Starch Aerogels: A Member of the Family of Thermal Superinsulating Materials
| Autor: | Tatiana Budtova, Waltraud Vorwerg, Richard Bardl, Lucile Druel |
|---|---|
| Přispěvatelé: | Publica, Centre de Mise en Forme des Matériaux (CEMEF), MINES ParisTech - École nationale supérieure des mines de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Fraunhofer Institute for Applied Polymer Research (Fraunhofer IAP), Fraunhofer (Fraunhofer-Gesellschaft), MINES ParisTech - École nationale supérieure des mines de Paris-PSL Research University (PSL)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Polymers and Plastics Retrogradation (starch) Starch Specific surface area Density Mechanical properties Bioengineering 02 engineering and technology 010402 general chemistry 01 natural sciences [SPI.MAT]Engineering Sciences [physics]/Materials Biomaterials [SPI]Engineering Sciences [physics] chemistry.chemical_compound Thermal conductivity Amylose Materials Chemistry Water treatment Dissolution ComputingMilieux_MISCELLANEOUS Aerogels Water Aerogel Thermal Conductivity Thermomechanical treatment 021001 nanoscience & nanotechnology 6. Clean water Supercritical fluid 0104 chemical sciences chemistry Chemical engineering Solvents 0210 nano-technology Gels |
| Zdroj: | Biomacromolecules Biomacromolecules, American Chemical Society, 2017, 18 (12), pp.4232-4239. ⟨10.1021/acs.biomac.7b01272⟩ |
| ISSN: | 1525-7797 1526-4602 |
| DOI: | 10.1021/acs.biomac.7b01272⟩ |
| Popis: | International audience; Starch aerogels were prepared via dissolution in water (thermomechanical treatment), retrogradation, solvent exchange, and drying with supercritical CO2. Amylose content in starches was varied from 0 to 100%. The aerogels' bulk density, morphology, specific surface area, thermal conductivity, and mechanical properties under compression were investigated. Pea starch aerogels had one of the highest specific surface area and lowest density and thermal conductivity (0.021-0.023 W/m·K), with the latter indicating that a new thermal superinsulation material was obtained. A detailed study of the influence of processing parameters on pea starch aerogels properties showed the importance of retrogradation time which decreases specific surface area and increases mechanical properties and thermal conductivity. Finally, a comparison of starch aerogel thermal conductivity with that of other bioaerogels is performed |
| Databáze: | OpenAIRE |
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