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Fractionation and characterization of completely dissolved ball milled hardwood
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology. KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center.
University of Maine, USA.
2011 (English)In: Journal of wood chemistry and technology, ISSN 0277-3813, E-ISSN 1532-2319, Vol. 31, no 3, 183-203 p.Article in journal (Refereed) Published
Abstract [en]

A simplified method for sequentially dissolving and fractionating ball milled hard wood polymers in high yield is presented. The complete dissolution of the whole ball milled wood, and the fractions recovered from it by applying the sequential fractionation, was accomplished in lithium chloride/ dimethylacetamide solvent system enabling size exclusion chromatography studies. The chromatography applied a four detector system; an Ultraviolet-Visible spectroscopy-, Intrinsic Viscosity-Differential Pressure-, Right Angle Laser Light Scattering- and Refractive Index detectors, a combination hereby proposed to enable interpretation of the complex elution profiles with emphasis on chemical interactions. Indirect evidence of the presence of lignin carbohydrate complexes in hardwoods is provided. It is also proposed that cellulose is severely degraded from a degree of polymerization of 10,000 in wood, down to a value of approximately 400 by either the applied ball milling condition or in subsequent solubilization steps.

Place, publisher, year, edition, pages
2011. Vol. 31, no 3, 183-203 p.
Keyword [en]
Lignin Carbohydrate Complexes (LCC), Size Exclusion Chromatography (SEC), Vibratory ball milling, Ball-milled, Chemical interactions, Complete dissolution, Degree of polymerization, Detector systems, Dimethylacetamide, Elution profiles, High yield, Lignin-carbohydrate complex, Lithium chloride, Milling conditions, Right-angle laser light scatterings, Sequential fractionation, Simplified method, Solvent system, Wood polymers, Carbohydrates, Chlorine compounds, Complexation, Dissolution, Gel permeation chromatography, Hardwoods, Light scattering, Lignin, Lithium, Milling (machining), Milling machines, Polymers, Refractive index, Size exclusion chromatography, Spheres, Ultraviolet lasers, Ultraviolet spectroscopy, Ultraviolet visible spectroscopy, Ball milling, Chromatography, Dissolving, Fractionation, Grinding, Optical Scattering, Refractivity, Solvents
National Category
Natural Sciences Chemical Sciences
URN: urn:nbn:se:kth:diva-72190DOI: 10.1080/02773813.2010.515048ISI: 000299614000001ScopusID: 2-s2.0-79958812472OAI: diva2:487311
QC 20120219Available from: 2012-01-31 Created: 2012-01-31 Last updated: 2012-04-02Bibliographically approved

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