Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Effects of partial dehydration and freezing temperature on the morphology and water binding capacity of carboxymethyl chitosan-based superabsorbents
University of Borås, Faculty of Textiles, Engineering and Business.
2010 (English)In: Industrial and Engineering Chemistry Research, ISSN 0196-4321, Vol. 49, no 17, p. 8094-8099Article in journal (Refereed) Published
Sustainable development
In my opinion, the content of this publication falls within the area of sustainable development.
Abstract [en]

Superabsorbent polymers (SAPs) were prepared from carboxymethyl chitosan (CMCS) cross-linked to a gel, concentrated by partial dehydration in a rotary evaporator (at 70, 85, and 100°C), frozen at -5, -20, and -196°C, and then freeze dried. A 0.9% aqueous solution of CMCS was gelled by addition of glutaraldehyde and partially dehydrated to 1.3-16.8% dry matter (DM) before freeze drying. The water binding capacity (WBC) of the products was up to 171 g/g of superabsorbent. The best results were obtained when 32-81% of the water in the gel was removed in the evaporator at 85-100°C, and the concentrated gel (1.3-4.7% DM) was frozen in liquid nitrogen at -196°C before freeze drying. On average, these SAPs, according to SEM micrographs, had a porous sponge-like structure and absorbed 35 and 32 g/g of saline and urine solutions after 10 min exposure, respectively. The corresponding WBC of two commercial polyacrylate-based SAPs was 34-57 g/g for saline and 30-37 g/g for urine solutions. 

Place, publisher, year, edition, pages
2010. Vol. 49, no 17, p. 8094-8099
Keywords [en]
Aqueous solutions, Carboxymethyl chitosan, Dry matters, Freeze drying, Freezing temperatures, Glutaraldehydes, Rotary evaporators, SEM micrographs, Spongelike structure, Super absorbent, Superabsorbent polymer, Superabsorbents, Water binding capacity, Aldehydes, Body fluids, Chitin, Chitosan, Dehydration, Dewatering, Drying, Evaporators, Liquid nitrogen, Military engineering, Solutions, Gels
National Category
Industrial Biotechnology
Research subject
Resource Recovery
Identifiers
URN: urn:nbn:se:hb:diva-14874DOI: 10.1021/ie100257sISI: 000281107800036Scopus ID: 2-s2.0-77956077591ISBN: 08885885 (ISSN) OAI: oai:DiVA.org:hb-14874DiVA, id: diva2:1236285
Available from: 2018-08-01 Created: 2018-08-01 Last updated: 2018-08-08Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full textScopus

Authority records BETA

Zamani, AkramTaherzadeh, Mohammad J

Search in DiVA

By author/editor
Zamani, AkramTaherzadeh, Mohammad J
By organisation
Faculty of Textiles, Engineering and Business
Industrial Biotechnology

Search outside of DiVA

GoogleGoogle Scholar

doi
isbn
urn-nbn

Altmetric score

doi
isbn
urn-nbn
Total: 19 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf