CN106987105B - A kind of degradable antibacterial food packaging material and preparation method thereof - Google Patents
A kind of degradable antibacterial food packaging material and preparation method thereof Download PDFInfo
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- CN106987105B CN106987105B CN201710125257.3A CN201710125257A CN106987105B CN 106987105 B CN106987105 B CN 106987105B CN 201710125257 A CN201710125257 A CN 201710125257A CN 106987105 B CN106987105 B CN 106987105B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/13—Phenols; Phenolates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/10—Esters; Ether-esters
- C08K5/11—Esters; Ether-esters of acyclic polycarboxylic acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/04—Polyesters derived from hydroxy carboxylic acids, e.g. lactones
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/06—Biodegradable
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/16—Applications used for films
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- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
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- Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
Abstract
The present invention relates to packaging material for food fields, more particularly to a kind of degradable antibacterial food packaging material, it is prepared by substrate polylactic acid and auxiliary agent thymol and tributyl citrate using the tape casting technique, in which: the 3%-7% that thymol dosage is the 5%-10% of polylactic acid weight, tributyl citrate dosage is polylactic acid weight.The present invention is for the more rare and environmentally friendly demand of functional packing material in the prior art, a kind of degradable antibacterial food packaging material is provided, the growth of food spoilage can be effectively inhibited, extends the food storage phase, and " white pollution " is solved, reduce the injury to environment.
Description
Technical field
The present invention relates to packaging material for food fields, and in particular to a kind of degradable antibacterial food packaging material and its preparation
Method.
Background technique
Microbial spoilage is a major reason for influencing food spoilage, has data to show, in fruits and vegetables industry, China 1 year
Fruits and vegetables rot to lose 75,000,000,000, account for 30% or more of the entire industry output value.This still has biggish difference compared with international market
, one of them very big reason is exactly bad packing, influences to export, and since packaging function does not reach requirement, be unfavorable for flowing
Lead to consumption and causes loss serious.Packaging material currently on the market, with functional more rare, we are common in supermarket
Common polythene preservative film, play moisturizing, starvation only by simple covering isolation to reduce fruits and vegetables respiration consumption
The effect of sugar can not really play the effect of antibacterial.
Environmental protection and sustainable development are the important strategic objectives in one, China, and traditional packaging material is changed with petroleum etc.
Work Raw material processing is made, and does not have bioactivity, and waste will pass through 200 years just can be degradable, big to environmental injury,
Easily form " white pollution ".Therefore, today prevailing in environmental protection concept, a kind of antibiotic packaging material of environment-friendly type degradable are answered
It transports and gives birth to.
Polylactic acid (polylactic acid, PLA) is a kind of biodegradable material, and foreign countries are early in the 1930s
It has begun to study it, it is with the organic wastes such as the natural plants such as corn, wheat, potato, beet and its lotus, leaf, root
Fermented to be polymerized for raw material, discarded polylactic acid article can be degradable at carbon dioxide and water under field conditions (factors), and
Ecological circulation is reentered, intermediates are also the metabolite of human normal, toxic side effect hidden danger is not present, because
This, is a kind of aliphatic polyester series high molecular material with excellent biocompatibility and degradability, in addition, PLA is in food packet
The application for loading onto face has obtained the approval of U.S. FDA.
Thymol (Thymol), alias thymol, 5- methyl -2- isopropyl-phenol, is a kind of monoterpene phenol, is highly soluble in second
In alcohol, ether, acetic acid, chloroform and benzene.It is primarily present in Labiatae Thymus plant, is Thymus plant volatile oil
Main component has good aroma.It is found in the research to thymol In Vitro Bacteriostatic, thymol is to golden yellow Portugal
Grape coccus, bacillus subtilis, Escherichia coli, proteus, lactobacillus bulgaricus, Streptomyces thermophilus, the abnormal Chinese are inferior
Family name's yeast, saccharomyces cerevisiae, aspergillus niger, aspergillus flavus, 10 kinds of functions on common pollutant bacteria have certain inhibiting effect, minimum inhibitory concentration point
It Wei not 10,20,20,40,40,40,80,40,80,160 μ g/m L.This illustrates that thymol has very wide antimicrobial spectrum.
Tributyl citrate has preferable biodegradability as a kind of novel " green " Environmental-friendplastic plastic plasticizer,
It is non-toxic and tasteless, it is a kind of colorless and transparent high boiling liquid, dissolves each other, do not reacted with plastics with most organic solvents, it is alternative
Phthalate conventional plasticizers.Being added in polymeric system can be such that the plasticity of polymeric system increases, and improve
The mobility of resin in processing and forming, assigns the functional product of product softness.It is widely used in food and medical instrument packet
The fields such as dress, cosmetics, daily necessities, toy, military supplies.
Summary of the invention
For the more rare and environmentally friendly demand of functional packing material in the prior art, the object of the present invention is to provide
A kind of degradable antibacterial food packaging material, solves the problems, such as to bring because of bad packing, to can effectively inhibit food spoilage
Growth, extend the food storage phase, and solve " white pollution ", reduce the injury to environment；Present invention simultaneously provides the materials
Preparation method, this method is simple to operation, so as to realize industrialization.
Goal of the invention to realize the present invention, inventor provide the following technical solutions:
A kind of degradable antibacterial food packaging material, is adopted by substrate polylactic acid and auxiliary agent thymol and tributyl citrate
It is prepared with the tape casting technique, in which: thymol dosage is the 5%-10% of polylactic acid weight, tributyl citrate dosage
For the 3%-7% of polylactic acid weight.
The present invention, as carrier, selects the thymol with extensive antimicrobial spectrum as antibacterial agent, and add using polylactic acid
Add the tributyl citrate with preferable biological degradability as plasticizer, the casting film-forming after solution blending further passes through again
Heat sealing machine heat-sealing obtains packaging bag.Packaging bag surface smoothness of the invention and the transparency are good, and physical mechanical property is good, use
Polylactic acid has the function of complete biodegradable as carrier, small to environmental pressure, in addition, the thymol selected is a kind of
Natural plant essential oils, nontoxic, safety, antimicrobial spectrum are wide.By the fruit and vegetable food that packaging bag of the present invention was packed, in shelf Circulation Period
It is interior, harmful microbe pollution can be reduced, fruits and vegetables dehydration is reduced and wilts, delaying senility can play extension shelf to a certain extent
The effect of phase, increases economic efficiency.
Preferably, a kind of degradable antibacterial food packaging material according to the present invention, wherein described is poly-
Lactic acid uses 8052D type polylactic acid.
Preferably, a kind of degradable antibacterial food packaging material according to the present invention, wherein the stream
Prolong method technique casting film-forming, film with a thickness of 0.040-0.049mm.
The present invention also provides a kind of above-mentioned preparation methods of degradable antibacterial food packaging material, include the following steps:
(1) polylactic acid is dried under vacuum to constant weight；
(2) material obtained in step (1) is dissolved in methylene chloride using solution blended process；
(3) a certain amount of thymol and tributyl citrate are added in the solution that step (2) obtains, thymol is used
Amount is the 5%-10% of polylactic acid weight, the 3%-7% that tributyl citrate dosage is polylactic acid weight, to thymol and lemon
After the dissolution of lemon acid tributyl, it is set to be uniformly dispersed by magnetic stirring apparatus at room temperature；
(4) finely dispersed solution obtained in step (3) is poured into glass mold, is spontaneously dried, then gained is resisted
Mycoderm is transferred in vacuum oven, dry to constant weight.
Preferably, the preparation method of a kind of degradable antibacterial food packaging material according to the present invention,
In, the antibacterial film that the step (4) obtains further seals again through heat sealing machine and obtains packaging bag.
Preferably, the preparation method of a kind of degradable antibacterial food packaging material according to the present invention,
In, antibacterial film in the step (4) with a thickness of 0.040-0.049mm.
Compared with prior art, the beneficial effects of the present invention are:
1. having preferable physical and chemical performance
Novel antibacterial of the present invention packs fully biodegradable, has the features such as tensile strength is high, and the transparency is good, energy
The growth for effectively inhibiting food spoilage, extends the food storage phase.It can play the role of Shelf-life to a certain extent, improve
Economic benefit.
2. having preferable application effect
Experiment shows that packaging of the invention can significantly delay storage period breakdown of fruit, and therefore, this is packaged in fruit anti-corrosion guarantor
In fresh with good application prospect.
Specific embodiment
Below with reference to embodiment, the content of the present invention will be explained in more detail.It should be appreciated that implementation of the invention is not limited to
In the following examples, the accommodation in any form and/or change made to the present invention fall within the scope of the present invention.
In the present invention, if not refering in particular to, all parts, percentage are unit of weight, and all equipment and raw material etc. are equal
It is commercially available or the industry is common.If the method that embodiment uses is technology generally in the art without specializing.
Embodiment 1
A kind of degradable antimicrobial form food pack, constituent component are the 8052D type polylactic acid of 1 parts by weight, 0.07 weight
Measure the thymol of part and the tributyl citrate of 0.05 parts by weight.
The preparation method of the degradable antibacterial food packaging bag, comprising the following steps:
(1) particles of polylactic acid is dried under vacuum to constant weight at 70 DEG C；
(2) particles of polylactic acid is dissolved in by material obtained in the step of weighing 1 parts by weight (1) using solution blended process
In the methylene chloride of 20 parts by weight；
(3) thymol of 0.07 parts by weight and the lemon of 0.05 parts by weight are added in the solution that step (2) obtains
Lemon acid tributyl makes its dispersion by magnetic stirrer at room temperature after thymol and tributyl citrate dissolution
Uniformly；
(4) finely dispersed solution obtained in step (3) is poured into glass mold, is spontaneously dried for 24 hours, then by gained
Antibacterial film is transferred in vacuum oven, is dried at 70 DEG C to constant weight；
(5) again on heat sealing machine, 100 DEG C at a temperature of, by antibacterial film seal at packaging bag.
The present embodiment biodegradable antibacterial food bag material thickness is tested by GB/T6672-2001, tensile property
It is tested by GB/T1040.3-2006.As a result are as follows: food pack is with a thickness of 0.041mm, tensile strength 30.68MPa, fracture
Elongation is 180.63%.
By taking blueberry is packed as an example, the sterilizing bag that the concentration of embodiment 1 is 7% is applied on blueberry, and be stored in 0
Under the conditions of DEG C, it is packaged as compareing with PE, the study found that fruit rots when PE packaging storage 18d, and antibacterial packet of the invention
Transport and store the healthy fruit that hiding 36d is still able to maintain 100%.Illustrate that packaging of the invention can significantly delay storage period breakdown of fruit.
Embodiment 2
A kind of degradable antimicrobial form food pack, constituent component are the 8052D type polylactic acid of 1 parts by weight, 0.05 weight
Measure the thymol of part and the tributyl citrate of 0.07 parts by weight.Preparation method is referring to embodiment 1.
The present embodiment biodegradable antibiotic property food pack material thickness is tested by GB/T6672-2001, draftability
It can be tested by GB/T1040.3-2006.As a result are as follows: food pack breaks with a thickness of 0.049mm, tensile strength 40.61MPa
Splitting elongation is 74.43%.
Through detecting, technical effect in the same manner as in Example 1 can be reached, details are not described herein again.
Embodiment 3
A kind of degradable antimicrobial form food pack, constituent component are 8052D type polylactic acid, 0.1 weight of 1 parts by weight
The thymol of part and the tributyl citrate of 0.03 parts by weight.Preparation method is referring to embodiment 1.
The present embodiment biodegradable antibiotic property food pack material thickness is tested by GB/T6672-2001, draftability
It can be tested by GB/T1040.3-2006.As a result are as follows: food pack breaks with a thickness of 0.040mm, tensile strength 15.24MPa
Splitting elongation is 258.81%.
Through detecting, technical effect in the same manner as in Example 1 can be reached, details are not described herein again.
Claims (1)
1. a kind of degradable antibacterial food packaging material, it is characterised in that by substrate polylactic acid and auxiliary agent thymol and citric acid
Tributyl is prepared, and the degradable antibacterial food packaging material is prepared according to the following steps:
(1) particles of polylactic acid is dried under vacuum to constant weight at 70 DEG C；
(2) particles of polylactic acid is dissolved in 20 weights using solution blended process by material obtained in the step of weighing 1 parts by weight (1)
In the methylene chloride for measuring number；
(3) thymol of 0.07 parts by weight and the citric acid of 0.05 parts by weight are added in the solution that step (2) obtains
Tributyl makes it be uniformly dispersed by magnetic stirrer at room temperature after thymol and tributyl citrate dissolution；
(4) finely dispersed solution obtained in step (3) is poured into glass mold, is spontaneously dried for 24 hours, then by gained antibacterial
Film transfer is dried at 70 DEG C to constant weight into vacuum oven.
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| CN201710125257.3A CN106987105B (en) | 2017-03-03 | 2017-03-03 | A kind of degradable antibacterial food packaging material and preparation method thereof |
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| CN201710125257.3A CN106987105B (en) | 2017-03-03 | 2017-03-03 | A kind of degradable antibacterial food packaging material and preparation method thereof |
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| CN106987105A CN106987105A (en) | 2017-07-28 |
| CN106987105B true CN106987105B (en) | 2019-11-08 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111334014A (en) * | 2020-03-17 | 2020-06-26 | 杭州奥风科技有限公司 | Waterproof flame-retardant biological membrane and preparation process thereof |
| CN113956633B (en) * | 2020-07-21 | 2022-12-09 | 中国农业大学 | Degradable active packaging material based on ginger essential oil and polylactic acid and preparation method thereof |
| CN116041924B (en) * | 2023-01-05 | 2024-06-07 | 宁波航天米瑞科技有限公司 | Antibacterial fresh-keeping foaming material, preparation method thereof and packaging bag made of antibacterial fresh-keeping foaming material |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999029768A1 (en) * | 1997-12-09 | 1999-06-17 | Bayer Aktiengesellschaft | Stabilized molding compounds comprised of biologically degradable materials |
| CN103865276A (en) * | 2014-03-19 | 2014-06-18 | 李孟醒 | Active antibacterial edible package with controlled release function and preparation method thereof |
| CN104262656A (en) * | 2014-09-25 | 2015-01-07 | 昆明理工大学 | Preparation method of mushroom preservative film |
| CN105348614A (en) * | 2015-12-07 | 2016-02-24 | 北京印刷学院 | Controlled release active gas adjustment fresh-keeping packaging material and preparation method thereof |
-
2017
- 2017-03-03 CN CN201710125257.3A patent/CN106987105B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999029768A1 (en) * | 1997-12-09 | 1999-06-17 | Bayer Aktiengesellschaft | Stabilized molding compounds comprised of biologically degradable materials |
| CN103865276A (en) * | 2014-03-19 | 2014-06-18 | 李孟醒 | Active antibacterial edible package with controlled release function and preparation method thereof |
| CN104262656A (en) * | 2014-09-25 | 2015-01-07 | 昆明理工大学 | Preparation method of mushroom preservative film |
| CN105348614A (en) * | 2015-12-07 | 2016-02-24 | 北京印刷学院 | Controlled release active gas adjustment fresh-keeping packaging material and preparation method thereof |
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