CN110511471A - A kind of environment-friendly type antibiotic plastic film and its preparation process - Google Patents
A kind of environment-friendly type antibiotic plastic film and its preparation process Download PDFInfo
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- CN110511471A CN110511471A CN201910900277.2A CN201910900277A CN110511471A CN 110511471 A CN110511471 A CN 110511471A CN 201910900277 A CN201910900277 A CN 201910900277A CN 110511471 A CN110511471 A CN 110511471A
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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
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/06—Polyethene
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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
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2397/00—Characterised by the use of lignin-containing materials
- C08J2397/02—Lignocellulosic material, e.g. wood, straw or bagasse
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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
- C08J2401/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
- C08J2401/02—Cellulose; Modified cellulose
Abstract
The invention discloses a kind of environment-friendly type antibiotic plastic films, the antibacterial layer including film matrix and coated on one side surface of film matrix；The film matrix is made of following raw material: 60-70 parts of polyethylene, beta-hydroxybutyric acid 20-30 parts poly-, modification bamboo powder 3-4 parts, 5-8 parts of polyethylene wax, 2-3 parts of ferric stearate, 1-2 parts of antioxidant, 1-2 parts of plasticizer；The antibacterial layer is coated on film matrix surface by antibacterial film liquid and is formed；The invention also discloses the preparation processes of the plastic film.The present invention is by using polyethylene and poly- beta-hydroxybutyric acid as film matrix, and poly- beta-hydroxybutyric acid can effectively play its biodegrade and light degradation property under ferric stearate effect, and incorporating modified bamboo powder carries out enhancing improvement to it, improves mechanical property and intensity；By coating antibacterial film coating liquid in film matrix surface, not only there is excellent anti-microbial property, but also the binding force between antibacterial layer and film matrix can be enhanced, improve the globality of plastic film.
Description
Technical field
The invention belongs to plastic film technical fields, and in particular, to a kind of environment-friendly type antibiotic plastic film and its preparation
Technique.
Background technique
Plastic film is the film made of polyvinyl chloride, polyethylene, polypropylene, polystyrene and other resins, is used
In packaging, and it is used as coating layer.Shared share is increasing on the market for plastics package and plastic packet product, especially
Composite plastic flexible package has been widely used for the fields such as food, medicine, chemical industry.Incident simultaneously is plastic film
Pollution to environment can rest in soil for a long time since common plastic film ingredient is difficult to decompose, influence plant growth,
Environment is polluted, and does not have antibiotic property.
The patent of invention of Patent No. CN201310550251.2 discloses a kind of preparation method of antibacterial composite film material,
It is mixed including raw material, the preparation of polyamic acid/presoma, plastic film mulch, five technical process of preparation and drying of laminated film, this kind
Colloidal sol is prepared using hydro-thermal method in preparation method, wet chemistry method is avoided and needs to make hydroxide be converted to oxide by calcining
And the step of hard agglomerate easy to form, do not generate other impurities or derived material, by temperature in strict control baking oven and
Soaking time, film formation speed is fast, and film quality is good, high mechanical strength, is not easy to break, and passes through last stoving process mistake
Journey, the laminated film prepared are had excellent performance, and have the netted distributed architecture of local, physical property and dielectric properties are excellent, resistance to electricity
Dizzy significant effect, fully meets the requirement in power industry for insulating performance of cable, long service life, stable processing technique
It is good；Realize that fungistatic effect, fungistatic effect cannot be permanent by adding antibacterial compound in the raw material of this application, while in raw material
The 4,4 '-diaminodiphenyl ethers etc. of addition have very big harm to human health and Environmental security.
Summary of the invention
The purpose of the present invention is to provide a kind of environment-friendly type antibiotic plastic film and its preparation processes, by using polyethylene
With poly- beta-hydroxybutyric acid as film matrix, poly- beta-hydroxybutyric acid can effectively play its biodegrade and light under ferric stearate effect
Degradation property makes plastic film meet environmental requirement, and incorporating modified bamboo powder carries out enhancing improvement to film matrix, and bamboo powder is by changing
Property after can not only be dispersed in polyvinyl body, and can with PE macromolecular chain generate winding effect, improve film base
The mechanical property and intensity of body；By coating one layer of antibacterial film coating liquid in film matrix surface, antibacterial film coating liquid not only has excellent
Anti-microbial property, and the binding force between antibacterial layer and film matrix can be enhanced, improve the globality of plastic film；Obtain one
The excellent environment-friendly type plastic film of kind mechanical property, anti-microbial property, can be widely applied.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of environment-friendly type antibiotic plastic film, the antibacterial layer including film matrix and coated on one side surface of film matrix；
The film matrix is made of following raw material: 60-70 parts of polyethylene, beta-hydroxybutyric acid 20-30 parts poly-, modified bamboo
3-4 parts of powder, 5-8 parts of polyethylene wax, 2-3 parts of ferric stearate, 1-2 parts of antioxidant, 1-2 parts of plasticizer；
The antibacterial layer is coated on film matrix surface by antibacterial film liquid and is formed；
The plastic film is made of following steps:
The first step, by polyethylene, poly- beta-hydroxybutyric acid, modified bamboo powder, polyethylene wax, ferric stearate, antioxidant and plasticizer
According to parts by weight than carrying out mixing in investment mixer, 175-185 DEG C is set by the operating temperature of mixer, revolving speed is
60-80r/min, incorporation time 12-15min；
Second step, blend composition after mixing, are put into mixer and carry out blown film in single screw rod inflation film manufacturing machine, obtain film
Matrix, the temperature setting of single screw rod inflation film manufacturing machine are that area's temperature is 170 DEG C, and two area's temperature are 190 DEG C, and three area's temperature are 190 DEG C,
Four area's temperature are 190 DEG C, and five area's temperature are 180 DEG C；
Film matrix is attached on the glass plate of bar coater and is fixed by third step, is coated with coating liquid using bar
In film matrix surface, after natural drying, antibacterial layer is formed, plastic film is made.
Further, the modified bamboo powder is prepared by the following method:
(1) serotonin hydrochloride is dissolved in distilled water, is configured to the modification liquid that mass fraction is 3%；
(2) bamboo powder is added in above-mentioned modification liquid according to solid-to-liquid ratio 1g:10mL, system is warming up to 55-60 DEG C, and in
First with 300r/min mechanical stirring 80-90min, re-ultrasonic dispersion 18-20min under 55-60 DEG C of constant temperature；
(3) after standing 2-3h, modified bamboo powder is made place the product in being dried in 50 DEG C of vacuum ovens to constant weight in filtering.
Further, the antibacterial film liquid is made by the following method:
(1) cellulose powder is placed in 80 DEG C of vacuum ovens and is dried to constant weight；
(2) n,N-dimethylacetamide for measuring 145.6mL is added in 500mL three-necked flask, and 150r/min's
Cellulose after being slowly added to 3.2g drying under stirring condition, three-necked flask is placed in 130 DEG C of oil bath pan, keeps 150r/
The at the uniform velocity stirring of min keeps the temperature 2h after liquid in flask is warming up to 130 DEG C；
(3) 100 DEG C are cooled the temperature to, 11.2g anhydrous lithium chloride is added, continues 150r/min and stirs 1h, room temperature stands 10-
12h obtains cellulose mixed liquor；
(4) it weighs the above-mentioned cellulose mixed liquor of 24g to be added in three-necked flask, under 150r/min mechanical agitation successively
1.2g sorbic acid, 1.6g dicyclohexylcarbodiimide is added, after mixing evenly, 82-84 DEG C is warming up under the conditions of oil bath, reacts 7-
8h, to after reaction, be down to room temperature, deaeration obtains antibacterial film liquid.
A kind of preparation process of environment-friendly type antibiotic plastic film, includes the following steps:
The first step, by polyethylene, poly- beta-hydroxybutyric acid, modified bamboo powder, polyethylene wax, ferric stearate, antioxidant and plasticizer
According to parts by weight than carrying out mixing in investment mixer, 175-185 DEG C is set by the operating temperature of mixer, revolving speed is
60-80r/min, incorporation time 12-15min；
Second step, blend composition after mixing, are put into mixer and carry out blown film in single screw rod inflation film manufacturing machine, obtain film
Matrix, the temperature setting of single screw rod inflation film manufacturing machine are that area's temperature is 170 DEG C, and two area's temperature are 190 DEG C, and three area's temperature are 190 DEG C,
Four area's temperature are 190 DEG C, and five area's temperature are 180 DEG C；
Film matrix is attached on the glass plate of bar coater and is fixed by third step, is coated with coating liquid using bar
In film matrix surface, after natural drying, antibacterial layer is formed, plastic film is made.
Beneficial effects of the present invention:
Plastic film of the invention includes film matrix, and film matrix is using polyethylene and poly- beta-hydroxybutyric acid as polymer matrix
Body, and enhancing modification, the modified bamboo powder of serotonin, on the one hand, serotonin are carried out to polymeric matrix using modified bamboo powder
Hydroxyl on phenolic hydroxyl group and amino group and bamboo fibre strand can occur chemical reaction and graft on bamboo fibre surface；An other side
Face, the phenolic hydroxyl group in serotonin molecular structure can form Hydrogenbond with the free hydroxyl group in bamboo fibre and attach to bamboo fibre
Surface forms the structure of serotonin package bamboo powder；Serotonin is attached to bamboo powder surface, and one, serotonin molecule is presented
The substrates such as phenolic hydroxyl group, amino get close to group out, in addition, serotonin reduces the quantity of bamboo powder surface free hydroxyl group, reduce
The polarity on bamboo powder surface is easy modified bamboo powder compatible with PE polymer substrate, and effect of the serotonin to bamboo powder and HDPE makes
It obtains the two to be easier that two-phase ganged movement occurs in melt blending, is conducive to bamboo powder and is uniformly divided by flowing shear action
It dissipates；The interface cohesion of matrix polymer and bamboo fibre is preferable, and fracture occurs mostly on matrix, rather than HDPE and bamboo powder circle
Face, and film, when by external force, matrix polymer can be effectively by stress transfer to bamboo fibre, therefore improves modeling
Expect the mechanical property of film；Meanwhile the phenyl ring and hydrocarbon group of serotonin and the macromolecular chain of PE generate physical entanglement etc. and make
With effectively improving two-phase interface, improve the intensity of plastic film；
The present invention is coated with one layer of antibacterial film coating liquid on the surface of film matrix, in coating liquid by carboxyl on sorbic acid (-
COOH esterification) occurs with (- the OH) on cellulose molecular chain, makes to be grafted sorbate on cellulose molecular chain, on the one hand,
Sorbate is by being chemically grafted on cellulosic molecule, therefore bacteriostasis property is lasting；On the other hand, antibacterial compared to common
Agent sorbic acid, sorbate is more difficult to be decomposed in microbial metabolism, and sorbate is easier to penetrate into bacterial cell
In film, it can directly and promptly destroy the integrality of membrane structure and efficiently influence the growth of microorganism, there is stronger antibiotic property
Energy；When antibacterial film liquid is coated on film matrix surface, the complete sorbic acid of unreacted can also occur anti-with the hydroxyl on bamboo powder surface
It answers, increases the Replacement rate of sorbic acid, the content of sorbate can not only be improved, and then improve fungistatic effect, and can increase
Binding force between strong antibacterial layer and film matrix, improves the globality of plastic film；
By using polyethylene and poly- beta-hydroxybutyric acid as film matrix, poly- beta-hydroxybutyric acid acts on the present invention in ferric stearate
Under, its biodegrade and light degradation property can be effectively played, plastic film is made to meet environmental requirement, and incorporating modified bamboo powder pair
Film matrix carries out enhancing improvement, and bamboo powder can not only be dispersed in polyvinyl body by modified, and can be with PE
Macromolecular chain generates winding effect, improves the mechanical property and intensity of film matrix；By coating one layer of antibacterial in film matrix surface
Coating liquid, antibacterial film coating liquid not only has excellent anti-microbial property, but also can enhance the combination between antibacterial layer and film matrix
Power improves the globality of plastic film；Obtain the excellent environment-friendly type plastic film of a kind of mechanical property, anti-microbial property, Ke Yiguang
General application.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with embodiment, it is clear that described reality
Applying example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is general
Logical technical staff all other embodiment obtained without creative efforts belongs to what the present invention protected
Range.
A kind of environment-friendly type antibiotic plastic film, the antibacterial layer including film matrix and coated on one side surface of film matrix；Wherein,
Film matrix is made of following raw material: 60-70 parts of polyethylene, beta-hydroxybutyric acid 20-30 parts poly-, modification bamboo powder 3-4 parts, poly- second
5-8 parts of alkene wax, 2-3 parts of ferric stearate, 1-2 parts of antioxidant, 1-2 parts of plasticizer；
Antibacterial layer is coated on film matrix surface by antibacterial film liquid and is formed；
Modified bamboo powder is prepared by the following method:
(1) serotonin hydrochloride is dissolved in distilled water, is configured to the modification liquid that mass fraction is 3%；
(2) bamboo powder is added in above-mentioned modification liquid according to solid-to-liquid ratio 1g:10mL, system is warming up to 55-60 DEG C, and in
First with 300r/min mechanical stirring 80-90min, re-ultrasonic dispersion 18-20min under 55-60 DEG C of constant temperature；
(3) after standing 2-3h, modified bamboo powder is made place the product in being dried in 50 DEG C of vacuum ovens to constant weight in filtering；
Serotonin is modified bamboo powder, on the one hand, on the phenolic hydroxyl group and amino group and bamboo fibre strand of serotonin
Hydroxyl can occur chemical reaction and graft on bamboo fibre surface；Still further aspect, phenolic hydroxyl group in serotonin molecular structure can be with
Free hydroxyl group in bamboo fibre forms Hydrogenbond and attaches to bamboo fibre surface, forms the structure of serotonin package bamboo powder；
Serotonin is attached to bamboo powder surface, and one, serotonin molecule shows the substrates such as phenolic hydroxyl group, amino and gets close to group, in addition,
Serotonin reduces the quantity of bamboo powder surface free hydroxyl group, reduces the polarity on bamboo powder surface, keeps modified bamboo powder easy and PE
Polymer substrate is compatible, effect of the serotonin to bamboo powder and HDPE, so that the two is easier that two-phase occurs in melt blending
It is evenly dispersed by flowing shear action to be conducive to bamboo powder for ganged movement；The interface cohesion of matrix polymer and bamboo fibre compared with
Good, fracture occurs mostly on matrix, rather than HDPE and bamboo powder interface, and film, when by external force, matrix is poly-
Closing object can be effectively by stress transfer to bamboo fibre, therefore improves the mechanical property of plastic film；Meanwhile the benzene of serotonin
The macromolecular chain of ring and hydrocarbon group and PE generates the effects of physical entanglement, effectively improves two-phase interface, improves plastic film
Intensity；
The antibacterial film liquid is made by the following method:
(1) cellulose powder is placed in 80 DEG C of vacuum ovens and is dried to constant weight；
(2) n,N-dimethylacetamide for measuring 145.6mL is added in 500mL three-necked flask, and 150r/min's
Cellulose after being slowly added to 3.2g drying under stirring condition, three-necked flask is placed in 130 DEG C of oil bath pan, keeps 150r/
The at the uniform velocity stirring of min keeps the temperature 2h after liquid in flask is warming up to 130 DEG C；
(3) 100 DEG C are cooled the temperature to, 11.2g anhydrous lithium chloride is added, continues 150r/min and stirs 1h, room temperature stands 10-
12h obtains cellulose mixed liquor；
(4) it weighs the above-mentioned cellulose mixed liquor of 24g to be added in three-necked flask, under 150r/min mechanical agitation successively
1.2g sorbic acid, 1.6g dicyclohexylcarbodiimide is added, after mixing evenly, 82-84 DEG C is warming up under the conditions of oil bath, reacts 7-
8h, to after reaction, be down to room temperature, deaeration obtains antibacterial film liquid；
Esterification occurs by (- the OH) on the carboxyl (- COOH) and cellulose molecular chain on sorbic acid, makes cellulose
Sorbate is grafted on strand, on the one hand, sorbate is therefore the bacteriostasis property by being chemically grafted on cellulosic molecule
Persistently；On the other hand, compared to common antiseptic agents sorbic acid, sorbate is more difficult to be decomposed in microbial metabolism, and
And sorbate is easier to penetrate into bacterial cell membrane, can directly and promptly destroy the integrality of membrane structure and efficiently influence micro-
The growth of biology has stronger anti-microbial property；
When antibacterial film liquid is coated on film matrix surface, the complete sorbic acid of unreacted can also be sent out with the hydroxyl on bamboo powder surface
Raw reaction, increases the Replacement rate of sorbic acid, can not only improve the content of sorbate, and then improve fungistatic effect, and
The binding force between antibacterial layer and film matrix can be enhanced, improve the globality of plastic film；
The preparation process of the plastic film, includes the following steps:
The first step, by polyethylene, poly- beta-hydroxybutyric acid, modified bamboo powder, polyethylene wax, ferric stearate, antioxidant and plasticizer
According to parts by weight than carrying out mixing in investment mixer, 175-185 DEG C is set by the operating temperature of mixer, revolving speed is
60-80r/min, incorporation time 12-15min；
Second step, blend composition after mixing, are put into mixer and carry out blown film in single screw rod inflation film manufacturing machine, obtain film
Matrix, the temperature setting of single screw rod inflation film manufacturing machine are that area's temperature is 170 DEG C, and two area's temperature are 190 DEG C, and three area's temperature are 190 DEG C,
Four area's temperature are 190 DEG C, and five area's temperature are 180 DEG C；
Film matrix is attached on the glass plate of bar coater and is fixed by third step, is coated with coating liquid using bar
In film matrix surface, after natural drying, antibacterial layer is formed, plastic film is made.
Embodiment 1
A kind of environment-friendly type antibiotic plastic film, the antibacterial layer including film matrix and coated on one side surface of film matrix；Wherein,
Film matrix is made of following raw material: 60 parts of polyethylene, 20 parts of poly- beta-hydroxybutyric acid, modified 3 parts of bamboo powder, 5 parts of polyethylene wax,
2 parts of ferric stearate, 1 part of antioxidant, 1 part of plasticizer；
Antibacterial layer is coated on film matrix surface by antibacterial film liquid and is formed；
The plastic film is made of following steps:
The first step, by polyethylene, poly- beta-hydroxybutyric acid, modified bamboo powder, polyethylene wax, ferric stearate, antioxidant and plasticizer
According to parts by weight than carrying out mixing in investment mixer, 175 DEG C are set by the operating temperature of mixer, revolving speed 60r/
Min, incorporation time 12min；
Second step, blend composition after mixing, are put into mixer and carry out blown film in single screw rod inflation film manufacturing machine, obtain film
Matrix, the temperature setting of single screw rod inflation film manufacturing machine are that area's temperature is 170 DEG C, and two area's temperature are 190 DEG C, and three area's temperature are 190 DEG C,
Four area's temperature are 190 DEG C, and five area's temperature are 180 DEG C；
Film matrix is attached on the glass plate of bar coater and is fixed by third step, is coated with coating liquid using bar
In film matrix surface, after natural drying, antibacterial layer is formed, plastic film is made.
Embodiment 2
A kind of environment-friendly type antibiotic plastic film, the antibacterial layer including film matrix and coated on one side surface of film matrix；Wherein,
Film matrix is made of following raw material: 65 parts of polyethylene, 25 parts of poly- beta-hydroxybutyric acid, modified 3.5 parts of bamboo powder, polyethylene wax
6.5 parts, 2.5 parts of ferric stearate, 1.5 parts of antioxidant, 1.5 parts of plasticizer；
Antibacterial layer is coated on film matrix surface by antibacterial film liquid and is formed；
The plastic film is made of following steps:
The first step, by polyethylene, poly- beta-hydroxybutyric acid, modified bamboo powder, polyethylene wax, ferric stearate, antioxidant and plasticizer
According to parts by weight than carrying out mixing in investment mixer, 180 DEG C are set by the operating temperature of mixer, revolving speed 70r/
Min, incorporation time 13min；
Second step, blend composition after mixing, are put into mixer and carry out blown film in single screw rod inflation film manufacturing machine, obtain film
Matrix, the temperature setting of single screw rod inflation film manufacturing machine are that area's temperature is 170 DEG C, and two area's temperature are 190 DEG C, and three area's temperature are 190 DEG C,
Four area's temperature are 190 DEG C, and five area's temperature are 180 DEG C；
Film matrix is attached on the glass plate of bar coater and is fixed by third step, is coated with coating liquid using bar
In film matrix surface, after natural drying, antibacterial layer is formed, plastic film is made.
Embodiment 3
A kind of environment-friendly type antibiotic plastic film, the antibacterial layer including film matrix and coated on one side surface of film matrix；Wherein,
Film matrix is made of following raw material: 70 parts of polyethylene, 30 parts of poly- beta-hydroxybutyric acid, modified 4 parts of bamboo powder, 8 parts of polyethylene wax,
3 parts of ferric stearate, 2 parts of antioxidant, 2 parts of plasticizer；
Antibacterial layer is coated on film matrix surface by antibacterial film liquid and is formed；
The plastic film is made of following steps:
The first step, by polyethylene, poly- beta-hydroxybutyric acid, modified bamboo powder, polyethylene wax, ferric stearate, antioxidant and plasticizer
According to parts by weight than carrying out mixing in investment mixer, 185 DEG C are set by the operating temperature of mixer, revolving speed 80r/
Min, incorporation time 15min；
Second step, blend composition after mixing, are put into mixer and carry out blown film in single screw rod inflation film manufacturing machine, obtain film
Matrix, the temperature setting of single screw rod inflation film manufacturing machine are that area's temperature is 170 DEG C, and two area's temperature are 190 DEG C, and three area's temperature are 190 DEG C,
Four area's temperature are 190 DEG C, and five area's temperature are 180 DEG C；
Film matrix is attached on the glass plate of bar coater and is fixed by third step, is coated with coating liquid using bar
In film matrix surface, after natural drying, antibacterial layer is formed, plastic film is made.
Comparative example 1
Change the modification bamboo powder in 1 film matrix material of embodiment into common bamboo powder, remaining raw material and preparation process are constant.
Comparative example 2
Modified bamboo powder raw material in 1 film matrix material of embodiment is removed, remaining raw material and preparation process are constant.
Comparative example 3
Sorbic acid is added in 1 film matrix material of embodiment to be directly blended, no longer coats film in film matrix surface
Liquid.
To plastic film made from embodiment 1-3 and comparative example 1-3, following performance test is done:
By the mechanical property of national standard GB 13022-91 testing film；Testing film is to Escherichia coli and Staphylococcus aureus
The bacteriostasis rate of bacterium；By film sample in being embedded in soil after 10d under room temperature, degradation rate is tested；Test result is as follows table:
As seen from table, transverse modulus of elasticity, tensile strength and the elongation at break of plastic film made from embodiment 1-3 point
Not Wei 518.7-523.5MPa, 58.5-60.1MPa, 480.1-485.2%, longitudinal modulus of elasticity, tensile strength and extension at break
Rate is respectively 669.9-674.3MPa, 23.8-24.9MPa, 201.6-204.1%, it is known that, plastic film tool produced by the present invention
There is good mechanical property；Compared to comparative example 1, illustrate that bamboo powder by modified, can enhance the compatibility with matrix, in turn
The mechanical property of reinforced plastics film；Compared to comparative example 2, illustrate that the addition of bamboo powder can play the effect of enhancing to film；
As seen from table, plastic film made from embodiment 1-3 is 98.0-99.2%, staphylococcus aureus to Escherichia coli bacteriostasis rate
Bacteriostasis rate is 97.5-98.2%, illustrates that plastic film produced by the present invention has good bacteriostasis property；Compared to comparative example 1
With comparative example 2, illustrates that bamboo powder can be uniformly distributed in film matrix by modified, phase interaction can occur with antibacterial film coating liquid
With, and then increase the globality of plastic film；As seen from table, plastic film made from embodiment 1-3 is under room temperature in soil
The degradation rate that 10d is buried in earth is 84-86%, has good degradation property, meets environmental requirement.
Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.There is no detailed for preferred embodiment
All details are described, are not limited the invention to the specific embodiments described.Obviously, according to the content of this specification,
It can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is in order to better explain the present invention
Principle and practical application, so that skilled artisan be enable to better understand and utilize the present invention.The present invention is only
It is limited by claims and its full scope and equivalent.
Claims (4)
1. a kind of environment-friendly type antibiotic plastic film, which is characterized in that the suppression including film matrix and coated on one side surface of film matrix
Bacterium layer；
The film matrix is made of following raw material: 60-70 parts of polyethylene, beta-hydroxybutyric acid 20-30 parts poly-, modification bamboo powder 3-
4 parts, 5-8 parts of polyethylene wax, 2-3 parts of ferric stearate, 1-2 parts of antioxidant, 1-2 parts of plasticizer；
The antibacterial layer is coated on film matrix surface by antibacterial film liquid and is formed；
The plastic film is made of following steps:
The first step, by polyethylene, poly- beta-hydroxybutyric acid, modified bamboo powder, polyethylene wax, ferric stearate, antioxidant and plasticizer according to
Weight fraction ratio, which is put into, carries out mixing in mixer, set 175-185 DEG C for the operating temperature of mixer, revolving speed 60-
80r/min, incorporation time 12-15min；
Second step, blend composition after mixing, are put into mixer and carry out blown film in single screw rod inflation film manufacturing machine, obtain film base
Body, the temperature setting of single screw rod inflation film manufacturing machine are that area's temperature is 170 DEG C, two area's temperature be 190 DEG C, three area's temperature be 190 DEG C, four
Area's temperature is 190 DEG C, and five area's temperature are 180 DEG C；
Film matrix is attached on the glass plate of bar coater and is fixed by third step, and coating liquid is coated on film using bar
Matrix surface after natural drying, forms antibacterial layer, and plastic film is made.
2. a kind of environment-friendly type antibiotic plastic film according to claim 1, which is characterized in that the modified bamboo powder is by as follows
Method preparation:
(1) serotonin hydrochloride is dissolved in distilled water, is configured to the modification liquid that mass fraction is 3%；
(2) bamboo powder is added in above-mentioned modification liquid according to solid-to-liquid ratio 1g:10mL, system is warming up to 55-60 DEG C, and in 55-60
First with 300r/min mechanical stirring 80-90min, re-ultrasonic dispersion 18-20min under DEG C constant temperature；
(3) after standing 2-3h, modified bamboo powder is made place the product in being dried in 50 DEG C of vacuum ovens to constant weight in filtering.
3. a kind of environment-friendly type antibiotic plastic film according to claim 1, which is characterized in that the antibacterial film liquid is by as follows
Method is made:
(1) cellulose powder is placed in 80 DEG C of vacuum ovens and is dried to constant weight；
(2) n,N-dimethylacetamide for measuring 145.6mL is added in 500mL three-necked flask, and in the stirring of 150r/min
Under the conditions of be slowly added to 3.2g it is dry after cellulose, three-necked flask is placed in 130 DEG C of oil bath pan, keeps 150r/min's
It at the uniform velocity stirs, keeps the temperature 2h after liquid in flask is warming up to 130 DEG C；
(3) 100 DEG C are cooled the temperature to, 11.2g anhydrous lithium chloride is added, continues 150r/min and stirs 1h, room temperature stands 10-12h,
Obtain cellulose mixed liquor；
(4) it weighs the above-mentioned cellulose mixed liquor of 24g to be added in three-necked flask, be sequentially added under 150r/min mechanical agitation
1.2g sorbic acid, 1.6g dicyclohexylcarbodiimide are warming up to 82-84 DEG C after mixing evenly under the conditions of oil bath, react 7-8h,
To after reaction, be down to room temperature, deaeration obtains antibacterial film liquid.
4. a kind of preparation process of environment-friendly type antibiotic plastic film, which comprises the steps of:
The first step, by polyethylene, poly- beta-hydroxybutyric acid, modified bamboo powder, polyethylene wax, ferric stearate, antioxidant and plasticizer according to
Weight fraction ratio, which is put into, carries out mixing in mixer, set 175-185 DEG C for the operating temperature of mixer, revolving speed 60-
80r/min, incorporation time 12-15min；
Second step, blend composition after mixing, are put into mixer and carry out blown film in single screw rod inflation film manufacturing machine, obtain film base
Body, the temperature setting of single screw rod inflation film manufacturing machine are that area's temperature is 170 DEG C, two area's temperature be 190 DEG C, three area's temperature be 190 DEG C, four
Area's temperature is 190 DEG C, and five area's temperature are 180 DEG C；
Film matrix is attached on the glass plate of bar coater and is fixed by third step, and coating liquid is coated on film using bar
Matrix surface after natural drying, forms antibacterial layer, and plastic film is made.
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