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A kind of plastic wrap and preparation method thereof

A fresh-keeping film and macromolecular polymer technology, applied in the field of fresh-keeping film and its preparation, can solve the problems of complex preparation of the fresh-keeping film, low biological safety, long preservation period, etc., and achieve convenient industrial production, high biological safety and cost. low effect

Inactive Publication Date: 2020-08-25
夏乃珂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a kind of preservative film and its preparation method, in order to solve the technical problem of complicated preparation of existing preservative film, low timeliness of fresh-keeping and low biological safety, the present invention uses high molecular polymer material as matrix, mixes Mixed visible light responsive photocatalyst catalytic material and chitosan sustained-release material loaded with honeysuckle extract and tangerine peel extract to prepare a fresh-keeping film, which is easy to prepare, and the obtained film has a long antibacterial and fresh-keeping effect and high safety

Method used

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  • A kind of plastic wrap and preparation method thereof
  • A kind of plastic wrap and preparation method thereof
  • A kind of plastic wrap and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Weigh 40g of honeysuckle and 20g of tangerine peel, soak in 70% ethanol solution for 24h, microwave at medium heat for 1min, then reflux at 60°C for 1h, concentrate to 20mL, and obtain a solution containing honeysuckle extract and tangerine peel extract;

[0022] Dissolve quaternary ammonium chitosan in water, preferably quaternary ammonium chitosan with a relative molecular mass of 10,000-200,000 and a deacetylation degree of 80-95%. quaternary ammonium chitosan aqueous solution 50mL, add the above solution containing honeysuckle extract and tangerine peel extract under stirring, keep stirring for 1h, centrifuge at 5000-8000r / min for 15min and dry to obtain chitosan loaded with honeysuckle extract and tangerine peel extract sugar;

[0023] Weigh 95g of polyethylene particles as the polymer base material, 2g of nano-titanium dioxide particles loaded with metal ions Ag as a visible light-responsive photocatalyst catalyst, and 3g of chitosan loaded with honeysuckle extrac...

Embodiment 2

[0025] Weigh 30g honeysuckle and 20g tangerine peel, soak in 60% ethanol solution for 24h, microwave for 2min, then reflux at 60°C for 1.5h, concentrate to 20mL, and obtain a solution containing honeysuckle extract and tangerine peel extract; Prepare the solution containing honeysuckle extract and the solution containing tangerine peel extract by weighing 30g of honeysuckle and soaking in 60% ethanol solution for 24h, microwave for 2min, then reflux at 60°C for 1.5h, and concentrate to 20mL to obtain Solution containing honeysuckle extract; weigh 20g of tangerine peel, soak in 60% ethanol solution for 24h, microwave for 2min, then reflux at 60°C for 1.5h, and concentrate to 20mL to obtain a solution containing tangerine peel extract;

[0026] Choose molecular weight to be 50000, deacetylation degree is that the quaternary ammonium chitosan of 85% is dissolved in water, preparation concentration is 150mL of the quaternary ammonium chitosan aqueous solution of 5wt%, is divided in...

Embodiment 3

[0034]This example is used to investigate the effect of honeysuckle extract and tangerine peel extract loaded with chitosan, or directly added to the plastic wrap, on the fresh-keeping and antibacterial effects.

[0035] The preparation method of the preservative film of the experimental group is as follows: Weigh 35g honeysuckle and 25g tangerine peel, soak in a 60% ethanol solution for 24h, microwave for 1min, then reflux at 70°C for 1h, and concentrate to 20mL to obtain the honeysuckle extract and tangerine peel. The solution of the extract; select molecular mass as 80000, deacetylation degree is 85% quaternary ammonium chitosan 2.5g to be dissolved in 50mL water, be mixed with quaternary ammonium chitosan aqueous solution, add honeysuckle extract and tangerine peel under stirring The solution of the extract was kept stirring for 1h, centrifuged at 4500r / min for 15min and dried to obtain chitosan loaded with honeysuckle extract and tangerine peel extract; 95g of polyethylene...

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Abstract

The invention discloses a fresh-keeping film and a preparation method thereof. The technical scheme is that the fresh-keeping film is prepared from raw materials in parts by mass as follows: 90-99 parts of a polymeric base material, 1-5 parts of visible-light response type photocatalyst and 1-5 parts of chitosan with honeysuckle flower extract and tangerine peel extract supported. The fresh-keeping film has the following advantages: the fresh-keeping film is long in bacteriostatic and fresh-keeping time, and can inhibit breeding of various bacteria and fungi; the fresh-keeping film is particularly applicable to food storage in a refrigerator and has an adaptive long-term fresh keeping function against air movement and sundry bacteria entering due to opening and closing of refrigerator doors; the raw materials for preparing the fresh-keeping film are easily available, high in biosafety, green and healthy; the preparation process is simple, the cost is low, and industrial production is facilitated.

Description

technical field [0001] The invention relates to the technical field of food preservation, in particular to a preservation film and a preparation method thereof. Background technique [0002] With the improvement of people's quality of life and the pursuit of health, the requirements for food storage safety and food preservation are getting higher and higher. Food packaging materials and preservation technology have become research hotspots with high attention. Preservative film is usually made of high molecular polymer materials such as ethylene-vinyl alcohol copolymer, low-density polyethylene or polypropylene. However, during use, it is found that the preservative film of these materials is easy to oxidize with the material to be preserved, or itself It is easy to breed bacteria, mold, etc., resulting in unsatisfactory fresh-keeping effect. In order to further improve the performance of the fresh-keeping film, the method of adding antioxidants and antibacterial agents to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L23/06C08L23/08C08L5/08C08K9/12C08K3/22C08K5/00C08J5/18
CPCC08J5/18C08J2323/06C08J2323/08C08J2323/12C08J2405/08C08K5/0058C08K9/12C08K2003/2241C08K2201/011
Inventor 夏乃珂
Owner 夏乃珂
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