Rapid Measurement Method for Molecular Weight Distribution of Cellulose using Tetrabutylammonium Acetate/Dimethylsulfoxide（TBAA/DMSO）Mixed Solvent

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<p>A rapid size exclusion chromatography（SEC）analysis system for cellulose was successfully developed using a mixed solvent of tetrabutylammonium acetate（TBAA）/dimethylsulfoxide（DMSO）. The cellulose sample was dissolved within 30 minutes without pretreatment, the molecular weight distribution measurement was completed in 30 minutes, and the average molecular weight was calculated based on pullulan standards. In the high‒purity cellulose samples, a high linear correlation was found between the common logarithm of the weight average molecular weight（Mw）and the viscosity average molecular weight（Mv）. In pulp and commercial cellulose powder, peaks or shoulders derived from hemicellulose appeared in the low molecular weight region and the polydispersity increased. Even when hemicellulose was contained, almost the same correlation was observed between Mw and Mv as the high‒purity cellulose samples, and the approximate degree of viscosity polymerization could be estimated. The method developed in this study can be a powerful method for measuring the degree of polymerization, which can replace the viscosity method that requires complicated operations.</p>

Journal

  • JAPAN TAPPI JOURNAL

    JAPAN TAPPI JOURNAL 74 (10), 1027-1034, 2020

    JAPAN TECHNICAL ASSOCIATION OF THE PULP AND PAPER INDUSTRY

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