Improved Accessibility and Reactivity of Dissolving Pulp for the Viscose Process: Pretreatment with Monocomponent Endoglucanase

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• 作者：Ann-Charlott Engströ ; m ; Monica Ek ; and Gunnar Henriksson
• 刊名：Biomacromolecules
• 出版年：2006
• 出版时间：June 2006
• 年：2006
• 卷：7
• 期：6
• 页码：2027 - 2031
• 全文大小：227K
• 年卷期：v.7,no.6(June 2006)
• ISSN：1526-4602

文摘

A high accessibility is an essential prerequisite for a homogeneous substitution of cellulose material. In thisstudy, chemical and enzymatic pretreatments to increase the accessibility of cellulose materials have beeninvestigated. Dissolving pulp has been treated with a monocomponent endoglucanase. Fock's method, a microscaleprocess similar to the viscose process, showed an increase in cellulose yield. Simultaneously, the viscosity decreased.To clarify whether the increase in reactivity was due solely to the decrease in the degree of polymerization, thedissolving pulp was also subjected to acid hydrolysis. At a given viscosity level, the enzymatic pretreated pulphad a higher reactivity than the pulp subjected to acid hydrolysis. To achieve 100% reactivity, according to Fock,the acid-treated pulp showed a lower molecular weight compared to the enzymatic-treated pulp. A monocomponentendoglucanase can thus be used to increase the reactivity and accessibility of dissolving pulp in the viscoseprocess.