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Bacteriostatic biodegradable plastic film and preparation method thereof

A biodegradable, plastic film technology, applied in the field of antibacterial biodegradable plastic film and its preparation, can solve the problems of easy growth and adhesion of bacteria in the film, reduce the cost of degradable film materials, prevent the large-scale application of biodegradable plastics, etc. Excellent broad-spectrum long-acting antibacterial and migration resistance, solving bacterial growth and adhesion problems, good social environment and economic benefits

Pending Publication Date: 2022-01-21
浙江通力新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The currently developed biodegradable plastics include polybutylene adipate / terephthalate (PBAT), polybutylene succinate-adipate (PBSA) and polybutylene succinate (PBS), etc. , these materials have been proven to be completely degradable into carbon dioxide and water, but the main disadvantage of this type of material is the high cost, which is more than three times the price of traditional PE and PP materials, which prevents the large-scale application of biodegradable plastics
[0004] Starch is the most abundant natural polymer material in plants. It is renewable, easy to degrade, and easy to obtain at a favorable price. Combining starch with biodegradable plastics to prepare film materials can still be completely biodegradable and harmless to the environment. Not only can it reduce the amount of degradable plastics used, thereby reducing the cost of degraded film materials, but the degradation of starch into the soil can also enrich the soil and play an active role in agricultural production. However, starch has poor plasticity and poor dispersion. At the same time, starch and degradation Films made of plastic are easy to breed and adhere to bacteria, which will be a problem for starch-filled degradable plastic films

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A preparation method of antibacterial biodegradable film comprises the following steps:

[0026] (1) Take 25ml of ethyl orthosilicate and add it to 45ml of absolute ethanol, then add 1ml of concentrated hydrochloric acid and 1.5ml of deionized water, condense and reflux, and react with magnetic stirring in a water bath at 90°C for 5 hours to obtain a transparent and uniform solution, named HTEOS. Add 1.5g of triclosan to the above HTEOS, then add 1.5g of γ-aminopropyltriethoxysilane, add 5ml of ammonia water dropwise under strong magnetic stirring, and let stand for 20min after the addition , to obtain a gel with certain elasticity, the gel was dried in an oven at 75°C for 72 hours, ground and sieved to obtain modified triclosan, named GTCS.

[0027] (2) 51.8 parts of polyadipate / butylene terephthalate, 35 parts of cornstarch, 10 parts of glycerin, 3 parts of modified triclosan and 0.2 part of oleic acid amide were stirred evenly in a high-speed mixer to obtain For the...

Embodiment 2

[0031] A method for preparing an antibacterial biodegradable film comprises the following steps:

[0032] (1) Take 25ml of ethyl orthosilicate and add it to 45ml of absolute ethanol, then add 1ml of concentrated hydrochloric acid and 1.5ml of deionized water, condense and reflux, and react with magnetic stirring in a water bath at 90°C for 5 hours to obtain a transparent and uniform solution, named HTEOS. Add 1.5g of triclosan to the above HTEOS, then add 1.5g of γ-aminopropyltriethoxysilane, add 5ml of ammonia water dropwise under strong magnetic stirring, and let stand for 20min after the addition , to obtain a gel with certain elasticity, the gel was dried in an oven at 75°C for 72 hours, ground and sieved to obtain modified triclosan, named GTCS.

[0033] (2) Stir 67.7 parts of polybutylene succinate-adipate, 25 parts of tapioca starch, 5 parts of glycerin, 2 parts of modified triclosan and 0.3 part of oleic acid amide in a high-speed mixer to obtain the prepared For mixi...

Embodiment 3

[0037] A preparation method of antibacterial biodegradable film comprises the following steps:

[0038] (1) Take 25ml of ethyl orthosilicate and add it to 45ml of absolute ethanol, then add 1ml of concentrated hydrochloric acid and 1.5ml of deionized water, condense and reflux, and react with magnetic stirring in a water bath at 90°C for 5 hours to obtain a transparent and uniform solution, named HTEOS. Add 1.5g of triclosan to the above HTEOS, then add 1.5g of γ-aminopropyltriethoxysilane, add 5ml of ammonia water dropwise under strong magnetic stirring, and let stand for 20min after the addition , to obtain a gel with certain elasticity, the gel was dried in an oven at 75°C for 72 hours, ground and sieved to obtain modified triclosan, named GTCS.

[0039] (2) Stir 80.4 parts of polybutylene adipate / terephthalate, 15 parts of corn starch, 3 parts of glycerin, 1.5 parts of modified triclosan and 0.1 part of oleic acid amide in a high-speed mixer to obtain For the premix, the ...

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PUM

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Abstract

The invention discloses a bacteriostatic biodegradable plastic film and a preparation method thereof, and belongs to the technical field of biodegradable films. The bacteriostatic biodegradable plastic film comprises the following raw materials: degradable plastic, starch, glycerol, modified triclosan and oleamide; the preparation method of the antibacterial biodegradable plastic film comprises the following steps: (1) uniformly mixing degradable plastic, starch, glycerol, modified triclosan and oleamide with different contents to obtain a premix; (2) mixing, melting, extruding and granulating the premix to obtain biodegradable antibacterial plastic particles; (3) preparing the biodegradable antibacterial plastic particles into an antibacterial and biodegradable plastic film through a blow molding process, and modifying triclosan by using tetraethoxysilane and an alkaline amino coupling agent, so the bactericidal property and migration resistance of triclosan are improved, the dispersion of starch in the degradable plastic is facilitated, and the mechanical and antibacterial properties of the film are optimized.

Description

technical field [0001] The invention relates to the technical field of biodegradable films, in particular to a bacteriostatic biodegradable plastic film and a preparation method thereof. Background technique [0002] Nowadays, the plastic film used by people is made of polyethylene and polypropylene materials. After the plastic film made of this material is discarded after use, it will continue to exist in the form of plastic in the natural environment, which will pollute and damage the environment. However, films made of biodegradable plastics can be discarded in the environment after use, and can be completely degraded into small molecules such as carbon dioxide and water in 3-6 months under composting conditions, which are very friendly to the environment. Biodegradable films are now being developed Substitution of polyethylene and polypropylene film materials is an effective way to control film fouling. [0003] The currently developed biodegradable plastics include pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L3/02C08K9/06C08K5/136C08J5/18
CPCC08J5/18C08J2367/02C08J2403/02C08K9/06C08K5/136
Inventor 王相友何清洋刘振中蒋水明俞威龙王勇军
Owner 浙江通力新材料科技股份有限公司
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