umu.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • 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
A multivariate physicochemical characterisation of technical APGs
Umeå University.
Umeå University, Faculty of Science and Technology, Department of Chemistry. (Research Group for Chemometrics)
Akzo Nobel Surface Chemistry AB, Stenungsund, Sweden.
Umeå University, Faculty of Science and Technology, Department of Chemistry. (Research Group for Chemometrics)
Show others and affiliations
(English)Manuscript (preprint) (Other academic)
Identifiers
URN: urn:nbn:se:umu:diva-2448OAI: oai:DiVA.org:umu-2448DiVA: diva2:140476
Available from: 2002-12-19 Created: 2002-12-19 Last updated: 2013-03-19Bibliographically approved
In thesis
1. Nonionic surfactants: A multivariate study
Open this publication in new window or tab >>Nonionic surfactants: A multivariate study
2002 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

In this thesis technical nonionic surfactants are studied using multivariate techniques. The surfactants studied were alkyl ethoxylates (AEOs) and alkyl polyglucosides (APGs).

The aquatic toxicity of the surfactants towards two organisms, a shrimp and a rotifer, was examined. The specified effect was lethality, LC50, as indicated by immobilisation. In a comparative study, the LC50 values obtained were used to develop two different types of model. In the log P model the toxicity was correlated to log P alone, while in the multivariate model several physicochemical variables, including log P, were correlated to the toxicity. The multivariate model gave smaller prediction errors than the log P model.

Further, the change in reactivity when a surfactant mixture was added to dissolving pulp under alkaline conditions was studied, using the amount of residual cellulose as a measure of the reactivity. Ten AEO/APG mixtures were tested, and the mixture with greatest potential was studied in more detail. An optimum in the amount of added surfactant was found that seems to coincide, according to surface tension measurements, with the CMC.

Place, publisher, year, edition, pages
Umrå: Umeå University, Department of Chemistry, Organic Chemistry, 2002. 51 p.
Keyword
AEO, APG, aquatic toxicity, cellulose reactivity, Fock, MLR, multivariate data analysis, nonionic surfactant, PCA, physicochemical properties, PLS, QSAR, surface activity, viscose
National Category
Other Basic Medicine
Identifiers
urn:nbn:se:umu:diva-12 (URN)91-7305-330-9 (ISBN)
Public defence
2002-11-16, KBC-huset, sal KB3B1, Umeå universitet, Umeå, 10:30 (English)
Opponent
Supervisors
Available from: 2002-12-19 Created: 2002-12-19 Last updated: 2010-03-11Bibliographically approved

Open Access in DiVA

No full text

Authority records BETA

Sjöström, Michael

Search in DiVA

By author/editor
Sjöström, Michael
By organisation
Umeå UniversityDepartment of Chemistry

Search outside of DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric score

urn-nbn
Total: 43 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • 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