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Method for preparing molecule cage type starch

A technology of molecular cage and starch, which is applied in the field of starch preparation, can solve the problems of complex production process, easy collapse, high production cost, etc., and achieve the effects of simple production process, improved edible quality and low production cost

Inactive Publication Date: 2009-12-09
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that current cyclodextrins are not suitable for the adsorption of macromolecules and very small molecules, and the production process is complicated, the production cost is high, the sustained release is relatively poor, and the structure of porous starch is unstable and easy to collapse, resulting in many Physical properties are lower than the problem of native starch, and a preparation method of molecular cage starch is provided

Method used

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  • Method for preparing molecule cage type starch
  • Method for preparing molecule cage type starch
  • Method for preparing molecule cage type starch

Examples

Experimental program
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specific Embodiment approach 1

[0010] Specific embodiment one: the molecular cage starch of this embodiment is prepared according to the following steps: one, prepare starch paste with starch and ethanol with a moisture content of <1%, wherein the mass ratio of starch and ethanol is 7-12:28; two, ball milling Starch paste: the quantity ratio of large balls, medium balls and small balls is 1:4:2, the mass ratio of balls to material is 5-6:1, the speed of the ball mill is 100-300r / min, and the milling time is 20-30h; 3. Dried and pulverized to obtain non-crystallized starch; 4. Dissolve sodium trimetaphosphate with 5% to 8% mass of non-crystallized starch in water, add non-crystallized starch and adjust pH with 5% sodium hydroxide solution The value is 7~11, then put it in the environment of 20~50°C for 2.0~4.0h, and then filter after neutralizing the pH value of the system. Crystallized starch; 5. Add water 10-20 times the weight of cross-linked amorphous starch to cross-linked amorphous starch, gelatinize a...

specific Embodiment approach 2

[0015] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the starch in step 1 is cornstarch. Other steps and parameters are the same as those in Embodiment 1.

[0016] The moisture content of starch > 1% can be evaporated by drying.

[0017] Since the molecular cage corn starch uses the network structure characteristics of the corn starch molecule itself and introduces functional groups, the inherent molecular structure is further stabilized, and it has stable performance, acid resistance stability and thermal stability. The acid-resistant stability and heat-resistant stability of starch can be judged by the change of the viscosity value of starch paste. The smaller the viscosity difference, the higher the heat-resistant stability and acid-resistant stability of starch. The viscosity difference of porous starch measured by Brabender viscometer before and after holding at 95°C for half an hour is 4.52Pa·s, while the viscosity difference of molecular...

specific Embodiment approach 3

[0022] Embodiment 3: The difference between this embodiment and Embodiment 1 is that in step 2, the diameter ratio of the large ball, the medium ball, and the small ball is 4:2:1. Other steps and parameters are the same as those in Embodiment 1.

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Abstract

The invention discloses a method for preparing molecular cage starch, which relates to a method for preparing starch. It solves the problem that cyclodextrin is not suitable for the adsorption of macromolecules and extremely small molecules, and the production process is complicated, the production cost is high, the slow-release performance is relatively poor, and the structure of porous starch is unstable and easy to collapse, resulting in low physical properties. In the original starch problem. Preparation method: 1. making starch paste; 2. ball milling starch paste; 3. drying and pulverizing; 4. molecular cross-linking; 5. grafting and saponification; 6. precipitation and vacuum filtration. The molecular cage starch prepared by the invention has the advantages of tight molecular shell structure, stable structure, loose interior, no collapse, and adjustable pore size in the molecular network. The molecular cage starch prepared by the invention can adsorb molecules of different sizes, and has simple production process, low production cost, which is only 65% ​​of the production cost of cyclodextrin, and good slow-release performance.

Description

technical field [0001] The invention relates to a method for preparing starch. Background technique [0002] The research on adsorbents and embedding agents began in the 1960s. The most commonly used adsorbents and embedding agents are activated carbon, silica gel, activated clay and resins, polyvinyl alcohol, etc., but due to the increasing shortage of resources, high prices, and environmental pollution With the increasing seriousness, the increasing development of life sciences and the increasing demand for natural products, activated carbon, silica gel, activated clay, resin and polyvinyl alcohol can no longer meet people's needs. [0003] As new materials, starch-based adsorbents and embedding agents (cyclodextrin and porous starch) have the advantages of low cost, easy availability, renewability, degradability, wide range of sources and light industrial pollution. Cyclodextrin is a small molecular polymer produced after enzymatic hydrolysis, liquefaction and fermentati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B31/00
Inventor 马莺刘天一李海梅
Owner HARBIN INST OF TECH
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