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Perspectives in the modeling of biopolymer aerogel networks subject to wetting

Rege, Ameya Govind and Gurikov, Pavel and Kalmár, József and Milow, Barbara (2021) Perspectives in the modeling of biopolymer aerogel networks subject to wetting. Proceedings in Applied Mathematics and Mechanics, 20 (1), e202000170. Wiley. doi: 10.1002/pamm.202000170. ISSN 1617-7061.

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Official URL: https://onlinelibrary.wiley.com/doi/10.1002/pamm.202000170

Abstract

Alginate-based aerogels were shown to be non-cytotoxic and to feature good cell adhesion, thus drawing their attention towards tissue engineering and regenerative medicine [1]. To this end, their mechanical properties under dry as well as wet conditions were subsequently investigated [2]. Upon wetting, these aerogels showed strong stiffening in their mechanical behavior. In this work, a micromechanically motivated model approach to describe this phenomenon is proposed. The nanofibers in the aerogel network are considered to undergo structural rearrangement upon being subjected to water. Furthermore, the collapse of the micropores (pore diameter below 5 nm) results in the formation of local hydrogel-like network phase. The constitutive model is based upon the assumption that the total network can be decomposed into a hydrogel-like network and a restructured aerogel network. The aerogel network is described based on the micromechanical model proposed by Rege et al. [3], while the hydrogel-like network is modeled based on the phenomenological approach of Gent [4]. This first approach towards modeling shows reliable results against the experimental stress-strain curves of alginate-starch aerogels [5].

Item URL in elib:https://elib.dlr.de/140639/
Document Type:Article
Title:Perspectives in the modeling of biopolymer aerogel networks subject to wetting
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Rege, Ameya GovindAmeya.Rege (at) dlr.dehttps://orcid.org/0000-0001-9564-5482
Gurikov, Pavelpavel.gurikov (at) tuhh.dehttps://orcid.org/0000-0003-0598-243X
Kalmár, Józsefkalmar.jozsef (at) science.unideb.huUNSPECIFIED
Milow, BarbaraBarbara.Milow (at) dlr.dehttps://orcid.org/0000-0002-6350-7728
Date:2021
Journal or Publication Title:Proceedings in Applied Mathematics and Mechanics
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:20
DOI :10.1002/pamm.202000170
Page Range:e202000170
Publisher:Wiley
ISSN:1617-7061
Status:Published
Keywords:biopolymer aerogel, wetting, mechanical property, modeling
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
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Aerogels and Aerogel Composites
Deposited By: Rege, Dr. Ameya Govind
Deposited On:03 Feb 2021 08:08
Last Modified:03 Feb 2021 08:08

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