A. W. T. King

Publications (3)0 Total impact

• Conference Proceeding: “Determination of the Molecular Weight Distribution of Intact Spruce Wood Acetylated in Ionic Liquid Media“

  A. W. T. King, P. Järvi, I. Kilpeläinen, D. S. Argyropoulos
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  ABSTRACT: Pulverized samples of Norway Spruce wood were dissolved in two different ionic lquids, 1,3 dimethylimidazolium dmiethylophosphate ([mmim]Me2PO4) and 1-allyl-3-methylimidazolium chloride ([amim]Cl) showing good solubilizing power. Furthermore, homogeneous solutions of acetylated and benzoylated wood samples were obtained using these ionic liquids. Size exclusion chromatography of the acetylated wood samples allowed us to vizualise the development of the molecular weight distributions of lignin in intact solubilized wood, with minimal degradation, as a function of degree of pulverization. The lack of chromophore in the carbohydatre part of wood (cellulose and hemicellulose), we omitted by employed acylation methodology in IL media, by functionalizing the wood hydroxyls (polysaccharides and lignin) as benzoyl ester. The same benzoylation methodology was also performed on enzymatic mild acidolysed lignin (EMAL) and holocellulose from the same wood source. This allowed for a comparison of the molecular weight distributions of EMAL, holocellulose, native lignin and wood polysaccharides from the same wood source.
  10th EWLP, Stockholm; 06/2008
• Conference Proceeding: “Study of Rheological Behaviour of Micro Crystalline Cellulose Dissolved in Two Different Ionic Liquids“

  P. Järvi, A. M. Olszewska, A. W. T. King, M. Granstrom, S. Hietala, I. Kilpeläinen, Dimitris S. Argyropoulos
  10th EWLP, Stockholm; 06/2008
• Conference Proceeding: “Analysis and discussion of lignocellulose dissolution and reactions in ionic liquids“

  A. W. T. King, P. Järvi, A. M. Olszewska, I. Kilpeläinen, D. S. Argyropoulos
  10th EWLP, Stockholm; 06/2008