Preparation method of rice starch nano-sized crystals
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A technology of rice starch and nanocrystals, which is applied in the field of preparation of rice starch nanocrystals, can solve the problems of high processing cost, long processing time, narrow application range, etc., achieve low cost, reduce processing cost, solubility and enzymolysis Good results
Inactive Publication Date: 2016-07-06
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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Problems solved by technology
[0004] At present, the production method of nano-scale starch is mainly chemical synthesis, such as nano-starch particles synthesized by inverse microemulsion polymerization. Although this method can prepare micron-sized, sub-micron-sized and even nano-sized starch nanoparticles, the yield is low and processing is difficult. High cost and narrow application range
Other methods such as ball milling, supersonic airflow milling and other methods to prepare nano-starch have disadvantages such as low efficiency, high energy consumption, and long processing time, making it difficult to popularize and apply them in production.
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Embodiment 1
[0019] This embodiment includes the following steps:
[0020] (1) Preparation of rice starch: Take a certain amount of rice, add water equivalent to twice the weight of the rice and soak for 2 hours, grind it through a colloid mill, and add a mass equivalent to twice the dry weight of the raw rice to the ground rice flour liquid The concentration is 0.2% sodium hydroxide solution, pour out the soaking solution after soaking for 24 hours;
[0021] Washing: add clear water, centrifuge, discard the supernatant; repeat the washing step 3 times, remove most of the protein and lipids in the rice flour, and obtain the alkali-treated wet starch;
[0022] Stir the alkali-treated wet starch with water to dissolve it into starch milk, adjust the pH to 9 with sodium hydroxide solution, add alkaline protease equivalent to 0.2% of the dry basis weight of raw rice, and incubate at 40°C for 20 hours. Further remove the remaining protein, lipid and other components in the rice flour, centrifu...
Embodiment 2
[0029] This embodiment includes the following steps:
[0030] (1) Preparation of rice starch: Take a certain amount of rice, add water equivalent to twice the weight of the rice, soak for 2 hours, pulverize it through a colloid mill, and add a mass equivalent to twice the dry weight of the rice raw material to the pulverized rice flour liquid Sodium hydroxide solution with a concentration of 0.2%, pour out the soaking solution after soaking for 24 hours;
[0031] Washing: add clear water, centrifuge and discard the supernatant; repeat the washing step 4 times to remove most of the protein and lipids in the rice flour to obtain alkali-treated wet starch;
[0032] Stir the alkali-treated wet starch with water to dissolve it into starch milk, adjust the pH to 9 with sodium hydroxide solution, add alkaline protease equivalent to 0.2% of the dry basis weight of raw rice, and incubate at 40°C for 20 hours. Further remove the remaining protein, lipid and other components in the rice...
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Abstract
The invention relates to a preparation method of rice starch nano-sized crystals. The preparation method includes: using rice as the raw material, grinding the rice into powder, compositely treating with alkali and alkaline protease to prepare rice starch, and combining super-high-pressure homogenizing and sulfuric digestion to prepare the rich starch into the rice starch nano-sized crystals. The rice starch nano-sized crystals prepared by the method have the advantages that the average particle size of the rice starch nano-sized crystals is smaller than 150 nanometers, and the rice starch nano-sized crystals can be easily biodegraded and are environmental friendly; the rice starch nano-sized crystals are high in surface absorption force and good in dispersity, solubility and enzymolysis performance; the rice starch nano-sized crystals are cream-like soft and smooth in texture, quite easy to digest and absorb, fine and smooth in taste, low in calorie and the like, and the rice starch nano-sized crystals can be used as fat substitutes, food seasoning, the sugar coating of candy and the excipient of tablets. The preparation method is simple in in process and low in cost. The rice starch nano-sized crystals can also be used as nano medicine carriers through biological modification and are quite wide in application range.
Description
technical field [0001] The invention relates to a method for preparing rice starch nanocrystals. Background technique [0002] my country is the world's largest producer and consumer of rice. More than 65% of the country's population takes rice as a staple food. However, the loss rate of my country's grain storage is as high as 10%, which is about 9% higher than that of developed countries. The grain loss was as high as 24 million tons, which brought huge losses to the national finance and grain depots. Therefore, it is necessary to establish a grain conversion system as soon as possible to increase the utilization value and added value of grain and promote the sustainable development of grain production in our country. [0003] The main component of rice is starch (accounting for more than 80%). Compared with other grain starch granules, rice starch granules are very small (particle size 3-5 microns), and other grains such as corn, wheat and other starch granules have a par...
Claims
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Application Information
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Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/06
CPCC08B31/063
Inventor 肖华西林亲录王素燕白婕杨涛张琳许东丁玉琴卢锟杨英吴伟吴跃
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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