CN112778555A - PE film packaging material and preparation method thereof - Google Patents
PE film packaging material and preparation method thereof Download PDFInfo
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- CN112778555A CN112778555A CN202110106602.5A CN202110106602A CN112778555A CN 112778555 A CN112778555 A CN 112778555A CN 202110106602 A CN202110106602 A CN 202110106602A CN 112778555 A CN112778555 A CN 112778555A
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- 239000005022 packaging material Substances 0.000 title claims abstract description 43
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 81
- XLOMVQKBTHCTTD-UHFFFAOYSA-N zinc oxide Inorganic materials [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 68
- 239000004698 Polyethylene Substances 0.000 claims abstract description 61
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000011787 zinc oxide Substances 0.000 claims abstract description 36
- 239000005543 nano-size silicon particle Substances 0.000 claims abstract description 30
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 30
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 20
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 20
- 229920005989 resin Polymers 0.000 claims abstract description 18
- 239000011347 resin Substances 0.000 claims abstract description 18
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims abstract description 7
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims abstract description 7
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims abstract description 7
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000005642 Oleic acid Substances 0.000 claims abstract description 7
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims abstract description 7
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims abstract description 7
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims abstract description 7
- 239000000243 solution Substances 0.000 claims description 34
- 238000001035 drying Methods 0.000 claims description 25
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 21
- 238000006243 chemical reaction Methods 0.000 claims description 19
- 229920000642 polymer Polymers 0.000 claims description 19
- 238000003756 stirring Methods 0.000 claims description 19
- 239000011259 mixed solution Substances 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 13
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 claims description 12
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 12
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 12
- 238000009210 therapy by ultrasound Methods 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 10
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 239000002994 raw material Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 239000000725 suspension Substances 0.000 claims description 6
- 239000004408 titanium dioxide Substances 0.000 claims description 6
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- 235000019441 ethanol Nutrition 0.000 claims description 5
- 239000000047 product Substances 0.000 claims description 5
- 238000005286 illumination Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 230000004048 modification Effects 0.000 claims description 4
- 238000012986 modification Methods 0.000 claims description 4
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 3
- 238000003490 calendering Methods 0.000 claims description 3
- 239000007795 chemical reaction product Substances 0.000 claims description 3
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 239000012153 distilled water Substances 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 239000003607 modifier Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 claims description 3
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 3
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 3
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 3
- 238000010992 reflux Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000010008 shearing Methods 0.000 claims description 3
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 1
- 235000013305 food Nutrition 0.000 abstract description 7
- 239000000126 substance Substances 0.000 abstract description 3
- 230000000844 anti-bacterial effect Effects 0.000 abstract description 2
- 230000004888 barrier function Effects 0.000 abstract description 2
- RNWHGQJWIACOKP-UHFFFAOYSA-N zinc;oxygen(2-) Chemical class [O-2].[Zn+2] RNWHGQJWIACOKP-UHFFFAOYSA-N 0.000 abstract description 2
- 229920003023 plastic Polymers 0.000 description 6
- 239000004033 plastic Substances 0.000 description 6
- 239000002985 plastic film Substances 0.000 description 4
- 229920006255 plastic film Polymers 0.000 description 4
- 230000036541 health Effects 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 235000013410 fast food Nutrition 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000036512 infertility Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- 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
- C08J2429/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
- C08J2429/02—Homopolymers or copolymers of unsaturated alcohols
- C08J2429/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2471/00—Characterised by the use of polyethers obtained by reactions forming an ether link in the main chain; Derivatives of such polymers
- C08J2471/02—Polyalkylene oxides
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/06—Pretreated ingredients and ingredients covered by the main groups C08K3/00 - C08K7/00
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- 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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- 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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- 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
- C08K3/36—Silica
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
- C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
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Abstract
The invention belongs to the technical field of packaging material preparation, and discloses a PE film packaging material and a preparation method thereof, wherein the PE film packaging material comprises, by mass, 60-90 parts of PE resin, 30-35 parts of polyvinyl alcohol, 6-9 parts of polyethylene oxide, 12-15 parts of glycerol, 3-8 parts of modified nano-silica, 1-3 parts of nano-titanium dioxide, 4-6 parts of nano-zinc oxide and 5-12 parts of oleic acid. According to the invention, the gas barrier property and the safety of the packaging material are improved by adding polyvinyl alcohol, and the heating degradability is better; modified nano silicon dioxide and modified zinc oxide are added into the packaging material, so that the chemical stability is better, the use safety is better, the antibacterial property of the packaging material can be improved, and the overall performance of the PE film packaging material is optimized. The preparation method of the PE film packaging material is simple, and the prepared PE film packaging material has better performance and better meets the food safety requirement.
Description
Technical Field
The invention belongs to the technical field of packaging material preparation, and particularly relates to a PE film packaging material and a preparation method thereof.
Background
At present: plastic packages and plastic package products have a larger share in the market, and particularly, composite plastic flexible packages are widely applied to the fields of food, medicine, chemical industry and the like, wherein the proportion of the plastic packages is the largest, such as beverage packages, quick-frozen food packages, steamed and cooked food packages, fast food packages and the like, and the plastic packages and the plastic package products bring great convenience to the life of people. The plastic film material has poor stability, can be aged and decomposed under the action of heat and illumination, has reduced mechanical strength, and can affect the health of human bodies after being used for food packaging for a long time, and can not meet the requirement of sterility, thus limiting the application range of the plastic film material.
Through the above analysis, the problems and defects of the prior art are as follows: the plastic film material has poor stability, aging decomposition and mechanical strength which can not meet the food packaging requirement, and the long-term use of the plastic film material can affect the human health and can not meet the aseptic requirement.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a PE film packaging material and a preparation method thereof.
The invention is realized in such a way that the preparation method of the PE film packaging material comprises the following steps:
weighing PE resin and polyvinyl alcohol according to parts by weight, and respectively placing the weighed PE resin and polyvinyl alcohol in a drying oven for drying;
placing the dried PE resin and the dried polyvinyl alcohol into a reaction kettle, adding polyethylene oxide and oleic acid, uniformly stirring, closing the reaction kettle, and reacting to obtain a polymer;
step three, preparing nano silicon dioxide and modifying the nano silicon dioxide to obtain modified nano silicon dioxide; preparing nano zinc oxide and modifying the nano zinc oxide to obtain modified nano zinc oxide;
the modified nano silicon dioxide obtained by modifying the nano silicon dioxide comprises the following steps:
(3.1) selecting gamma-aminopropyl triethoxysilane as a modifier;
(3.2) dissolving gamma-aminopropyltriethoxysilane in an ethanol solution to obtain a gamma-aminopropyltriethoxysilane solution, and performing ultrasonic dispersion on the solution;
(3.3) adding hydrochloric acid into the gamma-aminopropyltriethoxysilane solution after ultrasonic dispersion, and adjusting the pH value to 4-5 to obtain a modified solution;
(3.4) placing the nano silicon dioxide in a modification solution, and modifying at a set temperature of 68-70 ℃ to obtain the nano silicon dioxide;
step four, preparing the nano titanium dioxide; ultrasonically dispersing modified nano silicon dioxide, modified nano zinc oxide and nano titanium dioxide in deionized water to obtain a nano mixture;
adding the nano mixture into the polymer, fully stirring, and adding glycerol to obtain a PE film raw material;
adding the nano mixture into the polymer, fully stirring and adding glycerol, wherein the nano mixture comprises the following components:
(5.1) uniformly stirring the polymer, heating to 110-115 ℃, and keeping the temperature until the solid is completely dissolved to obtain a liquid polymer;
(5.2) adding the nano mixture into the liquid polymer to obtain nano sol;
(5.3) carrying out ultrasonic treatment on the nano sol, wherein the ultrasonic frequency is 20-30kHz, and the ultrasonic time is 10-15 min;
(5.4) continuing to perform ultrasonic treatment until the nano system is completely dispersed, and adding glycerol to obtain a PE film raw material;
putting the PE film raw material into a double-screw extruder, and fully fusing the material under the shearing, mixing and conveying of a screw to obtain a fused material; and melting the fused material, extruding, granulating, and performing calendaring molding to obtain the PE film packaging material.
Further, in the step one, the step of respectively placing the weighed PE resin and polyvinyl alcohol in a drying oven for drying comprises: the PE resin is dried at a set temperature of 60-72 ℃, and the polyvinyl alcohol is dried at a set temperature of 65-70 ℃.
Further, in the second step, the reaction temperature is set to be 120-130 ℃, the pressure is 0.3-0.4MPa, and the reaction time is 0.8-1 h.
Further, in the third step, the preparation of nano silica includes:
(1) tetraethyl orthosilicate, absolute ethyl alcohol and distilled water are mixed to obtain a mixed solution;
(2) dripping hydrochloric acid into the mixed solution, and stirring to obtain silicon dioxide sol;
(3) dripping absolute ethyl alcohol solution into the silica sol, and reacting at constant temperature to obtain nano silica dispersion;
(4) centrifuging the nano silicon dioxide dispersion liquid, washing and drying a centrifugal product to obtain nano silicon dioxide;
further, in the step (4), the drying temperature is 65-73 ℃, and the drying time is 3-5 h.
Further, in the third step, the modifying the nano zinc oxide to obtain the modified nano zinc oxide includes:
1) weighing nano zinc oxide in an acetone solution containing KH750, and uniformly stirring to obtain a mixed solution;
2) setting the ultrasonic frequency at 50-60kHz and the ultrasonic time at 20-25min, and carrying out ultrasonic treatment on the mixed solution;
3) setting the temperature to be 58-65 ℃ to carry out secondary ultrasonic treatment on the mixed solution to obtain a modified nano zinc oxide solution;
4) and (3) placing the nano zinc oxide solution in a drying box for drying and grinding to obtain the modified nano zinc oxide.
Further, in the step (3.2), the mass concentration of the ethanol solution is 65%.
Further, in the fourth step, the preparation of the nano titanium dioxide comprises:
(1) carrying out sealing reaction on polyvinylpyrrolidone and n-butyl titanate, and carrying out water bath ultrasonic reaction on a reaction product to obtain titanium dioxide gel;
(2) adding n-heptane into titanium dioxide gel for heating reflux reaction to obtain suspension;
(3) and (4) carrying out micro-current and illumination treatment on the suspension to obtain the nano titanium dioxide.
Further, in the sixth step, the melting temperature is 130-160 ℃.
The invention also aims to provide the PE film packaging material prepared by the preparation method of the PE film packaging material, wherein the PE film packaging material comprises, by mass, 60-90 parts of PE resin, 30-35 parts of polyvinyl alcohol, 6-9 parts of polyethylene oxide, 12-15 parts of glycerol, 3-8 parts of modified nano-silica, 1-3 parts of nano-titanium dioxide, 4-6 parts of nano-zinc oxide and 5-12 parts of oleic acid.
By combining all the technical schemes, the invention has the advantages and positive effects that: according to the invention, the gas barrier property and the safety of the packaging material are improved by adding polyvinyl alcohol, and the heating degradability is better; modified nano silicon dioxide and modified zinc oxide are added into the packaging material, so that the chemical stability is better, the use safety is better, the antibacterial property of the packaging material can be improved, and the overall performance of the PE film packaging material is optimized. The preparation method of the PE film packaging material is simple, and the prepared PE film packaging material has better performance and better meets the requirement of food safety.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained from the drawings without creative efforts.
FIG. 1 is a flow chart of a method for preparing a PE film packaging material according to an embodiment of the invention.
Fig. 2 is a flow chart for performing the preparation of nano-silica according to the embodiment of the present invention.
Fig. 3 is a flowchart of modifying nano-silica to obtain modified nano-silica according to an embodiment of the present invention.
Fig. 4 is a flow chart of modifying nano zinc oxide to obtain modified nano zinc oxide according to an embodiment of the present invention.
FIG. 5 is a flow chart of adding the nano-mixture to the polymer, followed by adding glycerol after stirring thoroughly, according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Aiming at the problems in the prior art, the invention provides a PE film packaging material and a preparation method thereof, and the invention is described in detail below with reference to the accompanying drawings.
The PE film packaging material provided by the embodiment of the invention comprises, by mass, 60-90 parts of PE resin, 30-35 parts of polyvinyl alcohol, 6-9 parts of polyethylene oxide, 12-15 parts of glycerol, 3-8 parts of modified nano-silica, 1-3 parts of nano-titanium dioxide, 4-6 parts of nano-zinc oxide and 5-12 parts of oleic acid.
As shown in fig. 1, a method for preparing a PE film packaging material according to an embodiment of the present invention includes the following steps:
s101, weighing PE resin and polyvinyl alcohol according to parts by weight, respectively placing the PE resin and the polyvinyl alcohol in a drying box, and drying the PE resin at a set temperature of 60-72 ℃ and the polyvinyl alcohol at a set temperature of 65-70 ℃;
s102, placing the dried PE resin and the dried polyvinyl alcohol into a reaction kettle, adding polyethylene oxide and oleic acid, uniformly stirring, closing the reaction kettle, and reacting to obtain a polymer;
s103, preparing nano silicon dioxide and modifying the nano silicon dioxide to obtain modified nano silicon dioxide; preparing nano zinc oxide and modifying the nano zinc oxide to obtain modified nano zinc oxide;
s104, preparing the nano titanium dioxide; ultrasonically dispersing modified nano silicon dioxide, modified nano zinc oxide and nano titanium dioxide in deionized water to obtain a nano mixture;
s105, adding the nano mixture into the polymer, fully stirring, and adding glycerol to obtain a PE film raw material;
s106, placing the PE film raw material into a double-screw extruder, and fully fusing the material under the shearing, mixing and conveying of a screw to obtain a fused material; and melting the fused material, extruding, granulating, and performing calendaring molding to obtain the PE film packaging material.
In step S102, in the reaction provided by the embodiment of the present invention, the reaction temperature is set to 120-130 ℃, the pressure is set to 0.3-0.4MPa, and the reaction time is set to 0.8-1 h.
As shown in fig. 2, in step S103, the preparation of nano-silica according to the embodiment of the present invention includes:
s201, mixing tetraethyl orthosilicate, absolute ethyl alcohol and distilled water to obtain a mixed solution;
s202, dripping hydrochloric acid into the mixed solution, and stirring to obtain silicon dioxide sol;
s203, dripping the absolute ethyl alcohol solution into the silica sol, and reacting at constant temperature to obtain nano silica dispersion liquid;
and S204, centrifuging the nano silicon dioxide dispersion liquid, washing and drying a centrifugal product to obtain the nano silicon dioxide.
In step S204, the drying temperature provided by the embodiment of the invention is 65-73 ℃, and the drying time is 3-5 h.
As shown in fig. 3, in step S103, the modifying the nano-silica to obtain the modified nano-silica according to the embodiment of the present invention includes:
s301, selecting gamma-aminopropyl triethoxysilane as a modifier;
s302, dissolving gamma-aminopropyltriethoxysilane in an ethanol solution with the mass concentration of 65% to obtain a gamma-aminopropyltriethoxysilane solution, and performing ultrasonic dispersion on the solution;
s303, adding hydrochloric acid into the gamma-aminopropyltriethoxysilane solution subjected to ultrasonic dispersion, and adjusting the pH value to 4-5 to obtain a modified solution;
s304, placing the nano silicon dioxide in a modification solution, and modifying at a set temperature of 68-70 ℃ to obtain the nano silicon dioxide.
As shown in fig. 4, in step S103, the modifying the nano zinc oxide to obtain the modified nano zinc oxide provided by the embodiment of the present invention includes:
s401, weighing nano zinc oxide into an acetone solution containing KH750, and uniformly stirring to obtain a mixed solution;
s402, setting the ultrasonic frequency to be 50-60kHz and the ultrasonic time to be 20-25min, and carrying out ultrasonic treatment on the mixed solution;
s403, setting the temperature to be 58-65 ℃ to perform secondary ultrasonic treatment on the mixed solution to obtain a modified nano zinc oxide solution;
s404, placing the nano zinc oxide solution in a drying box for drying and grinding to obtain the modified nano zinc oxide.
In step S104, the preparation of the nano titanium dioxide provided by the embodiment of the present invention includes:
carrying out sealing reaction on polyvinylpyrrolidone and n-butyl titanate, and carrying out water bath ultrasonic reaction on a reaction product to obtain titanium dioxide gel;
adding n-heptane into titanium dioxide gel for heating reflux reaction to obtain suspension;
and (4) carrying out micro-current and illumination treatment on the suspension to obtain the nano titanium dioxide.
As shown in fig. 5, in step S105, adding the nano mixture into the polymer, fully stirring, and adding glycerol, according to the embodiment of the present invention, includes:
s501, uniformly stirring the polymer, heating to 110-115 ℃, and preserving the temperature until the solid is completely dissolved to obtain a liquid polymer;
s502, adding a nano mixture into the liquid polymer to obtain nano sol;
s503, carrying out ultrasonic treatment on the nano sol, wherein the ultrasonic frequency is 20-30kHz, and the ultrasonic time is 10-15 min;
and S504, continuing to perform ultrasonic treatment until the nano system is completely dispersed, and adding glycerol to obtain the PE film raw material.
In step S106, the melting temperature provided by the embodiment of the present invention is 130-160 ℃.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, and any modification, equivalent replacement, and improvement made by those skilled in the art within the technical scope of the present invention disclosed herein, which is within the spirit and principle of the present invention, should be covered by the present invention.
Claims (10)
1. A preparation method of PE film packaging material is characterized by comprising the following steps:
weighing PE resin and polyvinyl alcohol according to parts by weight, and respectively placing the weighed PE resin and polyvinyl alcohol in a drying oven for drying;
placing the dried PE resin and the dried polyvinyl alcohol into a reaction kettle, adding polyethylene oxide and oleic acid, uniformly stirring, closing the reaction kettle, and reacting to obtain a polymer;
step three, preparing nano silicon dioxide and modifying the nano silicon dioxide to obtain modified nano silicon dioxide; preparing nano zinc oxide and modifying the nano zinc oxide to obtain modified nano zinc oxide;
the modified nano silicon dioxide obtained by modifying the nano silicon dioxide comprises the following steps:
(3.1) selecting gamma-aminopropyl triethoxysilane as a modifier;
(3.2) dissolving gamma-aminopropyltriethoxysilane in an ethanol solution to obtain a gamma-aminopropyltriethoxysilane solution, and performing ultrasonic dispersion on the solution;
(3.3) adding hydrochloric acid into the gamma-aminopropyltriethoxysilane solution after ultrasonic dispersion, and adjusting the pH value to 4-5 to obtain a modified solution;
(3.4) placing the nano silicon dioxide in a modification solution, and modifying at a set temperature of 68-70 ℃ to obtain the nano silicon dioxide;
step four, preparing the nano titanium dioxide; ultrasonically dispersing modified nano silicon dioxide, modified nano zinc oxide and nano titanium dioxide in deionized water to obtain a nano mixture;
adding the nano mixture into the polymer, fully stirring, and adding glycerol to obtain a PE film raw material;
adding the nano mixture into the polymer, fully stirring and adding glycerol, wherein the nano mixture comprises the following components:
(5.1) uniformly stirring the polymer, heating to 110-115 ℃, and keeping the temperature until the solid is completely dissolved to obtain a liquid polymer;
(5.2) adding the nano mixture into the liquid polymer to obtain nano sol;
(5.3) carrying out ultrasonic treatment on the nano sol, wherein the ultrasonic frequency is 20-30kHz, and the ultrasonic time is 10-15 min;
(5.4) continuing to perform ultrasonic treatment until the nano system is completely dispersed, and adding glycerol to obtain a PE film raw material;
putting the PE film raw material into a double-screw extruder, and fully fusing the material under the shearing, mixing and conveying of a screw to obtain a fused material; and melting the fused material, extruding, granulating, and performing calendaring molding to obtain the PE film packaging material.
2. The method for preparing the PE film packaging material as claimed in claim 1, wherein in the step one, the step of respectively placing the weighed PE resin and the weighed polyvinyl alcohol in a drying oven for drying comprises the following steps: the PE resin is dried at a set temperature of 60-72 ℃, and the polyvinyl alcohol is dried at a set temperature of 65-70 ℃.
3. The method for preparing the PE film packaging material as claimed in claim 1, wherein in the second step, the reaction temperature is set to 120-130 ℃, the pressure is set to 0.3-0.4MPa, and the reaction time is set to 0.8-1 h.
4. The method for preparing the PE film packaging material as claimed in claim 1, wherein in the third step, the preparation of the nano silica is carried out, and comprises the following steps:
(1) tetraethyl orthosilicate, absolute ethyl alcohol and distilled water are mixed to obtain a mixed solution;
(2) dripping hydrochloric acid into the mixed solution, and stirring to obtain silicon dioxide sol;
(3) dripping absolute ethyl alcohol solution into the silica sol, and reacting at constant temperature to obtain nano silica dispersion;
(4) and centrifuging the nano silicon dioxide dispersion liquid, washing and drying a centrifugal product to obtain the nano silicon dioxide.
5. The process for preparing PE film packaging material according to claim 4, wherein in the step (4), the drying temperature is 65-73 ℃ and the drying time is 3-5 h.
6. The method for preparing the PE film packaging material as claimed in claim 1, wherein in the third step, the step of modifying the nano zinc oxide to obtain the modified nano zinc oxide comprises the following steps:
1) weighing nano zinc oxide in an acetone solution containing KH750, and uniformly stirring to obtain a mixed solution;
2) setting the ultrasonic frequency at 50-60kHz and the ultrasonic time at 20-25min, and carrying out ultrasonic treatment on the mixed solution;
3) setting the temperature to be 58-65 ℃ to carry out secondary ultrasonic treatment on the mixed solution to obtain a modified nano zinc oxide solution;
4) and (3) placing the nano zinc oxide solution in a drying box for drying and grinding to obtain the modified nano zinc oxide.
7. The process for producing a PE film packaging material according to claim 1, wherein in the step (3.2), the ethanol solution is contained at a concentration of 65% by mass.
8. The method for preparing the PE film packaging material as claimed in claim 1, wherein in the fourth step, the preparation of the nano titanium dioxide is carried out, and comprises the following steps:
(1) carrying out sealing reaction on polyvinylpyrrolidone and n-butyl titanate, and carrying out water bath ultrasonic reaction on a reaction product to obtain titanium dioxide gel;
(2) adding n-heptane into titanium dioxide gel for heating reflux reaction to obtain suspension;
(3) and (4) carrying out micro-current and illumination treatment on the suspension to obtain the nano titanium dioxide.
9. The method for preparing the PE film packaging material as claimed in claim 1, wherein in the sixth step, the melting temperature is 130-160 ℃.
10. The PE film packaging material prepared by the preparation method of the PE film packaging material according to the claims 1-9, wherein the PE film packaging material comprises, by mass, 60-90 parts of PE resin, 30-35 parts of polyvinyl alcohol, 6-9 parts of polyethylene oxide, 12-15 parts of glycerol, 3-8 parts of modified nano-silica, 1-3 parts of nano-titanium dioxide, 4-6 parts of nano-zinc oxide and 5-12 parts of oleic acid.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104130484A (en) * | 2014-06-27 | 2014-11-05 | 苏州市盛百威包装设备有限公司 | PE film packaging material and preparation method thereof |
| CN108102194A (en) * | 2017-12-27 | 2018-06-01 | 湖南辰砾新材料有限公司 | A kind of PE film packing materials and preparation method thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104130484A (en) * | 2014-06-27 | 2014-11-05 | 苏州市盛百威包装设备有限公司 | PE film packaging material and preparation method thereof |
| CN108102194A (en) * | 2017-12-27 | 2018-06-01 | 湖南辰砾新材料有限公司 | A kind of PE film packing materials and preparation method thereof |
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