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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    author = "Kontturi, {Katri S.} and Susanna Holappa and Eero Kontturi and Leena-Sisko Johansson and Sari Hyv{\"a}rinen and Soili Peltonen and Janne Laine",
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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

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    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

    AU - Laine, Janne

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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.

    KW - hydrophobized cationic starch

    KW - model surfaces

    KW - film deposition

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