Glucan fibre

摘要

Method for preparing a branched glucan having a chain comprising a plurality of glucose units linked by alpha 1,4-glycoside bonds and a plurality of side-groups linked to said chain via another type of glycoside bonding, which side-groups comprise one or more glucose units, the method comprising contacting a glucose source with a polysaccharide—which polysaccharide is a glucan comprising a plurality of glucose units linked by alpha 1,4-glycoside bonds and is essentially linear or branched to a lesser extent than the branched glucan that is to be prepared—in the presence of an acid catalyst under polycondensation conditions, thereby forming the branched glucan.

主权项

1. Method for preparing a branched glucan having a chain comprising a plurality of glucose units linked by alpha 1,4-glycoside bonds and a plurality of side-groups linked to said chain via another type of glycoside bonding, which side-groups comprise one or more glucose units, the method comprising
providing a melt comprising a glucose source selected from the group consisting of glucose, maltose and polydextrose with a polysaccharide
wherein said polysaccharide
is a glucan comprising a plurality of glucose units linked by alpha 1,4-glycoside bonds, which glucan is essentially linear or branched to a lesser extent than the branched glucan that is to be prepared,has a number average degree of polymerisation of at least 10, andhas been gelatinized prior to providing the melt,wherein the weight to weight ratio of the total of said glucose source to said polysaccharide in the melt being in the range of 30:70 to 99:1, and contacting said glucose source and said polysaccharide in the melt in the presence of an acid catalyst under polycondensation conditions, thereby forming the branched glucan.