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A kind of preparation method of the ph intelligent responsive membrane that firmly locks anthocyanidin

A kind of anthocyanin and responsive film technology, applied in transportation and packaging, packaging, wrapping paper, etc., can solve the problems of poor durability, large pigment migration, etc., and achieve the effect of improving overall performance, reducing the probability of loss, and increasing the service life

Active Publication Date: 2020-07-28
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the technical problems of large pigment migration and poor durability in existing packaging films that use natural pigments as indicators, and provides a preparation method for a pH intelligent response film that firmly locks anthocyanins

Method used

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  • A kind of preparation method of the ph intelligent responsive membrane that firmly locks anthocyanidin
  • A kind of preparation method of the ph intelligent responsive membrane that firmly locks anthocyanidin
  • A kind of preparation method of the ph intelligent responsive membrane that firmly locks anthocyanidin

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specific Embodiment approach 1

[0017] Specific implementation mode 1: The preparation method of the pH intelligent response membrane that firmly locks the anthocyanidin in this embodiment is carried out according to the following steps:

[0018] 1. Take carboxymethyl cellulose (CMC), artemisia gum (ASKG), glycerin and anthocyanin extract;

[0019] 2. Dissolve carboxymethyl cellulose and artemisia gum in water, stir for 2-4 hours at a temperature of 50-70°C and a speed of 800-1200 rpm; then add glycerin and continue stirring for 15-30 minutes; then add cyanine Continue to stir the element extract solution for 15-30 minutes; obtain the film-forming solution;

[0020] 3. Vacuum defoaming the film-forming solution, then casting to form a film, and drying at a temperature of 70-80° C. for 24-36 hours to obtain a pH-smart responsive film that firmly locks anthocyanidin.

specific Embodiment approach 2

[0021] Specific embodiment two: what this embodiment is different from specific embodiment one is the preparation method of the anthocyanin extract in step one, carry out according to the following steps:

[0022] a. Adding purple cabbage powder to an ethanol aqueous solution with a concentration of 50% to 60% by mass, extracting for 1 to 2 hours at an ultrasonic power of 500 to 600W and a temperature of 50 to 55°C to obtain a mixture;

[0023] b. The mixture is filtered with suction, and the filtrate is concentrated by rotary evaporation at a temperature of 50-55° C. to obtain an anthocyanin extract;

[0024] Others are the same as the first embodiment.

specific Embodiment approach 3

[0025] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the mass ratio of carboxymethyl cellulose, artemisia gum and glycerin in step one is 1: (5-6): (3-5), The mass of anthocyanins in the anthocyanin extract accounts for 5% to 15% of the total mass of carboxymethyl cellulose, artemisia gum and glycerin; the others are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention discloses a preparation method of an intelligent pH responding film for firmly retaining anthocyanidin and relates to a preparation method of an intelligent pH packaging film material. The invention is designed to solve the technical problems of large pigment mobility and poor durability in the existing packaging film using natural pigment as an indicator. The preparation method comprises the following steps of: dissolving carboxymethylcellulose and artemisia desterorum spreng gum in water, adding glycerinum, stirring, and finally adding anthocyanidin extracting solution to obtain film-forming solution; casting the film-forming solution into a film, and then drying to obtain the intelligent pH responding film for firmly retaining the anthocyanidin. The intelligent pH responding film prepared by the invention can be used for the packaging field.

Description

technical field [0001] The invention relates to a preparation method of a pH intelligent packaging film material, belonging to the field of packaging films. Background technique [0002] In recent years, intelligent packaging film materials have been widely developed. They can not only block the external environment to avoid food corruption, but also intuitively convey the freshness of the packaged food to consumers. It mainly uses the pH change caused by the corruption of protein substances in the packaged food to change the chemical structure of the indicator pigment, and then change the color, giving consumers intuitive information about the freshness of the food. In the existing intelligent packaging materials, the indicators showing color changes are chemical synthetic products or naturally extracted pigments. Chemical synthetic product indicator pigments are potentially harmful to the human body and the environment. Under the general trend of sustainable development, w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L1/28C08L5/00C08K5/053C08K5/1545B65D65/38
CPCB65D65/38C08J5/18C08J2401/28C08J2405/00C08K5/053C08K5/1545
Inventor 王立娟梁铁强李坚
Owner NORTHEAST FORESTRY UNIVERSITY
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