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Bagging composite material for fruits and vegetables, preparation method therefor and application of bagging composite material

A composite material, fruit and vegetable technology, applied in the direction of botanical equipment and methods, applications, chemicals for biological control, etc., can solve the problems of affecting the effect, poor stability of coating mechanical properties, narrow antibacterial spectrum, etc.

Active Publication Date: 2020-10-27
SOUTH SUBTROPICAL CROPS RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above-mentioned patents have obtained fruit and vegetable bagging materials by means of compounding and mutual matching, there are problems such as single coating film components, narrow antibacterial spectrum, poor mechanical properties and stability of the coating film, which affect the final effect

Method used

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  • Bagging composite material for fruits and vegetables, preparation method therefor and application of bagging composite material
  • Bagging composite material for fruits and vegetables, preparation method therefor and application of bagging composite material
  • Bagging composite material for fruits and vegetables, preparation method therefor and application of bagging composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Preparation of fruit and vegetable bagging composite materials

[0051] (1) Disperse 0.04 g of hydroxyapatite (HAp) nanoparticles in 8 mL of 0.5 wt % chitosan aqueous solution at pH=5, and then ultrasonicate at 20° C. for 5 min to obtain a mixed liquid in which HAp nanoparticles are dispersed.

[0052] (2) Add 8 mL of clove essential oil / citronella oil (volume ratio 1:1) to the mixed solution of HAp nanoparticles dispersed in step (1), and emulsify in a homogenizer at 5000 rpm for 10 min at 30 ° C to obtain Pickering Lotion.

[0053] (3) Pickering emulsion method prepares clove essential oil / citronella oil-chitosan-based micro-nanocapsules: the Pickering emulsion of step (2) gained is added dropwise in the there-necked flask that the chitosan quaternary ammonium salt solution of 1wt% is housed , and then adjust the pH to 4.0, and react in a water bath at 40° C. for 2 hours under mechanical stirring at 1000 r / min. Finally, powdery clove essential oil / citronella oil-chi...

Embodiment 2

[0058] (1) Disperse 0.08 g of silica nanoparticles in 8 mL of 0.1 wt % N-maleoylated chitosan aqueous solution at pH=6, and then ultrasonically 20 min at 30° C. to obtain silica nanoparticles dispersed Mixture.

[0059] (2) Add 4 mL of eucalyptus oil / tea tree oil (volume ratio 1:3) to the mixed solution of silica nanoparticles dispersed in step (1), and emulsify in a homogenizer at 10,000 rpm for 5 min at 20°C , to get the Pickering emulsion.

[0060] (3) Pickering emulsion method prepares eucalyptus oil / tea tree oil-chitosan-based micro-nanocapsules: the Pickering emulsion of step (2) gained is added dropwise to the there-necked flask that the chitosan quaternary ammonium salt solution of 0.5wt% is housed , then adjust the pH to 5.0, and react in a water bath at 45° C. for 4 hours under mechanical stirring at 800 r / min. Finally, powdery eucalyptus oil / tea tree oil-chitosan-based micro-nanocapsules were obtained through freeze-drying.

[0061] (4) Disperse 3.0 g of chitosan...

Embodiment 3

[0065] (1) Disperse 0.08 g of silica nanoparticles in 8 mL of 0.5 wt % hydroxypropyl chitosan aqueous solution at pH=6.5, and then sonicate at 25° C. for 8 min to obtain a mixed liquid in which silica nanoparticles are dispersed.

[0066] (2) Add 2 mL of peppermint oil / cinnamon oil (volume ratio 1:1) to the mixed solution of silica nanoparticles dispersed in step (1), emulsify in a homogenizer at 8000 rpm for 8 min at 25 °C, Get Pickering Lotion.

[0067] (3) Pickering emulsion method prepares peppermint oil / cinnamon oil-chitosan-based micro-nanocapsules: the Pickering emulsion of step (2) gained is added dropwise to the three-necked flask of the alendronate sodium chitosan solution that 2wt% is housed , then adjust the pH to 6.0, and react in a water bath at 50° C. for 3 hours under mechanical stirring at 1000 r / min. Finally, powdered peppermint oil / cinnamon oil-chitosan-based micro-nanocapsules were obtained through freeze-drying.

[0068] (4) Disperse 5.0 g of chitosan qu...

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Abstract

The invention discloses a bagging composite material for fruits and vegetables, a preparation method therefor and application of the bagging composite material. The composite material comprises the following raw materials in parts by mass: 1-5 parts of film forming matter, 50-90 parts of dispersant, 0.1-2 parts of antibacterial plant essential oil-chitosan based micro-nano capsules, 1-10 parts ofplasticizer, 1-10 parts of nano reinforced particles and 0.5-5 parts of binder. According to the bagging composite material for the fruits and vegetables, the preparation method therefor and the application of the bagging composite material, a safe and efficient emulsifier, plant essential oil with broad bacteriostatic spectrum and high antibacterial property, and chitosan and derivatives thereofare employed, and the bagging composite material for the fruits and vegetables is prepared through effectively constructing long-acting sustained-release micro-nano capsules, i.e., a biological antibacterial agent based on an emulsion template method, and compounding the micro-nano capsules with the chitosan and derivatives thereof and a nano reinforced particle film forming solution; and the obtained composite material can be applied to the fruits and vegetables through a convenient spray coating mode, the slow release of the antibacterial plant essential oil can be achieved, the insect-proofing, antibacterial and freshness-preserving effects of the fruits and vegetables can be effectively improved, and thus, the quality of the fruits and vegetables is improved.

Description

technical field [0001] The invention belongs to the technical field of biomass organic polymer materials, and in particular relates to a fruit and vegetable bagging composite material and its preparation method and application. Background technique [0002] Fruits and vegetables are rich in vitamins, minerals and dietary fiber. They are an important part of people's daily diet and an indispensable food for nutritional supplementation. During the growth of fruits and vegetables, they are easily infested by diseases and insect pests, which affect the appearance and quality of fruits and vegetables. With the improvement of people's living standards, people's requirements for fruits and vegetables turn to high-quality and pollution-free, avoiding the use of stimulating drugs such as pesticides and hormones. Bagging materials can improve the appearance quality of fruits and vegetables and reduce pesticide residues, which is of great significance for improving the quality of frui...

Claims

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Application Information

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IPC IPC(8): A01G13/02A01N25/28A01N43/16A01N65/08A01N65/12A01N65/22A01N65/24A01N65/28A01N65/44A01P1/00A01P3/00A01P7/00A01P21/00
CPCA01G13/0237A01N25/28A01N65/28A01N65/44A01N43/16A01N65/08A01N65/00A01N65/22A01N65/24A01N65/12
Inventor 周闯李普旺杨子明谢江辉张利杨卓鸿蒋刚彪何祖宇王超刘运浩宋书会
Owner SOUTH SUBTROPICAL CROPS RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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