20.500.12556/DiRROS-15855 Freeze-casting of highly porous cellulose-nanofiber-reinforced γ-Al2O3 monoliths Freeze-casting is a powerful consolidation technique for the fabrication of highly porous and layered-hybrid materials, including ceramic-metal composites, and porous scaffolds for catalysis, bone substitutes and high- performance membranes. The aqueous suspensions to be freeze-casted usually contain dense particles facilitating macroporous, layered ceramics with dense (nonporous) struts. In the present study, hierarchical macro-mesoporous alumina (HMMA) monoliths were successfully prepared by freeze-casting of aqueous suspensions containing hierarchically-assembled, mesoporous γ‒Al2O3 (MA) powder and cellulose nanofibers (CNF). As- prepared monoliths were ultra-porous (93.1–99.2%), had low densities (0.01–0.25 g/cm3), and displayed relatively high surface areas (91–134 m2/g), but were still remarkably rigid with high compressive strengths (up to 52 kPa). Owing to the columnar porosity and mesoporous nature of the struts the freeze-casted HMMA monoliths exhibited high permeability and high thermal insulation, the latter ranging from 0.039 W/m∙K to 0.071 W/m∙K, depending on pore orientation. cellulose nanofiber freeze-casting gamma alumina hierarchical porosity insulative materials true false true Elsevier Ltd Angleški jezik Ni določen © 2021 The Author(s). Published by Elsevier Ltd on behalf of European Ceramic Society. Neznano 2022-11-30 12:15:54 2023-05-09 08:48:21 2023-05-10 03:34:56 0000-00-00 00:00:00 2021 0 0 Nasl. z nasl. zaslona; Opis vira z dne 12. 2. 2021; str. 1-10 Vol. 5 Mar. 2020 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2021-02-11 620.3 2666-5395 10.1016/j.oceram.2021.100069 51386371 https://www.sciencedirect.com/science/article/pii/S2666539521000158?via%3Dihub Odprti dostop 1 f9135fef-7097-11ed-a69a-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=20972 RAZ_Hudelja_Hermina_2021.pdf RAZ_Hudelja_Hermina_2021.pdf 1 38F7096B7851E4E95D229B94C913FF35 014c859d657eca6d9218d0d6eb214032446d46a8ec41451aba9639fa016fe5a0 0065f6c8-9894-11ed-b359-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=21405 RAZ_Hudelja_Hermina_2021.docx RAZ_Hudelja_Hermina_2021.docx 1 B175BE17D983B531416435045E7B0A1E 43d7d1d3ac4050be53c8f0f3219d1ca9b723f7d6752bacf8e30f7d568822ae53 b6d01f37-ee24-11ed-a314-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=22264 Zavod za gradbeništvo Slovenije 0 0 0