Production of Modified Starch Using System Hydrogen Peroxide-Thiourea Dioxide

Resumo

A new method for producing oxidized starches using hydrogen peroxide and thiourea dioxide is proposed. It is shown that this method makes it possible to broadly control the number of functional groups arising in modified starch as well as the viscosity of the paste made from modified starch. This is achieved by changing the molar ratio of thiourea dioxide and hydrogen peroxide. The oxidative modification of starch is carried out under mild conditions and proceeds at high speed.