Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of copper-doped carbon nano-coated fruit fresh-keeping agent and its preparation method and application

A copper-doped, carbon nanotechnology, applied in the direction of protecting fruits/vegetables with a protective coating, can solve the problems of high moisture absorption, low strength of fresh-keeping coating, poor antibacterial ability, etc., to reduce respiration and moisture. Loss of , the effect of preventing decay

Active Publication Date: 2021-12-17
AGRO PROD PROCESSING RES INST YAAS
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many deficiencies in the single film made directly from konjac gum, such as low strength of fresh-keeping coating, poor antibacterial ability and high moisture absorption, etc. It needs to be treated necessary to improve its performance of fresh-keeping coating

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of copper-doped carbon nano-coated fruit fresh-keeping agent and its preparation method and application
  • A kind of copper-doped carbon nano-coated fruit fresh-keeping agent and its preparation method and application
  • A kind of copper-doped carbon nano-coated fruit fresh-keeping agent and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: Nano-coated fruit fresh-keeping agent is used for citrus fresh-keeping

[0038] 1. Preparation of copper-doped carbon nanomaterials (Cu-CDs): 1.6-2.0gNa 2 [Cu(EDTA)] and 0.1-0.3g ascorbic acid, mixed evenly, placed in a corundum boat with a cover, roasted in a high-temperature tube furnace at 300°C for 2-3h, after the roasting was completed, the black product was ground and dissolved in 100mL deionized water, and ultrasonic 20-30min. Then the black suspension was centrifuged at 15000rpm for 15-20min, and the supernatant was passed through a 0.22μm filter membrane. The filtrate was taken and dried in a vacuum oven at 60° C. for 24 hours to obtain copper-doped carbon nanomaterials.

[0039] 2. Preparation of silver nanoparticles (AgNPs): Add 10-50mL (0.01mol / L) silver nitrate solution to a 25mL round-bottomed flask equipped with magnetons, then add 10-50mL (0.5mol / L) polyvinylpyrrolidone (PVP ), after stirring in an ice-water bath, add 15-50mL (0.01mol / L)...

Embodiment 2

[0056] Embodiment 2: Nano-coated fruit preservative is used for litchi preservation

[0057] 1. Preparation of copper-doped carbon nanomaterials (Cu-CDs): same as Example 1.

[0058] 2. Preparation of nano-silver (AgNPs): same as Example 1.

[0059] 3. Preparation of copper-doped carbon nano-coating preservative (Cu-CDs-TM): same as in Example 1.

[0060] 4. Preparation of antistaling agent (TM) without copper-doped carbon nano-coating: same as in Example 1.

[0061] 5, litchi preservation experiment: with embodiment 1.

[0062] (1) Effect of nano-coating film on sensory indicators of litchi

[0063] The lychees shown in Table 4 were subjected to sensory analysis. By comparing the sensory indicators such as appearance, pulp, color and flavor of lychees, the fresh-keeping effect of the coating film treatment group was better than that of the blank group, and the fresh-keeping effect of the Cu-CDs-TM coating film Good, 7d storage still has food value. Because after the frui...

Embodiment 3

[0074] Embodiment 3: Nano-coated fruit fresh-keeping agent is used for mango fresh-keeping

[0075] 1. Preparation of copper-doped carbon nanomaterials (Cu-CDs): same as Example 1.

[0076] 2. Preparation of nano-silver (AgNPs): same as Example 1.

[0077] 3. Preparation of copper-doped carbon nano-coating preservative (Cu-CDs-TM): same as in Example 1.

[0078] 4. Preparation of antistaling agent (TM) without copper-doped carbon nano-coating: same as in Example 1.

[0079] 5. Mango preservation experiment: with embodiment 1.

[0080] (1) Effect of nano-coating film on sensory indicators of mango

[0081] The mangoes shown in Table 7 were subjected to sensory analysis, the mangoes in the blank group matured quickly, and the mangoes were fully mature on the 8th day, and the flavor decreased significantly on the 12th day, indicating that the pulp water loss was serious, sugar substances were decomposed, and the mangoes were gradually aging; after TM and More than half of the...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a copper-doped carbon nano-coating fruit preservative and a preparation method and application thereof. The copper-doped carbon nano material is used as the main raw material, supplemented by nano-silver, konjac gum, sodium alginate and glycerin. Using a saturated Schiff base planar structure Na 2 [Cu(EDTA)] is a carbon source and a doped metal for doped metal carbon nanomaterials. After thermal decomposition, it is transformed into copper-coordinated copper-doped carbon nanomaterials with a graphite structure. Copper-doped carbon nanomaterials can prevent the transport of film-forming substances, block their respiratory system and electron transport system, thereby effectively killing bacteria; at the same time, the redox effects of Cu(II), Cu(I) and Cu(0) And synergistic bactericidal effect with nano-silver to prevent the occurrence of rot. The film-coated preservative reduces the loss of water inside the fruit, inhibits the gas exchange between the inside of the fruit and the outside, forms a microenvironment with high carbon dioxide concentration and low oxygen inside, reduces the respiration in the body, maintains the metabolic activity of cells, and plays a better role Fruit preservation effect.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a copper-doped carbon nano-coated fruit fresh-keeping agent and its preparation method and application. Background technique [0002] Coating technology is to coat a very thin film on the surface of fruits and vegetables to inhibit the respiration of fruits and vegetables, prevent the water loss of fruits and vegetables, prevent the oxidation of external oxygen and internal components of fruits and vegetables, and improve the ability of fruits and vegetables to resist mechanical damage and The ability to resist the infection of germs, thereby protecting the nutritional content, color, aroma, taste and shape of fruits and vegetables, and extending the shelf life of fruits and vegetables. The success of film preservation mainly depends on the choice of film. Different film materials have different freshness preservation properties, and the same film material m...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): A23B7/16
CPCA23B7/16
Inventor 李宏李晚谊肖丹杨亚玲李智敏田浩侯朝祥普红梅
Owner AGRO PROD PROCESSING RES INST YAAS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com