Modification of Natural Corn Starch Using Different Methods

Natural starch is one of the most abundant biopolymer can be found easily and extracted from many agricultural sources like corn, potato and rice. Natural starch can be used in various industries due to the low cost, biodegradability, to be green chemical, high efficiency in processes and renewability attributes. Food, cosmetics, pharmaceutical and paper industries are some of the areas which starch is being used. Besides these positive features, native starch has some limitations during process like low solubility in cold water, high viscosity, low gelatalization temperature, high tendency to retrogradation. To eliminate these disadvantages, modification is the best solution. Natural starch is being modified since many years with physical, chemical, enzymatic and genetic methods. In starch mills, in order to produce modified starches called cationic, many chemical reagents and high amount energy are being consumed. The aim of this study is, applying to corn starch environmental friendly pre-modification methods like ultrasonic(US) and microwave(MW) assisted modifications. Various conditions (different sequence of methods (US-MW, MW-US), treatment time and power) were applied, changes on granules morfology were characterized with SEM and FTIR analyses. It was aimed to reduce the energy consumption, long process time and amount of chemical reagents used in starch factories during the modification, and also extra analyses(XRD, viscosity, swelling power, brightness and solubility) will be carried out.

Keywords: starch, modification, physical, ultrasonic, microwave

Natural starch is one of the most abundant biopolymer can be found easily and extracted from many agricultural sources like corn, potato and rice. Natural starch can be used in various industries due to the low cost, biodegradability, to be green chemical, high efficiency in processes and renewability attributes. Food, cosmetics, pharmaceutical and paper industries are some of the areas which starch is being used. Besides these positive features, native starch has some limitations during process like low solubility in cold water, high viscosity, low gelatalization temperature, high tendency to retrogradation. To eliminate these disadvantages, modification is the best solution. Natural starch is being modified since many years with physical, chemical, enzymatic and genetic methods. In starch mills, in order to produce modified starches called cationic, many chemical reagents and high amount energy are being consumed. The aim of this study is, applying to corn starch environmental friendly pre-modification methods like ultrasonic(US) and microwave(MW) assisted modifications. Various conditions (different sequence of methods (US-MW, MW-US), treatment time and power) were applied, changes on granules morfology were characterized with SEM and FTIR analyses. It was aimed to reduce the energy consumption, long process time and amount of chemical reagents used in starch factories during the modification, and also extra analyses(XRD, viscosity, swelling power, brightness and solubility) will be carried out.

Anahtar Kelimeler: starch, modification, physical, ultrasonic, microwave

Yılmaz, A., Tuğrul, N. (2020). Modification of Natural Corn Starch Using Different Methods. Journal of Current Research on Engineering, Science and Technology, 6 (1), 37-44.