The development of starch derivatives has been expected and been considered that mix-modified starch is the development trends of the starch chemicals.

Several starch derivatives was prepared as surface sizing agent,and then compared two indicators including ring crush strength and folding endurance.

The methods of application of starch derivants (oxided starch,cross linkage starch,porous starch etc.

The current situation and development trend of domestic and foreign production of starch derivatives are analyzed and explained, and aiming at existing problems, some beneficial suggestions in such respects as science and technology input, product development, personnel training, technology and enterprise fostering, application research and cooperation between home and abroad, etc.

New starch derivative was tested in membrane property,the optimum degree of substitute is suggested concerning the kind of modified starch for good membrane.

The cationic starch derivative HY-6 is a commercial product prepared by graft-copolymerization of acrylamide (AM) onto starch, reaction of the graft-copolymer with formaldehyde and dimethylamine and quarternary salt formation.