論文

2018年8月15日

Starch carboxymethylation by reactive extrusion: Reaction kinetics and structure analysis

Carbohydrate Polymers
  • Romain Milotskyi
  • ,
  • Christophe Bliard
  • ,
  • Dominique Tusseau
  • ,
  • Claude Benoit

194
開始ページ
193
終了ページ
199
DOI
10.1016/j.carbpol.2018.04.040

© 2018 Elsevier Ltd An efficient reaction of carboxymethylation using reactive extrusion (REX) on plasticized starch was studied. The reaction products were characterized by Nuclear Magnetic Resonance (NMR) spectroscopy and high-performance liquid chromatography (HPLC). Several parameters affecting the reaction were investigated including the amount of plasticizer, reagent stoichiometry and reaction time. Reaction efficiency (RE) up to 65% was achieved in one step after 5 min of reaction, showing that the reaction kinetics is hundred times faster than the same reaction described in solution. The degree of substitution (DS) of 2.1 was obtained in 3 steps. The regioselectivity of the reaction on the anhydroglucose monomers units (AGU) was respectively C-2 > C-6 > C-3. A significant deviation from the Spurlin statistical model was observed. Multisubstituted AGU were analyzed by chromatography. Different multi-substitution patterns were obtained by using different starch sources. Tetra-carboxymethyl glucose corresponding to the complete modification of the terminal non-reducing glucoses from branched amylopectin chains was analysed.

リンク情報
DOI
https://doi.org/10.1016/j.carbpol.2018.04.040
URL
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85045580405&origin=inward
ID情報
  • DOI : 10.1016/j.carbpol.2018.04.040
  • ISSN : 0144-8617
  • SCOPUS ID : 85045580405

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