymeric biomaterials/doi:10.1016%2Fj.eurpolymj.2017.06.016/rivista:European Polymer Journal/anno:2017/pagina_da:347/pagina_a:357/intervallo_pagine:347–357/volume:93 |
| ISSN: | 0014-3057 |
| DOI: | 10.1016/j.eurpolymj.2017.06.016 |
| Popis: | Aerogels were obtained from laccase/TEMPO-oxidized galactomannans (GM) of the leguminous plants: fenugreek, sesbania and guar, with several potential applications, such as biocompatible, biodegradable "delivery systems" (DS) of active principles. Chemo-enzymatic oxidation of GM in aqueous solution caused a viscosity increase up to fifteen-fold, generating structured, elastic, and stable hydrogels, presumably due to formation of carbonyl groups from primary OH's on the polymers and subsequent establishment of hemiacetalic bonds with available free hydroxyl groups. Upon lyophilization of these hydrogels, water-insoluble aerogels were generated, capable of uptaking an aqueous solution several times their own weight. In the present paper, these aerogels were further characterized by ESI-MS after enzymatic depolymerization, scanning electron microscopy, thermal and X-ray analyses. Fenugreek confirmed to be more structured and stable compared to guar and sesbania aerogels, which is likely due to its higher amount of oxidizable galactose units linked to the mannose backbone (i.e., Gal: Man = 1:1) and, therefore, to more extensive cross-linking of the resulting elastic gel. "Characterization of aerogels from chemo-enzymatically oxidized galactomannans as novel polymeric biomaterials". Available from: https://www.researchgate.net/publication/317526733_Characterization_of_aerogels_from_chemo-enzymatically_oxidized_galactomannans_as_novel_polymeric_biomaterials [accessed Nov 23 2017]. |
| Databáze: | OpenAIRE |
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