We are professional in using different functionalities of modified starch to solve the problems and to create values. Starch is easy to be destroyed under high temperature, strong acid and high shear stress and the freeze-thaw cycles also accelerate the destruction of starch.
Our products improve the disadvantages of starch and provide more varieties in application.
Dissolving starch in water and heating until it reached gelatinization temperature. Then dry it to become a physical modified starch. This kind of starch will swell easily in cold water and raise the viscosity of the solution.
To produce non-ionic type etherized modified starch, etherification of starch with Propylene oxide(C3H6O) in alkalic environment (NaOH) is needed. Etherized modified starch will substitute the ether bond and thus raise the stability of the starch. The hydrophilic characteristic of hydroxypropyl can lower the strength of hydrogen bonds inside the starch granules. This will help to reach a status which is gelatinization, transparency, flowability, a lot more easier for swelling, less deposit and higher stability.
To prepare esterified starch, adding Acetic anhydride or VAM to starch under alkalic environment (NaOH, Na2CO3 )is needed. Esterified starch has relatively higher stability for acid, alkali and heat which would be more difficult for molecules to form ester bonds. The features of esterification are easier gelatinization, transparency, flowability and less deposit.
Starch added into POCL3 or STMP under alkalic environment (NaOH) can produce crosslinked tapioca starch which is able to stop ester bond from forming and decelerate granule swelling.
Esterification of starch with –OH and –COOH of octenyl succinic anhydride yield Starch Sodium Octenyl Succinate, which will let the molecular strands of starch have both hydroxypropyl and lipophilicity. It is often added for producing emulsification and microencapsulation.
To product oxidized starch, oxidization of NaOCl allows structures of starch to become twisted chains and result in its difficulties to form ester bond. Oxidized starch is able to form thin film for its low viscosity and gel formation.