CN111073181A - Preparation method of plant extract modified PVC plastic film - Google Patents
Preparation method of plant extract modified PVC plastic film Download PDFInfo
- Publication number
- CN111073181A CN111073181A CN201911420598.9A CN201911420598A CN111073181A CN 111073181 A CN111073181 A CN 111073181A CN 201911420598 A CN201911420598 A CN 201911420598A CN 111073181 A CN111073181 A CN 111073181A
- Authority
- CN
- China
- Prior art keywords
- preparation
- plant extract
- parts
- plastic film
- extract
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- 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
-
- 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
- C08J2327/00—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 a halogen; Derivatives of such polymers
- C08J2327/02—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 a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/04—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 a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08J2327/06—Homopolymers or copolymers of vinyl chloride
-
- 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
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/02—Organic and inorganic ingredients
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/346—Clay
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
- C08K5/0058—Biocides
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
- C08K5/098—Metal salts of carboxylic acids
Abstract
The invention provides a preparation method of a plant extract modified PVC plastic film, wherein the content of the plant extract in the PVC plastic film is 0.1-5%, and the preparation method specifically comprises the steps of preparation of the plant extract, preparation of a functional modifier, mixing, drying and molding; the prepared functional modifier containing the plant extract is prepared by mixing the plant extract with microcrystalline cellulose, adding montmorillonite for ultrasonic cell crushing, homogenizing under the pressure of 35-38MPa, and then freeze-drying under liquid nitrogen at the freezing temperature of-48 ℃, the vacuum degree of 0.03-0.04mbar and the freeze-drying time of 48-60h, so that the plant extract and the natural porous material can be better combined by adopting the method, and the finally prepared plant extract modified PVC plastic film has a plant bacteriostatic effect, and the bacteriostatic rate of common staphylococcus aureus, escherichia coli and candida albicans can reach 94.0-98.5%.
Description
Technical Field
The invention belongs to the technical field of plastic modification, and particularly relates to a preparation method of a plant extract modified PVC plastic film.
Background
With the increasing importance of people on health environment, the safety and sanitation of plastic products have become the subject of attention. In the using process of general plastics, various microorganisms are easily infected and bred, for example, a polyvinyl chloride (PVC) film with the largest using amount is easily mildewed and bred with various pathogenic bacteria if being in a wet state for a long time, and the harm is brought to the health of people. The antibacterial plastic is a novel material with antibacterial and bactericidal properties, can keep the material clean, and reduces cross infection caused by using plastic products.
The invention patent CN101580617B discloses an antibacterial polyvinyl chloride plastic and a preparation method thereof, wherein a nano titanium dioxide photocatalyst is directly added into a polyvinyl chloride resin matrix, and the photocatalyst is doped with antibacterial inorganic non-metallic anions, but the compatibility of the inorganic nano particles and the plastic matrix is poor, the mechanical property of the film can be reduced by directly adding the inorganic nano particles, and the tensile strength can be reduced from 18.9 MPa to 17.9MPa by adding 1.5 percent of nano titanium dioxide photocatalyst according to the description.
The invention patent CN103587020B provides a method for preparing a plant-derived antibacterial rubber film, which utilizes traditional Chinese medicine components such as flaveria bidentis, pteris odorata, ardisia crenata, ageratum, galangal, garlic, parsley and the like to prepare a plant-derived antibacterial compound through an enzymolysis extraction process, but the plant-derived antibacterial compound is only coated on the outer layer of polyvinyl chloride, and if the plant-derived antibacterial compound is directly fused with polyvinyl chloride, the problem of influencing the mechanical property of the film still exists.
The invention patent CN108189501A provides an antibacterial fresh-keeping food packaging plastic film, which is a biodegradable material and comprises an inner antibacterial layer, an outer antibacterial layer and an intermediate layer for adhering the inner antibacterial layer and the outer antibacterial layer, wherein various starches are mainly added to ensure that the polyvinyl chloride film has certain antibacterial property, but actually the antibacterial effect is limited, and the antibacterial fresh-keeping effect is not good.
Disclosure of Invention
In order to solve the problems in the prior art and further optimize the prior art, the invention provides a preparation method of a plant extract modified PVC plastic film, which aims to realize the following purposes:
1. increase tensile strength
2. Increase of elongation at break
3. Improving the bacteriostatic effect of plants
In order to solve the technical problems, the invention adopts the following technical scheme:
a preparation method of a plant extract modified PVC plastic film is characterized in that the content of plant extract in the PVC plastic film is 0.1-5%;
the plant extract is one or more of folium Artemisiae Argyi extract, herba Pileae Scriptae extract, lavender extract, rhizoma et radix Valerianae extract, and Sargassum extract, or one or more of quercetin, salicylic acid, emodin, menthol, menthone, hyperoside, fumaric acid, linalool, caffeic acid, calcium alginate, and sodium alginate;
the plant extracts are not limited to the above-listed kinds of plant extracts;
the preparation method of the plant extract modified PVC plastic film is characterized by comprising the steps of preparation of the plant extract, preparation of a functional modifier, mixing, drying and molding;
the preparation of the plant extract comprises the steps of grinding, extracting and pulping;
the grinding is carried out, wherein the plant is one or a combination of a plurality of wormwood, sarcandra glabra, lavender, valerian, chitin and seaweed;
preferably, the mixed mass ratio of valerian, chitin and seaweed is 3-5: 0.5-1.1: 1; the grain diameter is 50-300 μm;
extracting, wherein the extraction solution is a mixed solution of 60-70% of dichloromethane and water, and the dosage of the solution is 20-25 times of the weight of the plant fine powder; the temperature of the water bath is 30-35 ℃; the extraction time is 35-48 h;
the extraction comprises the steps of firstly concentrating an extract on a rotary evaporator, then adding water for dilution, and adding petroleum ether for extraction, wherein the water addition amount is 2-3 times of that of a concentrated solution; the total amount of the petroleum ether is 1-1.5 times of the total amount of the water phase;
the pulping is carried out at the temperature of minus 30 to minus 15 ℃, the rotating speed of 120 ℃ for 150r/min and the pulping time of 3 to 5 hours;
the yield of the prepared plant extract accounts for 5.20-6.85%, and the color of the plant extract is brownish yellow;
the preparation of the functional modifier comprises the steps of mixing the plant extract with microcrystalline cellulose, adding montmorillonite, carrying out ultrasonic cell pulverization under 800-1200W, homogenizing at 35-38MPa, and freeze-drying under liquid nitrogen at-48 deg.C under 0.03-0.04mbar for 48-60 h.
The preparation of the functional modifier comprises the following steps of preparing a plant extract, microcrystalline cellulose and montmorillonite in a mass ratio of 1: 5-8: 12-13;
the mixed material comprises the following raw materials in parts by weight: 65-80 parts of polyvinyl chloride resin, 0.5-5% of functional modifier, 3-5 parts of SiC nano powder, 4-6 parts of titanium dioxide, 3-5 parts of dilauryl thiodipropionate, 0.5-1.5 parts of POE elastomer toughening agent, 1.1-1.5 parts of pentaerythritol and 1.5-2 parts of zinc stearate;
the SiC nano powder has the average particle size of 50-80nm and the specific surface area of 55-60m2/g；
The titanium dioxide and TiO295-97wt% of the total weight of the powder, and 0.20-0.26 μm of the average particle size;
the drying is carried out at the oven temperature of 120-;
and the molding comprises the steps of preparing a polyethylene plastic film product by calendering at the temperature of 170-178 ℃ after the temperature of a feeding section of a double-screw extruder is 160-165 ℃, the temperature of a compression section is 165-175 ℃, the temperature of a head is 180-188 ℃, and the temperature of a neck mold is 178-186 ℃.
By adopting the technical scheme, the invention has the beneficial effects that:
1. the PVC plastic film prepared by the preparation method of the plant extract modified PVC plastic film has the tensile strength of 24.5-26.3MPa and the elongation at break of 710-755 percent;
2. by adopting the preparation method of the plant extract modified PVC plastic film, the prepared plastic film has plant bacteriostatic effect and good antibacterial effect, and the bacteriostatic rate of the plastic film on common staphylococcus aureus, escherichia coli and candida albicans can reach 94.0-98.5%;
3. by adopting the preparation method of the plant extract modified PVC plastic film, the prepared plastic film is subjected to a migration test by adopting a test method of GB31604.8-2016, and the total migration rate of additives in the plastic is 2-8.5 mg/kg;
4. by adopting the preparation method of the plant extract modified PVC plastic film, the plastic film has better air permeability, and the air permeability is 2720-2850cm3/（cm2·KPa·24h）；
5. By adopting the preparation method of the plant extract modified PVC plastic film, the plastic film has high transparency, and the haze of the film material is 18-22% and the light transmittance is 81.2-84.0% according to the test of ASTM D1003-2013 standard;
6. by adopting the preparation method of the plant extract modified PVC plastic film, the prepared plastic film has good temperature resistance, is not easy to deform and melt at high temperature, and can resist the high temperature of 110-.
The specific implementation mode is as follows:
the invention is further illustrated below with reference to specific examples.
Example 1 preparation method of plant extract modified PVC plastic film
The preparation method of the plant extract modified PVC plastic film comprises the following steps:
1. preparation of plant extract:
(1) grinding
Mixing dried rhizoma et radix Valerianae, chitin and Sargassum at a certain proportion, grinding into plant fine powder with particle size of 50-80 μm, and wrapping with filter paper;
the mixed mass ratio of the valerian, the chitin and the seaweed is 3: 0.5: 1;
(2) by extraction of
Adding an extraction solution, and extracting in a water bath environment by using a Soxhlet extractor until the pigment is completely extracted;
the extraction solution is a mixed solution of 60% dichloromethane and water, and the dosage of the solution is 20 times of the weight of the plant fine powder;
the temperature of the water bath is 30 ℃; the extraction time is 48 h;
(3) extraction of
After extraction, concentrating the extract on a rotary evaporator, heating to 30 ℃, controlling the vacuum degree at 0.06MPa, carrying out rotary evaporation until no liquid drops flow back, adding water for dilution, adding petroleum ether for extraction, carrying out secondary extraction on a water phase, and combining extract liquor;
the water addition amount is 2 times of that of the concentrated solution; the total amount of the petroleum ether is 1.5 times of the total amount of the water phase;
(4) beating
Concentrating the petroleum ether extract to 30%, pulping at low temperature, filtering, washing, and drying to obtain plant extract powder;
pulping at low temperature of-30 ℃, at the rotating speed of 150r/min, and for 3 h;
the yield of the prepared plant extract accounts for 5.20 percent, and the color of the plant extract is brownish yellow;
2. preparation of functional modifier:
weighing 1.00g of plant extract and 5.00g of microcrystalline cellulose in a beaker, adding water, stirring and dissolving to form suspension with the mass concentration of 2.0%, adding 12g of montmorillonite, placing in an ultrasonic cell crusher for treatment, and treating for 20min under the condition of the power of 1200W; then adding the mixture into a high-pressure homogenizer for homogenization treatment for 8min to obtain blended sol;
injecting the blended sol into a mold, and then carrying out freeze drying under liquid nitrogen, wherein the freeze drying temperature is-48 ℃, the vacuum degree is 0.03mbar, and the freeze drying time is 48 hours, so as to obtain functional modifier powder;
homogenizing under the pressure of 35 MPa;
3. mixing materials:
putting polyvinyl chloride resin, a functional modifier containing plant extracts and other raw materials into a mixing stirrer for mixing at a mixing speed of 500r/min for 1.5 h;
the raw materials comprise the following components in parts by weight: 65 parts of polyvinyl chloride resin, 0.5 part of functional modifier, 3 parts of SiC nano powder, 4 parts of titanium dioxide, 3 parts of dilauryl thiodipropionate, 0.5 part of POE elastomer toughening agent, 1.1 parts of pentaerythritol and 1.5 parts of zinc stearate;
the SiC nano powder has the average particle size of 50nm and the specific surface area of 55m2/g；
The titanium dioxide and TiO295wt% of the total amount of the components, and an average particle diameter of 0.20 μm;
4. and (3) drying:
putting the mixed raw materials into a drying oven for drying for 3h, wherein the temperature of the drying oven is 120 ℃, and the water content of the dried mixed raw materials is 0.05%;
5. shaping of
Plasticizing and blending the mixed material by a double-screw extruder, wherein the material supply section is 160-165 ℃, the compression section is 165-175 ℃, the head temperature is 180-185 ℃, and the die temperature is 178-180 ℃, and then calendering at 170-175 ℃ to obtain the polyethylene plastic film product.
The plant extract modified PVC plastic film prepared by the technical scheme of the embodiment 1 has the advantages of tensile strength of 24.5MPa, elongation at break of 715 percent and excellent mechanical property; the PVC plastic film has the plant antibacterial effect, and the bacteriostasis rate to common staphylococcus aureus, escherichia coli and candida albicans can reach 94.0 percent; by adopting the method, the total migration rate of the additives in the plastic is only 8.5 mg/kg; besides, the air permeability of the plastic film is 2720cm3/（cm2KPa.24 h), the haze of the film is 18%, the light transmittance is 84.0%, and the film can resist the high temperature of 110 ℃.
Example 2 preparation method of plant extract modified PVC plastic film
The preparation method of the plant extract modified PVC plastic film comprises the following steps:
1. preparation of plant extract:
(1) grinding
Mixing dried rhizoma et radix Valerianae, chitin and Sargassum at a certain proportion, grinding into plant fine powder with particle size of 100-;
the mixed mass ratio of the valerian, the chitin and the seaweed is 4: 1: 1;
(2) by extraction of
Adding an extraction solution, and extracting in a water bath environment by using a Soxhlet extractor until the pigment is completely extracted;
the extraction solution is a mixed solution of 70% dichloromethane and water, and the dosage of the solution is 20 times of the weight of the plant fine powder;
the temperature of the water bath is 35 ℃; the extraction time is 35 h;
(3) extraction of
After extraction, concentrating the extract on a rotary evaporator, heating to 35 ℃, controlling the vacuum degree at 0.06MPa, carrying out rotary evaporation until no liquid drops flow back, adding water for dilution, adding petroleum ether for extraction, carrying out secondary extraction on a water phase, and combining extract liquor;
the water addition amount is 3 times of that of the concentrated solution; the total amount of the petroleum ether is 1 time of the total amount of the water phase;
(4) beating
Concentrating the petroleum ether extract to 30%, pulping at low temperature, filtering, washing, and drying to obtain plant extract powder;
pulping at low temperature of-20 deg.C at a rotation speed of 120r/min for 5 h;
the yield of the prepared plant extract accounts for 6.26 percent, and the color of the plant extract is brownish yellow;
2. preparation of functional modifier:
weighing 1.00g of plant extract and 6.50g of microcrystalline cellulose in a beaker, adding water, stirring and dissolving to form suspension with the mass concentration of 2.5%, adding 12g of montmorillonite, placing in an ultrasonic cell crusher for treatment, and treating for 30min under the condition of the power of 800W; then adding the mixture into a high-pressure homogenizer for homogenization treatment for 10min to obtain blended sol;
injecting the blended sol into a mold, and then carrying out freeze drying under liquid nitrogen, wherein the freeze drying temperature is-48 ℃, the vacuum degree is 0.03mbar, and the freeze drying time is 48 hours, so as to obtain functional modifier powder;
homogenizing under the pressure of 35 MPa;
3. mixing materials:
putting polyvinyl chloride resin, a functional modifier containing plant extracts and other raw materials into a mixing stirrer for mixing at the mixing speed of 600r/min for 1.5 h;
the raw materials comprise the following components in parts by weight: 75 parts of polyvinyl chloride resin, 3 parts of a functional modifier, 4 parts of SiC nano powder, 5 parts of titanium dioxide, 3 parts of dilauryl thiodipropionate, 1 part of POE elastomer toughening agent, 1.1 parts of pentaerythritol and 2 parts of zinc stearate;
the SiC nano powder has the average particle size of 60-70nm and the specific surface area of 58m2/g；
The titanium dioxide and TiO2The content was 97% by weight, and the average particle diameter was 0.22. mu.m;
4. and (3) drying:
putting the mixed raw materials into a drying oven for drying for 5h, wherein the temperature of the drying oven is 120 ℃, and the water content of the dried mixed raw materials is 0.03%;
5. shaping of
Plasticizing and blending the mixed material by a double-screw extruder, wherein the material supply section is 160-containing 165 ℃, the compression section is 165-containing 170 ℃, the head temperature is 180-containing 188 ℃, and the die temperature is 178-containing 186 ℃, and then calendering at 170-containing 178 ℃ to obtain the polyethylene plastic film product.
The plant extract modified PVC plastic film prepared by the technical scheme of the embodiment 2 has the advantages of tensile strength of 26.3MPa, elongation at break of 720 percent and excellent mechanical property; the PVC plastic film has the plant antibacterial effect, and the bacteriostasis rate to common staphylococcus aureus, escherichia coli and candida albicans can reach 96.5 percent; by adopting the method, the total migration rate of the additives in the plastic is only 6.2 mg/kg; in addition, the air permeability of the plastic film is 2850cm3/（cm2KPa.24 h), the haze of the film is 21%, the light transmittance is 82.5%, and the film can resist the high temperature of 118 ℃.
Example 3 preparation method of plant extract modified PVC plastic film
The preparation method of the plant extract modified PVC plastic film comprises the following steps:
1. preparation of plant extract:
(1) grinding
Mixing dried rhizoma et radix Valerianae, chitin and Sargassum at a certain proportion, grinding into plant fine powder with particle size of 200-;
the mixed mass ratio of the valerian, the chitin and the seaweed is 5: 1.1: 1;
(2) by extraction of
Adding an extraction solution, and extracting in a water bath environment by using a Soxhlet extractor until the pigment is completely extracted;
the extraction solution is a mixed solution of 70% dichloromethane and water, and the dosage of the solution is 25 times of the weight of the plant fine powder;
the temperature of the water bath is 35 ℃; the extraction time is 48 h;
(3) extraction of
After extraction, concentrating the extract on a rotary evaporator, heating to 35 ℃, controlling the vacuum degree at 0.08MPa, carrying out rotary evaporation until no liquid drops flow back, adding water for dilution, adding petroleum ether for extraction, carrying out secondary extraction on a water phase, and combining extract liquor;
the water addition amount is 3 times of that of the concentrated solution; the total amount of the petroleum ether is 1.5 times of the total amount of the water phase;
(4) beating
Concentrating the petroleum ether extract to 40%, pulping at low temperature, filtering, washing, and drying to obtain plant extract powder;
pulping at low temperature of-15 deg.C at a rotation speed of 120r/min for 3 h;
the yield of the prepared plant extract accounts for 6.85 percent, and the color of the plant extract is brownish yellow;
2. preparation of functional modifier:
weighing 1.00g of plant extract and 8.00g of microcrystalline cellulose in a beaker, adding water, stirring and dissolving to form suspension with the mass concentration of 2.8%, adding 13g of montmorillonite, placing in an ultrasonic cell crusher for treatment, and treating for 30min under the condition of the power of 1000W; then adding the mixture into a high-pressure homogenizer for homogenization treatment for 10min to obtain blended sol;
injecting the blended sol into a mold, and then carrying out freeze drying under liquid nitrogen, wherein the freeze temperature is-48 ℃, the vacuum degree is 0.04mbar, and the freeze drying time is 60 hours, so as to obtain functional modifier powder;
homogenizing under 38 MPa;
3. mixing materials:
putting polyvinyl chloride resin, a functional modifier containing plant extracts and other raw materials into a mixing stirrer for mixing at the mixing speed of 600r/min for 1.5 h;
the raw materials comprise the following components in parts by weight: 80 parts of polyvinyl chloride resin, 5 parts of a functional modifier, 5 parts of SiC nano powder, 6 parts of titanium dioxide, 5 parts of dilauryl thiodipropionate, 1.5 parts of POE elastomer toughening agent, 1.5 parts of pentaerythritol and 2 parts of zinc stearate;
the SiC nano powder has the average particle size of 75-80nm and the specific surface area of 60m2/g；
The titanium dioxide and TiO2The content was 97% by weight, and the average particle diameter was 0.26. mu.m;
4. and (3) drying:
putting the mixed raw materials into a drying oven for drying for 3h, wherein the temperature of the drying oven is 120 ℃, and the water content of the dried mixed raw materials is 0.02%;
5. shaping of
Plasticizing and blending the mixed material by a double-screw extruder, wherein the material supply section is 160-165 ℃, the compression section is 165-175 ℃, the head temperature is 180-188 ℃, and the die temperature is 178-186 ℃, and then calendering at 170-178 ℃ to obtain the polyethylene plastic film product.
The plant extract modified PVC plastic film prepared by the technical scheme of the embodiment 3 has the advantages of tensile strength of 25.5MPa, elongation at break of 755 percent and excellent mechanical property; the PVC plastic film has the plant antibacterial effect, and the bacteriostasis rate to common staphylococcus aureus, escherichia coli and candida albicans can reach 98.5 percent; by adopting the method, the total migration rate of the additives in the plastic is only 2.0 mg/kg; in addition, the air permeability of the plastic film is 2795cm3/（cm2KPa.24 h), the haze of the film is 22%, the light transmittance is 81.2%, and the film can resist the high temperature of 116 ℃.
The above examples are only preferred examples and are not limited to the above listed kinds of plant extracts.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The preparation method of the plant extract modified PVC plastic film is characterized in that the content of the plant extract in the PVC plastic film is 0.1-5%.
2. The method according to claim 1, wherein the plant extract is one or more selected from the group consisting of an artemisia argyi extract, an sarcandra glabra extract, a lavender extract, a valerian extract and a seaweed extract, or one or more selected from the group consisting of quercetin, salicylic acid, emodin, menthol, menthone, hyperoside, fumaric acid, linalool, caffeic acid, calcium alginate and sodium alginate.
3. The preparation method of the plant extract modified PVC plastic film as claimed in claim 1, wherein the preparation method comprises the steps of preparation of plant extract, preparation of functional modifier, mixing, drying and forming; the preparation of the functional modifier comprises the steps of mixing the plant extract with microcrystalline cellulose, adding montmorillonite, carrying out ultrasonic cell pulverization under 800-1200W, homogenizing at 35-38MPa, and freeze-drying under liquid nitrogen at-48 deg.C under vacuum degree of 0.03-0.04mbar for 48-60 h;
the preparation of the functional modifier comprises the following steps of preparing a plant extract, microcrystalline cellulose and montmorillonite in a mass ratio of 1: 5-8: 12-13.
4. The preparation method according to claim 3, wherein the preparation of the plant extract comprises the steps of grinding, extracting and pulping; and in the grinding step, the mixed mass ratio of the valerian, the chitin and the seaweed is 3-5: 0.5-1.1: 1; the grain diameter is 50-300 μm.
5. The preparation method of claim 4, wherein the extraction solution is a mixed solution of 60-70% dichloromethane and water, and the amount of the solution is 20-25 times of the weight of the plant fine powder.
6. The preparation method according to claim 4, wherein the extraction comprises concentrating the extractive solution on a rotary evaporator, diluting with water, and extracting with petroleum ether; the water adding amount is 2-3 times of the concentrated solution; the total amount of the petroleum ether is 1-1.5 times of the total amount of the water phase; the pulping is carried out at the temperature of minus 30 to minus 15 ℃, the rotating speed of 120 ℃ for 150r/min and the pulping time of 3 to 5 hours.
7. The preparation method of claim 3, wherein the mixed material comprises the following raw materials in parts by weight: 65-80 parts of polyvinyl chloride resin, 0.5-5 parts of functional modifier, 3-5 parts of SiC nano powder, 4-6 parts of titanium dioxide, 3-5 parts of dilauryl thiodipropionate, 0.5-1.5 parts of POE elastomer toughening agent, 1.1-1.5 parts of pentaerythritol and 1.5-2 parts of zinc stearate.
8. The method according to claim 7, wherein the mixed material, the SiC nanopowder, has an average particle diameter of 50-80nm and a specific surface area of 55-60m2(ii)/g; the titanium dioxide and TiO295-97wt% of the total weight of the powder, and 0.20-0.26 μm of the average particle size.
9. The method of claim 3, wherein the drying is carried out to a moisture content of 0.05% or less.
10. The preparation method as claimed in claim 3, wherein the molding is carried out by calendering at the temperature of 170-178 ℃ after the temperature of the feeding section of the twin-screw extruder is 160-165 ℃, the temperature of the compression section is 165-175 ℃, the temperature of the head is 180-188 ℃, and the temperature of the die is 178-186 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911420598.9A CN111073181A (en) | 2019-12-31 | 2019-12-31 | Preparation method of plant extract modified PVC plastic film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911420598.9A CN111073181A (en) | 2019-12-31 | 2019-12-31 | Preparation method of plant extract modified PVC plastic film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111073181A true CN111073181A (en) | 2020-04-28 |
Family
ID=70321196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911420598.9A Withdrawn CN111073181A (en) | 2019-12-31 | 2019-12-31 | Preparation method of plant extract modified PVC plastic film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111073181A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113173310A (en) * | 2021-05-24 | 2021-07-27 | 湖北联玉新材料科技有限公司 | Degradable disposable food preservation tray |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103601953A (en) * | 2013-11-08 | 2014-02-26 | 苏州新颖新材料科技股份有限公司 | Plant-source bacteriostatic composite thin film and preparation method thereof |
| CN104371169A (en) * | 2014-11-06 | 2015-02-25 | 江苏华科塑业有限公司 | Antibacterial polyethylene film |
| CN108794920A (en) * | 2018-05-22 | 2018-11-13 | 佛山市高明区生产力促进中心 | A kind of pure and fresh PVC film of environmental protection |
-
2019
- 2019-12-31 CN CN201911420598.9A patent/CN111073181A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103601953A (en) * | 2013-11-08 | 2014-02-26 | 苏州新颖新材料科技股份有限公司 | Plant-source bacteriostatic composite thin film and preparation method thereof |
| CN104371169A (en) * | 2014-11-06 | 2015-02-25 | 江苏华科塑业有限公司 | Antibacterial polyethylene film |
| CN108794920A (en) * | 2018-05-22 | 2018-11-13 | 佛山市高明区生产力促进中心 | A kind of pure and fresh PVC film of environmental protection |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113173310A (en) * | 2021-05-24 | 2021-07-27 | 湖北联玉新材料科技有限公司 | Degradable disposable food preservation tray |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102240815A (en) | Method for preparing nano silver particles by using plant extract for reduction, and application of method | |
| CN103493702B (en) | Antibacterial fresh-keeping juicy peach growth bag and manufacturing method thereof | |
| CN101817939A (en) | Venting, self-cleaning and degradable environmental-friendly preservative film and preparation method thereof | |
| CN104305450B (en) | A kind of siberian solomonseal beverage and new process for producing thereof | |
| CN104987040A (en) | Ceramic vessel capable of activating water molecules and preparation method of ceramic vessel | |
| CN103146036A (en) | High-strength and high-antibacterial property sodium alginate film for food packaging and preparation method thereof | |
| CN109280269A (en) | A kind of preparation method of natural antibacterial deodorization PP crisper | |
| CN111073181A (en) | Preparation method of plant extract modified PVC plastic film | |
| CN105800103B (en) | Active packing material, preparation method and application thereof | |
| CN107970133B (en) | Preparation method of antibacterial toothpaste, product and application thereof | |
| CN103539966A (en) | Biological nano plastic | |
| KR101877020B1 (en) | A sustained release complex nanoparticle containing natural antimicrobial substance and method of producing the same | |
| CN112458564A (en) | Lyocell fiber containing wormwood/radix isatidis/tea extract and preparation method thereof | |
| CN103483850A (en) | Biodegradable plastic | |
| CN106188774A (en) | Polyethylene coating materials that a kind of nanocrystal is cellulose modified and preparation method thereof | |
| CN101642424B (en) | Attapulgite pregnant woman sunscreen cream | |
| CN107151830B (en) | A kind of preparation method of the composite high-molecular fiber for high shading rate screen cloth | |
| CN107670094A (en) | A kind of environment-friendly preparation method thereof of silver-carrying nano material | |
| Gong et al. | Carbon dot/g-C3N4-mediated self-activated antimicrobial nanocomposite films for active packaging applications | |
| CN105968863A (en) | Functional wood flour composite filling material and preparation method thereof | |
| CN105778259B (en) | A kind of preparation method of the strawberry preservation film master batch containing rare earth compounding | |
| CN112409643A (en) | Mildew-proof traditional Chinese medicine beverage packaging bag and processing method thereof | |
| CN105125004A (en) | Biodegradable baby quilt with high warmth keeping property | |
| CN111068031A (en) | Antibiotic capsule and preparation method thereof | |
| CN105778258B (en) | A kind of preparation method of the banana fresh-keeping material film master batch containing rare earth compounding |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200428 |