Etherification of Wood-Based Hemicelluloses for Interfacial Activity

Tiina Nypelö, Christiane Laine, Masaaki Aoki, Tekla Tammelin, Ute Henniges

    Research output: Contribution to journalArticleScientificpeer-review

    10 Citations (Scopus)

    Abstract

    We present wetting, hygroscopicity, and interfacial activity of hemicellulose with respect to etherification and contrast it to their potential as interfacial modifiers, which is demonstrated by oil-in-water emulsification containing up to 60 vol% of the oil phase. Tunable amphiphilicity of hardwood and softwood hemicelluloses, xylans, and galactoglucomannans, respectively, was accomplished via controlled etherification. A series of degree of substitution (DS) of hydroxypropylated and 3-butoxy-2-hydroxypropylated ("butylated") grades was synthesized. The hemicellulose ethers were characterized by gel permeation chromatography, spectroscopic techniques, such as NMR, and contact angle measurements. An attenuated total reflectance infrared method was developed for fast identification of the DS. Near infrared analysis was utilized to explore the hygroscopicity of the material and to perform principle component analysis. The modification to butylated grades decreased the hygroscopicity, whereas the hydroxypropylated grades bound moisture. All of the hemicellulose ethers were water-soluble. The interfacial tension of the aqueous hemicellulose solutions was determined by pendant-drop tensiometer, and it was demonstrated to be dependent on the degree of modification.
    Original languageEnglish
    Pages (from-to)1894-1901
    JournalBiomacromolecules
    Volume17
    Issue number5
    DOIs
    Publication statusPublished - 2016
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Ethers
    Wood
    Substitution reactions
    Infrared radiation
    Emulsification
    Softwoods
    Hardwoods
    Gel permeation chromatography
    Angle measurement
    Contact angle
    Surface tension
    Wetting
    Water
    Moisture
    Nuclear magnetic resonance
    Oils
    Xylans
    hemicellulose

    Keywords

    • hemicellulose ethers
    • xylan
    • galactoglucomannan
    • interfacial properties

    Cite this

    Nypelö, Tiina ; Laine, Christiane ; Aoki, Masaaki ; Tammelin, Tekla ; Henniges, Ute. / Etherification of Wood-Based Hemicelluloses for Interfacial Activity. In: Biomacromolecules. 2016 ; Vol. 17, No. 5. pp. 1894-1901.
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    abstract = "We present wetting, hygroscopicity, and interfacial activity of hemicellulose with respect to etherification and contrast it to their potential as interfacial modifiers, which is demonstrated by oil-in-water emulsification containing up to 60 vol{\%} of the oil phase. Tunable amphiphilicity of hardwood and softwood hemicelluloses, xylans, and galactoglucomannans, respectively, was accomplished via controlled etherification. A series of degree of substitution (DS) of hydroxypropylated and 3-butoxy-2-hydroxypropylated ({"}butylated{"}) grades was synthesized. The hemicellulose ethers were characterized by gel permeation chromatography, spectroscopic techniques, such as NMR, and contact angle measurements. An attenuated total reflectance infrared method was developed for fast identification of the DS. Near infrared analysis was utilized to explore the hygroscopicity of the material and to perform principle component analysis. The modification to butylated grades decreased the hygroscopicity, whereas the hydroxypropylated grades bound moisture. All of the hemicellulose ethers were water-soluble. The interfacial tension of the aqueous hemicellulose solutions was determined by pendant-drop tensiometer, and it was demonstrated to be dependent on the degree of modification.",
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    author = "Tiina Nypel{\"o} and Christiane Laine and Masaaki Aoki and Tekla Tammelin and Ute Henniges",
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    Etherification of Wood-Based Hemicelluloses for Interfacial Activity. / Nypelö, Tiina; Laine, Christiane; Aoki, Masaaki; Tammelin, Tekla; Henniges, Ute.

    In: Biomacromolecules, Vol. 17, No. 5, 2016, p. 1894-1901.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Etherification of Wood-Based Hemicelluloses for Interfacial Activity

    AU - Nypelö, Tiina

    AU - Laine, Christiane

    AU - Aoki, Masaaki

    AU - Tammelin, Tekla

    AU - Henniges, Ute

    N1 - Project code: 86663

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    N2 - We present wetting, hygroscopicity, and interfacial activity of hemicellulose with respect to etherification and contrast it to their potential as interfacial modifiers, which is demonstrated by oil-in-water emulsification containing up to 60 vol% of the oil phase. Tunable amphiphilicity of hardwood and softwood hemicelluloses, xylans, and galactoglucomannans, respectively, was accomplished via controlled etherification. A series of degree of substitution (DS) of hydroxypropylated and 3-butoxy-2-hydroxypropylated ("butylated") grades was synthesized. The hemicellulose ethers were characterized by gel permeation chromatography, spectroscopic techniques, such as NMR, and contact angle measurements. An attenuated total reflectance infrared method was developed for fast identification of the DS. Near infrared analysis was utilized to explore the hygroscopicity of the material and to perform principle component analysis. The modification to butylated grades decreased the hygroscopicity, whereas the hydroxypropylated grades bound moisture. All of the hemicellulose ethers were water-soluble. The interfacial tension of the aqueous hemicellulose solutions was determined by pendant-drop tensiometer, and it was demonstrated to be dependent on the degree of modification.

    AB - We present wetting, hygroscopicity, and interfacial activity of hemicellulose with respect to etherification and contrast it to their potential as interfacial modifiers, which is demonstrated by oil-in-water emulsification containing up to 60 vol% of the oil phase. Tunable amphiphilicity of hardwood and softwood hemicelluloses, xylans, and galactoglucomannans, respectively, was accomplished via controlled etherification. A series of degree of substitution (DS) of hydroxypropylated and 3-butoxy-2-hydroxypropylated ("butylated") grades was synthesized. The hemicellulose ethers were characterized by gel permeation chromatography, spectroscopic techniques, such as NMR, and contact angle measurements. An attenuated total reflectance infrared method was developed for fast identification of the DS. Near infrared analysis was utilized to explore the hygroscopicity of the material and to perform principle component analysis. The modification to butylated grades decreased the hygroscopicity, whereas the hydroxypropylated grades bound moisture. All of the hemicellulose ethers were water-soluble. The interfacial tension of the aqueous hemicellulose solutions was determined by pendant-drop tensiometer, and it was demonstrated to be dependent on the degree of modification.

    KW - hemicellulose ethers

    KW - xylan

    KW - galactoglucomannan

    KW - interfacial properties

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    DO - 10.1021/acs.biomac.6b00355

    M3 - Article

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    SP - 1894

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