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
Surface and friction forces between grafted polysaccharide layers in the absence and presence of surfactant
Show others and affiliations
2011 (English)In: Advances in Colloid and Interface Science, ISSN 0001-8686, E-ISSN 1873-3727, Vol. 364, no 2, 351-358 p.Article in journal (Refereed)
Abstract [en]

We analyzed the interaction between chemically grafted polysaccharide layers in aqueous solutions. To fabricate such layers, an end-terminated dextran silane coupling agent was synthesized and the polydextran was grafted to oxidized silicon wafers and to silica particles. This resulted in the formation of a 28 nm thick layer (in air) and a grafted amount of 40 mg/m(2) as determined by ellipsometry. The physical properties of the grafted layer were investigated in aqueous solutions by atomic force microscope imaging and colloidal probe force measurements. Surface and friction forces were measured between one bare and one polydextran coated silica surface. A notable feature was a bridging attraction due to affinity between dextran and the silica surface. Surface interactions and friction forces were also investigated between two surfaces coated with grafted polydextran. Repulsive forces were predominant, but nevertheless a high friction force was observed. The repulsive forces were enhanced by addition of sodium dodecyl sulfate (SDS) that associates with the tethered polydextran layers. SDS also decreased the friction force. Our data suggests that energy dissipation due to shear-induced structural changes within the grafted layer is of prime importance for the high friction forces observed, in particular deformation of protrusions in the surface layer.

Place, publisher, year, edition, pages
2011. Vol. 364, no 2, 351-358 p.
Keyword [en]
Adhesion, AFM, Dextran, Ellipsometry, Friction, Polymer layer, Silane coupling agent, Silica, Surface forces, Tethered polysaccharide
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-27033DOI: 10.1016/j.jcis.2011.08.065OAI: oai:DiVA.org:ri-27033DiVA: diva2:1054037
Note
A3025Available from: 2016-12-08 Created: 2016-12-08Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text
By organisation
YKI – Ytkemiska institutet
In the same journal
Advances in Colloid and Interface Science
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar

Altmetric score

Total: 6 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
v. 2.27.0