CN113429803A - Plastic uptake box material for food and preparation method thereof - Google Patents
Plastic uptake box material for food and preparation method thereof Download PDFInfo
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- CN113429803A CN113429803A CN202110674925.4A CN202110674925A CN113429803A CN 113429803 A CN113429803 A CN 113429803A CN 202110674925 A CN202110674925 A CN 202110674925A CN 113429803 A CN113429803 A CN 113429803A
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- 239000000463 material Substances 0.000 title claims abstract description 75
- 229920003023 plastic Polymers 0.000 title claims abstract description 42
- 239000004033 plastic Substances 0.000 title claims abstract description 42
- 235000013305 food Nutrition 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title abstract description 17
- 239000010902 straw Substances 0.000 claims abstract description 42
- LYKDOWJROLHYOT-UHFFFAOYSA-N 1-(2-hydroxy-4-methylphenyl)ethanone Chemical compound CC(=O)C1=CC=C(C)C=C1O LYKDOWJROLHYOT-UHFFFAOYSA-N 0.000 claims abstract description 40
- 229920005610 lignin Polymers 0.000 claims abstract description 39
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 29
- 239000008104 plant cellulose Substances 0.000 claims abstract description 23
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 22
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 22
- CHHHXKFHOYLYRE-UHFFFAOYSA-M 2,4-Hexadienoic acid, potassium salt (1:1), (2E,4E)- Chemical compound [K+].CC=CC=CC([O-])=O CHHHXKFHOYLYRE-UHFFFAOYSA-M 0.000 claims abstract description 20
- 235000017060 Arachis glabrata Nutrition 0.000 claims abstract description 20
- 235000010777 Arachis hypogaea Nutrition 0.000 claims abstract description 20
- 235000018262 Arachis monticola Nutrition 0.000 claims abstract description 20
- 239000004698 Polyethylene Substances 0.000 claims abstract description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052742 iron Inorganic materials 0.000 claims abstract description 20
- 235000020232 peanut Nutrition 0.000 claims abstract description 20
- 229920000747 poly(lactic acid) Polymers 0.000 claims abstract description 20
- -1 polyethylene Polymers 0.000 claims abstract description 20
- 229920000573 polyethylene Polymers 0.000 claims abstract description 20
- 239000004626 polylactic acid Substances 0.000 claims abstract description 20
- 239000004302 potassium sorbate Substances 0.000 claims abstract description 20
- 229940069338 potassium sorbate Drugs 0.000 claims abstract description 20
- 235000010241 potassium sorbate Nutrition 0.000 claims abstract description 20
- 239000000843 powder Substances 0.000 claims abstract description 20
- 102000004169 proteins and genes Human genes 0.000 claims abstract description 20
- 108090000623 proteins and genes Proteins 0.000 claims abstract description 20
- 239000004952 Polyamide Substances 0.000 claims abstract description 19
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229920002647 polyamide Polymers 0.000 claims abstract description 19
- 239000002994 raw material Substances 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims description 47
- 238000001035 drying Methods 0.000 claims description 34
- 244000105624 Arachis hypogaea Species 0.000 claims description 19
- 238000001816 cooling Methods 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 17
- 238000002156 mixing Methods 0.000 claims description 13
- CWVRJTMFETXNAD-FWCWNIRPSA-N 3-O-Caffeoylquinic acid Natural products O[C@H]1[C@@H](O)C[C@@](O)(C(O)=O)C[C@H]1OC(=O)\C=C\C1=CC=C(O)C(O)=C1 CWVRJTMFETXNAD-FWCWNIRPSA-N 0.000 claims description 7
- PZIRUHCJZBGLDY-UHFFFAOYSA-N Caffeoylquinic acid Natural products CC(CCC(=O)C(C)C1C(=O)CC2C3CC(O)C4CC(O)CCC4(C)C3CCC12C)C(=O)O PZIRUHCJZBGLDY-UHFFFAOYSA-N 0.000 claims description 7
- CWVRJTMFETXNAD-KLZCAUPSSA-N Neochlorogenin-saeure Natural products O[C@H]1C[C@@](O)(C[C@@H](OC(=O)C=Cc2ccc(O)c(O)c2)[C@@H]1O)C(=O)O CWVRJTMFETXNAD-KLZCAUPSSA-N 0.000 claims description 7
- CWVRJTMFETXNAD-JUHZACGLSA-N chlorogenic acid Chemical compound O[C@@H]1[C@H](O)C[C@@](O)(C(O)=O)C[C@H]1OC(=O)\C=C\C1=CC=C(O)C(O)=C1 CWVRJTMFETXNAD-JUHZACGLSA-N 0.000 claims description 7
- 229940074393 chlorogenic acid Drugs 0.000 claims description 7
- FFQSDFBBSXGVKF-KHSQJDLVSA-N chlorogenic acid Natural products O[C@@H]1C[C@](O)(C[C@@H](CC(=O)C=Cc2ccc(O)c(O)c2)[C@@H]1O)C(=O)O FFQSDFBBSXGVKF-KHSQJDLVSA-N 0.000 claims description 7
- 235000001368 chlorogenic acid Nutrition 0.000 claims description 7
- BMRSEYFENKXDIS-KLZCAUPSSA-N cis-3-O-p-coumaroylquinic acid Natural products O[C@H]1C[C@@](O)(C[C@@H](OC(=O)C=Cc2ccc(O)cc2)[C@@H]1O)C(=O)O BMRSEYFENKXDIS-KLZCAUPSSA-N 0.000 claims description 7
- 239000011265 semifinished product Substances 0.000 claims description 7
- 230000001954 sterilising effect Effects 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 5
- CZFMLDUNXATLOW-XKZIYDEJSA-N (5z)-5-[[3-(2-hydroxyethoxymethyl)thiophen-2-yl]methylidene]-10-methoxy-2,2,4-trimethyl-1h-chromeno[3,4-f]quinolin-9-ol Chemical group C1=CC=2NC(C)(C)C=C(C)C=2C2=C1C=1C(OC)=C(O)C=CC=1O\C2=C/C=1SC=CC=1COCCO CZFMLDUNXATLOW-XKZIYDEJSA-N 0.000 claims description 3
- XDLMVUHYZWKMMD-UHFFFAOYSA-N 3-trimethoxysilylpropyl 2-methylprop-2-enoate Chemical compound CO[Si](OC)(OC)CCCOC(=O)C(C)=C XDLMVUHYZWKMMD-UHFFFAOYSA-N 0.000 claims description 3
- KWSLGOVYXMQPPX-UHFFFAOYSA-N 5-[3-(trifluoromethyl)phenyl]-2h-tetrazole Chemical compound FC(F)(F)C1=CC=CC(C2=NNN=N2)=C1 KWSLGOVYXMQPPX-UHFFFAOYSA-N 0.000 claims description 3
- 240000007594 Oryza sativa Species 0.000 claims description 3
- 235000007164 Oryza sativa Nutrition 0.000 claims description 3
- 241000209140 Triticum Species 0.000 claims description 3
- 235000021307 Triticum Nutrition 0.000 claims description 3
- 240000008042 Zea mays Species 0.000 claims description 3
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 claims description 3
- 235000002017 Zea mays subsp mays Nutrition 0.000 claims description 3
- 235000005822 corn Nutrition 0.000 claims description 3
- 239000012153 distilled water Substances 0.000 claims description 3
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 claims description 3
- 238000007710 freezing Methods 0.000 claims description 3
- 230000008014 freezing Effects 0.000 claims description 3
- 239000003960 organic solvent Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 229920000058 polyacrylate Polymers 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 235000009566 rice Nutrition 0.000 claims description 3
- 229910001379 sodium hypophosphite Inorganic materials 0.000 claims description 3
- 239000000725 suspension Substances 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 abstract description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 4
- 230000015556 catabolic process Effects 0.000 abstract description 3
- 238000006731 degradation reaction Methods 0.000 abstract description 3
- 230000009471 action Effects 0.000 abstract description 2
- 239000001569 carbon dioxide Substances 0.000 abstract description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 2
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 abstract description 2
- 244000005700 microbiome Species 0.000 abstract description 2
- 241001553178 Arachis glabrata Species 0.000 abstract 1
- 238000000354 decomposition reaction Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000002028 Biomass Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- SEGBQNJGOCXIGC-FHERZECASA-N benzyl n-[(2s)-1-[(4-hydroxyoxolan-3-yl)amino]-4-methyl-1-oxopentan-2-yl]carbamate Chemical group N([C@@H](CC(C)C)C(=O)NC1C(COC1)O)C(=O)OCC1=CC=CC=C1 SEGBQNJGOCXIGC-FHERZECASA-N 0.000 description 1
- 239000012620 biological material Substances 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000005003 food packaging material Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229920005644 polyethylene terephthalate glycol copolymer Polymers 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- ODLMAHJVESYWTB-UHFFFAOYSA-N propylbenzene Chemical group CCCC1=CC=CC=C1 ODLMAHJVESYWTB-UHFFFAOYSA-N 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L97/00—Compositions of lignin-containing materials
- C08L97/02—Lignocellulosic material, e.g. wood, straw or bagasse
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
- B65D65/46—Applications of disintegrable, dissolvable or edible materials
- B65D65/466—Bio- or photodegradable packaging materials
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08H—DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
- C08H6/00—Macromolecular compounds derived from lignin, e.g. tannins, humic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/06—Biodegradable
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
Abstract
The invention discloses a plastic uptake box material for food and a preparation method thereof, relates to the technical field of food packaging, and aims to solve the problems that the existing plastic uptake box material is not easy to degrade, high in cost and short in service life of manufactured products, and the following scheme is provided and comprises the following raw materials in parts by weight: 50-54 parts of straw, 38-46 parts of polyethylene, 32-36 parts of polylactic acid, 32-36 parts of peanut protein powder, 22-24 parts of polyamide, 9-13 parts of modified nano lignin, 9-13 parts of polyvinyl alcohol, 9-13 parts of plant cellulose, 5-9 parts of potassium sorbate, 5-7 parts of 2-hydroxy-4-methyl acetophenone oxime iron, 2.5-4.5 parts of a silane coupling agent, 1-3 parts of diatomite and 0.5-2 parts of a compatilizer. The plastic uptake box material disclosed by the invention is simple to prepare, low in cost and easy to obtain raw materials, can be completely degraded into carbon dioxide and water under the action of microorganisms, cannot generate pollution, is high in degradation rate, is safe and environment-friendly, and is suitable for the field of food packaging.
Description
Technical Field
The invention relates to the technical field of food packaging, in particular to a plastic uptake box material for food and a preparation method thereof.
Background
The plastic uptake packing box mainly comprises the following raw materials: PVC, PS, PP, PET, PETG and flocking, antistatic and conductive materials. The general name is that plastic products are produced by a common packaging plastic suction process, and the products are packaged by corresponding equipment. And heating the plastic uptake packing box sheet at high temperature, and then performing vacuum air suction and cooling to form the plastic box.
The plastic-absorbing box material is an essential article in daily life, is often used for containing other articles, and is widely used due to the advantages of low price, light weight, large capacity and convenient storage. However, most of the current plastic uptake box materials are mainly made of main materials such as PP, PET and the like and additives, so that the plastic uptake box materials are not easy to degrade, the environmental pollution is aggravated, the preparation cost is high, biomass resources are not recycled, and pungent odor can be generated in the post-treatment process including incineration and the like of some plastic uptake box materials, so that the burden on the environmental protection is aggravated.
In addition, the lignin is a natural high polymer formed by randomly polymerizing highly substituted phenyl propane units, is mainly positioned between cellulose and fibers and plays a role in resisting pressure. As the second most abundant organic matter in the world, lignin is an extremely important renewable biological resource, and the combination of lignin and waste recycling technology is extremely important for solving the problems existing at present, so we propose a plastic uptake box material for food and a preparation method thereof for solving the problems.
Disclosure of Invention
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a food plastic uptake box material in a first aspect, which comprises the following raw materials in parts by weight: 50-54 parts of straw, 38-46 parts of polyethylene, 32-36 parts of polylactic acid, 32-36 parts of peanut protein powder, 22-24 parts of polyamide, 9-13 parts of modified nano lignin, 9-13 parts of polyvinyl alcohol, 9-13 parts of plant cellulose, 5-9 parts of potassium sorbate, 5-7 parts of 2-hydroxy-4-methyl acetophenone oxime iron, 2.5-4.5 parts of a silane coupling agent, 1-3 parts of diatomite and 0.5-2 parts of a compatilizer.
Preferably, the feed comprises the following raw materials in parts by weight: 51-53 parts of straw, 40-44 parts of polyethylene, 33-35 parts of polylactic acid, 33-35 parts of peanut protein powder, 22.5-23.5 parts of polyamide, 10-12 parts of modified nano lignin, 10-12 parts of polyvinyl alcohol, 10-12 parts of plant cellulose, 6-8 parts of potassium sorbate, 5.5-6.5 parts of 2-hydroxy-4-methyl acetophenone oxime iron, 3-4 parts of a silane coupling agent, 1.5-2.5 parts of diatomite and 1-1.5 parts of a compatilizer.
Preferably, the feed comprises the following raw materials in parts by weight: 52 parts of straw, 42 parts of polyethylene, 34 parts of polylactic acid, 34 parts of peanut protein powder, 23 parts of polyamide, 11 parts of modified nano lignin, 11 parts of polyvinyl alcohol, 11 parts of plant cellulose, 7 parts of potassium sorbate, 6 parts of 2-hydroxy-4-methyl acetophenone oxime iron, 3.5 parts of silane coupling agent, 2 parts of diatomite and 1.3 parts of compatilizer.
Preferably, the mass ratio of the modified nano lignin to the polyvinyl alcohol to the plant cellulose is 1: 1: 1.
preferably, the silane coupling agent is prepared by the following steps: slowly adding vinyl trimethoxy silane and gamma-methacryloxypropyl trimethoxy silane into distilled water, stirring for 20-40 min, heating to 60-68 ℃, reacting for 1-2 h, removing low-boiling-point substances in vacuum, continuously heating to 100-120 ℃ until no substances are removed, and cooling to room temperature to obtain the silane coupling agent.
Preferably, the modified nano lignin is prepared by the following steps: dissolving chlorogenic acid in an organic solvent, adding sodium hypophosphite under stirring, uniformly mixing, adding nano lignin, continuously stirring and mixing to enable the nano lignin to be fully contacted with the chlorogenic acid to obtain a suspension, heating to 60-68 ℃, adding a silane coupling agent, keeping high shear, stirring and reacting for 25-30 min, and then performing pumping drying, washing, freezing and drying to obtain the modified nano lignin.
Preferably, the compatilizer is one or a combination of modified polyacrylate or amino-terminated polyurethane.
Preferably, the straw is one or more of rice straw, wheat straw, corn straw, beanstalk or rape straw.
In a second aspect of the invention, a method for preparing a plastic uptake box material for food is provided, which comprises the following preparation steps:
s1, crushing the straw in parts by weight to a particle size of 250-350 meshes, adding the crushed straw, polyethylene, polylactic acid, plant cellulose, a compatilizer and diatomite into a stirring container, setting the stirring speed to be 200-400 r/min, stirring for 30-50 min, heating to 60-68 ℃, and continuing stirring for 1-2 h at a speed of 100-120 r/min to obtain a base material;
s2, cooling the base material to normal temperature, adding polyamide, modified nano lignin, polyvinyl alcohol, potassium sorbate and 2-hydroxy-4-methyl acetophenone oxime iron, adjusting the rotation speed to 800-1200 r/min, continuing stirring for 5-9 min, defoaming, sterilizing, placing in a drying oven, drying at 100-120 ℃ for 10-20 min, and naturally cooling to obtain a semi-finished material;
and S3, adding peanut protein powder and a silane coupling agent into the semi-finished product material in sequence, uniformly mixing, placing in a drying box, drying at 60-80 ℃ for 1-2 h, taking out, and extruding and granulating by a double-screw extruder to obtain the plastic uptake box material for food.
In a third aspect of the invention, a blister box for food is provided, which comprises the blister box material.
Compared with the prior art, the invention has the beneficial effects that:
the raw materials of the invention are reasonable in proportion, mainly biomass material straw, peanut protein powder, polyethylene and polylactic acid are used as main base materials, the cost is saved, the environment is protected, the degradation rate is high, simultaneously, no pungent smell is generated by natural burning, no pollution is caused to the environment, the nano lignin is modified by cooperating with the silane coupling agent and the chlorogenic acid, the good dispersion performance of the modified nano lignin in the polymer is improved, and the invention has excellent oxygen resistance, thereby saving the use of the antioxidant additive and being beneficial to safe food packaging. In addition, the invention prevents the improvement of the easy decomposition of the plastic uptake box material in the use process, the improvement of the toughness and tensile strength of the product, the anti-tearing property and the improvement of the service life and the quality of the product by adding the plant cellulose, the potassium sorbate, the 2-hydroxy-4-methyl acetophenone oxime iron and the like. The plastic uptake box material disclosed by the invention is simple to prepare, low in cost and easy to obtain raw materials, can be completely degraded into carbon dioxide and water under the action of microorganisms, cannot generate pollution, is high in degradation rate, is safe and environment-friendly, and is suitable for the field of food packaging.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to specific embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example one
The invention provides a food plastic uptake box material which comprises the following raw materials in parts by weight: 50 parts of straw, 38 parts of polyethylene, 32 parts of polylactic acid, 32 parts of peanut protein powder, 22 parts of polyamide, 9 parts of modified nano lignin, 9 parts of polyvinyl alcohol, 9 parts of plant cellulose, 5 parts of potassium sorbate, 5 parts of 2-hydroxy-4-methyl acetophenone oxime iron, 2.5 parts of silane coupling agent, 1 part of diatomite and 0.5 part of compatilizer;
the preparation method comprises the following preparation steps:
s1, crushing the straw in parts by weight to a particle size of 250 meshes, adding the crushed straw, polyethylene, polylactic acid, plant cellulose, a compatilizer and diatomite into a stirring container, setting the stirring speed to be 200r/min, stirring for 30min, heating to 60 ℃, and continuing to stir at a speed of 100r/min for 1h to obtain a base material;
s2, cooling the base material to normal temperature, adding polyamide, modified nano lignin, polyvinyl alcohol, potassium sorbate and 2-hydroxy-4-methyl acetophenone oxime iron, adjusting the rotation speed to 800r/min, continuing stirring for 5min, defoaming, sterilizing, placing in a drying oven, drying at 100 ℃ for 10min, and naturally cooling to obtain a semi-finished material;
and S3, adding peanut protein powder and a silane coupling agent into the semi-finished product material in sequence, uniformly mixing, placing in a drying box, drying for 1h at the temperature of 60 ℃, taking out, and extruding and granulating by a double-screw extruder to obtain the plastic uptake box material for food.
Example two
The invention provides a food plastic uptake box material which comprises the following raw materials in parts by weight: 51 parts of straw, 40 parts of polyethylene, 33 parts of polylactic acid, 33 parts of peanut protein powder, 22.5 parts of polyamide, 10 parts of modified nano lignin, 10 parts of polyvinyl alcohol, 10 parts of plant cellulose, 6 parts of potassium sorbate, 5.5 parts of 2-hydroxy-4-methyl acetophenone oxime iron, 3 parts of silane coupling agent, 1.5 parts of diatomite and 1 part of compatilizer;
the preparation method comprises the following preparation steps:
s1, crushing the straws in parts by weight to 275 meshes, adding the crushed straws, polyethylene, polylactic acid, plant cellulose, a compatilizer and diatomite into a stirring container, setting the stirring speed to be 250r/min, stirring for 35min, heating to 62 ℃, and continuing stirring at the speed of 105r/min for 1.3h to obtain a base material;
s2, cooling the base material to normal temperature, adding polyamide, modified nano lignin, polyvinyl alcohol, potassium sorbate and 2-hydroxy-4-methyl acetophenone oxime iron, adjusting the rotation speed to 900r/min, continuing stirring for 6min, defoaming, sterilizing, placing in a drying oven, drying at 105 ℃ for 13min, and naturally cooling to obtain a semi-finished material;
and S3, adding peanut protein powder and a silane coupling agent into the semi-finished product material in sequence, uniformly mixing, placing in a drying box, drying at 65 ℃ for 1.3h, taking out, and extruding and granulating by a double-screw extruder to obtain the plastic uptake box material for food.
EXAMPLE III
The invention provides a food plastic uptake box material which comprises the following raw materials in parts by weight: 52 parts of straw, 42 parts of polyethylene, 34 parts of polylactic acid, 34 parts of peanut protein powder, 23 parts of polyamide, 11 parts of modified nano lignin, 11 parts of polyvinyl alcohol, 11 parts of plant cellulose, 7 parts of potassium sorbate, 6 parts of 2-hydroxy-4-methyl acetophenone oxime iron, 3.5 parts of silane coupling agent, 2 parts of diatomite and 1.3 parts of compatilizer;
the preparation method comprises the following preparation steps:
s1, crushing the straws in parts by weight to 300 meshes, adding the crushed straws, polyethylene, polylactic acid, plant cellulose, a compatilizer and diatomite into a stirring container, setting the stirring speed to 300r/min, stirring for 40min, heating to 64 ℃, and continuing stirring for 1.5h at the speed of 110r/min to obtain a base material;
s2, cooling the base material to normal temperature, adding polyamide, modified nano lignin, polyvinyl alcohol, potassium sorbate and 2-hydroxy-4-methyl acetophenone oxime iron, adjusting the rotation speed to 1000r/min, continuing stirring for 7min, defoaming, sterilizing, placing in a drying oven, drying at 110 ℃ for 15min, and naturally cooling to obtain a semi-finished material;
and S3, adding peanut protein powder and a silane coupling agent into the semi-finished product material in sequence, uniformly mixing, placing in a drying box, drying at 70 ℃ for 1.5h, taking out, and extruding and granulating by a double-screw extruder to obtain the plastic uptake box material for food.
Example four
The invention provides a food plastic uptake box material which comprises the following raw materials in parts by weight: 53 parts of straw, 44 parts of polyethylene, 35 parts of polylactic acid, 35 parts of peanut protein powder, 23.5 parts of polyamide, 12 parts of modified nano lignin, 12 parts of polyvinyl alcohol, 12 parts of plant cellulose, 8 parts of potassium sorbate, 6.5 parts of 2-hydroxy-4-methyl acetophenone oxime iron, 4 parts of silane coupling agent, 2.5 parts of diatomite and 1.5 parts of compatilizer;
the preparation method comprises the following preparation steps:
s1, crushing the straws in parts by weight to 325 meshes, adding the crushed straws, polyethylene, polylactic acid, plant cellulose, a compatilizer and diatomite into a stirring container, setting the stirring speed to be 350r/min, stirring for 45min, heating to 66 ℃, and continuing stirring at the speed of 115r/min for 1.8h to obtain a base material;
s2, cooling the base material to normal temperature, adding polyamide, modified nano lignin, polyvinyl alcohol, potassium sorbate and 2-hydroxy-4-methyl acetophenone oxime iron, adjusting the rotation speed to 1100r/min, continuing stirring for 8min, defoaming, sterilizing, placing in a drying oven, drying at 115 ℃ for 18min, and naturally cooling to obtain a semi-finished material;
and S3, adding peanut protein powder and a silane coupling agent into the semi-finished product material in sequence, uniformly mixing, placing in a drying box, drying at 75 ℃ for 1.8h, taking out, and extruding and granulating by a double-screw extruder to obtain the plastic uptake box material for food.
EXAMPLE five
The invention provides a food plastic uptake box material which comprises the following raw materials in parts by weight: 54 parts of straw, 46 parts of polyethylene, 36 parts of polylactic acid, 36 parts of peanut protein powder, 24 parts of polyamide, 13 parts of modified nano lignin, 13 parts of polyvinyl alcohol, 13 parts of plant cellulose, 9 parts of potassium sorbate, 7 parts of 2-hydroxy-4-methyl acetophenone oxime iron, 4.5 parts of silane coupling agent, 3 parts of diatomite and 2 parts of compatilizer;
the preparation method comprises the following preparation steps:
s1, crushing the straws in parts by weight to 350 meshes, adding the crushed straws, polyethylene, polylactic acid, plant cellulose, a compatilizer and diatomite into a stirring container, setting the stirring speed to be 400r/min, stirring for 50min, heating to 68 ℃, and continuing stirring at the speed of 120r/min for 2h to obtain a base material;
s2, cooling the base material to normal temperature, adding polyamide, modified nano lignin, polyvinyl alcohol, potassium sorbate and 2-hydroxy-4-methyl acetophenone oxime iron, adjusting the rotation speed to 1200r/min, continuing stirring for 9min, defoaming, sterilizing, placing in a drying oven, drying at 120 ℃ for 20min, and naturally cooling to obtain a semi-finished material;
and S3, adding peanut protein powder and a silane coupling agent into the semi-finished product material in sequence, uniformly mixing, placing in a drying box, drying at 80 ℃ for 2h, taking out, and performing extrusion granulation by a double-screw extruder to obtain the plastic uptake box material for food.
The values in the first to fifth embodiments of the present invention are that the mass ratio of the modified nano lignin, the polyvinyl alcohol, and the plant cellulose is 1: 1: 1. the compatilizer is one or a composition of two of modified polyacrylate or amino-terminated polyurethane.
The straw is one or a combination of rice straw, wheat straw, corn straw, beanstalk or rape straw. The silane coupling agent is prepared by the following steps: slowly adding vinyl trimethoxy silane and gamma-methacryloxypropyl trimethoxy silane into distilled water, stirring for 20-40 min, heating to 60-68 ℃, reacting for 1-2 h, removing low-boiling-point substances in vacuum, continuously heating to 100-120 ℃ until no substances are removed, and cooling to room temperature to obtain the silane coupling agent.
The modified nano lignin is prepared by the following steps: dissolving chlorogenic acid in an organic solvent, adding sodium hypophosphite under stirring, uniformly mixing, adding nano lignin, continuously stirring and mixing to enable the nano lignin to be fully contacted with the chlorogenic acid to obtain a suspension, heating to 60-68 ℃, adding a silane coupling agent, keeping high shear, stirring and reacting for 25-30 min, and then performing pumping drying, washing, freezing and drying to obtain the modified nano lignin.
Comparative example
Blister box materials are commercially available.
The blister box materials obtained in the above examples one to five and comparative examples were tested for tensile strength, breaking strength, odor after burning and performance after decomposition treatment (3 months), respectively, and the test results are detailed in the following table:
from the results in table 1, it can be seen that the plastic uptake box materials prepared in the first to fifth embodiments of the present invention do not generate odor after incineration, have high tensile strength, are not easy to tear, and are all superior to the plastic uptake box materials on the market, and in addition, after decomposition treatment, the biological decomposition rate of the plastic uptake box materials of the present invention reaches 100%, and no substances harmful to human body are generated, so that the plastic uptake box materials are suitable for the fields of food packaging and biological materials.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The plastic uptake box material for food is characterized by comprising the following raw materials in parts by weight: 50-54 parts of straw, 38-46 parts of polyethylene, 32-36 parts of polylactic acid, 32-36 parts of peanut protein powder, 22-24 parts of polyamide, 9-13 parts of modified nano lignin, 9-13 parts of polyvinyl alcohol, 9-13 parts of plant cellulose, 5-9 parts of potassium sorbate, 5-7 parts of 2-hydroxy-4-methyl acetophenone oxime iron, 2.5-4.5 parts of a silane coupling agent, 1-3 parts of diatomite and 0.5-2 parts of a compatilizer.
2. The plastic uptake box material for food as claimed in claim 1, which comprises the following raw materials in parts by weight: 51-53 parts of straw, 40-44 parts of polyethylene, 33-35 parts of polylactic acid, 33-35 parts of peanut protein powder, 22.5-23.5 parts of polyamide, 10-12 parts of modified nano lignin, 10-12 parts of polyvinyl alcohol, 10-12 parts of plant cellulose, 6-8 parts of potassium sorbate, 5.5-6.5 parts of 2-hydroxy-4-methyl acetophenone oxime iron, 3-4 parts of a silane coupling agent, 1.5-2.5 parts of diatomite and 1-1.5 parts of a compatilizer.
3. The plastic uptake box material for food as claimed in claim 1, which comprises the following raw materials in parts by weight: 52 parts of straw, 42 parts of polyethylene, 34 parts of polylactic acid, 34 parts of peanut protein powder, 23 parts of polyamide, 11 parts of modified nano lignin, 11 parts of polyvinyl alcohol, 11 parts of plant cellulose, 7 parts of potassium sorbate, 6 parts of 2-hydroxy-4-methyl acetophenone oxime iron, 3.5 parts of silane coupling agent, 2 parts of diatomite and 1.3 parts of compatilizer.
4. The plastic uptake box material for food as claimed in claim 1, wherein the mass ratio of the modified nano lignin, the polyvinyl alcohol and the plant cellulose is 1: 1: 1.
5. the plastic uptake box material for food as claimed in claim 1, wherein the silane coupling agent is prepared by the steps of: slowly adding vinyl trimethoxy silane and gamma-methacryloxypropyl trimethoxy silane into distilled water, stirring for 20-40 min, heating to 60-68 ℃, reacting for 1-2 h, removing low-boiling-point substances in vacuum, continuously heating to 100-120 ℃ until no substances are removed, and cooling to room temperature to obtain the silane coupling agent.
6. The plastic uptake box material for food as claimed in claim 5, wherein the modified nano lignin is prepared by the following steps: dissolving chlorogenic acid in an organic solvent, adding sodium hypophosphite under stirring, uniformly mixing, adding nano lignin, continuously stirring and mixing to enable the nano lignin to be fully contacted with the chlorogenic acid to obtain a suspension, heating to 60-68 ℃, adding a silane coupling agent, keeping high shear, stirring and reacting for 25-30 min, and then performing pumping drying, washing, freezing and drying to obtain the modified nano lignin.
7. The blister box material for food according to claim 1, wherein the compatibilizer is one or a combination of modified polyacrylate or amino-terminated polyurethane.
8. The plastic uptake box material for food as claimed in claim 1, wherein the straw is selected from one or more of rice straw, wheat straw, corn straw, beanstalk and rape straw.
9. A method for preparing the blister box material for food according to any one of claims 1 to 8, comprising the following steps:
s1, crushing the straw in parts by weight to a particle size of 250-350 meshes, adding the crushed straw, polyethylene, polylactic acid, plant cellulose, a compatilizer and diatomite into a stirring container, setting the stirring speed to be 200-400 r/min, stirring for 30-50 min, heating to 60-68 ℃, and continuing stirring for 1-2 h at a speed of 100-120 r/min to obtain a base material;
s2, cooling the base material to normal temperature, adding polyamide, modified nano lignin, polyvinyl alcohol, potassium sorbate and 2-hydroxy-4-methyl acetophenone oxime iron, adjusting the rotation speed to 800-1200 r/min, continuing stirring for 5-9 min, defoaming, sterilizing, placing in a drying oven, drying at 100-120 ℃ for 10-20 min, and naturally cooling to obtain a semi-finished material;
and S3, adding peanut protein powder and a silane coupling agent into the semi-finished product material in sequence, uniformly mixing, placing in a drying box, drying at 60-80 ℃ for 1-2 h, taking out, and extruding and granulating by a double-screw extruder to obtain the plastic uptake box material for food.
10. A blister pack for food, characterized in that the blister pack comprises the blister pack material according to any one of claims 1 to 8.
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