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Alpha-cyclodextrin modified starch slurry and preparation method thereof

A cyclodextrin, starch technology, used in fiber processing, textiles and paper, fiber types, etc.

Inactive Publication Date: 2019-02-01
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Not only that, most of the previous studies were limited to the immobilization of β-cyclodextrin on various materials, but there were few studies on the immobilization of α-cyclodextrin on natural macromolecules such as starch and chitosan

Method used

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  • Alpha-cyclodextrin modified starch slurry and preparation method thereof
  • Alpha-cyclodextrin modified starch slurry and preparation method thereof
  • Alpha-cyclodextrin modified starch slurry and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0021] The present invention simultaneously designs a preparation method of α-cyclodextrin-immobilized starch (preparation method for short), the preparation method adopts the composition of the raw material mass fraction of α-cyclodextrin-immobilized starch according to the present invention and the following process steps : 50 parts of corn starch; 50 parts of α-cyclodextrin; 20 parts of malic acid; 7.5 parts of sodium hypophosphite; 300 parts of deionized water.

[0022] (1) Make a starch suspension from the stated number of raw corn starch, α-cyclodextrin and 200 parts of deionized water, transfer it to a 500mL three-neck flask, place it in a water bath at 85°C, and connect the condensing device. Heat gelatinization for 30 minutes, then add 100 parts of the solution containing the said parts of malic acid and sodium hypophosphite through a constant pressure dropping funnel, stir evenly, transfer the mixture to an oven at 120°C for 2 hours and take it out.

[0023] (2) Afte...

Embodiment 1

[0040] (1) Weigh 50g of starch, 50g of α-cyclodextrin and 200mL of distilled water in a 500mL three-necked round-bottomed flask, heat and gelatinize in a water bath at 85°C for 30min, then add 100mL of a solution containing 20g of malic acid and 7.5g of sodium hypophosphite , after stirring evenly, the mixture was transferred into an oven at 120° C. for 2 h.

[0041] (2) After the reaction, take out and pulverize, wash twice with 100 mL of distilled water, and wash twice with 100 mL of 75% ethanol solution.

[0042] Immobilization effect test: Refer to the determination method of CS-αCD substitution degree in the previous section to determine relevant parameters. The calculated substitution degree and reaction efficiency data of this embodiment are listed in Table 1, and the structure characterization can be found in figure 1 and figure 2 .

Embodiment 2

[0044] (1) Weigh 50g of starch, 25g of α-cyclodextrin and 200mL of distilled water into a 500mL three-neck round bottom flask, heat and gelatinize in a water bath at 85°C for 30min, then add 100mL of a solution containing 20g of malic acid and 7.5g of sodium hypophosphite , after stirring evenly, the mixture was transferred into an oven at 120° C. for 2 h.

[0045] (2) After the reaction, take out and pulverize, wash twice with 100 mL of distilled water, and wash twice with 100 mL of 75% ethanol solution.

[0046] The calculated immobilization rate of this embodiment is listed in Table 1.

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Abstract

The invention relates to the technology for modified starch slurry for textiles, and in particular, relates to alpha-cyclodextrin immobilized starch and a preparation method thereof. The alpha-cyclodextrin immobilized starch is characterized by comprising the raw materials of the starch in parts by mass: 50 parts of corn starch, 50 parts of alpha-cyclodextrin, 20 parts of malic acid, 7.5 parts ofsodium hypophosphite and 300 parts of deionized water. The technical scheme to solve the technical problems of the preparation method comprises that the preparation method of the alpha-cyclodextrin immobilized starch (CS-[alpha]CD) is designed; the preparation method adopts the raw material mass composition of the acetylated corn starch and the following technological steps: (1) preparing a starchsuspension from the corn starch, [alpha]-cyclodextrin and 200 parts of deionized water, transferring to a 500 mL three-neck flask, placing in a 85 DEG C water bath pot, turning on a condensing device, heating and gelatinizing for 30 min, then adding 100 parts of a solution containing malic acid and sodium hypophosphite with the weight part through a constant pressure dropping funnel, stirring evenly, transferring the mixture into a 120 DEG C oven, carrying out reaction for 2 h and taking out the mixture; and (2) after the reaction is finished, taking out the product, crushing, washing twice with deionized water, washing twice with 75% ethanol, and centrifuging and drying to obtain the sample [alpha]-cyclodextrin immobilized starch, namely CS-[alpha]CD.

Description

technical field [0001] The invention relates to the denatured starch size technology for textiles, in particular to α-cyclodextrin immobilized starch and a preparation method thereof. Background technique [0002] As the main sizing material for warp yarn sizing, starch has a wide range of sources and is cheap, but the sizing procedure is cumbersome and the sizing performance is not satisfactory. The emergence of PVA has solved the sizing problem of hydrophobic fibers, and its excellent film-forming performance is considered to be a revolution in warp sizing. However, PVA is difficult to degrade and pollutes the environment, and is considered as an unclean slurry. Since starch is rich in resources and easy to degrade, people can use the characteristics of starch macromolecular structure to chemically or physically denature starch to improve the practical performance of starch. One idea to replace PVA is to denature starch to achieve the purpose of removing PVA alone or mix...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/00D06M15/11D06M15/03D06M13/207D06M11/70
CPCC08B31/00D06M11/70D06M13/207D06M15/03D06M15/11D06M2200/40
Inventor 张昊李雅兴张毅
Owner TIANJIN POLYTECHNIC UNIV
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