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Synthesis of Cyanoethyl Inulin, Aminopropyl Inulin and Carboxyethyl Inulin
Author(s) -
Verraest Dorine L.,
da Silva Lara P.,
Peters Joop A.,
van Bekkum Herman
Publication year - 1996
Publication title -
starch ‐ stärke
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.62
H-Index - 82
eISSN - 1521-379X
pISSN - 0038-9056
DOI - 10.1002/star.19960480509
Subject(s) - chemistry , inulin , acrylonitrile , sodium borohydride , nitrile , hydrolysis , sodium hydroxide , hydrogen peroxide , nuclear chemistry , sodium , aqueous solution , sodium carbonate , organic chemistry , polymer chemistry , catalysis , food science , copolymer , polymer
Inulin was cyanoethylated by reaction with acrylonitrile in the presence of aqueous sodium hydroxide. Products with a degree of substution (ds) from 0.2 to 1.6 were prepared. The materials were analyzed using NMR spectroscopy and GPC analysis. The nitrile groups of cyanoethyl inulin were converted into amino groups by reduction with sodium borohydride in the presence of a transition metal chloride (CoCl 2 .6H 2 O). Furthermore, the nitrile groups were hydrolyzed towards carboxylates using hydrogen peroxide in alkaline medium. The polycarboxylate obtained by this means was shown to possess good calcium carbonate crystallization inhibition properties.