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Mechanical characterization of cellulose aerogels

Zinke, Max and Aney, Shivangi and Schestakow, Maria and Rege, Ameya Govind (2023) Mechanical characterization of cellulose aerogels. Workshop on Aerogels Characterization and Modelling, 2023-03-29 - 2023-03-31, Debrecen, Ungarn.

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Due to dwindling fossil resources, biobased cellulose aerogels, whose three-dimensionally structured networks are characterized by nanoscale fibrils, have been of particular interest in recent years. They can be produced by bringing the polymer chains into solution and subsequent regeneration processes and offer the low density and thermal conductivity typical of aerogels. Their bulk properties depend on their nano and microstructure, which is influenced by their manufacturing process [1]. For practical applications of cellulose aerogels, insights into their elastic and inelastic mechanical properties are desired. To the best of our knowledge, the reports in the literature merely describe the stress-strain curves under monotonic uniaxial compressive loading [2] without exploring the inelastic features. This work aims at extending the state of the art knowhow on mechanical characterization of cellulose aerogels within this context. For this purpose, cellulose aerogels having different cellulose concentrations synthesized using ZnCl2 as solvent, salt hydrate routine [3] were subjected to an intensive mechanical characterization. This included quasi static compression and tensile tests, which for the first time allow a detailed characterization of their strain dependent elastic as well as inelastic properties. Furthermore, the results will be illustrated in the context of computational design of their microstructure with already established approaches [4] to better investigate structure property relations in the future. REFERENCES [1] Rege A, Schestakow M, Karadagli I, Ratke L, Itskov M, Micro mechanical modelling of cellulose aerogels from molten salt hydrates, Soft Matter. 12(34),7079-88, 2016. [2] Buchtova N, Pradille C, Bouvard JL, Budtova T, Mechanical properties of cellulose aerogels and cryogels, Soft Matter, 15, 7901-8, 2019. [3] Schestakow M, Karadagli I, Ratke L, Cellulose aerogels prepared from an aqueous zinc chloride salt hydrate melt, Carbohydrate Polymers, 137, 642-9, 2016. [4] Aney S, Rege A, The effect of pore sizes on the elastic behaviour of open porous cellular materials, Mathematics and Mechanics of Solids, 0(0), 2022.

Item URL in elib:https://elib.dlr.de/195238/
Document Type:Conference or Workshop Item (Poster)
Title:Mechanical characterization of cellulose aerogels
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Rege, Ameya GovindUNSPECIFIEDhttps://orcid.org/0000-0001-9564-5482UNSPECIFIED
Date:29 March 2023
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
EditorsEmailEditor's ORCID iDORCID Put Code
Keywords:Biobased Aerogels, Cellulose, Mechanical characterization, Inelastic properties
Event Title:Workshop on Aerogels Characterization and Modelling
Event Location:Debrecen, Ungarn
Event Type:international Conference
Event Start Date:29 March 2023
Event End Date:31 March 2023
Organizer:University of Debrecen
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Road Transport
DLR - Research area:Transport
DLR - Program:V ST Straßenverkehr
DLR - Research theme (Project):V - FFAE - Fahrzeugkonzepte, Fahrzeugstruktur, Antriebsstrang und Energiemanagement
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Aerogels and Aerogel Composites
Deposited By: Zinke, Max
Deposited On:26 Jun 2023 10:07
Last Modified:24 Apr 2024 20:55

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