Arrangements of cationic starch of varying hydrophobicity on hydrophilic and hydrophobic surfaces

Katri S. Kontturi (Corresponding Author), Susanna Holappa, Eero Kontturi, Leena-Sisko Johansson, Sari Hyvärinen, Soili Peltonen, Janne Laine

Research output: Contribution to journalArticleScientificpeer-review

8 Citations (Scopus)

Abstract

Arrangements of cationic starches hydrophobized by acetylation (CS-acet) deposited from aqueous electrolyte solutions onto hydrophilized and hydrophobized silica surfaces were investigated by atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), and contact angle measurements. The influence of electrolyte composition, acetylation degree of cationic starch (DSACET), and deposition method was examined. On a hydrophobic substrate, CS-acet formed an open film with structure strongly dependent on DSACET and electrolyte composition of the solution. On a hydrophilic substrate, acetylation increased the hydrophobicity of the film when the starch was deposited by adsorbing. When deposition was made by spin coating, i.e., the CS-acet was forced onto the substrate, the hydrophobic tuning by acetylation was lost. The films deposited by spin coating were thicker and considerably rougher than those deposited by adsorbing.

Original languageEnglish
Pages (from-to)21 - 29
Number of pages9
JournalJournal of Colloid and Interface Science
Volume336
Issue number1
DOIs
Publication statusPublished - 2009
MoE publication typeA1 Journal article-refereed

Fingerprint

Acetylation
Hydrophobicity
Starch
Electrolytes
Spin coating
Substrates
Angle measurement
Chemical analysis
Silicon Dioxide
Contact angle
Atomic force microscopy
X ray photoelectron spectroscopy
Tuning
Silica

Keywords

  • hydrophobized cationic starch
  • model surfaces
  • film deposition

Cite this

Kontturi, Katri S. ; Holappa, Susanna ; Kontturi, Eero ; Johansson, Leena-Sisko ; Hyvärinen, Sari ; Peltonen, Soili ; Laine, Janne. / Arrangements of cationic starch of varying hydrophobicity on hydrophilic and hydrophobic surfaces. In: Journal of Colloid and Interface Science. 2009 ; Vol. 336, No. 1. pp. 21 - 29.
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abstract = "Arrangements of cationic starches hydrophobized by acetylation (CS-acet) deposited from aqueous electrolyte solutions onto hydrophilized and hydrophobized silica surfaces were investigated by atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), and contact angle measurements. The influence of electrolyte composition, acetylation degree of cationic starch (DSACET), and deposition method was examined. On a hydrophobic substrate, CS-acet formed an open film with structure strongly dependent on DSACET and electrolyte composition of the solution. On a hydrophilic substrate, acetylation increased the hydrophobicity of the film when the starch was deposited by adsorbing. When deposition was made by spin coating, i.e., the CS-acet was forced onto the substrate, the hydrophobic tuning by acetylation was lost. The films deposited by spin coating were thicker and considerably rougher than those deposited by adsorbing.",
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Arrangements of cationic starch of varying hydrophobicity on hydrophilic and hydrophobic surfaces. / Kontturi, Katri S. (Corresponding Author); Holappa, Susanna; Kontturi, Eero; Johansson, Leena-Sisko; Hyvärinen, Sari; Peltonen, Soili; Laine, Janne.

In: Journal of Colloid and Interface Science, Vol. 336, No. 1, 2009, p. 21 - 29.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Arrangements of cationic starch of varying hydrophobicity on hydrophilic and hydrophobic surfaces

AU - Kontturi, Katri S.

AU - Holappa, Susanna

AU - Kontturi, Eero

AU - Johansson, Leena-Sisko

AU - Hyvärinen, Sari

AU - Peltonen, Soili

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AB - Arrangements of cationic starches hydrophobized by acetylation (CS-acet) deposited from aqueous electrolyte solutions onto hydrophilized and hydrophobized silica surfaces were investigated by atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), and contact angle measurements. The influence of electrolyte composition, acetylation degree of cationic starch (DSACET), and deposition method was examined. On a hydrophobic substrate, CS-acet formed an open film with structure strongly dependent on DSACET and electrolyte composition of the solution. On a hydrophilic substrate, acetylation increased the hydrophobicity of the film when the starch was deposited by adsorbing. When deposition was made by spin coating, i.e., the CS-acet was forced onto the substrate, the hydrophobic tuning by acetylation was lost. The films deposited by spin coating were thicker and considerably rougher than those deposited by adsorbing.

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KW - model surfaces

KW - film deposition

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