Preparation of oxidized starch by microwave-liquid phase method and study on its properties
Maize starches and hydrogen-peroxide were used as major raw materials to synthesize oxidized starch by microwave irradiation, and changes of the structure and properties of starches with different microwave treatment time were studied. Experimental results show that microwave accelerates oxidization reaction and its treatment time has a great influence on the structure of starches. With the increase of microwave treatment time, the carboxyl content of starches increase gradually, the viscosity of starch pasting liquid decrease remarkably, and starch pasting temperature at every level rise gradually, but its pasting temperature limits narrow down. In addition, oxidized starches with microwave treatment have high solubility and low swelling power properties.