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Facile preparation of monolithic κ-carrageenan aerogels

Ganesan, Kathirvel and Ratke, L. (2013) Facile preparation of monolithic κ-carrageenan aerogels. XVII International Sol-Gel Conference 2013, 25.-30.08.2013, Madrid, Spain..

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Abstract

Carrageenans are a group of naturally available anionic polysaccharides having sulfate functional groups. Due to their renewable source, ease of production, biodegradability, presence of anionic sulfate functional groups and gelling nature1, open porous materials of carrageenan may draw good attention in many applications like other polysaccharides e.g., calcium alginate, chitosan and cellulose aerogels2. Aerogels based on polysaccharides containing cationic or anionic functional groups are in great demand because they could be used as host for applications where high chemical affinity to guest atoms/molecules is essential. It is demonstrated in the literatures that carrageenan can give good chelating effect to minerals and nanoparticles in composite structures3-6. Our interest is to prepare monolithic form of κ-carrageenan aerogel. Aerogels of κ-carrageenan were successfully synthesized and their properties were investigated by envelope density analyzer, scanning electron microscopy and N2 adsorption-desorption analysis. The concentrations of κ-carrageenan were varied between 0.5 and 3 wt %. Aerogels showed volume shrinkage, 55-65 %, depending upon the concentration of κ-carrageenan. The envelope density was in the range between 42-160 kg.m-3. For all concentrations, the specific surface area of aerogels was about 225 m2.g-1. The interconnected fibrillar structures of aerogel and fibre thickness were characterized by scanning electron microscope. The pore size distribution was observed to be broad, ranging from meso- to macroporous.

Item URL in elib:https://elib.dlr.de/85230/
Document Type:Conference or Workshop Item (Poster)
Title:Facile preparation of monolithic κ-carrageenan aerogels
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Ganesan, Kathirvelk.ganesan (at) dlr.dehttps://orcid.org/0000-0002-4876-5366
Ratke, L.lorenz.ratke (at) dlr.deUNSPECIFIED
Date:2013
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Carrageenan, Aerogel, shrinkage, nano-fibre
Event Title:XVII International Sol-Gel Conference 2013
Event Location:Madrid, Spain.
Event Type:international Conference
Event Dates:25.-30.08.2013
Organizer:International Sol-Gel Society
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 - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):R - Vorhaben Materialwissenschaftliche Forschung (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space
Deposited By: Ganesan, Dr. Kathirvel
Deposited On:12 Nov 2013 10:31
Last Modified:14 Jan 2019 07:54

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