CN109422983A - starch/PVA composite antibacterial preservative film and preparation method thereof - Google Patents

starch/PVA composite antibacterial preservative film and preparation method thereof Download PDF

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Publication number
CN109422983A
CN109422983A CN201710740388.2A CN201710740388A CN109422983A CN 109422983 A CN109422983 A CN 109422983A CN 201710740388 A CN201710740388 A CN 201710740388A CN 109422983 A CN109422983 A CN 109422983A
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China
Prior art keywords
starch
preservative film
composite antibacterial
pva composite
film
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CN201710740388.2A
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Chinese (zh)
Inventor
周向阳
徐梓轩
周丝雨
丁姣
柳建良
丘苑新
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Zhongkai University of Agriculture and Engineering
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Zhongkai University of Agriculture and Engineering
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Priority to CN201710740388.2A priority Critical patent/CN109422983A/en
Publication of CN109422983A publication Critical patent/CN109422983A/en
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    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18Manufacture of films or sheets
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L29/00Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers
    • C08L29/02Homopolymers or copolymers of unsaturated alcohols
    • C08L29/04Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00Applications
    • C08L2203/16Applications used for films
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00Polymer mixtures characterised by other features
    • C08L2205/02Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00Polymer mixtures characterised by other features
    • C08L2205/03Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

The invention discloses a starch/PVA composite antibacterial preservative film and a preparation method thereof. The preservative film is formed by adding a cross-linking agent, a plasticizer, a defoaming agent and a film-forming assistant into a framework structure formed by starch, cationic starch and polyvinyl alcohol. The preparation method comprises the following steps: preparing starch and cationic starch into a water solution with a certain concentration, heating and gelatinizing, adding polyvinyl alcohol, heating and stirring until the polyvinyl alcohol is completely dissolved; adding a cross-linking agent, heating, stirring and reacting for a certain time; adding plasticizer, defoaming agent and film-forming adjuvant to prepare uniform aqueous solution (glue) whose solid content is 15-25%; and pouring the uniformly mixed aqueous solution (glue) into a mold for molding, and drying to form a film. The antibacterial preservative film has high barrier property to oxygen, nitrogen and carbon dioxide, moderate water vapor transmission capacity and certain sterilization capacity; the antibacterial group is connected on the macromolecular skeleton, so that the performance is more stable, the volatilization is difficult, and the service life is long.

Description

A kind of starch/PVA composite antibacterial preservative film and preparation method thereof
Technical field
The invention belongs to food material fields, and in particular to a kind of starch/PVA composite antibacterial preservative film and its preparation side Method.
Background technique
Fresh fruit of vegetables, meat product contain sufficient moisture and nutritional ingredient, therefore are the ideal breeding bases of microorganism; Existing fresh fruit of vegetables, meat product use antibacterial agent to inhibit the mass propagation of microorganism mostly, but are easy absorption and remain in fruit Vegetable, meat product surface, influence food safety.
Polyvinyl alcohol is a kind of biodegradable synthesis type high molecular material, has many excellent performances, such as water-soluble Property, film forming, ability is penetrated to the barrier property of the gases such as oxygen, carbon dioxide and ethylene and higher steam.Starch is a kind of Renewable biodegradable natural macromolecular material, it is from a wealth of sources, it is renewable, it is cheap.Starch/PVA film is used for fruits and vegetables It is fresh-keeping, safe and non-toxic, complete biodegradable, completely it is water-soluble, have strong barrier property to oxygen, carbon dioxide, ethylene etc., moreover it is possible to protect The features such as holding aqueous vapor penetration appropriate;But it has the following problems: 1, without anti-microbial property, relies primarily on and adjust fresh-keeping object environment Atmosphere reaches fresh-keeping effect, and only obvious to strong breathing preserving fruit and vegetable utilizing effect, application range is restricted;2, hydrophilic dampness, film surface Microorganism easy to breed influences preserving fruit and vegetable utilizing effect.
Summary of the invention
To solve the shortcomings and deficiencies of the prior art, the primary purpose of the present invention is that provide a kind of starch/PVA multiple Close antimicrobial preservative film.The present invention use from the natural plants such as citrus, hawthorn, apple and grape organic acid as starch, The reagent of cationic starch, PVA co-crosslinking is implanted into antibacterial group (quaternary ammonium salt) on starch/PVA film, widens preservative film application Space;Antibacterial group is fixed on starch/PVA film by chemical bond, avoids the loss of antibacterial group, and it is relatively permanent to be able to maintain Antibacterial activity, on the other hand food will not be polluted, use is safer;Unreacted organic acid is starch, PVA Plasticizer, defoaming agent, coalescing agent direct formation of film at surface, high production efficiency can be added without processing after cross-linking reaction in good plasticizer; Water resistance improves, and reduces film surface microbial growth, improves preserving fruit and vegetable utilizing effect.
Another object of the present invention is to provide above-mentioned starch/PVA composite antibacterial preservative film preparation methods.
For achieving the above object, the present invention adopts the following technical scheme:
A kind of starch/PVA composite antibacterial preservative film, with being total to for starch, polyvinyl alcohol and starch, polyvinyl alcohol and crosslinking agent Cross-linking products are basic framework, and plasticizer, defoaming agent and coalescing agent is added and is made;According to parts by weight, original is mainly prepared Material matches
The polyvinyl alcohol is the polyvinyl alcohol that alcoholysis degree is less than or equal to 88%, and specific is preferably polyvinyl alcohol 1788, polyvinyl alcohol 0588 or polyvinyl alcohol 0580.
The starch is at least one of cornstarch, sweet potato starch and pawpaw starch etc..
The cationic starch is at least one of starch tertiary amino alkyl ether, quaternary alkyl ammonium starch ether.
The crosslinking agent is from the organic acid of the natural plants such as citrus, hawthorn, apple and grape, specially 2- hydroxyl fourth At least one of diacid (malic acid), 2,3 dihydroxybutanedioic acid (tartaric acid) and pteroylglutamic acid (folic acid) etc..
The plasticizer is polyhydroxy plasticizer, preferably ethylene glycol, glycerine, polyethylene glycol-400, polyethylene glycol- 1000, at least one of Polyethylene glycol-2000, polyethylene glycol-6000 and sorbierite.
The defoaming agent is glycerin monostearate or phosphoric acid ester.
The coalescing agent is at least one of tackifier, levelling agent and release agent etc..The tackifier are disproportionation pine At least one of perfume, hydrogenated rosin, terpene resin, xanthan gum and cation guar gum;The levelling agent is modified poly- silicon oxygen At least one of alkane, acrylate;At least one of the release agent dimethicone, silicone emulsion.
Above-mentioned starch/PVA composite antibacterial preservative film preparation method, comprising the following steps:
(1) starch, cationic starch are made into certain density aqueous solution Heat Gelatinization, polyvinyl alcohol heating stirring is added To being completely dissolved;
(2) crosslinking agent is added into the solution that step (1) obtains and is stirred to react certain time, obtain uniform mixed solution Or colloidal sol (the small degree of cross linking is solution, is colloidal sol when larger);
(3) plasticizer, defoaming agent, coalescing agent, high-speed stirring are added into the mixed solution or colloidal sol that step (2) obtains It mixes, it is cooling, it is configured to homogeneous aqueous solution or colloidal sol that solid content is 15-25%;
(4) aqueous solution made from step (3) or colloidal sol are poured into die for molding, drying and forming-film.
Step (1) the Heat Gelatinization temperature is 60-75 DEG C, and heating stirring, which refers to, is heated to 80-90 DEG C with 1500~2500 Turn/min speed stirs to being completely dissolved;Step (2) mixing speed is 500 turns/min, and reaction time 30-90min is obtained The solid content of homogeneous solution or colloidal sol is 15-25%;Step (3) is cooled to after mixing evenly with 1500~3500 turns/min speed 40-50℃。
Step (1) the Heat Gelatinization temperature is that 60-75 DEG C of starch makes to be gelatinized completely, and heating stirring, which refers to, is heated to 80-90 DEG C be completely dissolved polyvinyl alcohol with the stirring of 1500~2500 turns/min speed, guarantee step (2) cross-linking reaction and step (2) at The smooth efficient implementation of membrane process.
The control of step (2) cross-linking reaction temperature is advisable at 70-90 DEG C, is lower than 70 DEG C, it is relatively low to eventually lead to the degree of cross linking;It is higher than 90 DEG C, obtained solution (glue) can not sprawl film forming because of poor fluidity;The stirring 30-90min is cross-linking reaction time, low In 30min, cross-linking reaction is not yet complete, and the degree of cross linking is lower;Higher than 90min, the degree of cross linking is excessively high, and the solution (glue) of formation may be because Poor fluidity can not sprawl film forming.
Step (3) solution or colloidal sol solid content must be controlled in 15%-25%, and too high solution (glue) viscosity is big, it is difficult to it sprawls, Solid content too low filming low efficiency.
The temperature of step (4) described drying and forming-film is 110-150 DEG C.
Cationic starch adds 0.5-1 parts by weight in the above process, and too low antibacterial effect is unobvious, excessively high increase cost, The introducing of excess antimicrobial agent also can bring side effect to food hygiene and safety;The crosslinking agent adds 0.5-3 parts by weight, is lower than 0.5 part, cross-linking reaction can not occur;Higher than 3 parts, no longer has a significant effect to the degree of cross linking, will increase cost on the contrary.
Compared with prior art, the present invention has the following advantages and beneficial effects:
(1) the present invention relates to raw material it is biodegradable, crosslinking agent used be natural plants in extract it is natural Acid finally will be degraded to carbon dioxide and water in natural environment, be a kind of environmentally protective preservative film;
(2) it is fixed compared to compound, coating, coordination, antibacterial group is connected on macromolecular scaffold, and performance is more stable, no Food hygiene and safety can be endangered because of the volatilization migration stain food of antibacterial agent.
(3) good controlled atmosphere function is kept, while possessing certain sterilizing ability, has widened that starch/PVA film is fresh-keeping to answer Use space;
(4) introducing of antibacterial group slow down because film it is hydrophilic caused by bacteria breed, the safety for further increasing preservative film defends Natural disposition;
(5) crosslinking agent is the organic acid from the Nature, while being also the plasticizer of polyvinyl alcohol and starch, after being not necessarily to Processing;Starch, PVA crosslinking are completed while introducing antibacterial group, are improved the compatibility between starch, PVA, are improved the physical machine of film Tool performance.Film producing industry is environmentally protective, is simple and efficient, and is easy industrialization.
Detailed description of the invention
Fig. 1 is 3 days example photos of the fresh-keeping chicken of starch of the present invention/PVA composite antibacterial preservative film, and wherein a is fresh-keeping preceding new Freshly-slaughtered poultry meat piece, b are the chicken block after storing 3 days;
Fig. 2 is 3 days example photos of the fresh-keeping chicken of PE preservative film, and wherein a is fresh-keeping preceding fresh chicken block, after b is storage 3 days Chicken block.
Specific embodiment
Below with reference to embodiment and attached drawing, the present invention is described in further detail, but embodiments of the present invention are unlimited In this.
Embodiment 1
Specific formula:
Preparation process is as follows:
(1) each component is weighed up according to formula metering, 30g cornstarch, 1g cationic starch is configured to a certain concentration water It is dissolved in the gelatinization of 75 DEG C of heating water baths, polyvinyl alcohol is added and continues heating stirring to being completely dissolved;
(2) 1.5g folic acid reaction 30min is added toward the solution that step (1) obtains;
(3) coalescing agent and deionized water is added toward step (2) and is heated to being completely dissolved, defoaming agent is then added at a high speed It is dispersed with stirring, is cooled to 50 DEG C, obtains mixed aqueous solution.
(4) uniformly mixed aqueous solution is equably laid on dry, clean mold, formation thickness is uniform, surface Bright and clean smooth liquid layer, dries 12h at 110 DEG C.
No. 1 sealed package Fresh-cut Apples of antimicrobial preservative film prepared with the embodiment, in 25 DEG C/relative humidity RH75% item It is stored 3 days under part, Fresh-cut Apples are without obvious oxidative phenomena, without special bad smell, without obvious corruption;PE preservative film is in phase With under conditions of, Fresh-cut Apples darken, and can smell alcohol smell.
Embodiment 2
Specific formula:
Preparation process is as follows:
(1) each component is weighed up according to formula metering, 20g cornstarch, 0.5g cationic starch is configured to a certain concentration It is water-soluble to be gelatinized in 75 DEG C of heating water baths, it adds polyvinyl alcohol and continues heating stirring to being completely dissolved;
(2) 1.5g folic acid reaction 30min is added toward the solution that step (1) obtains;
(3) coalescing agent and deionized water is added toward step (2) and is heated to being completely dissolved, defoaming agent is then added at a high speed It is dispersed with stirring, is cooled to 50 DEG C, obtains mixed aqueous solution.
(4) uniformly mixed aqueous solution is equably laid on dry, clean mold, formation thickness is uniform, surface Bright and clean smooth liquid layer, dries 12h at 120 DEG C.
Antibacterial film sealed package cabbage heart is prepared using the embodiment, stores two under the conditions of 5 DEG C/relative humidity RH75% In week, cabbage heart appearance is without significant change;At identical conditions, cabbage heart turns yellow PE preservative film, the sign that rots occurs.
Embodiment 3
Specific formula:
Preparation process is as follows:
(1) each component is weighed up according to formula metering, 40g cornstarch, 0.8g cationic starch is configured to a certain concentration It is water-soluble to be gelatinized in 75 DEG C of heating water baths, it adds polyvinyl alcohol and continues heating stirring to being completely dissolved;
(2) 1.5g folic acid reaction 45min is added toward the solution that step (1) obtains;
(3) coalescing agent and deionized water is added toward step (2) and is heated to being completely dissolved, defoaming agent is then added at a high speed It is dispersed with stirring, is cooled to 50 DEG C, obtains mixed aqueous solution;
(4) uniformly mixed aqueous solution is equably laid on dry, clean mold, formation thickness is uniform, surface Bright and clean smooth liquid layer, dries 12h at 120 DEG C.
The fresh peanut of antibacterial film sealed package prepared using the embodiment, under the conditions of 20 DEG C/relative humidity RH60% It stores 10 days, without significantly different before peanut surface dry, with 10 days;At identical conditions, peanut surface goes out PE preservative film Now obvious mildew.
Embodiment 4
Specific formula:
Preparation process is as follows:
(1) each component is weighed up according to formula metering, 20g cornstarch, 1g self-control cationic starch is configured to certain dense Spend it is water-soluble be gelatinized in 75 DEG C of heating water baths, add polyvinyl alcohol and continue heating stirring to being completely dissolved;
(2) 1.5g folic acid reaction 60min is added toward the solution that step (1) obtains;
(3) coalescing agent and deionized water is added toward step (2) and is heated to being completely dissolved, defoaming agent is then added at a high speed It is dispersed with stirring, is cooled to 50 DEG C, obtains mixed aqueous solution;
(4) uniformly mixed aqueous solution is equably laid on dry, clean mold, formation thickness is uniform, surface Bright and clean smooth liquid layer, dries 12h at 120 DEG C.
The fresh chicken block of antibacterial film sealed package prepared using the embodiment, under the conditions of 5 DEG C/relative humidity RH75% Storage 3 days, film is interior without bad smell, and chicken block is not corrupt.Under identical environment, PE film sealed package chicken block, chicken block are used It darkens, there is a large amount of mucus in film, there is bad smell, corruption is serious.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment Limitation, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention, It should be equivalent substitute mode, be included within the scope of the present invention.

Claims (10)

1. a kind of starch/PVA composite antibacterial preservative film, which is characterized in that it prepares raw material and includes:
2. starch according to claim 1/PVA composite antibacterial preservative film, which is characterized in that the polyvinyl alcohol is alcoholysis Degree is less than or equal to 88% polyvinyl alcohol.
3. starch according to claim 1/PVA composite antibacterial preservative film, which is characterized in that the starch is corn shallow lake At least one of powder, sweet potato starch and pawpaw starch.
4. starch according to claim 1/PVA composite antibacterial preservative film, which is characterized in that the cationic starch is to form sediment At least one of powder tertiary amino alkyl ether, quaternary alkyl ammonium starch ether.
5. starch according to claim 1/PVA composite antibacterial preservative film, which is characterized in that the crosslinking agent is 2- hydroxyl At least one of succinic acid, 2,3 dihydroxybutanedioic acid and pteroylglutamic acid.
6. starch according to claim 1/PVA composite antibacterial preservative film, which is characterized in that the plasticizer is polyhydroxy Plasticizer, the coalescing agent are at least one of tackifier, levelling agent and release agent.
7. starch according to claim 6/PVA composite antibacterial preservative film, which is characterized in that the plasticizer is second two In alcohol, glycerine, polyethylene glycol-400, polyethylene glycol-1000, Polyethylene glycol-2000, polyethylene glycol-6000 and sorbierite It is at least one;The tackifier be disproportionated rosin, hydrogenated rosin, terpene resin, xanthan gum and cation guar gum at least It is a kind of;The levelling agent is at least one of modified polyorganosiloxane, acrylate;The release agent dimethicone, emulsification At least one of silicone oil.
8. starch according to claim 1/PVA composite antibacterial preservative film, which is characterized in that the defoaming agent is single stearic Acid glyceride or phosphoric acid ester.
9. the described in any item starch of claim 1 to 8/PVA composite antibacterial preservative film preparation method, which is characterized in that packet Include following steps:
(1) starch, cationic starch are made into certain density aqueous solution Heat Gelatinization, polyvinyl alcohol heating stirring is added to complete Fully dissolved;
(2) crosslinking agent is added into the solution that step (1) obtains and is stirred to react certain time, obtain solution or colloidal sol;
(3) plasticizer, defoaming agent, coalescing agent are added into the solution or colloidal sol that step (2) obtains, high-speed stirred is cooling, matches The homogeneous aqueous solution or colloidal sol that solid content is 15-25% is made;
(4) aqueous solution made from step (3) or colloidal sol are poured into die for molding, drying and forming-film.
10. starch according to claim 9/PVA composite antibacterial preservative film preparation method, which is characterized in that step (1) The Heat Gelatinization temperature be 60-75 DEG C, heating stirring refer to be heated to 80-90 DEG C with 1500~2500 turns/min speed stir to It is completely dissolved;Step (2) mixing speed is 500 turns/min, reaction time 30-90min, and obtained solution or consolidating for colloidal sol contain Amount is 15-25%;Step (3) is cooled to 40-50 DEG C with 1500~3500 turns/min speed after mixing evenly.
CN201710740388.2A 2017-08-25 2017-08-25 starch/PVA composite antibacterial preservative film and preparation method thereof Pending CN109422983A (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110367246A (en) * 2019-07-10 2019-10-25 邱张云 A kind of natural plants specially treated technique
CN111057251A (en) * 2019-12-31 2020-04-24 浙江工业大学 Preparation method of cationic hydrogel
CN112358655A (en) * 2020-11-09 2021-02-12 绍兴兆丽新材料科技有限公司 Environment-friendly medicine packaging material and preparation method thereof
CN112515085A (en) * 2020-11-30 2021-03-19 四川农业大学 Novel preservation card and preparation method thereof
CN113004643A (en) * 2021-03-18 2021-06-22 浙江农林大学 starch/PVA composite antibacterial preservative film and preparation method thereof
CN113388135A (en) * 2021-04-25 2021-09-14 广西民族大学 Preparation of PVA/cassava starch/LAE active composite membrane and application of PVA/cassava starch/LAE active composite membrane in food packaging bacteriostasis
WO2022027607A1 (en) * 2020-08-07 2022-02-10 南京五瑞生物降解新材料研究院有限公司 Novel fresh-keeping bag capable of being dissolved in seawater and preparation method therefor
WO2024145455A1 (en) * 2022-12-28 2024-07-04 Monosol, Llc Hybrid starch/pvoh water-soluble films

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110367246A (en) * 2019-07-10 2019-10-25 邱张云 A kind of natural plants specially treated technique
CN111057251A (en) * 2019-12-31 2020-04-24 浙江工业大学 Preparation method of cationic hydrogel
CN111057251B (en) * 2019-12-31 2024-02-13 浙江工业大学 Preparation method of cationic hydrogel
WO2022027607A1 (en) * 2020-08-07 2022-02-10 南京五瑞生物降解新材料研究院有限公司 Novel fresh-keeping bag capable of being dissolved in seawater and preparation method therefor
CN112358655A (en) * 2020-11-09 2021-02-12 绍兴兆丽新材料科技有限公司 Environment-friendly medicine packaging material and preparation method thereof
CN112515085A (en) * 2020-11-30 2021-03-19 四川农业大学 Novel preservation card and preparation method thereof
CN113004643A (en) * 2021-03-18 2021-06-22 浙江农林大学 starch/PVA composite antibacterial preservative film and preparation method thereof
CN113388135A (en) * 2021-04-25 2021-09-14 广西民族大学 Preparation of PVA/cassava starch/LAE active composite membrane and application of PVA/cassava starch/LAE active composite membrane in food packaging bacteriostasis
CN113388135B (en) * 2021-04-25 2023-08-29 广西民族大学 Preparation of PVA/tapioca starch/LAE active composite film and application of PVA/tapioca starch/LAE active composite film in food packaging bacteriostasis
WO2024145455A1 (en) * 2022-12-28 2024-07-04 Monosol, Llc Hybrid starch/pvoh water-soluble films

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