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Improved accessibility and reactivity of dissolving pulp for the viscose process: Pretreatment with monocomponent endoglucanase
KTH, Skolan för kemivetenskap (CHE), Fiber- och polymerteknik, Träkemi och massateknologi.
KTH, Skolan för kemivetenskap (CHE), Fiber- och polymerteknik, Träkemi och massateknologi.
2006 (engelsk)Inngår i: Biomacromolecules, ISSN 1525-7797, E-ISSN 1526-4602, Vol. 7, nr 6, s. 2027-2031Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

A high accessibility is an essential prerequisite for a homogeneous substitution of cellulose material. In this study, chemical and enzymatic pretreatments to increase the accessibility of cellulose materials have been investigated. Dissolving pulp has been treated with a monocomponent endoglucanase. Fock's method, a microscale process 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, the dissolving pulp was also subjected to acid hydrolysis. At a given viscosity level, the enzymatic pretreated pulp had 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 monocomponent endoglucanase can thus be used to increase the reactivity and accessibility of dissolving pulp in the viscose process.

sted, utgiver, år, opplag, sider
2006. Vol. 7, nr 6, s. 2027-2031
Emneord [en]
cellulases, cellulose, c-13-cp/mas-nmr-spectra
Identifikatorer
URN: urn:nbn:se:kth:diva-15737DOI: 10.1021/bm0509725ISI: 000238180600046Scopus ID: 2-s2.0-33745586068OAI: oai:DiVA.org:kth-15737DiVA, id: diva2:333779
Merknad
QC 20100525Tilgjengelig fra: 2010-08-05 Laget: 2010-08-05 Sist oppdatert: 2017-12-12bibliografisk kontrollert

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