Cationic polysaccharide derivatives have been generally used in paper, textile and cosmetic industries due to their reusability and biodegradability. Cationic dextrin was prepared by conventional and UHP-assisted etherification of dextrin using 2,3-epoxypropyltrimethylammonium chloride (ETMAC) under alkaline condition. The molar ratios of AGU/ETMAC were 1:1.5, 1:1.77, the amount of NaOH were 1.5g, 0.53g and reaction temperature was 25�C. UHP-assisted cationization was carried out at 100, 300, 500MPa for 30minutes. Nitrogen contents of cationic dextrin were evaluated by Kjeldahl method and degree of substitution (DS) was calculated. Their DS were ranged from 0.58 to 1.56. The FT-IR and NMR spectrum indicated the presence of C�N bond, which is not present in native dextrin. This is a clear proof of incorporation of cationic moieties onto the backbone of the dextrin. This result shows that UHP-assisted cationization can be an effective method and provides basic information on physicochemical properties of UHP-assisted cationic dextrin.

Conventional and ultra high pressure (UHP) assisted cationization of dextrin

244th National Meeting (2012)

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