20.500.12556/RUL-167115 Comprehensive characterization of hygroscopic, fire‐retardant and thermally insulating sulfated nanocellulose aerogel Nanocellulose aerogel is an interesting class of materials that combines lightweight, high porosity, and exceptional insulating properties of aerogels with abundance, renewability, and biodegradability of cellulose. These eco-friendly materials are highly desirable in insulation applications to replace petroleum-based counterparts, thus responding to major global challenges related to climate change and resources depletion. Herein, a nanocellulose aerogel with sulfate moieties (S-NC), is prepared via functionalization of cellulose in H2SO4 /urea, followed by mechanical defibrillation and freeze-drying processes. Advanced techniques such as static and dynamic compression tests, SEM, DVS, TG-MS, XPS, and micro combustion calorimetry were used to assess S-NC characteristics and comprehend its thermal behavior. As a result of its ultra-high porosity (99.3 %), and its sulfate-half ester functional groups, the S-NC aerogel exhibits both a low thermal conductivity of 26 mW.(m·K)-1 and a pronounced flame-retardant behavior. The total heat release registered by microscale combustion calorimetry analysis is only 1.68 kJ.g−1 for the S-NC aerogel. In addition, the hygroscopicity of the aerogel was evaluated via water vapor sorption analysis and fitted to the Guggenheim-Anderson-de Boer (GAB) model, revealing a type II sorption mechanism with moisture buffering capacity of 0.63 g/g S-NC at 95 % relative humidity. The S-NC aerogel is eco-friendly material combining moisture adsorption with flame retardancy and thermal insulation, properties that are critical for safety and performance in applications vulnerable to heat and fire risks. sulfated nanocellulose aerogel flame-retardancy thermal insulation moisture adsorption sulfatirana nanoceluloza ognjevarnost toplotna izolacija adsorpcija vlage true false true Angleški jezik Slovenski jezik Članek v reviji 2025-02-10 11:02:36 2025-02-10 11:02:43 2025-02-11 04:04:56 0000-00-00 00:00:00 2025 0 0 12 str. [article no.] ǂ160236 Vol. 506 Jan. 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*8 1873-3212 10.1016/j.cej.2025.160236 225593347 RAZ_Jaouahar_Mohamed_2025.pdf RAZ_Jaouahar_Mohamed_2025.pdf 1 4C2137EFE323654C3448431BC7EC9471 761b2be372e92c982be3a6034881011add6623aebf739bdc2345ed2352ed0591 9b9397dc-e79a-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=199302 https://www.sciencedirect.com/science/article/pii/S1385894725010411 1 4ab44bae-e795-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=199301 Biotehniška fakulteta 0 0 0