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Nano freshness protection bag material as well as preparation method and application thereof

A fresh-keeping bag and nanotechnology, applied in the field of nano-fresh-keeping bag materials and its preparation, can solve the problems of not taking into account the antibacterial performance of the environment inside the fresh-keeping bag, making it difficult to realize the continuous utilization of fresh-keeping materials, and limiting the application effect of fresh-keeping bags, so as to reduce the Browning index and pulp autolysis index, good fresh-keeping effect, and the effect of delaying the increase of relative permeability

Active Publication Date: 2021-08-03
GUANGXI ZHUANG AUTONOMOUS REGION ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Fresh-keeping bags are widely used in daily life. Fresh-keeping bags are divided into polyethylene (PE), polyvinyl chloride (PVC), polyvinylidene chloride according to the material (PVDC) and other types, PE and PVDC fresh-keeping bags are relatively safe, PE is mainly used for the packaging of fruits and vegetables, PVDC is mainly used for the packaging of some cooked food, ham, etc., but no matter what kind of fresh-keeping bags, their antibacterial properties are poor , it is easy to cause bacteria to contaminate the items, thereby reducing the storage time of the items. For this reason, we propose an antibacterial fresh-keeping bag
[0004]Existing antibacterial fresh-keeping bags generally add antibacterial substances from raw materials to achieve antibacterial properties of fresh-keeping bags, and do not take into account the environment inside the fresh-keeping bags Therefore, the application effect of fresh-keeping bags is limited; in addition, the existing methods of adding antibacterial substances are extremely easy to lose, and are usually discarded after one use, which not only causes a waste of resources, but also causes certain damage to the environment. pollution, it is difficult to achieve sustainable utilization of fresh-keeping materials

Method used

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  • Nano freshness protection bag material as well as preparation method and application thereof
  • Nano freshness protection bag material as well as preparation method and application thereof
  • Nano freshness protection bag material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A nano fresh-keeping bag material, comprising the following raw materials in parts by weight: 1000 parts of high-pressure polyethylene, 15 parts of wheat stone powder, 10 parts of nano-titanium dioxide, 10 parts of nano-chitosan, 5 parts of acrylate, 1 part of nano-graphene, 1 part Plant extract, 1 part of auxiliary agent; the auxiliary agent is polyethylene glycol; plant extract is 1 part of mango peel extract, 2 parts of mango core extract;

[0050] The preparation of the mango peel extract: take fresh mango peel, wash, dry, pulverize and sieve to obtain mango peel powder, add the mango peel powder into a subcritical high-pressure reactor, and add the powder mass 2 times the ethanol solvent, extract at 40°C and 1.5 MPa for 20 minutes, quickly cool in the cooler, recover ethanol after suction filtration, concentrate under reduced pressure until there is no alcohol smell, continue to concentrate under reduced pressure until the density is 1.1 to obtain Mango peel extrac...

Embodiment 2

[0057] A nano fresh-keeping bag material, comprising the following raw materials in parts by weight: 1200 parts of high-pressure polyethylene, 20 parts of wheat stone powder, 25 parts of nano-titanium dioxide, 15 parts of nano-chitosan, 12 parts of acrylate, 3 parts of nano-graphene, 2 parts Plant extractant, 2 parts of auxiliary agent; said auxiliary agent is nano-silicon carbide; plant extractant is 2 parts of mango peel extract, 6 parts of mango core extract;

[0058] The preparation of the mango peel extract: take fresh mango peel, wash, dry, pulverize and sieve to obtain mango peel powder, add the mango peel powder into a subcritical high-pressure reactor, and add the powder mass 4 times the ethanol solvent, extract at a temperature of 60°C and a pressure of 3 MPa for 25 minutes, quickly cool in a cooler, recover ethanol after suction filtration, concentrate under reduced pressure until there is no alcohol smell, continue to concentrate under reduced pressure to a density ...

Embodiment 3

[0065] A nano fresh-keeping bag material, comprising the following raw materials in parts by weight: 1100 parts of high-pressure polyethylene, 16 parts of wheat stone powder, 15 parts of nano-titanium dioxide, 12 parts of nano-chitosan, 6 parts of acrylate, 2 parts of nano-graphene, 1.2 parts Plant extractant, 1.2 parts of auxiliary agent; Said auxiliary agent is the composition of polyethylene glycol, starch grafted sodium polyacrylate, and nano-silicon carbide according to the mass ratio of 5:8:1; Plant extractant is 1.5 parts of mango peel extract, 4 parts mango pit extract;

[0066] The preparation of the mango peel extract: take fresh mango peel, wash, dry, pulverize and sieve to obtain mango peel powder, add the mango peel powder into a subcritical high-pressure reactor, and add the powder mass 3 times the ethanol solvent, extract at a temperature of 50°C and a pressure of 2 MPa for 22 minutes, quickly cool in a cooler, recover ethanol after suction filtration, concentra...

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Abstract

The invention discloses a nano freshness protection package material as well as a preparation method and application thereof, belongs to the technical field of fruit freshness protection materials and application, and provides a nano freshness protection package material which comprises the following raw materials in parts by weight: 1000-1200 parts of high-pressure polyethylene, 15-20 parts of maifanstone powder, 10-25 parts of nano titanium dioxide, 10-15 parts of nano chitosan, 5-12 parts of acrylate, 1-3 parts of nano graphene, 1-2 parts of a plant extracting agent and 1-2 parts of an auxiliary agent. A nanometer freshness protection bag disclosed by the invention is a selective bidirectional semipermeable membrane, can automatically adjust humidity and density of gases such as O2, CO2 and N2, overcomes the defect that a traditional thin film is insufficient in CO2 and O2 permeation regulation and control, integrates double effects of gas regulation and bacteriostasis, is suitable for storage under a low-temperature condition, effectively delays aging and decay of fruits and vegetables, and improves storage quality and freshness protection effect.

Description

technical field [0001] The invention belongs to the technical field of fruit fresh-keeping materials and applications, in particular to a nano-sized fresh-keeping bag material and its preparation method and application. Background technique [0002] Fruits are easily affected by external factors such as physical, chemical, and biological factors during production, processing, transportation, and storage, resulting in a decrease in their quality. Packaging can not only avoid the adverse effects caused by the above factors, but also endow them with Food appearance aesthetics. From the perspective of the root cause of food spoilage, microbial activity is the main cause of its quality decline. Therefore, the use of fresh-keeping packaging systems to control microorganisms in food preservation is one of the important ways to prolong food storage. [0003] Fresh-keeping bags are widely used in daily life. According to the production materials, fresh-keeping bags are divided into ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L71/02C08L51/02C08K13/06C08K9/04C08K3/04C08K3/22C08K3/34C08K5/00C08J5/18
CPCC08J5/18C08J2323/06C08J2471/02C08J2451/02C08K13/06C08K9/04C08K9/08C08K3/042C08K2003/2241C08K2201/011C08K3/34C08K5/0058Y02W90/10
Inventor 李丽孙健易萍刘国明李之伟唐杰李昌宝何雪梅盛金凤李杰民辛明叶冬青杨莹周主贵郑凤锦唐雅园李志春
Owner GUANGXI ZHUANG AUTONOMOUS REGION ACAD OF AGRI SCI
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