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A fruit and vegetable bagging composite material and its preparation method and application

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 poor mechanical performance stability of the coating film, single coating film components, and affect the effect, etc., to achieve Improves mechanical strength and stability, high film strength, and maintains long-lasting effectiveness

Active Publication Date: 2022-05-27
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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  • A fruit and vegetable bagging composite material and its preparation method and application
  • A fruit and vegetable bagging composite material and its preparation method and application
  • A fruit and vegetable bagging composite material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Preparation of fruit and vegetable bagging composites

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

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

[0053] (3) Preparation of clove essential oil / citronella oil-chitosan-based micro-nanocapsules by Pickering emulsion method: drop the Pickering emulsion obtained in step (2) into a three-necked flask containing a 1wt% chitosan quaternary ammonium salt solution , and then adjusted to pH=4.0, and reacted in a water bath at 40°C for 2h under mechanical stirring at 1000r / min. Finally, through freeze-drying, powdered clove essential oil / citronella ...

Embodiment 2

[0058] (1) Disperse 0.08 g of silica nanoparticles in 8 mL of a 0.1 wt % N-maleylated chitosan aqueous solution with pH=6, and then sonicate at 30° C. for 20 min to obtain a silica nanoparticle-dispersed solution. mixture.

[0059] (2) 4 mL of eucalyptus oil / tea tree oil (volume ratio of 1:3) was added to the mixed solution of silica nanoparticles dispersed in step (1), and emulsified in a homogenizer at 10000 rpm for 5 min at 20°C , to get Pickering lotion.

[0060] (3) Preparation of eucalyptus oil / tea tree oil-chitosan-based micro-nanocapsules by Pickering emulsion method: drop the Pickering emulsion obtained in step (2) into a three-necked flask containing 0.5wt% chitosan quaternary ammonium salt solution , and then adjusted to pH=5.0, and reacted in a water bath at 45°C for 4h under mechanical stirring at 800r / min. Finally, after freeze-drying, powdered eucalyptus oil / tea tree oil-chitosan-based micro-nano capsules are obtained.

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

Embodiment 3

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

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

[0067] (3) Preparation of peppermint oil / cinnamon oil-chitosan-based micro-nanocapsules by Pickering emulsion method: drop the Pickering emulsion obtained in step (2) into a three-necked flask containing 2wt% alendronate sodium chitosan solution , and then adjusted to pH=6.0, and reacted in a water bath at 50°C for 3h under mechanical stirring at 1000r / min. Finally, after freeze-drying, powdered peppermint oil / cinnamon oil-chitosan-based micro-nano capsules are obtained.

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

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Abstract

The invention discloses a fruit and vegetable bagging composite material and its preparation method and application. The composite material comprises the following raw materials in parts by mass: 1-5 parts of film-forming substances, 50-90 parts of dispersants, and antibacterial plant essential oil- 0.1-2 parts of chitosan-based micro-nano capsules, 1-10 parts of plasticizer, 1-10 parts of nano-reinforced particles, and 0.5-5 parts of binder. The present invention uses safe and efficient emulsifiers, plant essential oils with broad antibacterial spectrum and strong antibacterial properties, chitosan and its derivatives, and effectively constructs long-acting slow-release micro-nano capsule biological antibacterial agents based on the emulsion template method, and micron Nanocapsules, chitosan and its derivatives, and nano-reinforced particle film-forming liquid are used to construct fruit and vegetable bagging composite materials. The obtained composite materials can be applied to fruits and vegetables through a convenient spray coating method, and can realize the protection of antibacterial plant essential oils. Slow release can effectively improve the insect-proof, antibacterial and fresh-keeping effect of fruits and vegetables, thereby improving the quality of fruits and vegetables.

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 a preparation method and application thereof. Background technique [0002] Fruits and vegetables are rich in vitamins, minerals and dietary fiber, which are an important part of people's daily diet and an indispensable food for nutritional supplementation. Fruits and vegetables are easily infested by pests and diseases during the growth process, which affects the appearance and quality of fruits and vegetables. With the improvement of people's living standards, people's requirements for fruits and vegetables have turned to high-quality and pollution-free, avoiding the use of irritating 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 o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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