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Cationic starch is a starch with a tertiary amino group or quaternary ammonium group introduced into the starch macromolecule to give the starch cationic properties.

 

Definition

The introduction of tertiary amino group or quaternary ammonium group into the starch macromolecule gives the starch cationic properties.

 

 

The positive charge of cationic starch allows it to bind to negatively charged substrates and to attract and retain other negatively charged additives to the substrate. Cotton fiber in the process, and metal machine parts friction, often with a negative charge, for hydrophobic synthetic fibers is more serious, if the positively charged cationic starch sizing, not only will have a good adhesion, but also has the effect of eliminating static electricity.

 

Cationic starch for warp sizing has been used in foreign countries. For example, cationic composite modified starch, that is, in the cationic modification before the first starch cleavage and depolymerization, in order to obtain low viscosity starch, and then cationic denaturation. There are also amphoteric starch derivatives, that is, the use of cationic and anionic two kinds of denaturing agents on the starch for double treatment and get. The products contain both cationic and anionic groups.

 

There are two main types of cationic starch: one is starch tertiary amino alkyl ether; the other is quaternary ammonium starch ether.

 

 

Starch reacts with amine compounds to form ether derivatives containing amino group and ammonium group with positive charge on nitrogen atom, which is called cationic starch. Because of its affinity for anionic substances, cationic starch is widely used in paper, textile, oil field, adhesives, mining and cosmetics.

 

 

 

 

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