Antibacterial fresh-keeping material containing nano-silver and preparation method of antibacterial fresh-keeping material

A fresh-keeping material, nano-silver technology, applied in other home appliances, sustainable manufacturing/processing, bio-packaging, etc., can solve problems such as inability to apply fresh-keeping plastic bag film products, combustion residues that do not meet the standard requirements, and poor antibacterial effect , to achieve the effect of prolonging the fresh-keeping period of food, no toxic side effects, and long antibacterial time

Active Publication Date: 2020-10-13
ANSON NANO BIOTECH ZHUHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, some fresh-keeping films and fresh-keeping bags containing silver ions in the prior art cannot effectively prevent silver ions from being oxidized, so they will turn dark yellow.
Japan and other countries use glass powder and zirconium phosphate as the carrier of silver to add to the masterbatch to make fresh-keeping bags or plastic wraps, but the combustion residues in them do not meet the standard requirements, and the antibacterial effect is poor, so they cannot be applied to fresh-keeping plastic bag film products middle

Method used

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  • Antibacterial fresh-keeping material containing nano-silver and preparation method of antibacterial fresh-keeping material

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Embodiment 1 A kind of antibacterial fresh-keeping material containing nano-silver

[0034] The antibacterial and fresh-keeping material containing nano-silver is composed of the following components and parts by weight: 80 parts of polyethylene, 20 parts of dispersant, 5 parts of binder, and 3 parts of composite nano-silver powder.

[0035] The preparation steps of described composite nano-silver powder are as follows:

[0036] S1. Take the rice straw, clean it, chop it into short stems with a length of 2 cm, dry it at 60° C., crush it, and pass it through a 60-mesh sieve;

[0037] S2. Soak the dried rice straw obtained in step S1 in a sodium hydroxide solution with a mass fraction of 15% at room temperature at a weight ratio of 1:5, wash and dry after 24 hours; then at 100°C, Treat with 2% sodium hydroxide and 15% sodium chlorite solution in a weight ratio of 1:3 for 3 hours, wash and dry after cooling to obtain rice straw fiber powder;

[0038]S3. Add the rice stra...

Embodiment 2

[0048] Embodiment 2 A kind of antibacterial and fresh-keeping material containing nano-silver

[0049] The antibacterial and fresh-keeping material containing nano-silver is composed of the following components and parts by weight: 90 parts of polyethylene, 25 parts of dispersant, 8 parts of binder, and 6 parts of composite nano-silver powder.

[0050] The preparation steps of described composite nano-silver powder are as follows:

[0051] S1. Take the rice straw, clean it, chop it into short stems with a length of 3 cm, dry it at 70° C., crush it, and pass it through a 60-mesh sieve;

[0052] S2. Soak the dried rice straw obtained in step S1 in a sodium hydroxide solution with a mass fraction of 15% at room temperature at a weight ratio of 1:8, wash and dry after 24 hours; then at 100°C, Treat with 2% sodium hydroxide and 15% sodium chlorite solution for 3 hours in a weight ratio of 1:5, wash and dry after cooling to obtain rice straw fiber powder;

[0053] S3. Add the rice...

Embodiment 3

[0063] Embodiment 3 A kind of antibacterial fresh-keeping material containing nano-silver

[0064] The antibacterial and fresh-keeping material containing nano-silver is composed of the following components and parts by weight: 100 parts of polyethylene, 30 parts of dispersant, 12 parts of hydroxymethyl cellulose, and 10 parts of composite nano-silver powder.

[0065] The preparation steps of described composite nano-silver powder are as follows:

[0066] S1. Take the rice straw, clean it, chop it into short stems with a length of 4 cm, dry it at 80° C., crush it, and pass it through a 60-mesh sieve;

[0067] S2. Soak the dried rice straw obtained in step S1 in a sodium hydroxide solution with a mass fraction of 15% at room temperature at a weight ratio of 1:12, wash and dry after 24 hours; then at 100°C, Treating with 2% sodium hydroxide and 15% sodium chlorite solution in a weight ratio of 1:6 for 3 hours, cooling, washing and drying to obtain rice straw fiber powder;

[0...

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Abstract

The invention belongs to the technical field of preparation of fresh-keeping materials, and particularly relates to an antibacterial fresh-keeping material containing nano-silver and a preparation method of the antibacterial fresh-keeping material. The nano-silver-containing fresh-keeping material provided by the invention comprises the following components in parts by weight: 80-100 parts of polyethylene, 20-30 parts of a dispersing agent, 5-12 parts of an adhesive and 3-10 parts of composite nano-silver powder. The antibacterial fresh-keeping film or fresh-keeping bag containing nano-silver,provided by the invention, can efficiently inhibit the growth of various pathogenic microorganisms in a broad-spectrum manner, is excellent in sterilization and mildew resistance, effectively prevents the loss, oxidation, decay or degradation of moisture or oil of fresh foods, prolongs the shelf life, and improves the quality guarantee effect.

Description

technical field [0001] The invention belongs to the technical field of fresh-keeping material preparation, and in particular relates to an antibacterial fresh-keeping material containing nano-silver and a preparation method thereof. Background technique [0002] Fresh-keeping film and fresh-keeping bags are mainly used in microwave food heating, refrigerator food preservation, fresh and cooked food packaging, etc., which can effectively prevent the pollution of food and dust in the air, prevent the entry of bacteria, and then play a role in keeping fresh. There are many kinds of fresh-keeping films and fresh-keeping bags on the market, but these can only play the role of temporarily preventing bacteria from entering, and cannot play the role of antibacterial and bactericidal. Over time, the food will rot and deteriorate. Some PVC cling films mainly used for outer packaging contain di(2-ethylhexyl) adipate (DEHA) plasticizer, which is not allowed by the relevant national sta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L29/04C08L5/04C08L71/02C08L33/02C08K9/12C08K3/08C08K5/42C08J5/18B29D22/00
CPCC08J5/18B29D22/003C08J2323/06C08J2429/04C08J2405/04C08J2471/02C08J2433/02C08K2201/011C08K2003/0806C08K9/12C08K5/42Y02W90/10
Inventor 史廷龙周家发
Owner ANSON NANO BIOTECH ZHUHAI
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