CN106633558A - Titanium-dioxide-doped bentonite/PVA (polyvinyl alcohol) bactericidal preservative film and preparation method thereof - Google Patents
Titanium-dioxide-doped bentonite/PVA (polyvinyl alcohol) bactericidal preservative film and preparation method thereof Download PDFInfo
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- CN106633558A CN106633558A CN201611251968.7A CN201611251968A CN106633558A CN 106633558 A CN106633558 A CN 106633558A CN 201611251968 A CN201611251968 A CN 201611251968A CN 106633558 A CN106633558 A CN 106633558A
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- bentonite
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- polyvinyl alcohol
- preservative film
- pva
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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
- C08L29/00—Compositions 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
- C08L29/02—Homopolymers or copolymers of unsaturated alcohols
- C08L29/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic 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
- 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
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2329/00—Characterised by the use 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; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
- C08J2329/02—Homopolymers or copolymers of unsaturated alcohols
- C08J2329/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
-
- 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
- C08J2433/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
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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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Abstract
The invention discloses a titanium-dioxide-doped bentonite/PVA (polyvinyl alcohol) bactericidal preservative film and a preparation method thereof. The invention is characterized in that the preservative film is prepared from the following raw materials in parts by weight: 2-4 parts of nano titanium dioxide, 20-30 parts of garlic spread, 50-60 parts of polyvinyl alcohol, 30-40 parts of acrylic resin emulsion, 1-2 parts of ferrous chloride, 2-3 parts of sucrose, 0.2-0.5 part of phosphopyridoxal, 15-25 parts of bentonite, 30-40 parts of beta-cyclodextrin, 2-5 parts of sodium dodecylsulfate, 2-3 parts of glycerol, 600-1000 parts of deionized water and 100-600 parts of anhydrous ethanol. The garlic oil is carried by the bentonite and included by the cyclodextrin, thereby solving the problem of pungent odor in organic sulfides, performing the slow-release function, prolonging the bactericidal life, enhancing the dispersity of the bentonite in the polyvinyl alcohol substrate, and enhancing the water resistance of the preservative film. The added nano titanium dioxide is matched to enhance the hydrophobicity of the preservative film.
Description
Technical field
The present invention relates to preservative film and preparation method thereof, and in particular to a kind of bentonite/PVA of titania additive is sterilized
Preservative film and preparation method thereof.
Background technology
Preservative film plays an important role in storage fruit and vegetable, different fruits and vegetables due to differences such as water content, respiratory intensities,
The requirement of the performances such as the air-moisture-permeable to preservative film is also different, and presently commercially available preservative film generally existing breathable moisture permeability is poor
The problems such as, due to containing substantial amounts of light base in PVA macromolecules, with extremely strong hydrophily, make PVA film water absorption rate very high, instead
And have impact on application of the PVA film in food fresh keeping.There are some researches show the small-size effect and Hong sight Liang Insurance roads of nano particle
Effect can have an effect with the unsaturated bond of fluoropolymer resin, greatly improve the performances such as resistance to water, the stability of resin material.
Garlic oil is the functional components formed after garlic crushes, and with high-efficiency broad spectrum antibacterial action, its principle is mainly
Using oxidation of the organic sulfur compound molecule to sulfydryl in protein molecule in garlic oil, give birth to the microorganisms such as bacterium, fungi
Enzyme-deactivating necessary to long breeding, so as to inhibit the growth and breeding of microorganism.Garlic oil can also be made by lipid oxidation
With the characteristic for changing somatic cells film and organelle film, bacterium vivo environment and membranous system are damaged and thalline is killed.In addition,
Garlic oil can also affect the dissolved oxygen amount in thalli growth breeding system, so as to the growing environment of thalline host carry out intervene and
Affect.In being introduced into preservative film, the sterilization fresh-keeping effect of preservative film will certainly be increased.
Yellow Hui honor is in its master thesis《The preparation of bentonite/PVA preservative films and its application in mango fresh-keeping are ground
Study carefully》In, a kind of preservative film is prepared for using bentonite and polyvinyl alcohol, but it does not possess bactericidal effect, while bentonite exists
Decentralization in polyvinyl alcohol need to be improved.
The content of the invention
Think deeply based on more than, the present invention is intended to provide a kind of sterilization fresh-keeping film, gives the function of common fresh-keeping membrane sterilization, together
The amalgamation of Shi Tigao modified particles and film substrate.
The technical problem to be solved is realized using following technical scheme：
The bentonite of a kind of titania additive/PVA sterilization fresh-keeping films, it is characterised in that be by the raw material system of following weight portion
Into：
Nano titanium oxide 2-4, mashed garlic 20-30, polyvinyl alcohol 50-60, emulsion acrylic resin 30-40, frerrous chloride 1-2,
Sucrose 2-3, phosphopyridoxal pyridoxal phosphate 0.2-0.5, bentonite 15-25, beta-schardinger dextrin 30-40, dodecyl sodium sulfate 2-5, glycerine 2-
3, deionized water 600-1000, absolute ethyl alcohol 100-600；
The solid content of the emulsion acrylic resin is 10-20%.
The preparation method of the bentonite of described a kind of titania additive/PVA sterilization fresh-keeping films, it is characterised in that be
It is made up of following steps：
A. mashed garlic is dispersed in 80-100 part deionized waters, adds frerrous chloride, sucrose, phosphopyridoxal pyridoxal phosphate, be in temperature
30-40 DEG C, pH is to digest under the conditions of 6-7 after 50-70min, adds 80-100 part absolute ethyl alcohols, ultrasonic extraction 40-60min to obtain
To the ethanol solution containing garlic oil；
B. bentonite is added in step a gained ethanol solution, high-speed stirred disperses bentonite, makes
Suspension, suspension is transferred in 40-80 DEG C of drying box, is fully dried, and obtains bulk material, then with pulverizer by block
Shape material disintegrating, crosses 100-200 mesh sieves, obtains the mixture of alta-mud load garlic oil；
C. by beta-schardinger dextrin add 200-300 part deionized waters in, stirring and dissolving, add step b gained mixture, 12
Sodium alkyl sulfonate, under the conditions of 20-40 DEG C, ultrasonic power 350-550W, carries out inclusion reaction 1-2h, then crystallisation by cooling, very
Empty suction filtration, several times, 20-40 DEG C of drying obtains Benexate Hydrochloride to filter residue absolute ethanol washing；
D. by nano titanium oxide 20-30 part absolute ethyl alcohol ultrasonic disperses, after being dried, with emulsion acrylic resin to its table
Face is sprayed, and is persistently stirred after 10-30min, is dried, and obtains mixture；
E. step c gained inclusion compound, step d gained mixture, glycerine are added in 100-200 part deionized waters, dispersion is equal
It is even to make suspension, polyvinyl alcohol is added, 80-95 DEG C is warming up to, ultrasonic 40-60min dissolves polyvinyl alcohol, continues ultrasound
30-50min excludes bubble, and mixed liquor is poured on poly (methyl methacrylate) plate, to use and stand 20- under scraper for coating film forming, room temperature by cooling
30h, is dried.
A kind of preparation method of the bentonite of described titania additive/PVA sterilization fresh-keeping films, it is characterised in that step
Suddenly drying condition described in e is：20-30h is dried in 40-50 DEG C of vacuum drying chamber.
The invention has the beneficial effects as follows：After garlic is broken, the alliin of odorless is in allinnase, phosphopyridoxal pyridoxal phosphate and gold
There is catalytic reaction under the synergy of category ion, the organic sulfur compound with overpowering odor is formed, to mercapto in protein molecule
The oxidation of base, makes enzyme-deactivating necessary to the microbial growths such as bacterium, fungi, so as to inhibit the growth of microorganism
And breeding；Garlic oil is loaded with bentonite, and is included with cyclodextrin, not only solved organic sulfur compound and there is thorn
The problem of sharp property smell, plays slow releasing function, extends its sterilized life-span, also improve bentonite in polyvinyl alcohol substrate point
Scattered property, promotes it to merge, and improves the resistance to water of preservative film；The nano titanium oxide for coordinating addition improves the hydrophobic of preservative film
Property.
Specific embodiment
The specific embodiment invented is further described with reference to embodiment.
Embodiment
The bentonite of a kind of titania additive/PVA sterilization fresh-keeping films, it is characterised in that be by the original of following weight portion
Material is made：
Nano titanium oxide 4, mashed garlic 30, polyvinyl alcohol 60, emulsion acrylic resin 40, frerrous chloride 2, sucrose 3, phosphoric acid pyrrole is trembled
Aldehyde 0.5, bentonite 25, beta-schardinger dextrin 40, dodecyl sodium sulfate 5, glycerine 3, deionized water 1000, absolute ethyl alcohol 600；
The solid content of the emulsion acrylic resin is 10-20%.
The preparation method of the bentonite of described a kind of titania additive/PVA sterilization fresh-keeping films, it is characterised in that be
It is made up of following steps：
A. mashed garlic is dispersed in 80-100 part deionized waters, adds frerrous chloride, sucrose, phosphopyridoxal pyridoxal phosphate, be in temperature
30-40 DEG C, pH is to digest under the conditions of 6-7 after 50-70min, adds 80-100 part absolute ethyl alcohols, ultrasonic extraction 40-60min to obtain
To the ethanol solution containing garlic oil；
B. bentonite is added in step a gained ethanol solution, high-speed stirred disperses bentonite, makes
Suspension, suspension is transferred in 40-80 DEG C of drying box, is fully dried, and obtains bulk material, then with pulverizer by block
Shape material disintegrating, crosses 100-200 mesh sieves, obtains the mixture of alta-mud load garlic oil；
C. by beta-schardinger dextrin add 200-300 part deionized waters in, stirring and dissolving, add step b gained mixture, 12
Sodium alkyl sulfonate, under the conditions of 20-40 DEG C, ultrasonic power 350-550W, carries out inclusion reaction 1-2h, then crystallisation by cooling, very
Empty suction filtration, several times, 20-40 DEG C of drying obtains Benexate Hydrochloride to filter residue absolute ethanol washing；
D. by nano titanium oxide 20-30 part absolute ethyl alcohol ultrasonic disperses, after being dried, with emulsion acrylic resin to its table
Face is sprayed, and is persistently stirred after 10-30min, is dried, and obtains mixture；
E. step c gained inclusion compound, step d gained mixture, glycerine are added in 100-200 part deionized waters, dispersion is equal
It is even to make suspension, polyvinyl alcohol is added, 80-95 DEG C is warming up to, ultrasonic 40-60min dissolves polyvinyl alcohol, continues ultrasound
30-50min excludes bubble, and mixed liquor is poured on poly (methyl methacrylate) plate, to use and stand 20- under scraper for coating film forming, room temperature by cooling
30h, is dried.
A kind of preparation method of the bentonite of described titania additive/PVA sterilization fresh-keeping films, it is characterised in that step
Suddenly drying condition described in e is：20-30h is dried in 40-50 DEG C of vacuum drying chamber.
The present invention properties of product test data be：To Escherichia coli and bacteria isolation rate >=85% of staphylococcus aureus,
Show preferable Antimicrobial effect.
Claims (3)
1. the bentonite of a kind of titania additive/PVA sterilization fresh-keeping films, it is characterised in that be by the raw material of following weight portion
Make：
Nano titanium oxide 2-4, mashed garlic 20-30, polyvinyl alcohol 50-60, emulsion acrylic resin 30-40, frerrous chloride 1-2,
Sucrose 2-3, phosphopyridoxal pyridoxal phosphate 0.2-0.5, bentonite 15-25, beta-schardinger dextrin 30-40, dodecyl sodium sulfate 2-5, glycerine 2-
3, deionized water 600-1000, absolute ethyl alcohol 100-600；
The solid content of the emulsion acrylic resin is 10-20%.
2. the preparation method of the bentonite of a kind of titania additive according to claim 1/PVA sterilization fresh-keeping films, its
It is characterised by, is made up of following steps：
A. mashed garlic is dispersed in 80-100 part deionized waters, adds frerrous chloride, sucrose, phosphopyridoxal pyridoxal phosphate, be in temperature
30-40 DEG C, pH is to digest under the conditions of 6-7 after 50-70min, adds 80-100 part absolute ethyl alcohols, ultrasonic extraction 40-60min to obtain
To the ethanol solution containing garlic oil；
B. bentonite is added in step a gained ethanol solution, high-speed stirred disperses bentonite, makes
Suspension, suspension is transferred in 40-80 DEG C of drying box, is fully dried, and obtains bulk material, then with pulverizer by block
Shape material disintegrating, crosses 100-200 mesh sieves, obtains the mixture of alta-mud load garlic oil；
C. by beta-schardinger dextrin add 200-300 part deionized waters in, stirring and dissolving, add step b gained mixture, 12
Sodium alkyl sulfonate, under the conditions of 20-40 DEG C, ultrasonic power 350-550W, carries out inclusion reaction 1-2h, then crystallisation by cooling, very
Empty suction filtration, several times, 20-40 DEG C of drying obtains Benexate Hydrochloride to filter residue absolute ethanol washing；
D. by nano titanium oxide 20-30 part absolute ethyl alcohol ultrasonic disperses, after being dried, with emulsion acrylic resin to its table
Face is sprayed, and is persistently stirred after 10-30min, is dried, and obtains mixture；
E. step c gained inclusion compound, step d gained mixture, glycerine are added in 100-200 part deionized waters, dispersion is equal
It is even to make suspension, polyvinyl alcohol is added, 80-95 DEG C is warming up to, ultrasonic 40-60min dissolves polyvinyl alcohol, continues ultrasound
30-50min excludes bubble, and mixed liquor is poured on poly (methyl methacrylate) plate, to use and stand 20- under scraper for coating film forming, room temperature by cooling
30h, is dried.
3. the preparation method of the bentonite of a kind of titania additive according to claim 2/PVA sterilization fresh-keeping films, its
It is characterised by, drying condition is described in step e：20-30h is dried in 40-50 DEG C of vacuum drying chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611251968.7A CN106633558A (en) | 2016-12-30 | 2016-12-30 | Titanium-dioxide-doped bentonite/PVA (polyvinyl alcohol) bactericidal preservative film and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611251968.7A CN106633558A (en) | 2016-12-30 | 2016-12-30 | Titanium-dioxide-doped bentonite/PVA (polyvinyl alcohol) bactericidal preservative film and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN106633558A true CN106633558A (en) | 2017-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611251968.7A Withdrawn CN106633558A (en) | 2016-12-30 | 2016-12-30 | Titanium-dioxide-doped bentonite/PVA (polyvinyl alcohol) bactericidal preservative film and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107624823A (en) * | 2017-09-29 | 2018-01-26 | 当涂县瑞龙果树种植专业合作社 | A kind of esterification soybean oil Synergistic herbicidal agents containing garlic oil and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1261605A (en) * | 1998-12-09 | 2000-08-02 | 可乐丽股份有限公司 | Vinyl alcohol polymer and its composition |
| CN102604292A (en) * | 2012-02-22 | 2012-07-25 | 湖南新五丰股份有限公司 | Active packaging film for chilled meat and preparation method of the active packaging film |
-
2016
- 2016-12-30 CN CN201611251968.7A patent/CN106633558A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1261605A (en) * | 1998-12-09 | 2000-08-02 | 可乐丽股份有限公司 | Vinyl alcohol polymer and its composition |
| CN102604292A (en) * | 2012-02-22 | 2012-07-25 | 湖南新五丰股份有限公司 | Active packaging film for chilled meat and preparation method of the active packaging film |
Non-Patent Citations (1)
| Title |
|---|
| 王磊: "大蒜油的提取及抗菌保鲜膜的研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅰ辑》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107624823A (en) * | 2017-09-29 | 2018-01-26 | 当涂县瑞龙果树种植专业合作社 | A kind of esterification soybean oil Synergistic herbicidal agents containing garlic oil and preparation method thereof |
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Application publication date: 20170510 |