Method for gelatinizing sweet potato flour by using low-temperature alkali solution

Abstract

The invention discloses a sweet potato flour gelatinizing method, and particularly relates to a method for gelatinizing sweet potato flour by using a low-temperature alkali solution as a solvent. The method comprises the following steps: with sodium hydroxide / urea / thiourea as a solvent system, firstly precooling 6-10% sodium hydroxide solution to -4 to 0 DEG C, adding the sweet potato flour, mixing so as to generate alkaline sweet potato flour; or mixing the sweet potato flour and the 6-10% sodium hydroxide solution, then cooling to -4 to 0 DEG C; and adding 3-12% urea / thiourea aqueous solution precooled to -4 to 0 DEG C, stirring and mixing so as to obtain the transparent sweet potato flour gelatinized by using the low-temperature alkali solution. The method has the advantages that the sweet potato flour comprising sweet potato starch and sweet potato celluloses can be rapidly and effectively dissolved, the sweet potato flour low-temperature alkali solution with high solubility can be obtained, and sweet potato resources are effectively utilized. The raw materials used in the method are simple; the preparation technology is simple; the solvent is easy to recycle; and no environmental pollution is generated in a dissolving process.

Description

technical field [0001] The invention relates to a method for gelatinizing sweet potato powder with a low-temperature alkaline solution, which belongs to the field of biological resources. The invention is a novel green and environment-friendly gelatinization technology for sweet potato powder. Background technique [0002] Sweet potato, also known as sweet potato, sweet potato, sweet potato, sweet potato, sweet potato, sweet potato, sweet potato, sweet potato, etc., belongs to Convolvulaceae, an annual plant. Its main production area is south of 40° north latitude, and 90% of the sweet potato production is in Asia. my country is the country with the largest sweet potato cultivation area, accounting for more than half of the world's total sweet potato cultivation area, and its output ranks first in the world. Sweet potato is a starch-rich plant with a starch content of about 30%. It is an industrial raw material for the production of vermicelli, modified starch, starch sugar,...

AI Technical Summary

Problems solved by technology

The biggest disadvantage of using this traditional starch gelatinization method is that it needs to be heated, which consumes a lot of energy and greatly increases the cost of sweet potato flour gelatinization