Plant extract-synthesized nano-silver multifunctional degradable food packaging material and preparation method thereof

A plant extract and food packaging technology, which is applied in the field of biomass resource utilization and degradable materials, can solve the problems of plant waste pollution and low utilization rate, solve environmental pollution problems, improve high-value utilization, and avoid Effects of Food Contamination and Waste

Pending Publication Date: 2021-11-09
JIMEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of plant waste pollution, low utilization rate and traditional food packaging film, a safe, non-tox

Method used

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  • Plant extract-synthesized nano-silver multifunctional degradable food packaging material and preparation method thereof
  • Plant extract-synthesized nano-silver multifunctional degradable food packaging material and preparation method thereof
  • Plant extract-synthesized nano-silver multifunctional degradable food packaging material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] S1. Preparation of pitaya peel powder: take fresh pitaya waste, wash and dry, then dry in a blast drying oven at 50°C for 36 hours, use a multifunctional pulverizer to crush the pitaya peel, and sieve to 60 mesh for later use .

[0036] S2. Preparation of pitaya peel extract: 10 g of pitaya peel powder was added to 100 g of absolute ethanol, ultrasonicated for 2 hours, stirred at 50° C. for 12 hours, and the ethanol was removed by rotary steaming to obtain pitaya peel extract.

[0037] S3. Preparation of nano-silver: Dissolve 0.2g pitaya peel extract in 100g ethanol aqueous solution (m ethanol: m water = 1:1), after fully stirring, add 0.03g silver nitrate, ultrasonic 6h, at 50 ℃ , continue to stir for 6h, remove the solvent, and obtain nano silver.

[0038]S4. Preparation of 4% chitosan solution: 4g of chitosan was added to 96g of 2% acetic acid aqueous solution, stirred for 4 hours at 25°C, and then left to stand still for 4 hours to remove air bubbles to obtain a 4%...

Embodiment 2

[0041] S1. Preparation of mango peel powder: take fresh mango peel waste, wash and dry it, then dry it in a blast drying oven at 50°C for 48 hours, use a multifunctional grinder to crush the mango peel, and sieve it to 60 mesh for later use .

[0042] S2. Preparation of mango peel extract: add 10 g of mango peel powder into a mixed solution of 120 g of absolute ethanol and ethyl acetate (m ethanol: m ethyl acetate = 5:1), at 50° C., after microwave treatment for 2 h, spin The solvent was evaporated to obtain mango peel extract.

[0043] S3. Preparation of nano-silver: Dissolve 0.2g of mango peel extract in 50g of water, stir well, add 0.03g of silver nitrate, ultrasonicate for 6h, keep stirring at 50°C for 6h, freeze-dry to remove water, and obtain nano-silver .

[0044] S4. above-mentioned nano-silver is added to 50mL 2% chitosan solution (get 2g chitosan and join in 98g, in 2% acetic acid aqueous solution, under 25 ℃ of conditions, stir 4h, stand still 4h to remove bubble ...

Embodiment 3

[0047] S1. Preparation of grape skin powder: take fresh grape skin waste, wash and dry it, then dry it in a blast drying oven at 50°C for 36 hours, use a multifunctional pulverizer to crush the grape skin, and sieve it to 60 mesh for later use .

[0048] S2. Preparation of grape skin extract: 10 g of grape skin powder was added to 120 g of 50% ethanol aqueous solution, microwaved at 50° C. for 3 h, and the solvent was removed by rotary evaporation to obtain grape skin extract.

[0049] S3. Preparation of nano-silver solution: Dissolve 0.2g of grape skin extract in 100g of water, stir well, add 0.03g of silver nitrate, ultrasonicate for 6h, and keep stirring for 6h at 50°C.

[0050] S4. Heat the above solution to 85°C, add 10g of starch, continue to stir for 6h, take 15g of the mixed solution and pour it into a petri dish (d=100mm), and slowly dry it at 40°C to prepare nano-silver multifunctional starch food packaging Material.

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Abstract

The invention discloses a plant extract-synthesized nano-silver multifunctional degradable food packaging material and a preparation method thereof, belonging to the field of biomass recycling and degradable materials. The method comprises the following steps: firstly, preparing a plant extract; then, subjecting silver nitrate to green reduction under the treatment of a series of methods like ultrasonic treatment by using antioxidant substances such as polyphenol and flavonoid in the plant extract to prepare nano-silver; and finally, blending the nano-silver and a degradable material, conducting full stirring at a certain temperature, enabling the compositional substances to react with each other, conducting uniform tape-casting, and performing drying to form a film, thereby obtaining the multifunctional degradable food packaging material. The preparation process of the nano-silver is green and friendly and has good economic feasibility and biocompatibility; the food packaging material can be completely degraded in nature, is free of pollution, and has the functions of excellent biocompatibility, antibacterial property, oxidation resistance, ultraviolet barrier property and the like.

Description

technical field [0001] The invention relates to a nano-silver multifunctional degradable food packaging material synthesized from plant extracts and a preparation method thereof, belonging to the field of biomass resource utilization and degradable materials. Background technique [0002] The skins, stems or other inedible parts of plants are usually directly incinerated, or discarded after simple treatment, and a small part is used in low-value industries such as composting and feed. Studies have shown that these plant wastes contain a large amount of polysaccharides, polyphenols and flavonoids, which have good antibacterial and anti-oxidation functions. The low utilization rate of these plant wastes not only causes environmental pollution problems, It is a waste of resources. [0003] Foodborne diseases are mainly caused by contaminated food, and food antibacterial research has always been the focus of the food industry. Studies have shown that adding antibacterial subst...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L5/08C08L3/02C08L67/04C08K3/08B22F9/24B22F1/00B82Y30/00
CPCC08J5/18B22F9/24B82Y30/00C08K2201/011C08K2003/0806C08J2305/08C08J2303/02C08J2367/04
Inventor 张玉苍成军刘群
Owner JIMEI UNIV
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