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Physics-informed constitutive modelling of hydrated biopolymer aerogel networks

Külcü, İsmail Doğan and Rege, Ameya Govind (2021) Physics-informed constitutive modelling of hydrated biopolymer aerogel networks. Soft Matter, 17, pp. 5278-5283. Royal Society of Chemistry. doi: 10.1039/d1sm00430a. ISSN 1744-683X.

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Official URL: https://pubs.rsc.org/en/content/articlelanding/2021/sm/d1sm00430a/unauth#!divAbstract


Hydration induces significant structural rearrangements in biopolymer aerogels, resulting in a completely different mechanical behaviour compared to the one in the dry state. A network decomposition concept was earlier introduced to account for these changes, wherein the material network was decomposed into an open-porous aerogel one and a hydrogel-like one. Recent experimental evidences have supported this idea of the formation of a hydrogel-like network. Using these observations as a basis, in this paper, we present a micromechanical model describing the effect of hydration on the structural and mechanical properties of aerogels. The aerogel network is modelled based on the mechanics of their pore-walls, while the hydrogel-like network is modelled based on the statistical mechanics of their polymer chains by means of the Arruda–Boyce eight-chain model. The influence of diverse structural and material parameters on the mechanical behaviour is investigated. The effect of different degrees of wetting, from a pure aerogel to a pure hydrogel-like state, is captured by the model. The results are shown to be in good agreement with available experimental data.

Item URL in elib:https://elib.dlr.de/142374/
Document Type:Article
Title:Physics-informed constitutive modelling of hydrated biopolymer aerogel networks
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Külcü, İsmail DoğanUNSPECIFIEDhttps://orcid.org/0000-0001-5431-7802UNSPECIFIED
Rege, Ameya GovindUNSPECIFIEDhttps://orcid.org/0000-0001-9564-5482UNSPECIFIED
Date:17 May 2021
Journal or Publication Title:Soft Matter
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 5278-5283
Publisher:Royal Society of Chemistry
Keywords:biopolymer; aerogel; hydration; constitutive model
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 - NGC Fahrzeugstruktur II (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Aerogels and Aerogel Composites
Deposited By: Rege, Dr. Ameya Govind
Deposited On:07 Jun 2021 07:13
Last Modified:05 Dec 2023 07:46

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