Preparation process for slow-release type chlorine dioxide microcapsule antibacterial film

A chlorine dioxide and preparation process technology, which is applied in the field of preparation of slow-release chlorine dioxide microcapsule antibacterial films, can solve the problems of short chlorine dioxide action time and poor antibacterial effect, and achieve the effect of prolonging the effective period of antibacterial

Active Publication Date: 2017-11-17
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a preparation process of slow-release chlorine diox

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0020] The preparation process of the chlorine dioxide microcapsules is: dissolving gelatin in a stable chlorine dioxide aqueous solution, dissolving it in a constant temperature water bath at 40°C for 60 minutes, and obtaining a gelatin concentration of 1-100g / L in the aqueous phase solution; Dissolve PLA in dichloromethane, stir for 120min under mechanical stirring condition, and the PLA concentration in the obtained oil phase solution is 1-200g / L; put the oil phase solution on a mechanical stirrer and stir, add Span 80 while stirring Emulsifier, stir well and add water phase solution, then add liquid paraffin under high-speed stirring at 300-2000r / min and continue stirring, then stir with magnetic stirrer at low speed of 200r / min for 120-240min, volatilize dichloromethane, vacuum pump Filter and freeze-dry to obtain chlorine dioxide microcapsule powder.

[0021] The preparation process of the slow-release chlorine dioxide antibacterial film is: dissolving PLA in dichloromet...

Embodiment 1

[0026] Embodiment 1, the preparation technology of antibacterial film is as follows:

[0027] 1) Preparation of chlorine dioxide microcapsules: Dissolve 0.1 g of gelatin in 100 ml of stable chlorine dioxide aqueous solution with a concentration of 37,000 mg / L, and dissolve in a constant temperature water bath at 40°C for 60 minutes to obtain an aqueous phase solution for later use. Dissolve 0.1 g of PLA in 100 ml of dichloromethane and stir for 120 min under mechanical stirring to completely dissolve it to obtain an oil phase solution. Measure 30ml of the oil phase solution and place it on a mechanical stirrer for stirring, add 0.3ml of Span 80 emulsifier while stirring, add 30ml of the water phase solution after stirring evenly, stir at 300r / min for 5min, then add 20ml of liquid paraffin, continue After stirring for 1 min, transfer to a magnetic stirrer and stir at a low speed of 200 r / min for 180 min to evaporate dichloromethane. Vacuum filtration, freeze-drying to obtain m...

Embodiment 2

[0030]Embodiment 2, the preparation technology of antibacterial film is as follows:

[0031] 1) Preparation of chlorine dioxide microcapsules: Dissolve 5 g of gelatin in 100 ml of stable chlorine dioxide aqueous solution with a concentration of 37,000 mg / L, and dissolve in a constant temperature water bath at 40° C. for 60 minutes to obtain an aqueous phase solution for later use. Dissolve 10g of PLA in 100ml of dichloromethane and stir for 120min under mechanical stirring to completely dissolve it to obtain an oil phase solution. Measure 30ml of the oil phase solution and place it on a mechanical stirrer for stirring, add 3ml of Span 80 emulsifier while stirring, add 3ml of the water phase solution after stirring evenly, stir at a high speed of 1200r / min for 2min, add 20ml of liquid paraffin, and continue stirring After 1 min, the transfer was stirred with a magnetic stirrer at a low speed of 200 r / min for 180 min to evaporate dichloromethane. Vacuum filtration, freeze-dryin...

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Abstract

The invention discloses a preparation process for a slow-release type chlorine dioxide microcapsule antibacterial film. The preparation process comprises the following operation steps: 1, preparing microcapsule powder: dissolving gelatin in a stable chlorine dioxide aqueous solution to obtain a water-phase solution; dissolving PLA in dichloromethane to obtain an oil-phase solution; and adding a Span-80 emulsifier into the oil-phase solution, then adding the water-phase solution and liquid paraffin, performing stirring, performing vacuum filtration, and performing lyophilization to obtain the chlorine dioxide microcapsule powder; and 2, preparing the antibacterial film: adding the chlorine dioxide microcapsule powder, an activator and a plasticizer to a film-forming base material PLA, performing uniform stirring, allowing the stirred materials to stand for 60min for eliminating bubbles, and performing coating by a flat-board coating machine to form the film. According to the invention, the antibacterial film prepared by adopting the method has the advantages of wide raw material sources, safety and sanitation, biodegradability and the like, and the antibacterial film has powerful antibacterial effects, a long slow-release period, and wide application prospects in a freshness-retaining respect of fresh foods.

Description

technical field [0001] The invention relates to a preparation method of an edible film, in particular to a preparation process of a slow-release chlorine dioxide microcapsule antibacterial film. technical background [0002] Chlorine dioxide (ClO 2 ) is a safe, efficient, broad-spectrum, powerful non-toxic fungicide confirmed by the United Nations World Health Organization (WHO). Chlorine substitution reaction will not occur, so it will not produce carcinogenic and mutagenic organic chlorinated products, and is listed as A1-level safe disinfectant by WHO. Microcapsule technology is a technology that uses film-forming materials to embed solids, liquids or gases into clathrates with functional core-shell structures. The clathrates prepared are called microcapsules, and the particle size of the microcapsules is usually from a few microns to thousands of microns. Among them, the inner wrapped material is called the core material, also called the guest molecule, and the outer c...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L89/00C08K9/10C08K3/20C08K5/092C08J5/18
CPCC08J5/18C08J2367/04C08J2467/04C08J2489/00C08L67/04C08L2201/06C08L2203/16C08L89/00C08K9/10C08K3/20C08K5/092
Inventor 黄崇杏张保东李志嘉柳英苏红霞李翠翠黄丽婕鲁鹏刘杨张波波宗宝党秀洁殷诚
Owner GUANGXI UNIV
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