Ganesan, Kathirvel and Ratke, Lorenz (2014) Facile preparation of monolithic k-carrageenan aerogels. Soft Matter, 10, pp. 3218-3224. Royal Society of Chemistry. doi: 10.1039/c3sm52862f. ISSN 1744-683X.
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Abstract
To the best of our knowledge, it is the first study reporting the synthesis of monolithic k-carrageenan aerogels with meso- and macroporous structures, being unique in physical and chemical properties. We demonstrate a novel method to synthesize k-carrageenan aerogels in which potassium thiocyanate was used as the source of specific ions. Aerogels were characterized by envelope density analysis, scanning electron microscopy, nitrogen adsorption–desorption analysis, X-ray powder diffractometry and IR spectroscopy. By varying the concentration of k-carrageenan between 0.5 and 3 wt%, the envelope density can be linearly increased from 40 to 160 kg m�3. The sulphate functional groups in the wet gel and the specific ions are the key factors controlling the volume shrinkage of aerogels which average about 66%. The aerogels exhibit a fibrillar structure similar to cellulose aerogels. The fibril thickness was observed to be 10–15 nm and the specific surface area was about 230 m2 g�1. The existing meso- and macroporous structures were confirmed by nitrogen adsorption–desorption isotherm analysis and scanning electron microscopy. The aerogels were completely pure, free of specific ions and confirmed to be amorphous by powder X-ray diffraction. Hence, these porous materials can provide a matrix with a chelating function which can be used as a host in many applications.
Item URL in elib: | https://elib.dlr.de/89420/ | ||||||||||||
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Document Type: | Article | ||||||||||||
Title: | Facile preparation of monolithic k-carrageenan aerogels | ||||||||||||
Authors: |
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Date: | 2014 | ||||||||||||
Journal or Publication Title: | Soft Matter | ||||||||||||
Refereed publication: | Yes | ||||||||||||
Open Access: | No | ||||||||||||
Gold Open Access: | No | ||||||||||||
In SCOPUS: | Yes | ||||||||||||
In ISI Web of Science: | Yes | ||||||||||||
Volume: | 10 | ||||||||||||
DOI: | 10.1039/c3sm52862f | ||||||||||||
Page Range: | pp. 3218-3224 | ||||||||||||
Publisher: | Royal Society of Chemistry | ||||||||||||
ISSN: | 1744-683X | ||||||||||||
Status: | Published | ||||||||||||
Keywords: | Aerogel, carrageenan, surface area | ||||||||||||
HGF - Research field: | Aeronautics, Space and Transport | ||||||||||||
HGF - Program: | Space | ||||||||||||
HGF - Program Themes: | Research under Space Conditions | ||||||||||||
DLR - Research area: | Raumfahrt | ||||||||||||
DLR - Program: | R FR - Research under Space Conditions | ||||||||||||
DLR - Research theme (Project): | R - Vorhaben Integrative Studien (old) | ||||||||||||
Location: | Köln-Porz | ||||||||||||
Institutes and Institutions: | Institute of Materials Research > Aerogele | ||||||||||||
Deposited By: | Milow, Dr. Barbara | ||||||||||||
Deposited On: | 10 Jul 2014 14:52 | ||||||||||||
Last Modified: | 22 May 2025 16:20 |
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