Process for preparing functional modified starch by utilizing quercus acutissima

Abstract

The invention discloses a method for preparing functional modified starch by utilizing quercus acutissima. The method comprises the following steps: firstly taking and soaking quercus acutissima kernels in water for several days; crushing, shelling and grinding into fine powder; then separating starch primary slurry from residues through a centrifugal sieve; removing sand, stones and other impurities in the slurry by using a sand remover; removing proteins, fine fibers and the like by using a cyclone; washing and drying to obtain quercus acutissima starch; taking the quercus acutissima starchas a raw material, firstly adding water for dissolution and heating to enable the quercus acutissima starch to be dissolved and expanded into a starch solution; then cooling, adding sodium dodecyl sulfate, and stirring and dissolving; then re-heating and adding a saccharifying enzyme, and stirring and dissolving; finally adding a diepoxypropyl succinate solution for sufficient reaction, filteringand drying to prepare the functional modified starch. The method disclosed by the invention is simple in preparation process and easy to operate.

Description

technical field [0001] The invention relates to a modified starch, in particular to a process for preparing functional modified starch by using Quercus japonica starch, which belongs to the field of starch processing. Background technique [0002] Modified starch is a kind of starch that has been modified. In the past ten years, the output of modified starch in the world has increased rapidly. At present, the annual output of modified starch in the world is close to more than 8 million tons, including more than 3 million tons in the United States and more than 2 million tons in Europe. , more than 600,000 tons in Japan, more than 500,000 tons in Thailand, and more than 1 million tons in my country. The application of modified starch in my country is still an emerging business, and there is a big difference with foreign countries in terms of the type, quality and application range of modified starch. If calculated based on the amount of modified starch currently required by v...

AI Technical Summary

Problems solved by technology

[0003] At present, there are mainly the following methods for preparing modified starch: one is physical method, such as ultrasonic irradiation or spraying process; the other is mechanical method, such as mechanical impact such as ball milling process; the third is biochemical method, such as alcohol denaturation or acid Hydrolysis, in the above several methods, the production cost of mechanical impact methods such as ultrasonic irradiation and ball milling process is high, and it is not easy to realize industrialization; while the spray method and alcohol denaturation form a solid endpolymer sphere, and the adsorption effect is only Occurs in the rough and uneven surface, the adsorption capacity is limited, and the application prospect is not optimistic

The reaction rate of the acid hydrolysis method is slow at the gelatinization temperature, the degradation is uneven, the randomness is strong, and it is not easy to form pores, which limits the application of the acid method