CN108752718B - Wood-plastic film for blocking printing ink and preparation method thereof - Google Patents
Wood-plastic film for blocking printing ink and preparation method thereof Download PDFInfo
- Publication number
- CN108752718B CN108752718B CN201810723013.XA CN201810723013A CN108752718B CN 108752718 B CN108752718 B CN 108752718B CN 201810723013 A CN201810723013 A CN 201810723013A CN 108752718 B CN108752718 B CN 108752718B
- Authority
- CN
- China
- Prior art keywords
- wood
- plastic film
- titanium dioxide
- nano titanium
- anatase type
- 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.)
- Active
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
- 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
-
- 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
- C08J2401/04—Oxycellulose; Hydrocellulose
-
- 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
- C08J2403/00—Characterised by the use of starch, amylose or amylopectin or of their derivatives or degradation products
- C08J2403/02—Starch; Degradation products thereof, e.g. dextrin
-
- 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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- 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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
-
- 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
-
- 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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/16—Solid spheres
- C08K7/18—Solid spheres inorganic
Abstract
The invention relates to the technical field of food packaging materials, in particular to a wood-plastic film for blocking printing ink and a preparation method thereof, wherein the wood-plastic film comprises the following components: the photosensitive fiber consists of anatase type nano titanium dioxide and microcrystalline cellulose loaded with the anatase type nano titanium dioxide. The anatase type nano titanium dioxide adopted by the invention has huge specific surface area and small size effect, so that the anatase type nano titanium dioxide has better photocatalytic degradation effect and can endow wood-plastic film with the characteristic of photodegradation, the formed wood-plastic film has uniform mechanical property, the MOAH is still easy to diffuse in the microcrystalline cellulose, and the anatase type nano titanium dioxide uniformly distributed on the microcrystalline cellulose can reduce the direct contact between organic matters, so that the diffusion of the MOAH in the organic matters is hindered, and the mobility of the MOAH in the wood-plastic film is extremely low.
Description
Technical Field
The invention relates to the technical field of food packaging materials, in particular to a wood-plastic film for blocking printing ink and a preparation method thereof.
Background
Aromatic hydrocarbon Mineral Oil (MOAH) is a carcinogenic, mutagenic substance and is commonly found in wrapping papers based on secondary fibres, especially containing printing inks. The results of the eu food safety agency's survey have confirmed that: during the storage or transportation of the food, the MOAH in the food package or the outer wrapper permeates through the inner wrapper into the gas phase and migrates to the surface/inside of the food after only 2-3 months or less. It is estimated that the MOAH migration rate in the wrapper into the food product will reach 65% -85% if the shelf life of the food product is approached. In addition, due to the semi-volatility and lipophilicity of MOAH, the use of inner packages such as polyethylene, polypropylene/composite acrylate coatings, in addition to aluminum foil packages, cannot serve to block the migration of MOAH to food, and the use of plastic products increases the migration risk of certain components (e.g., polyolefin oligomer saturated hydrocarbons). Therefore, even if the secondary packaging paper is not in direct contact with food, the MOAH in the secondary packaging paper can migrate to the packaged food through the processes of adsorption, desorption, permeation and the like among the interlayers, so that the MOAH further threatens the physical health of eaters, and the plastic products are generally difficult to degrade and are not beneficial to protecting the environment. Therefore, in order to protect the packaged food from MOAH contamination, it is of considerable interest to develop functional films that can replace the currently common plastic barrier layers, but currently there is very little research concerning this.
Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the invention aims to provide a wood-plastic film for blocking printing ink, which has good blocking property to MOAH and has high-efficiency light/biological degradability; the invention also aims to provide a preparation method of the wood-plastic film, which is simple and efficient and is beneficial to industrial popularization.
The purpose of the invention is realized by the following technical scheme:
a wood-plastic film for blocking printing ink comprises the following raw materials in parts by weight:
PE 100 parts
20-30 parts of starch
10-20 parts of nano carbon spheres
20-40 parts of photosensitive fiber
10-20 parts of talcum powder
1-3 parts of lubricant
The photosensitive fiber consists of anatase type nano titanium dioxide and microcrystalline cellulose loaded with the anatase type nano titanium dioxide.
The anatase type nano titanium dioxide adopted by the invention has large specific surface area and small size effect, so that the anatase type nano titanium dioxide has better photocatalytic degradation effect and can endow wood-plastic film with the characteristic of photodegradation; meanwhile, in order to solve the problem that the anatase nano titanium dioxide is easy to agglomerate, the anatase nano titanium dioxide is loaded on the microcrystalline cellulose, so that the dispersibility of the anatase nano titanium dioxide is greatly improved, the formed wood-plastic film is uniform in mechanical property, the MOAH is still easy to diffuse in the microcrystalline cellulose, the anatase nano titanium dioxide uniformly distributed on the microcrystalline cellulose can reduce the direct contact between organic matters, and the diffusion of the MOAH in the organic matters is hindered, so that the mobility of the MOAH in the wood-plastic film is extremely low.
In addition, the invention also adds proper amount of starch into the PE composition to endow the PE composition with biodegradability, and adds proper amount of carbon nanospheres and talcum powder to reduce the specific gravity of the high polymer material, thereby accelerating the degradation efficiency.
The preparation method of the photosensitive fiber comprises the following steps: adding anatase type nano titanium dioxide and microcrystalline cellulose into deionized water, performing ultrasonic dispersion for 2-4h, performing centrifugal washing, and drying to obtain the photosensitive fiber, wherein the mass ratio of the anatase type nano titanium dioxide to the microcrystalline cellulose to the deionized water is 1:6-10: 100.
Wherein the microcrystalline cellulose has a particle size distribution D50 of 60-100 μm, a crystallinity of 74.25-78.63% measured by X-ray diffraction, and a BET specific surface area of 84-119m2(ii) in terms of/g. MOAH is more easily diffused in an amorphous region of microcrystalline cellulose, but the microcrystalline cellulose has high crystallinity, so that the compatibility of the microcrystalline cellulose and raw materials such as PE is poor, and therefore, the mobility of the MOAH can be effectively reduced and the mechanical strength of the wood-plastic film can be improved by controlling the crystallinity of the microcrystalline cellulose to be 74.25-78.63%.
Wherein the average grain diameter of the anatase type nano titanium dioxide is 34-64 nm. Further limiting the grain size distribution, the specific surface area and the grain size of the anatase type nano titanium dioxide, which is beneficial to the uniform distribution of the anatase type nano titanium dioxide on the microcrystalline cellulose.
The preparation method of the nano carbon spheres comprises the following steps: taking bamboo fiber powder, carrying out pre-carbonization treatment in an inert gas atmosphere to obtain a carbon precursor, cooling the carbon precursor to room temperature, soaking the carbon precursor in 6-10% potassium hydroxide aqueous solution for 0.5-1.5h, taking out the carbon precursor, carrying out freeze drying, and then placing the freeze-dried carbon precursor in the inert gas atmosphere for activation treatment to obtain the carbon nanosphere.
According to the invention, the bamboo fiber is used as the raw material of the carbon nanospheres, so that no harmful substances are left in the production process, and the produced carbon nanospheres have porous property and can play a role in adsorbing MOAH, thereby being beneficial to improving the barrier property of the wood-plastic film to MOAH.
In the preparation method of the carbon nanospheres, the conditions of the pre-carbonization treatment are as follows: raising the temperature to 400-600 ℃ at the temperature rise rate of 8-10 ℃/min, and then preserving the heat for 40-70 min; the conditions of the activation treatment were: raising the temperature to 1050-. By the impregnation treatment with potassium hydroxide solution and the control of the activation conditions, a large amount of hydroxyl groups of the bagasse cellulose are exposed, and thus have a lower particle size and a higher pore volume after carbonization.
Wherein the average grain diameter of the nano carbon spheres is 76.3-92.7nm, and the average pore volume is 56.7-72.9cm3/g。
The talcum powder is composed of a first flaky talcum powder and a second flaky talcum powder according to the weight ratio of 1-2:1, the average particle size of the first flaky talcum powder is 17-29 mu m, the length-diameter ratio is 2.7-4.5:1, the average particle size of the second flaky talcum powder is 67-88 mu m, and the length-diameter ratio is 1.4-2.5: 1.
The talcum powder can be used as a lubricant and an anti-adhesion agent to form a rough and uneven structure on the surface of the wood-plastic film, so that the adhesion between the wood-plastic film and food is reduced. The invention combines the flaky talcum powder with different average particle sizes and length-diameter ratios, the first flaky talcum powder has lower particle size and higher length-diameter ratio, the melt flowability of PE can be effectively improved, the mixture and dispersion of PE and inorganic matters are facilitated, and the second flaky talcum powder has higher particle size and lower length-diameter ratio, better dispersibility in PE and benefit for the generation of rough planes of the wood-plastic film.
Wherein the lubricant is polyethylene wax.
The preparation method of the wood-plastic film for blocking the printing ink comprises the following steps: and mixing and dispersing the raw materials, performing melt extrusion granulation, and then performing a calendering method to obtain the wood-plastic film for blocking the printing ink.
The invention has the beneficial effects that:
1. the anatase type nano titanium dioxide adopted by the invention has large specific surface area and small size effect, so that the anatase type nano titanium dioxide has better photocatalytic degradation effect and can endow wood-plastic film with the characteristic of photodegradation; meanwhile, in order to solve the problem that the anatase nano titanium dioxide is easy to agglomerate, the anatase nano titanium dioxide is loaded on the microcrystalline cellulose, so that the dispersibility of the anatase nano titanium dioxide is greatly improved, the formed wood-plastic film is uniform in mechanical property, the MOAH is still easy to diffuse in the microcrystalline cellulose, and the anatase nano titanium dioxide uniformly distributed on the microcrystalline cellulose can reduce the direct contact between organic matters, so that the diffusion of the MOAH in the organic matters is hindered, and the mobility of the MOAH in the wood-plastic film is extremely low;
2. in addition, the invention also adds proper amount of starch into the PE composition to endow the PE composition with biodegradability, and adds proper amount of carbon nanospheres and talcum powder to reduce the specific gravity of the high polymer material, thereby accelerating the degradation efficiency.
Detailed Description
The present invention will be further described with reference to the following examples for facilitating understanding of those skilled in the art, and the description of the embodiments is not intended to limit the present invention.
Example 1
A wood-plastic film for blocking printing ink comprises the following raw materials in parts by weight:
PE 100 parts
25 portions of starch
15 parts of nano carbon spheres
30 parts of photosensitive fiber
15 portions of talcum powder
2 portions of lubricant
The photosensitive fiber consists of anatase type nano titanium dioxide and microcrystalline cellulose loaded with the anatase type nano titanium dioxide.
The preparation method of the photosensitive fiber comprises the following steps: adding anatase type nano titanium dioxide and microcrystalline cellulose into deionized water, performing ultrasonic dispersion for 3 hours, centrifugally washing, and drying to obtain the photosensitive fiber, wherein the mass ratio of the anatase type nano titanium dioxide to the microcrystalline cellulose to the deionized water is 1:8: 100.
Wherein the microcrystalline cellulose has a particle size distribution D50 of 80 μm, a crystallinity by X-ray diffraction measurement of 76.41%, and a BET specific surface area of 102 m2/g
Wherein the average grain diameter of the anatase type nano titanium dioxide is 49 nm.
The preparation method of the nano carbon spheres comprises the following steps: taking bamboo fiber powder, carrying out pre-carbonization treatment in an inert gas atmosphere to obtain a carbon precursor, cooling the carbon precursor to room temperature, soaking the carbon precursor in 8% potassium hydroxide aqueous solution for 1h, then taking out the carbon precursor, carrying out freeze drying, and then placing the freeze-dried carbon precursor in the inert gas atmosphere for activation treatment to obtain the carbon nanosphere.
In the step B, the conditions of the pre-carbonization treatment are as follows: heating to 500 ℃ at the heating rate of 9 ℃/min, and then preserving heat for 55 min; the conditions of the activation treatment were: heating to 1170 ℃ at a heating rate of 10 ℃/min, and then preserving heat for 2h, wherein the average grain diameter of the carbon nanospheres is 84.5nm, and the average pore volume is 64.1cm3/g。
The talcum powder is composed of a first flaky talcum powder and a second flaky talcum powder according to the weight ratio of 1.5:1, the average particle size of the first flaky talcum powder is 23 micrometers, the length-diameter ratio of the first flaky talcum powder is 3.6:1, the average particle size of the second flaky talcum powder is 78 micrometers, and the length-diameter ratio of the second flaky talcum powder is 1.9: 1.
Wherein the lubricant is polyethylene wax.
The preparation method of the wood-plastic film for blocking the printing ink comprises the following steps: and mixing and dispersing the raw materials, performing melt extrusion granulation, and then performing a calendering method to obtain the wood-plastic film for blocking the printing ink.
Example 2
A wood-plastic film for blocking printing ink comprises the following raw materials in parts by weight:
PE 100 parts
20 portions of starch
10 portions of nano carbon spheres
20 parts of photosensitive fiber
10 portions of talcum powder
1 part of lubricant
The photosensitive fiber consists of anatase type nano titanium dioxide and microcrystalline cellulose loaded with the anatase type nano titanium dioxide.
The preparation method of the photosensitive fiber comprises the following steps: adding anatase type nano titanium dioxide and microcrystalline cellulose into deionized water, performing ultrasonic dispersion for 2 hours, centrifugally washing, and drying to obtain the photosensitive fiber, wherein the mass ratio of the anatase type nano titanium dioxide to the microcrystalline cellulose to the deionized water is 1:6: 100.
Wherein the microcrystalline cellulose has a particle size distribution D50 of 60 μm, a crystallinity of 74.25% as measured by X-ray diffraction, and a BET specific surface area of 84m2/g
Wherein the average grain diameter of the anatase type nano titanium dioxide is 34 nm.
The preparation method of the nano carbon spheres comprises the following steps: taking bamboo fiber powder, carrying out pre-carbonization treatment in an inert gas atmosphere to obtain a carbon precursor, cooling the carbon precursor to room temperature, soaking the carbon precursor in 6% potassium hydroxide aqueous solution for 0.5h, taking out the carbon precursor, carrying out freeze drying, and then placing the freeze-dried carbon precursor in the inert gas atmosphere for activation treatment to obtain the nano carbon spheres.
In the step B, the conditions of the pre-carbonization treatment are as follows: heating to 400 ℃ at the heating rate of 8 ℃/min, and then preserving heat for 40 min; the conditions of the activation treatment were: heating to 1050 deg.C at a heating rate of 8 deg.C/min, and maintaining for 1h, wherein the average particle diameter of the carbon nanospheres is 76.3nm, and the average pore volume is 56.7cm3/g。
The talcum powder is composed of a first flaky talcum powder and a second flaky talcum powder according to the weight ratio of 1-2:1, the average particle size of the first flaky talcum powder is 17 mu m, the length-diameter ratio is 4.5:1, the average particle size of the second flaky talcum powder is 67 mu m, and the length-diameter ratio is 2.5: 1.
Wherein the lubricant is polyethylene wax.
The preparation method of the wood-plastic film for blocking the printing ink comprises the following steps: and mixing and dispersing the raw materials, performing melt extrusion granulation, and then performing a calendering method to obtain the wood-plastic film for blocking the printing ink.
Example 3
A wood-plastic film for blocking printing ink comprises the following raw materials in parts by weight:
PE 100 parts
30 portions of starch
20 portions of nano carbon spheres
40 parts of photosensitive fiber
20 portions of talcum powder
3 portions of lubricant
The photosensitive fiber consists of anatase type nano titanium dioxide and microcrystalline cellulose loaded with the anatase type nano titanium dioxide.
The preparation method of the photosensitive fiber comprises the following steps: adding anatase type nano titanium dioxide and microcrystalline cellulose into deionized water, performing ultrasonic dispersion for 4 hours, centrifugally washing, and drying to obtain the photosensitive fiber, wherein the mass ratio of the anatase type nano titanium dioxide to the microcrystalline cellulose to the deionized water is 1: 10: 100.
Wherein the microcrystalline cellulose has a particle size distribution D50 of 100 μm, a crystallinity measured by X-ray diffraction of 78.63%, and a BET specific surface area of 119m2/g
Wherein the average grain diameter of the anatase type nano titanium dioxide is 64 nm.
The preparation method of the nano carbon spheres comprises the following steps: taking bamboo fiber powder, carrying out pre-carbonization treatment in an inert gas atmosphere to obtain a carbon precursor, cooling the carbon precursor to room temperature, soaking the carbon precursor in a 10% potassium hydroxide aqueous solution for 1.5h, taking out the carbon precursor, carrying out freeze drying, and then placing the freeze-dried carbon precursor in the inert gas atmosphere for activation treatment to obtain the nano carbon spheres.
In the step B, the conditions of the pre-carbonization treatment are as follows: heating to 600 ℃ at the heating rate of 10 ℃/min, and then preserving heat for 70 min; the conditions of the activation treatment were: heating to 1300 ℃ at the heating rate of 12 ℃/min, and then preserving heat for 3h, wherein the average grain diameter of the carbon nanospheres is 92.7nm, and the average pore volume is 72.9cm3/g。
The talcum powder is composed of a first flaky talcum powder and a second flaky talcum powder according to the weight ratio of 1-2:1, the average particle size of the first flaky talcum powder is 29 mu m, the length-diameter ratio is 2.7:1, the average particle size of the second flaky talcum powder is 88 mu m, and the length-diameter ratio is 1.4: 1.
Wherein the lubricant is polyethylene wax.
The preparation method of the wood-plastic film for blocking the printing ink comprises the following steps: and mixing and dispersing the raw materials, performing melt extrusion granulation, and then performing a calendering method to obtain the wood-plastic film for blocking the printing ink.
Example 4
A wood-plastic film for blocking printing ink comprises the following raw materials in parts by weight:
PE 100 parts
Starch 23 parts
12 portions of nano carbon spheres
25 parts of photosensitive fiber
13 portions of talcum powder
1.5 parts of lubricant
The photosensitive fiber consists of anatase type nano titanium dioxide and microcrystalline cellulose loaded with the anatase type nano titanium dioxide.
The preparation method of the photosensitive fiber comprises the following steps: adding anatase type nano titanium dioxide and microcrystalline cellulose into deionized water, performing ultrasonic dispersion for 2.5 hours, centrifugally washing, and drying to obtain the photosensitive fiber, wherein the mass ratio of the anatase type nano titanium dioxide to the microcrystalline cellulose to the deionized water is 1:7: 100.
Wherein the microcrystalline cellulose has a particle size distribution D50 of 70 μm, a crystallinity measured by X-ray diffraction of 75.82%, and a BET specific surface area of 95m2/g
Wherein the average grain diameter of the anatase type nano titanium dioxide is 40 nm.
The preparation method of the nano carbon spheres comprises the following steps: taking bamboo fiber powder, carrying out pre-carbonization treatment in an inert gas atmosphere to obtain a carbon precursor, cooling the carbon precursor to room temperature, soaking the carbon precursor in a 7% potassium hydroxide aqueous solution for 0.8h, taking out the carbon precursor, carrying out freeze drying, and then placing the freeze-dried carbon precursor in the inert gas atmosphere for activation treatment to obtain the carbon nanosphere.
In the step B, the conditions of the pre-carbonization treatment are as follows: heating to 450 ℃ at the heating rate of 8.5 ℃/min, and then preserving heat for 50 min; the conditions of the activation treatment were: heating to 1100 deg.C at a heating rate of 9 deg.C/min, and maintaining for 1.5h, wherein the average particle diameter of the carbon nanospheres is 82.7nm, and the average pore volume is 60.4cm3/g。
The talcum powder is composed of a first flaky talcum powder and a second flaky talcum powder according to the weight ratio of 1-2:1, the average particle size of the first flaky talcum powder is 20 micrometers, the length-diameter ratio is 4:1, the average particle size of the second flaky talcum powder is 72 micrometers, and the length-diameter ratio is 2.2: 1.
Wherein the lubricant is polyethylene wax.
The preparation method of the wood-plastic film for blocking the printing ink comprises the following steps: and mixing and dispersing the raw materials, performing melt extrusion granulation, and then performing a calendering method to obtain the wood-plastic film for blocking the printing ink.
Example 5
A wood-plastic film for blocking printing ink comprises the following raw materials in parts by weight:
PE 100 parts
28 portions of starch
17 parts of nano carbon spheres
35 portions of photosensitive fiber
18 portions of talcum powder
2.5 portions of lubricant
The photosensitive fiber consists of anatase type nano titanium dioxide and microcrystalline cellulose loaded with the anatase type nano titanium dioxide.
The preparation method of the photosensitive fiber comprises the following steps: adding anatase type nano titanium dioxide and microcrystalline cellulose into deionized water, performing ultrasonic dispersion for 3.5 hours, centrifugally washing, and drying to obtain the photosensitive fiber, wherein the mass ratio of the anatase type nano titanium dioxide to the microcrystalline cellulose to the deionized water is 1:9: 100.
Wherein the microcrystalline cellulose has a particle size distribution D50 of 90 μm, a crystallinity of 77.23% by X-ray diffraction measurement, and a BET specific surface area of 108 m2/g
Wherein the average grain diameter of the anatase type nano titanium dioxide is 54 nm.
The preparation method of the nano carbon spheres comprises the following steps: taking bamboo fiber powder, carrying out pre-carbonization treatment in an inert gas atmosphere to obtain a carbon precursor, cooling the carbon precursor to room temperature, soaking the carbon precursor in a 9% potassium hydroxide aqueous solution for 1.2h, taking out the carbon precursor, carrying out freeze drying, and then placing the freeze-dried carbon precursor in the inert gas atmosphere for activation treatment to obtain the nano carbon spheres.
In the step B, the conditions of the pre-carbonization treatment are as follows: raising the temperature to 550 ℃ at the temperature rise rate of 9.5 ℃/min, and then preserving the heat for 60 min; the conditions of the activation treatment were: heating to 1200 deg.C at a heating rate of 11 deg.C/min, and maintaining for 2.5h, wherein the average particle diameter of the carbon nanospheres is 86.6nm, and the average pore volume is 70.9cm3/g。
The talcum powder is composed of a first flaky talcum powder and a second flaky talcum powder according to the weight ratio of 1.8:1, the average particle size of the first flaky talcum powder is 25 micrometers, the length-diameter ratio of the first flaky talcum powder is 3.1:1, the average particle size of the second flaky talcum powder is 80 micrometers, and the length-diameter ratio of the second flaky talcum powder is 1.8: 1.
Wherein the lubricant is polyethylene wax.
The preparation method of the wood-plastic film for blocking the printing ink comprises the following steps: and mixing and dispersing the raw materials, performing melt extrusion granulation, and then performing a calendering method to obtain the wood-plastic film for blocking the printing ink.
Comparative example 1
This comparative example is a conventional PE film on the market.
For convenience of testing, the wood-plastic films of examples 1-5 and the PE film of comparative example 1 were each controlled to have a thickness of 30-40 μm and a square shape of 5cm by 5cm, and then tested for tensile strength and elongation at break according to national standards, and for transport of MOAH according to DIN EN 14338; and carrying out an artificial natural environment degradation test and an artificial accelerated light degradation test, wherein the artificial natural environment degradation test comprises the following steps: testing the mass loss rate of the membrane after the membrane is placed in a natural environment for 120 days; manual accelerated photodegradation test: the membrane was placed at 3mw/cm2After 240 hours of uv irradiation, the film was tested for mass loss. The test results are given in the following table:
as can be seen from the above examples and comparative examples, although the conventional PE film on the market has good tensile strength and elongation at break, MOAH is liable to migrate through the PE film to contaminate food, and the degradability is also poor; the wood-plastic film disclosed by the invention can meet the requirements of packaging films although the tensile strength and the elongation at break are relatively reduced, and has good isolation effect on MOAH and excellent degradability, and the addition of talcum powder can enable the wood-plastic film to have anti-blocking property, so that the wood-plastic film has a wide application prospect in the field of food packaging.
The above-described embodiments are preferred implementations of the present invention, and the present invention may be implemented in other ways without departing from the spirit of the present invention.
Claims (8)
1. A wood plastic film for obstructing printing ink is characterized in that: the feed comprises the following raw materials in parts by weight:
PE 100 parts
20-30 parts of starch
10-20 parts of nano carbon spheres
20-40 parts of photosensitive fiber
10-20 parts of talcum powder
1-3 parts of lubricant
The photosensitive fiber consists of anatase type nano titanium dioxide and microcrystalline cellulose loaded with the anatase type nano titanium dioxide;
the preparation method of the nano carbon spheres comprises the following steps: taking bamboo fiber powder, carrying out pre-carbonization treatment in an inert gas atmosphere to obtain a carbon precursor, cooling the carbon precursor to room temperature, soaking the carbon precursor in a 6-10% potassium hydroxide aqueous solution for 0.5-1.5h, taking out the carbon precursor, carrying out freeze drying, and then placing the freeze-dried carbon precursor in the inert gas atmosphere for activation treatment to obtain a nano carbon sphere;
in the preparation method of the carbon nanosphere, the conditions of the pre-carbonization treatment are as follows: raising the temperature to 400-600 ℃ at the temperature rise rate of 8-10 ℃/min, and then preserving the heat for 40-70 min; the conditions of the activation treatment were: raising the temperature to 1050-.
2. The wood-plastic film for blocking ink of claim 1, wherein: the preparation method of the photosensitive fiber comprises the following steps: adding anatase type nano titanium dioxide and microcrystalline cellulose into deionized water, performing ultrasonic dispersion for 2-4h, performing centrifugal washing, and drying to obtain the photosensitive fiber, wherein the mass ratio of the anatase type nano titanium dioxide to the microcrystalline cellulose to the deionized water is 1:6-10: 100.
3. The wood-plastic film for blocking ink according to claim 2, wherein: the grain size of the microcrystalline celluloseDistribution D50 of 60-100 μm, crystallinity measured by X-ray diffraction of 74.25-78.63%, BET specific surface area of 84-119m2/g。
4. The wood-plastic film for blocking ink according to claim 2, wherein: the average grain diameter of the anatase type nano titanium dioxide is 34-64 nm.
5. The wood-plastic film for blocking ink of claim 1, wherein: the average grain diameter of the nano carbon spheres is 76.3-92.7nm, and the average pore volume is 56.7-72.9cm3/g。
6. The wood-plastic film for blocking ink of claim 1, wherein: the talcum powder consists of a first flaky talcum powder and a second flaky talcum powder according to the weight ratio of 1-2:1, wherein the average particle size of the first flaky talcum powder is 17-29 mu m, the length-diameter ratio is 2.7-4.5:1, the average particle size of the second flaky talcum powder is 67-88 mu m, and the length-diameter ratio is 1.4-2.5: 1.
7. The wood-plastic film for blocking ink of claim 1, wherein: the lubricant is polyethylene wax.
8. The method for preparing the wood-plastic film for blocking the printing ink according to any one of claims 1 to 7, wherein: and mixing and dispersing the raw materials, performing melt extrusion granulation, and then performing a calendering method to obtain the wood-plastic film for blocking the printing ink.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810723013.XA CN108752718B (en) | 2018-07-04 | 2018-07-04 | Wood-plastic film for blocking printing ink and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810723013.XA CN108752718B (en) | 2018-07-04 | 2018-07-04 | Wood-plastic film for blocking printing ink and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108752718A CN108752718A (en) | 2018-11-06 |
| CN108752718B true CN108752718B (en) | 2020-10-16 |
Family
ID=63975891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810723013.XA Active CN108752718B (en) | 2018-07-04 | 2018-07-04 | Wood-plastic film for blocking printing ink and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108752718B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5075153A (en) * | 1989-07-24 | 1991-12-24 | Xerox Corporation | Coated paper containing a plastic supporting substrate |
| US20070245924A1 (en) * | 2006-04-20 | 2007-10-25 | Hofmann Michael A | Reduced abrasion of titanium dioxide pigments produced from the chloride process |
| CN106632700A (en) * | 2016-12-11 | 2017-05-10 | 闫博文 | Preparation method of stable composite microcrystalline cellulose |
| CN107253382A (en) * | 2017-05-25 | 2017-10-17 | 句容市兴武包装有限公司 | A kind of paper soft packaging material by aluminum-plastic compound |
-
2018
- 2018-07-04 CN CN201810723013.XA patent/CN108752718B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108752718A (en) | 2018-11-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Liu et al. | Effects of nano-ZnO and nano-SiO2 particles on properties of PVA/xylan composite films | |
| Cao et al. | Active gum karaya/Cloisite Na+ nanocomposite films containing cinnamaldehyde | |
| CN109912876B (en) | Antibacterial microporous preservative film with high elongation at break and preparation method thereof | |
| Yu et al. | Fabrication, characterization, and antibacterial properties of citric acid crosslinked PVA electrospun microfibre mats for active food packaging | |
| US20120000392A1 (en) | Suspension of cellulose fibers and method for producing the same | |
| EP3444400B1 (en) | Barrier paper and paper cup | |
| JP2009057552A (en) | Gas barrier material | |
| Mondal et al. | Investigation on Sodium Benzoate Release from Poly (Butylene Adipate‐Co‐Terephthalate)/Organoclay/Sodium Benzoate Based Nanocomposite Film and Their Antimicrobial Activity | |
| CN108867190B (en) | Slow-release fruit and vegetable fresh-keeping paper film and preparation method and application thereof | |
| Shen et al. | Development and compatibility assessment of new composite film based on sugar beet pulp and polyvinyl alcohol intended for packaging applications | |
| Chen et al. | In situ synthesis and properties of Ag NPs/carboxymethyl cellulose/starch composite films for antibacterial application | |
| Ma et al. | Self-reinforced grease-resistant sheets produced by paper treatment with zinc chloride solution | |
| CN111945482A (en) | High-strength flame-retardant corrugated paper and preparation method thereof | |
| CN114517049B (en) | Coating liquid with high barrier property and application thereof | |
| CN108752718B (en) | Wood-plastic film for blocking printing ink and preparation method thereof | |
| JP7159196B2 (en) | packaging material | |
| Jamnongkan et al. | Effect of ZnO nanoparticles on the physical properties of PLA/PBS biocomposite films | |
| CN108948872B (en) | Method for preparing ink barrier layer by using sugarcane waste residues | |
| CN110041564A (en) | The in-situ preparation method of cellulose antibacterial film, the cellulose antibacterial film by this method preparation and its application | |
| CN113321834B (en) | Intelligent humidity-control barrier composite film and preparation method and application thereof | |
| Jena et al. | A facile approach for synthesising and studying (chitosan-g-poly vinyl alcohol)/bio-CaCO 3 fire retardant bionanocomposites | |
| CN106987016B (en) | High-freshness-retaining nano Zr/TiO2Preparation method of bimetal modified PE coating film | |
| Gao et al. | High transparency, water vapor barrier and antibacterial properties of chitosan/carboxymethyl glucan/poly (vinyl alcohol)/nanoparticles encapsulating citral composite film for fruit packaging | |
| CN108729299B (en) | Cellulose membrane for blocking printing ink and preparation method thereof | |
| Ji et al. | Optimization of spray-coated nanochitin/nanocellulose films as renewable oxygen barrier layers via thermal treatment |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |