Starches with Covalently-reactive Groups

Cationic Starches with Covalently-reactive Groups 

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Cationic Starches with Covalently-reactive Groups. 636... 

Dialdehyde starch,176-178 block reactive starch179 and cationic aldehyde starch180 181 comprise a special class of starches that can react with cellulose through the formation of covalent hemiacetal or acetal bonds. The zwitterion group is another functional group that has been utilized in conjunction with cationic and acetal groups. 

Procion dyes are chemically reactive dyes that have been formed by reaction of a dye with 2,4,6-trichlorotriazine or 2,4-dichlorotriazine [31]. Achloro group on the triazine ring of the dye is replaced by a polysaccharide hydroxyl group to form a stable, covalent linkage between the dye and the polysaccharide (reaction 7.17). Cibachron Blue, a monochlorotriazinyl dye, has been used to produce dyed complexes (reaction 7.18) with amylose, amylopectin, starch [32,33], cellulose [34], chitin [35], and dextran [32,36]. 

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