Improved Reactivity and Derivatization of Cellulose after Pre-Hydrolysis with Commercial Enzymes

    Research output: Contribution to journalArticleResearchpeer-review

    Abstract

    Reactivity is an important parameter when considering the chemical modification or dissolution of cellulose. Different pretreatment methods affect cellulose reactivity by decreasing its degree of polymerization (DP) and crystallinity. In this study, the molar mass of cellulose was decreased via enzymatic pretreatment. Three commercial endoglucanase-rich products were tested. The target was to reduce the viscosity of the pulp to below 200 mL/g and, thus, increase the reactivity of the cellulose. For comparison, cellulose was also pretreated with ozone, and the effects of each pretreatment method on crystallinity and monosaccharide composition of the resulting pulps were investigated. Both enzymatically treated and ozone-treated pulps were esterified using homogeneous and heterogeneous methods, and the degrees of substitution for these treated pulps were much higher than the esters when the untreated pulp was used. Cellulose esters from the pretreated pulps formed films with good mechanical properties by solvent casting.
    LanguageEnglish
    Pages561-574
    JournalBioResources
    Volume14
    Issue number1
    Publication statusPublished - 2019
    MoE publication typeNot Eligible

    Fingerprint

    Cellulose
    Pulp
    cellulose
    hydrolysis
    Hydrolysis
    Enzymes
    enzyme
    Ozone
    crystallinity
    ester
    Esters
    ozone
    monosaccharide
    Cellulase
    Monosaccharides
    Molar mass
    Chemical modification
    polymerization
    pulp
    mechanical property

    Keywords

    • Cellulose
    • Enzymatic treatment
    • Ozone treatment
    • Cellulose esters

    OKM Publication Types

    • A1 Refereed journal article

    OKM Open Access Status

    • 1 Open Access

    Cite this

    @article{134c37518270421fb4ba42cf196611c9,
    title = "Improved Reactivity and Derivatization of Cellulose after Pre-Hydrolysis with Commercial Enzymes",
    abstract = "Reactivity is an important parameter when considering the chemical modification or dissolution of cellulose. Different pretreatment methods affect cellulose reactivity by decreasing its degree of polymerization (DP) and crystallinity. In this study, the molar mass of cellulose was decreased via enzymatic pretreatment. Three commercial endoglucanase-rich products were tested. The target was to reduce the viscosity of the pulp to below 200 mL/g and, thus, increase the reactivity of the cellulose. For comparison, cellulose was also pretreated with ozone, and the effects of each pretreatment method on crystallinity and monosaccharide composition of the resulting pulps were investigated. Both enzymatically treated and ozone-treated pulps were esterified using homogeneous and heterogeneous methods, and the degrees of substitution for these treated pulps were much higher than the esters when the untreated pulp was used. Cellulose esters from the pretreated pulps formed films with good mechanical properties by solvent casting.",
    keywords = "Cellulose, Enzymatic treatment, Ozone treatment, Cellulose esters",
    author = "Pia Willberg-Keyril{\"a}inen and Jarmo Ropponen and Manu Lahtinen and Jaakko Pere",
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    language = "English",
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    }

    Improved Reactivity and Derivatization of Cellulose after Pre-Hydrolysis with Commercial Enzymes. / Willberg-Keyriläinen, Pia; Ropponen, Jarmo; Lahtinen, Manu; Pere, Jaakko.

    In: BioResources, Vol. 14, No. 1, 2019, p. 561-574.

    Research output: Contribution to journalArticleResearchpeer-review

    TY - JOUR

    T1 - Improved Reactivity and Derivatization of Cellulose after Pre-Hydrolysis with Commercial Enzymes

    AU - Willberg-Keyriläinen, Pia

    AU - Ropponen, Jarmo

    AU - Lahtinen, Manu

    AU - Pere, Jaakko

    PY - 2019

    Y1 - 2019

    N2 - Reactivity is an important parameter when considering the chemical modification or dissolution of cellulose. Different pretreatment methods affect cellulose reactivity by decreasing its degree of polymerization (DP) and crystallinity. In this study, the molar mass of cellulose was decreased via enzymatic pretreatment. Three commercial endoglucanase-rich products were tested. The target was to reduce the viscosity of the pulp to below 200 mL/g and, thus, increase the reactivity of the cellulose. For comparison, cellulose was also pretreated with ozone, and the effects of each pretreatment method on crystallinity and monosaccharide composition of the resulting pulps were investigated. Both enzymatically treated and ozone-treated pulps were esterified using homogeneous and heterogeneous methods, and the degrees of substitution for these treated pulps were much higher than the esters when the untreated pulp was used. Cellulose esters from the pretreated pulps formed films with good mechanical properties by solvent casting.

    AB - Reactivity is an important parameter when considering the chemical modification or dissolution of cellulose. Different pretreatment methods affect cellulose reactivity by decreasing its degree of polymerization (DP) and crystallinity. In this study, the molar mass of cellulose was decreased via enzymatic pretreatment. Three commercial endoglucanase-rich products were tested. The target was to reduce the viscosity of the pulp to below 200 mL/g and, thus, increase the reactivity of the cellulose. For comparison, cellulose was also pretreated with ozone, and the effects of each pretreatment method on crystallinity and monosaccharide composition of the resulting pulps were investigated. Both enzymatically treated and ozone-treated pulps were esterified using homogeneous and heterogeneous methods, and the degrees of substitution for these treated pulps were much higher than the esters when the untreated pulp was used. Cellulose esters from the pretreated pulps formed films with good mechanical properties by solvent casting.

    KW - Cellulose

    KW - Enzymatic treatment

    KW - Ozone treatment

    KW - Cellulose esters

    M3 - Article

    VL - 14

    SP - 561

    EP - 574

    JO - BioResources

    T2 - BioResources

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    SN - 1930-2126

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    ER -