Studies on Inclusion in Intra- and Inter-chain of Polysaccharide Molecules (I)

Inter-chain Inclusion of l-Menthol

Abstract

It was found that l-menthol was firmly included in polysaccharide materials such as starch granules and cellulose powder. The inclusion occured when the dried polysaccharides were contacted with menthol molecules in the presence of methanol. The maximum amount of menthol included by the polysaccharides used came to about 5, 0 mg/g complex. The inclusion of menthol was inhibited by the moisture both in polysaccharide and methanol. The included menthol could be most efficiently extracted with methanol among several organic solvents. The inclusion complexes were very stable against dry beatings (e. g., at 140°C under reduced pressure), but the included menthol was gradually losed from the complex on standing in damp atmosphere.