Preparation method of linear-chain starch-aliphatic acid compounds with different molecular weights

An amylose and fatty acid technology, applied in the field of biodegradable material preparation, can solve problems such as interfering with experimental results and complex methods, and achieve the effects of simple operation, mild conditions and avoiding residues

Active Publication Date: 2018-08-24
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First, the residual DMSO organic solvent in the complex after purification will interfere with the experimental results, and the use of DMSO in the preparation process limits the application of the complex in food processing
Second, the use of alkaline and acidic solutions will lead to amylose hydrolysis, and these methods for preparing amylose-fatty acid complexes are more complicated

Method used

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  • Preparation method of linear-chain starch-aliphatic acid compounds with different molecular weights

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Weigh 1g amylose (Mw is 200,000) into deionized water, prepare a 5% amylose suspension with mass fraction and put it into a polytetrafluoroethylene reactor, add 0.2g caprylic acid (C8), and mix it Seal, put the sealed reaction kettle in a ventilated oven and mix with vibration at 85°C for 1 hour;

[0025] (2) After vibrating and mixing, heat the suspension in the reaction kettle to 160°C, stop heating, and then stir the suspension to cool to 100°C. After cooling, place the reaction kettle filled with the suspension in a ventilated oven at 85°C. Rotate under heat preservation for 24 hours to obtain amylose-fatty acid complex;

[0026] (3) Dilute the amylose-fatty acid complex with water at 85°C to a mass fraction of 1%, centrifuge at 2000 rpm for 5 minutes, discard the supernatant, collect the precipitate, and wash it with 65°C hot water After 2 times, it was freeze-dried, and finally a white amylose-fatty acid complex powder was obtained.

Embodiment 2

[0028] (1) Weigh 1g amylose (Mw is 200,000) into deionized water, prepare a 5% amylose suspension with mass fraction and put it into a polytetrafluoroethylene reactor, add 0.2g capric acid (C10), and mix After sealing, place the sealed reaction kettle in a ventilated oven and vibrate and mix for 1 hour at 85°C;

[0029] (2) After vibrating and mixing, heat the suspension in the reaction kettle to 160°C, stop heating, and then stir the suspension to cool to 100°C. After cooling, place the reaction kettle filled with the suspension in a ventilated oven at 85°C. Rotate under heat preservation for 24 hours to obtain amylose-fatty acid complex;

[0030] (3) Dilute the amylose-fatty acid complex with water at 85°C to a mass fraction of 1%, centrifuge at 2000 rpm for 5 minutes, discard the supernatant, collect the precipitate, and wash with 70°C hot water After 2 times, it was freeze-dried, and finally a white amylose-fatty acid complex powder was obtained.

Embodiment 3

[0032] (1) Weigh 1g amylose (Mw is 200,000) into deionized water to prepare a 5% amylose suspension with mass fraction and put it into a polytetrafluoroethylene reactor, add 0.2g lauric acid (C12), and mix After sealing, place the sealed reaction kettle in a ventilated oven and vibrate and mix for 1 hour at 85°C;

[0033] (2) After vibrating and mixing, heat the suspension in the reaction kettle to 160°C, stop heating, and then stir the suspension to cool to 100°C. After cooling, place the reaction kettle filled with the suspension in a ventilated oven at 85°C. Rotate under heat preservation for 24 hours to obtain amylose-fatty acid complex;

[0034] (3) Dilute the amylose-fatty acid complex with water at 85°C to a mass fraction of 1%, centrifuge at 2000 rpm for 5 minutes, discard the supernatant, collect the precipitate, and wash with 70°C hot water After 2 times, it was freeze-dried, and finally a white amylose-fatty acid complex powder was obtained.

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Abstract

The invention discloses a preparation method of linear-chain starch-aliphatic acid compounds with different molecular weights, and belongs to the field of preparation of biodegradable materials. The preparation method comprises the following steps: putting a starch suspension solution into a reaction kettle, adding aliphatic acid, mixing and sealing, then putting into a drying box and heating, compounding linear-chain starch with aliphatic acid in the reaction kettle to obtain a compound, diluting the compound by using hot water, carrying out centrifugal separation and collecting precipitates,washing the precipitates and then carrying out freeze drying to obtain the linear-chain starch-aliphatic acid compounds. The preparation method is capable of preparing the linear-chain starch-aliphatic acid compounds with different molecular weights by compounding high-molecular-weight linear-chain starch with aliphatic acids with different carbon chain lengths in water; organic solvents, enzymes, acids or alkalis do not need to be used; the preparation method is environmentally friendly; application of the linear-chain starch-aliphatic acid compounds in starch food and non-food industries isfacilitated.

Description

Technical field [0001] The invention belongs to the field of preparation of biodegradable materials, and particularly relates to a preparation method of amylose-fatty acid complexes with different molecular weights. Background technique [0002] Amylose is a linear polysaccharide made up of D-glucopyranose units connected by α-1,4 glycosidic bonds. It accounts for 20-30% of starch granules. It can interact with various guest molecules including alcohols, polymers, and iodine. It forms complexes with fatty acids through hydrophobic interactions, and is widely used in food processing, starch-based biodegradable materials and responsive polymers. Amylose-fatty acid complexes usually have a single helical structure and can be used to delay the "aging" in breads and other baked products, and to improve the physical properties of starch, such as viscosity and degradation properties. Therefore, the simple synthesis of amylose-fatty acid complex and the controllable adjustment of molecu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B33/00
CPCC08B33/00
Inventor 曹峥张成陈玉园戴雨薇刘春林吴盾成骏峰
Owner CHANGZHOU UNIV
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