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Upscaling of cellulose aerogel sheets from hemp fibers

Serrador Goncalves, Bruno and Costa, Diogo and Ganesan, Kathirvel and Milow, Barbara (2023) Upscaling of cellulose aerogel sheets from hemp fibers. In: 3rd lnternational Conference on Aerogels tor Biomedical and Enviornmental Applications: Book of Abstracts, pp. 183-184. University of Maribor, University Press. 3rd lnternational Conference on Aerogels tor Biomedical and Environmental Applications, 2023-07-05 - 2023-07-07, Maribor, Slovenia. doi: 10.18690/um.fkkt.2.2023. ISBN 978-961-286-762-1.

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Official URL: https://press.um.si/index.php/ump/catalog/book/796


The aim of this work was to produce cellulose aerogel sheets from hemp-extracted cellulose by using the CaProLi® (Cellulose Aerogel Production Line) as an upscaling device. Cellulose aerogel sheets have the potential to be used as a sustainable thermal insulation material [1]. Furthermore, they can be used as a material for wound dressing and healing [2]. Two different commercial celluloses were used as references, and compared with the samples prepared from hemp fibers. In addition, they were used to investigate a useful viscosity range for the upscaling process. Suitable recipes were prepared by the addition of sodium salts. Cellulose was dissolved in a mixture of water, NaOH and urea. The samples were dried supercritically with CO2, after neutralization and solvent exchange to ethanol. The aerogels were characterized for their porosity, morphology and internal structure (BET, SEM, total pore volume and pore size distribution). Additionally, the influence was investigated of the sodium salt addition on the gelation time. The cellulose extracted from the hemp presented good quality, and the hemp cellulose aerogels showed the lowest envelope density and therefore the highest porosity of all the cellulose aerogels. The nitrogen adsorption-desorption analyses showed BET surface area values in the range of 194-288 m2/g. The effects on the reduction of the gel point in the cellulose solution were also observed with the addition of sodium salts. A continuous production process of cellulose gel sheets was established (conveyer belt speed of 0.56 cm/s) which is an important step in the up-scaling of this technology.

Item URL in elib:https://elib.dlr.de/196746/
Document Type:Conference or Workshop Item (Poster)
Title:Upscaling of cellulose aerogel sheets from hemp fibers
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Milow, BarbaraUNSPECIFIEDhttps://orcid.org/0000-0002-6350-7728UNSPECIFIED
Date:August 2023
Journal or Publication Title:3rd lnternational Conference on Aerogels tor Biomedical and Enviornmental Applications: Book of Abstracts
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 183-184
EditorsEmailEditor's ORCID iDORCID Put Code
Publisher:University of Maribor, University Press
Keywords:Aerogels; Cellulose; Hemp; Extraction; Sheets; Upscaling
Event Title:3rd lnternational Conference on Aerogels tor Biomedical and Environmental Applications
Event Location:Maribor, Slovenia
Event Type:international Conference
Event Start Date:5 July 2023
Event End Date:7 July 2023
Organizer:University of Maribor
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: Serrador Goncalves, Bruno
Deposited On:30 Aug 2023 08:16
Last Modified:24 Apr 2024 20:57

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