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Preparation method and application of sodium alginate/chitosan/glucosyl-beta-cyclodextrin composite film

A sodium alginate and glucose-based technology is applied in the field of preparation of sodium alginate/chitosan/glucosyl-β-cyclodextrin composite membrane, which can solve the problems of insufficient mechanical strength and poor water resistance, and achieve excellent mechanical properties. performance, good film formation, and the effect of improving application prospects

Inactive Publication Date: 2020-03-31
BENGBU COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most single polysaccharide material membranes have shortcomings such as insufficient mechanical strength and poor water resistance, and the comprehensive performance needs to be further improved

Method used

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  • Preparation method and application of sodium alginate/chitosan/glucosyl-beta-cyclodextrin composite film
  • Preparation method and application of sodium alginate/chitosan/glucosyl-beta-cyclodextrin composite film
  • Preparation method and application of sodium alginate/chitosan/glucosyl-beta-cyclodextrin composite film

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0041] This case provides a preparation method and application of a sodium alginate / chitosan / glucosyl-β-cyclodextrin composite film of an embodiment, including the following steps:

[0042] S1: Add 1.5-3.5g of sodium alginate into 46.5-48.5ml of distilled water, stir in a constant temperature water bath at 60°C, then let stand for defoaming to obtain SA film liquid;

[0043] S2: Weigh 0.3-0.7g of chitosan with a molecular weight of 10kDa and a degree of deacetylation of 85%, 0.3-0.7g of glucosyl-β-cyclodextrin, and 0.4-0.8g of glycerol, and add 47.8-49g of 2% in sequence In the acetic acid solution, after stirring in a constant temperature water bath at 60°C, let it stand for defoaming to obtain a CS / Glc-β-CD / GL blend film solution;

[0044] S3: Mix the SA membrane solution with the CS / Glc-β-CD / GL blend membrane solution, stir it magnetically at 500rpm for 120min, and remove the air bubbles by ultrasonic waves with a frequency of 20KHz and a power of 300W to obtain SA / CS / Glc-β...

Embodiment 1～5

[0049] Examples 1-5 study the influence of different concentrations of CS on the performance of composite membranes

[0050] The concentration of CS in the SA / CS / Glc-β-CD / GL blended film-forming solution of Examples 1 to 5 was 0.3%, 0.4%, 0.5%, 0.6%, and 0.7%, but the concentrations of other components remained the same, SA The concentrations were all 3.0%, the Glc-β-CD concentrations were all 0.5%, and the GL concentrations were all 0.6%. The composite membrane was prepared according to the above method, and the composite membrane was tested according to Table 1, and the average value was taken in parallel three times.

[0051] Test Results and Analysis

[0052] A1. The effect of chitosan (CS) concentration on the actual water vapor transmission coefficient (WVP) of the composite membrane

[0053] figure 2 It is the effect diagram of the concentration of chitosan (CS) on the actual water vapor transmission coefficient (WVP) of the composite film. It can be seen from 2 tha...

Embodiment 3

[0060] Embodiment 3, 6~10 research different concentration SA to the influence of composite film performance Keeping CS concentration is 0.5%, Glc-β-CD concentration is 0.5%, GL concentration is under the situation of 0.6% constant, embodiment 6~10 The SA concentration in the SA / CS / Glc-β-CD / GL blended film-forming liquid is 1.5%, 2.0%, 2.5%, and 3.5% in sequence, and the film-forming liquid of Example 3 corresponds to the SA concentration of 3.0%. The composite membrane was prepared according to the above method, and the composite membrane was tested according to Table 1, and the average value was taken in parallel three times.

[0061] Test Results and Analysis

[0062] B1. The effect of sodium alginate (SA) concentration on the actual water vapor transmission coefficient (WVP) of the composite membrane

[0063] Figure 6 is the influence diagram of the concentration of sodium alginate (SA) on the actual water vapor transmission coefficient (WVP) of the composite membrane, ...

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Abstract

The invention discloses a preparation method and application of a sodium alginate / chitosan / glucosyl-beta-cyclodextrin composite film. The composite film is applied to fresh food preservation, and a blending film-forming solution for film preparation comprises the following components in percentage by concentration: 1.5 to 3.5% of SA, 0.3 to 0.7% of CS, 0.3 to 0.7% of Glc-beta-CD and 0.4 to 0.8% ofGL. According to the invention, electrostatic interaction of chitosan and sodium alginate and hydrogen-bond interaction of glucosyl-beta-cyclodextrin are utilized for blending modification, and thena crosslinking reaction between a CaCl2 solution and a polysaccharide composite film is utilized for chemical modification, so the comprehensive performance of the polysaccharide film is remarkably improved, and the application prospect of the polysaccharide film is promoted.

Description

technical field [0001] The invention belongs to the technical field of polymer material membranes, and in particular relates to a preparation method and application of a sodium alginate / chitosan / glucose-β-cyclodextrin composite membrane. Background technique [0002] Polymer material film is a film prepared by mixing, casting, cross-linking and other processes based on polymer compounds; it can also be dispersed on the outer surface of the object in the form of direct contact with the film liquid by spraying, dipping or coating. Dry at room temperature to form a film. Polymer material membranes mainly include protein polymer material membranes and polysaccharide polymer material membranes. Among them, polysaccharide polymer material membranes have the advantages of strong film formation and excellent oxygen resistance, and some polysaccharides also have certain inhibitory properties. Bacteriality has become one of the hot materials for the preparation of edible food packagi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L5/04C08L5/08C08L5/16C08K5/053C08J5/18C08J3/24B65D65/38
CPCB65D65/38C08J3/246C08J5/18C08J2305/04C08J2405/08C08J2405/16C08K5/053
Inventor 李妍李艳俞雅文曹珂珂李慧韩卓
Owner BENGBU COLLEGE
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