CN108912627A - A kind of degradable controlled release antibiotic food packaging and preparation method - Google Patents

A kind of degradable controlled release antibiotic food packaging and preparation method Download PDF

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Publication number
CN108912627A
CN108912627A CN201810535553.5A CN201810535553A CN108912627A CN 108912627 A CN108912627 A CN 108912627A CN 201810535553 A CN201810535553 A CN 201810535553A CN 108912627 A CN108912627 A CN 108912627A
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Prior art keywords
controlled release
mould proof
preparation
food packaging
release antibiotic
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CN201810535553.5A
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Chinese (zh)
Inventor
杨保强
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Suzhou Sino-Euro Biological Engineering Co Ltd
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Suzhou Sino-Euro Biological Engineering Co Ltd
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Priority to CN201810535553.5A priority Critical patent/CN108912627A/en
Publication of CN108912627A publication Critical patent/CN108912627A/en
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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
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • C08L67/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B65D65/46—Applications of disintegrable, dissolvable or edible materials
    • B65D65/466—Bio- or photodegradable packaging materials
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/90—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in food processing or handling, e.g. food conservation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
    • Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Food Preservation Except Freezing, Refrigeration, And Drying (AREA)

Abstract

The present invention relates to a kind of degradable controlled release antibiotic food packagings and preparation method, are made jointly of mould proof composition and polylactic acid；The degradable controlled release antibiotic food packaging, the content of mould proof mixture are 45-48%, and polylactic acid content is 51%-54%, and there are also 4, the 4'- methyl diphenylene diisocyanate of 0.8%-1.2%, percentage is mass percent.Compared with the existing technology, the present invention realizes following beneficial effect：The growth for inhibiting yeast in food and mould, extends the shelf life；It is anti-oxidant；Ingredient comes from natural extract；It is packaged as biodegradable, can be recycled；Without anaphylactogen, food original local flavor, color etc. are not influenced；Without antibiotic.

Description

A kind of degradable controlled release antibiotic food packaging and preparation method
Technical field
The present invention relates to a kind of degradable controlled release antibiotic food packagings and preparation method.
Background technique
The mould proof ingredient of tradition can only play a role in a short time, but decompose as time goes by and gradually, cannot be permanent It plays a role；Anti-fungal composition antibiotic at present, the abuse of antibiotic will lead to superbacteria generation, to the mankind not enough safety friend It is good.
And conventional plastic is packed, such as polyethylene, materials multi-source is non-renewable in fossil energy, while being difficult in nature Under the conditions of decompose, ecological environment can be adversely affected, be unfavorable for sustainable development.Ingredient of either guaranteeing the quality still is packed, It is all unable to dynamically track and inhibits the mouldy problem of food.
Summary of the invention
In order to overcome drawbacks described above, the present invention provide it is a kind of extend the shelf life, be anti-oxidant, the controlled release antibiotic of degradable recycling Food packaging and preparation method.
Certain humidity is a necessary condition of fungus growth, and during food storing, surface moisture can become Change, if humidity reaches 30-50%, mould starts to grow.And this controlled release system can change according to the variation of foodstuff surface humidity Become the diffusion rate of release antibacterial substance, this diffusion follows model and follows level-one diffusion theory：
V0=m∞K1 (2)
K1Total diffusion constant
V0Initial propagations rate
mtIn t moment, the phenyllactic acid quality that has been discharged from release-controlled film
m∞When reaching balance, the phenyllactic acid quality that has been discharged from release-controlled film
T- moment t.
In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is：A kind of mould proof mixture, described is mould proof Mixture primary raw material and content are as follows：
Wherein, lactobacillus fermentation is made of 45%-55% phenyllactic acid, 25%-35% lactic acid, 20%-25% acetic acid；Hundred Divide than being mass fraction.
Chitosan is mushroom extract, and molecular weight is 1 × 106Da。
A kind of preparation method of mould proof mixture, includes the following steps：
1) fungi Chitosan powder is dissolved in the lactic acid solution of 1% (v/v) (cream with the ratio of 0.56% (g/100ml) Acid solution does not form polylactic acid in this step), it is stirred by blender, temperature 18-22 degree is kept in whipping process, when stirring Between 220-240 minutes；0.56% refers in 100ml lactic acid solution, and fungi chitosan is 0.56g；
2) step 1) obtains chitosan, lactic acid mixed solution carry out centrifugal treating, centrifugal condition 8000- 12000rpm, 28-35min collect supernatant, remove precipitating；
3) the Tween-80 surfactant of 0.22% (v/v) and the glycerol of 0.5% (v/v) is added；0.22% and 0.5% Refer to the percent by volume that mixed liquor is accounted for after mixed liquor is added in surfactant or glycerol, it is the same below.
4) by the 3) mixed solution that step obtains the lactobacillus fermentation of 5-15% (v/v) is added, at a temperature of 18-22 degree Stirring 40-60 minutes.15% refers to the volume ratio for the mixed solution that lactobacillus fermentation (liquid) and third step obtain.
A kind of degradable controlled release antibiotic food packaging, by mould proof mixture, polylactic acid and 4,4'- diphenyl methane two is different Cyanate is made jointly.
The content of the degradable controlled release antibiotic food packaging, mould proof mixture is 45-48%, and polylactic acid content is 51%-54%, there are also 4, the 4'- methyl diphenylene diisocyanate of 0.8%-1.2%, percentage is mass percent.
A kind of preparation method of degradable controlled release antibiotic food packaging, which is characterized in that include the following steps：
The preparation of the mould proof mixture of first step：
1) 0.56% fungi chitosan is dissolved in 1% lactic acid solution.It is stirred using blender, 20 degrees Celsius of temperature, the time 4 Hour；
2) liquid that step 1) obtains carries out centrifugal treating, and 8000-12000rpm is centrifuged 30-35min, collects supernatant, Remove precipitating；
3) glycerol of the Tween-80 surfactant and 0.5-0.55% (v/v) of addition 0.21-0.22% (v/v), hundred Divide than being percent by volume.
4) lactobacillus fermentation of 5-15% is added, is stirred 40-60 minutes under 19-21 degree celsius temperature；
The preparation of second step antimicrobial packaging：
1) mould proof mixture is loaded into extruder, flow 245-255L/min by first entrance；Temperature control is existed 165-175 degrees Celsius；
2) polylactic acid enters extruder by second entrance, and 165-175 degrees Celsius of temperature, flow 245-255L/min；So 4, the 4'- methyl diphenylene diisocyanate that purity is 99%, flow 80cm are added afterwards3/min；Under frictional force effect, each group Branch forms uniform mixture.Each component, that is, all components (mould proof mixture, polylactic acid, two isocyanide of 4,4'- diphenyl methane Acid esters).
Preferably, a kind of preparation method of mould proof mixture, includes the following steps：
1) 0.56% fungi chitosan is dissolved in 1% lactic acid solution, by magnetic stirrer, 20 degrees Celsius of temperature, Time 4 hours, obtain chitosan, lactic acid mixed solution；
2) step 1) obtains chitosan, lactic acid mixed solution carry out centrifugal treating, centrifugal condition 8000- 12000rpm, 30min collect supernatant, remove precipitating；
3) the Tween-80 surfactant of 0.22%v/v and the glycerol of 0.5%v/v is added；
4) 15% lactobacillus fermentation is added, is stirred 40-60 minutes under 20 degree celsius temperatures.
The present invention also provides a kind of degradable controlled release antibiotic food packagings, by mould proof composition, polylactic acid and 4,4'- bis- Methylenebis phenyl isocyanate is made jointly.Polylactic acid (Polylactic Acid), thermoplasticity is good, (such as by regenerated resources The starch extracted in corn, cassava) it ferments, dehydration, obtain after purification, it can be with natural degradation.Phenyllactic acid (Phenyllactic Acid), natural antifungi ingredient, the tunning of Lactobacillus plantarum lactobacillus plantarum.Water-soluble fungi shell Glycan (chitosan), natural mushroom extract have water solubility, and good film-forming property can be wrapped up, be carried and discharge when needed Something.
Preferably, the degradable controlled release antibiotic food packaging, the content of mould proof mixture are 45.5%, polylactic acid Content is 53.6%, and there are also 0.9% 4,4'- methyl diphenylene diisocyanates, and percentage is mass percent.Degradable The action principle of controlled release antibiotic food packaging is：The chitosan particle for carrying phenyllactic acid, is diffused into food from packaging, rises To the bacteriostasis of long duration.It can be by adjusting raw material proportioning, so that particle hydrophily is changed, to control diffusion and release speed Degree.
Preferably, a kind of preparation method of degradable controlled release antibiotic food packaging, includes the following steps：
The preparation of the mould proof mixture of first step：
1) 0.56% fungi chitosan is dissolved in 1% lactic acid solution.It is stirred using magnetic stirrer, 20 degrees Celsius of temperature, Time 4 hours；
2) liquid that step 1) obtains carries out centrifugal treating, and 8000-12000rpm is centrifuged 30min, collects supernatant, removes Precipitating；
3) the Tween-80 surfactant of 0.22%v/v and the glycerol of 0.5%v/v is added；
4) 15% lactobacillus fermentation is added, is stirred 40-60 minutes under 20 degree celsius temperatures；
The preparation of second step antimicrobial packaging：
1) mould proof mixture is loaded into extruder, flow 250L/min by first entrance；Temperature is controlled Celsius 149 Degree；
2) polylactic acid enters extruder by second entrance, and 149 degrees Celsius of temperature, flow 250L/min；Then it is added pure 4, the 4'- methyl diphenylene diisocyanate that degree is 99%, flow 80cm3/min；Similarly, under frictional force effect, each component It will form uniform mixture.
Compared with the existing technology, the present invention realizes following beneficial effect：
1. the selection of material inhibits the growth of yeast in food and mould, extend the shelf life；It is anti-oxidant；Ingredient comes from day Right extract；It is packaged as biodegradable, can be recycled；Without anaphylactogen, food original local flavor, color etc. are not influenced；It is free of Antibiotic.Compared with anti-fungal composition antibiotic used at present, the main component (polylactic acid, chitosan etc.) of antimicrobial packaging is disappearing More safety is friendly in the person of expense mind.It solves the problems, such as that tradition is guaranteed the quality and ingredient and packs the low rate of recovery, meet sustainable development Strategy.
2. Intelligent controlled release.Controlled release theory is based on two facts：1) fungus growth needs the diffusion of certain humidity, 2) phenyllactic acid Using humidity as motive force.Once humidity increases, phenyllactic acid diffusion just be will increase, to press down mycostatic growth.It is controlled by developing / controlled release system is released, solving the mould proof ingredient of tradition can only play a role in a short time, but divide as time goes by and gradually The problem of solving, cannot playing a role for a long time.
Specific embodiment
Below with reference to embodiment, the present invention will be further explained.
Embodiment 1
A kind of preparation method of mould proof mixture, includes the following steps：
1) 0.56% fungi chitosan is dissolved in 1% lactic acid solution, by magnetic stirrer, 20 degree of temperature, and the time 4 Hour, obtain chitosan, lactic acid mixed solution；
2) step 1) obtains chitosan, lactic acid mixed solution carry out centrifugal treating, centrifugal condition 8000- 12000rpm, 30min collect supernatant, remove precipitating；
3) the Tween-80 surfactant of 0.22%v/v and the glycerol of 0.5%v/v is added；
4) 15% lactobacillus fermentation is added, is stirred 40-60 minutes at a temperature of 20 degree.Lactobacillus fermentation is by 45% Phenyllactic acid, 35% lactic acid, 20% acetic acid composition, percentage is mass percent.Lactobacillus fermentation 80%, chitosan 4%, cream Sour 7%, glycerol 6%, Tween-80 surfactant 3%.
Degradable controlled release antibiotic food packaging, the content of mould proof mixture are 45.5%, and polylactic acid content is 53.6%, There are also 0.9% 4,4'- methyl diphenylene diisocyanates, and percentage is mass percent.
A kind of preparation method of degradable controlled release antibiotic food packaging, includes the following steps：
The preparation of the mould proof mixture of first step：
1) 0.56% fungi chitosan is dissolved in 1% lactic acid solution.It is stirred using magnetic stirrer, 20 degree of temperature, the time 4 Hour；
2) liquid that step 1) obtains carries out centrifugal treating, and 8000-12000rpm is centrifuged 30min, collects supernatant, removes Precipitating；
3) the Tween-80 surfactant of 0.22%v/v and the glycerol of 0.5%v/v is added；
4) 15% lactobacillus fermentation is added, is stirred 40-60 minutes at a temperature of 20 degree；
The preparation of second step antimicrobial packaging：
1) mould proof mixture is loaded into extruder, flow 250L/min by first entrance；Temperature is controlled at 149 degree；
2) polylactic acid enters extruder by second entrance, and 149 degree of temperature, flow 250L/min；Then purity, which is added, is 99% 4,4'- methyl diphenylene diisocyanate, flow 80cm3/min；Similarly, under frictional force effect, each component can shape At uniform mixture.
Antimicrobial packaging of the invention is placed 3 months under conditions of the relative humidity of air is 100%, still not mouldy (not having mildew), places 5 months under conditions of relative humidity is 70%, still not mouldy (not having mildew).
The above display describes basic principles and main features and advantage of the invention.The technical staff of the industry should Understand, the present invention is not limited to the above embodiments, what is described in the above embodiment and the description is only saying the principle of the present invention, Without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements are all It drops into the claimed scope of the invention.The scope of the present invention is defined by the appended claims and its equivalents.

Claims (6)

1. a kind of degradable controlled release antibiotic food packaging, by mould proof mixture, polylactic acid and 4, two isocyanide of 4'- diphenyl methane Acid esters is made jointly.
2. the degradable controlled release antibiotic food packaging of one kind described in claim 1, which is characterized in that the mould proof mixture Primary raw material and content it is as follows：
Wherein, lactobacillus fermentation is made of 45%-55% phenyllactic acid, 25%-35% lactic acid, 20%-25% acetic acid；Percentage For mass fraction.
3. degradable controlled release antibiotic food packaging according to claim 2, which is characterized in that chitosan is mushroom extraction Object, molecular weight are 1 × 106Da。
4. the degradable controlled release antibiotic food packaging of one kind according to claim 1, which is characterized in that mould proof mixture Content is 45-48%, and polylactic acid content is 51%-54%, and there are also 4, the 4'- diphenylmethane diisocyanates of 0.8%-1.2% Ester, percentage are mass percent.
5. the preparation method of the degradable controlled release antibiotic food packaging of one kind described in claim 1-4 any one, feature It is, includes the following steps：
The preparation of the mould proof mixture of first step；
The preparation of second step antimicrobial packaging：
1) mould proof mixture is loaded into extruder, flow 245-255L/min by first entrance；Temperature is controlled in 165-175 Degree Celsius；
2) polylactic acid enters extruder by second entrance, and 165-175 degrees Celsius of temperature, flow 245-255L/min；Then plus Enter 4, the 4'- methyl diphenylene diisocyanate that purity is 99%, flow 80cm3/min；Under frictional force effect, each component meeting Form uniform mixture；Each component includes mould proof mixture, polylactic acid, 4,4'- methyl diphenylene diisocyanate.
6. the preparation method of the degradable controlled release antibiotic food packaging of one kind according to claim 5, which is characterized in that the The preparation of the one mould proof mixture of step：
1) 0.56% fungi chitosan is dissolved in 1% lactic acid solution, is stirred using blender, and 20 degrees Celsius of temperature, the time 4 is small When；
2) liquid that step 1) obtains carries out centrifugal treating, and 8000-12000rpm is centrifuged 30-35min, collects supernatant, removes Precipitating；
3) the Tween-80 surfactant of 0.21-0.22% and the glycerol of 0.5-0.55% is added, percentage is volume basis Than；
4) streptococcus acidi lactici fermented solution of 5%-15% is added, is stirred 40-60 minutes under 19-21 degree celsius temperature.
CN201810535553.5A 2018-05-30 2018-05-30 A kind of degradable controlled release antibiotic food packaging and preparation method Pending CN108912627A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040228884A1 (en) * 2003-05-15 2004-11-18 Gupta Shyam K. Ion-pair delivery system for cosmetic and pharmaceutical compositions
CN1923891A (en) * 2006-09-21 2007-03-07 同济大学 Anti-bacterium mildew-proof biodegradable polylactic acid foam plastic and preparation method thereof
CN103707609A (en) * 2013-12-20 2014-04-09 华南理工大学 Temperature-sensitive type gas phase sustained-release preservation composite film of baked food and preparation method thereof
CN107980888A (en) * 2017-12-21 2018-05-04 汪东风 A kind of edible fresh-keeping material and its application in dried marine products shelf life is extended

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040228884A1 (en) * 2003-05-15 2004-11-18 Gupta Shyam K. Ion-pair delivery system for cosmetic and pharmaceutical compositions
CN1923891A (en) * 2006-09-21 2007-03-07 同济大学 Anti-bacterium mildew-proof biodegradable polylactic acid foam plastic and preparation method thereof
CN103707609A (en) * 2013-12-20 2014-04-09 华南理工大学 Temperature-sensitive type gas phase sustained-release preservation composite film of baked food and preparation method thereof
CN107980888A (en) * 2017-12-21 2018-05-04 汪东风 A kind of edible fresh-keeping material and its application in dried marine products shelf life is extended

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