A method of photocatalytic synthesis of a jackfruit filament polysaccharide antibacterial membrane

A technology of jackfruit shreds and antibacterial film, applied in the field of photocatalytic synthesis of jackfruit shredded polysaccharide antibacterial film, to achieve the effects of extending shelf life, improving dispersibility, and eliminating white pollution

Active Publication Date: 2017-05-10
LINGNAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nano-TiO 2 The introduction of polysaccharide (especially jackfruit silk polysaccharide) film has not been reported at home and abroad

Method used

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  • A method of photocatalytic synthesis of a jackfruit filament polysaccharide antibacterial membrane
  • A method of photocatalytic synthesis of a jackfruit filament polysaccharide antibacterial membrane
  • A method of photocatalytic synthesis of a jackfruit filament polysaccharide antibacterial membrane

Examples

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Effect test

Embodiment 1

[0035] The jackfruit silk degreasing powder and distilled water (80℃) were mixed and extracted at a ratio of 1:30 (v / v) for 3 hours, then concentrated by rotary evaporation to 1 / 3 to 1 / 4 of the original volume, and then 2.5 times of absolute ethanol was added. Leave it for 12 hours, centrifuge (8000r / min, 10min) to separate, freeze-dry the resulting precipitate to obtain jackfruit shredded polysaccharide; then dissolve the jackfruit shredded polysaccharide powder in deionized water to prepare approximately 50% polysaccharide solution, and mix with glycerin at a ratio of 1: The mass ratio of 0.016 was mixed and stirred for 1 hour, and then the water bath was heated to 80°C for 30 minutes, followed by vacuum degassing; the titanium dioxide (TiO 2 ) The particles are added to deionized water and ultrasonically dissolved; then 0.5% (w / w) TiO 2 The solution was slowly added to the heat-treated polysaccharide solution, stirred moderately for 30 minutes, and then placed in a photocataly...

Embodiment 2

[0040] The jackfruit silk degreasing powder and distilled water (80℃) were mixed and extracted at a ratio of 1:30 (v / v) for 3 hours, then concentrated by rotary evaporation to 1 / 3 to 1 / 4 of the original volume, and then 2.5 times of absolute ethanol was added. Leave it for 12 hours, centrifuge (8000r / min, 10min) to separate, freeze-dry the resulting precipitate to obtain jackfruit shredded polysaccharide; then dissolve the jackfruit shredded polysaccharide powder in deionized water to prepare approximately 50% polysaccharide solution, and mix with glycerin at 1: The mass ratio of 0.016 is mixed and stirred for 1 hour, and then the water bath is heated to 70°C for 45 minutes, followed by vacuum degassing; the titanium dioxide (TiO 2 ) The particles are added to deionized water and ultrasonically dissolved; then 1% (w / w) TiO 2 The solution was slowly added to the heat-treated polysaccharide solution, stirred moderately for 30 minutes, and then placed in a photocatalytic reactor (50...

Embodiment 3

[0045] The jackfruit silk degreasing powder and distilled water (80℃) were mixed and extracted at a ratio of 1:30 (v / v) for 3 hours, then concentrated by rotary evaporation to 1 / 3 to 1 / 4 of the original volume, and then 2.5 times of absolute ethanol was added. Leave it for 12 hours, centrifuge (8000r / min, 10min) to separate, freeze-dry the resulting precipitate to obtain jackfruit shredded polysaccharide; then dissolve the jackfruit shredded polysaccharide powder in deionized water to prepare approximately 50% polysaccharide solution, and mix with glycerin at 1: The mass ratio of 0.016 was mixed and stirred for 1 hour, and then the water bath was heated to 90°C for 20 minutes, followed by vacuum degassing; the titanium dioxide (TiO 2 ) The particles are added to deionized water and ultrasonically dissolved; then 2% (w / w) TiO 2 The solution was slowly added to the heat-treated polysaccharide solution, stirred moderately for 30 minutes, and then placed in a photocatalytic reactor (...

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Abstract

A method of photocatalytic synthesis of a jackfruit filament polysaccharide antibacterial membrane is disclosed. The method includes S1) mixing and extracting jackfruit filament degreased powder with water for 2-4 h, then performing concentration, adding ethanol into the product of concentration, allowing the mixture to stand, and centrifuging and separating the mixture to obtain a precipitate A; S2) preparing the precipitate A into a polysaccharide solution having a concentration of 40-60%, fully mixing the polysaccharide solution with glycerin in a mass ratio of 1:0.016, and then heating the mixture with a water bath to obtain a solution B; S3) adding titanium dioxide particles into water and performing ultrasonic dissolution to obtain a solution C; and S4) adding the solution C into the solution B slowly, performing photocatalytic treatment, then evenly pouring the mixture to a culture dish and finally performing vacuum drying to obtain the antibacterial membrane. The antibacterial membrane has good mechanical performance, water vapor barrier performance and optical characteristics, and also has surface antibacterial activity, thus meeting food package strength requirements and mechanical processing requirements, overcoming the food safety problem caused by microbial breeding on surfaces during a food storage process and expanding deep development and utilization of jackfruit leftovers.

Description

Technical field [0001] The invention belongs to the technical field of preparation of antibacterial film materials, and more specifically relates to a method for photocatalytic synthesis of jackfruit silk polysaccharide antibacterial film. Background technique [0002] One of the ways for humans to infect bacteria is through imported food, and food packaging materials are generally in direct contact with food. The rich nutrients of food become the source of nutrients for microorganisms to breed and multiply in the high humidity internal packaging environment, so in order to maintain The storage stability of food usually requires the addition of a large amount of preservatives in food preservation, which brings greater hidden dangers to food safety, so it is particularly important to develop and use edible food packaging films with antibacterial preservation functions. Among them, the natural edible polysaccharide film material has a wide range of sources, is non-toxic and non-pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L5/00C08K3/22C08K5/053
CPCC08J5/18C08J2305/00C08K3/22C08K5/053C08K2003/2241C08K2201/011C08L2201/06C08L2201/14C08L5/00
Inventor 金蓓周小松
Owner LINGNAN NORMAL UNIV
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