CN114561065A - Polypropylene composite material with biological inductivity and preparation method and application thereof - Google Patents
Polypropylene composite material with biological inductivity and preparation method and application thereof Download PDFInfo
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- CN114561065A CN114561065A CN202111535625.4A CN202111535625A CN114561065A CN 114561065 A CN114561065 A CN 114561065A CN 202111535625 A CN202111535625 A CN 202111535625A CN 114561065 A CN114561065 A CN 114561065A
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- -1 Polypropylene Polymers 0.000 title claims abstract description 73
- 239000004743 Polypropylene Substances 0.000 title claims abstract description 72
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 72
- 239000002131 composite material Substances 0.000 title claims abstract description 47
- 238000002360 preparation method Methods 0.000 title abstract description 11
- 239000002023 wood Substances 0.000 claims abstract description 44
- 241001465754 Metazoa Species 0.000 claims abstract description 43
- 239000000411 inducer Substances 0.000 claims abstract description 27
- 239000000843 powder Substances 0.000 claims abstract description 26
- 239000003822 epoxy resin Substances 0.000 claims abstract description 13
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 13
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000002245 particle Substances 0.000 claims abstract description 5
- 235000013312 flour Nutrition 0.000 claims description 17
- 238000002156 mixing Methods 0.000 claims description 13
- 238000001125 extrusion Methods 0.000 claims description 9
- 239000000796 flavoring agent Substances 0.000 claims description 9
- 235000019634 flavors Nutrition 0.000 claims description 9
- 235000013305 food Nutrition 0.000 claims description 6
- 239000003960 organic solvent Substances 0.000 claims description 6
- 239000005667 attractant Substances 0.000 claims description 5
- 230000031902 chemoattractant activity Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 235000013339 cereals Nutrition 0.000 claims description 4
- 238000005469 granulation Methods 0.000 claims description 4
- 230000003179 granulation Effects 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000003607 modifier Substances 0.000 claims description 4
- 239000000155 melt Substances 0.000 claims description 3
- YIKYNHJUKRTCJL-UHFFFAOYSA-N Ethyl maltol Chemical compound CCC=1OC=CC(=O)C=1O YIKYNHJUKRTCJL-UHFFFAOYSA-N 0.000 claims description 2
- 229940024606 amino acid Drugs 0.000 claims description 2
- 150000001413 amino acids Chemical class 0.000 claims description 2
- ZDKZHVNKFOXMND-UHFFFAOYSA-N cis-Nepetalactone Natural products O=C1OC=C(C)C2C1C(C)CC2 ZDKZHVNKFOXMND-UHFFFAOYSA-N 0.000 claims description 2
- ZDKZHVNKFOXMND-NBEYISGCSA-N cis-trans-nepetalactone Chemical group O=C1OC=C(C)[C@@H]2[C@H]1[C@@H](C)CC2 ZDKZHVNKFOXMND-NBEYISGCSA-N 0.000 claims description 2
- PXEDJBXQKAGXNJ-QTNFYWBSSA-L disodium L-glutamate Chemical compound [Na+].[Na+].[O-]C(=O)[C@@H](N)CCC([O-])=O PXEDJBXQKAGXNJ-QTNFYWBSSA-L 0.000 claims description 2
- 229940093503 ethyl maltol Drugs 0.000 claims description 2
- 235000013923 monosodium glutamate Nutrition 0.000 claims description 2
- 229940073490 sodium glutamate Drugs 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 230000014759 maintenance of location Effects 0.000 abstract description 5
- 239000011159 matrix material Substances 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 230000002045 lasting effect Effects 0.000 abstract description 3
- 230000002688 persistence Effects 0.000 abstract description 3
- 230000002195 synergetic effect Effects 0.000 abstract description 3
- 230000000717 retained effect Effects 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 16
- 238000012360 testing method Methods 0.000 description 6
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 3
- 239000003205 fragrance Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 241000282472 Canis lupus familiaris Species 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 241000282326 Felis catus Species 0.000 description 2
- 230000001186 cumulative effect Effects 0.000 description 2
- 238000004108 freeze drying Methods 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 241000282324 Felis Species 0.000 description 1
- 206010020751 Hypersensitivity Diseases 0.000 description 1
- 240000009215 Nepeta cataria Species 0.000 description 1
- 235000010679 Nepeta cataria Nutrition 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 208000030961 allergic reaction Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000861 blow drying Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000005303 weighing Methods 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
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K1/00—Housing animals; Equipment therefor
- A01K1/02—Pigsties; Dog-kennels; Rabbit-hutches or the like
- A01K1/03—Housing for domestic or laboratory animals
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K5/00—Feeding devices for stock or game ; Feeding wagons; Feeding stacks
- A01K5/01—Feed troughs; Feed pails
- A01K5/0114—Pet food dispensers; Pet food trays
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Animal Husbandry (AREA)
- Chemical & Material Sciences (AREA)
- Zoology (AREA)
- Health & Medical Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Polymers & Plastics (AREA)
- Birds (AREA)
- Organic Chemistry (AREA)
- Medicinal Chemistry (AREA)
- Animal Behavior & Ethology (AREA)
- Clinical Laboratory Science (AREA)
- General Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
The invention discloses a polypropylene composite material with biological inductivity and a preparation method and application thereof. The polypropylene composite material comprises the following components in parts by weight: 80-90 parts of polypropylene, 1-5 parts of a compatilizer, 8-12 parts of wood powder, 1-3 parts of a biological inducer and 2-5 parts of epoxy resin, wherein the average particle size of the wood powder is 100-200 microns; the compatilizer is polypropylene grafted maleic anhydride. According to the invention, the porous structure of the wood powder is utilized, so that the biological inducer is effectively adsorbed and retained, the retention time of the biological inducer is prolonged, the release persistence is prolonged, the release concentration is balanced, and a slow-release effect is formed; the wood powder, the compatilizer and the epoxy resin have synergistic effect, so that the biological inducer is uniformly dispersed in the polypropylene matrix, the release concentration is more balanced, and the biological inducer has more lasting attractiveness to animals.
Description
Technical Field
The invention relates to the technical field of high polymer materials, in particular to a polypropylene composite material with biological inductivity and a preparation method and application thereof.
Background
At present, with the improvement of the life quality of people, the demand on pets is higher and higher, and how to effectively train animals to eat, defecate and sleep in a specified place becomes a new demand of current life. The articles (such as pet lunch boxes and cages, and common materials are thermoplastics such as polypropylene and the like) which are frequently contacted by animals are utilized, biological induction components are added in the articles, and the articles are attracted to a specified place by utilizing smell, color and the like to become a new direction for applying the materials at present.
At present, the prior art reports that fragrance materials are added to polymers by conventional processing means of melt blending. The prior art discloses a scented plastic comprising a plastic body, a stabilizer and a fragrance. However, the blending and extrusion of the fragrant substance directly with the polymer plastic have problems of unbalanced odor emission, low odor persistence, and rapid decrease of the odor concentration with time of the plastic product, and also have problems of causing allergic reaction to human body or pets due to the over-high initial odor concentration.
In addition, articles for pets are required to have extremely high safety without toxicity and odor, and good mechanical properties. Therefore, it is necessary to develop a polypropylene composite material with bio-inductivity and slow-release odor.
Disclosure of Invention
In order to overcome the defect that the odor cannot be slowly released in the prior art, the invention provides the polypropylene composite material with biological inductivity.
The invention also aims to provide a preparation method of the polypropylene composite material.
The invention also aims to provide application of the polypropylene composite material in the fields of preparation of pet products, animal domestication and animal reproduction.
In order to solve the technical problems, the invention adopts the technical scheme that:
a polypropylene composite material with biological inductivity comprises the following components in parts by weight:
80-90 parts of polypropylene,
1-5 parts of a compatilizer,
8-12 parts of wood powder,
1-3 parts of a biological inducer,
2-5 parts of epoxy resin,
the average grain size of the wood powder is 100-200 mu m; the compatilizer is polypropylene grafted maleic anhydride.
The wood flour has a porous structure, can effectively adsorb and retain the biological inducer, and can improve the retention time of the biological inducer, prolong the release duration, balance the release concentration and form a slow-release effect after being mixed and extruded with other components. Meanwhile, the wood powder has wood fragrance and high affinity, and can improve the affinity and interestingness of animals to the polypropylene composite material.
The addition of the epoxy resin can cooperate with the compatilizer to increase the binding force of the wood powder and the polypropylene matrix, so that the retention time of the biological inducer is further prolonged.
Preferably, the grafting rate of maleic anhydride in the polypropylene grafted maleic anhydride is 1-2%.
Preferably, the wood flour has a pore density of 1-5/100 μm2The average pore diameter is 1 to 10 μm.
The detection method of the pore density and the average grain diameter of the wood powder comprises the following steps:
weighing 0.1g of wood powder sample, heating at 80 ℃ for 4h, spraying gold, observing with an electron microscope at 400-600 times, and measuring the thickness at 400 mu m2Under the visual field, the holes in the film are captured by using image capturing software, the hole diameter value and the hole number are obtained, and the hole density and the average hole diameter are calculated.
Preferably, the average grain size of the wood powder is 160-180 mm.
Preferably, the wood flour is oak wood flour.
The oak has better heat resistance, and the oak wood powder is preferably selected because the oak wood powder has better heat stability in the subsequent melt extrusion process.
Preferably, the bio-inducer is a food flavour improver and/or an animal flavour attractant.
The food flavor modifier has attractive flavor and is very easy to attract the attention of animals. The animal flavor attractant can be a major component of catmint extract and can cause excitation in felines.
Preferably, the food flavor modifier is one or more of ethyl maltol, sodium glutamate or amino acids.
Preferably, the animal scent attractant is nepetalactone.
Preferably, the melt flow rate of the polypropylene at 230 ℃ under a load of 2.16kg is 15-25 g/10 min.
The method for detecting the melt flow rate of the polypropylene resin is GB/T3682-2018.
Preferably, the polypropylene composite material comprises the following components in parts by weight: 83-88 parts of polypropylene, 2-4 parts of a compatilizer, 9-11 parts of wood powder, 1.5-2.5 parts of a biological inducer and 2.5-4 parts of epoxy resin.
More preferably, the polypropylene composite material comprises the following components in parts by weight: 85 parts of polypropylene, 3 parts of compatilizer, 10 parts of wood powder, 2 parts of biological inducer and 3 parts of epoxy resin.
The invention also provides a preparation method of the polypropylene composite material, which comprises the following steps:
s1, mixing an organic solvent dissolved with a biological inducer with wood flour, uniformly stirring, and removing the organic solvent to obtain modified wood flour;
s2, mixing the modified wood powder prepared in the step S1, polypropylene, a compatilizer and epoxy resin, adding the mixture into an extruder, and carrying out melt mixing, extrusion and granulation to obtain the polypropylene composite material.
Preferably, in step S1, the stirring uniformly means stirring at a rotation speed of 20 to 50rpm for 3 to 5 min.
Preferably, in step S1, the solvent removal refers to nitrogen blow drying or freeze drying.
Preferably, the extruder is a twin screw extruder.
Preferably, the extrusion temperature of the double-screw extruder is 120-160 ℃, the rotating speed of the screw is 200-400 rpm, and the length-diameter ratio of the screw is 40-48: 1.
The invention also protects the application of the polypropylene composite material in the fields of preparation of pet supplies, animal domestication and animal reproduction.
Compared with the prior art, the invention has the beneficial effects that:
the invention discloses a polypropylene composite material with biological inductivity. By utilizing the porous structure of the wood powder, the biological inducer is effectively adsorbed and retained, the retention time of the biological inducer is prolonged, the release persistence is prolonged, and a slow-release effect is formed; the wood powder, the compatilizer and the epoxy resin have synergistic effect, so that the biological inducer is uniformly dispersed in the polypropylene matrix, the release concentration is more balanced, and the biological inducer has more lasting attractiveness to animals.
Detailed Description
The present invention will be further described with reference to the following embodiments.
The raw materials in the examples and comparative examples are all commercially available;
reagents, methods and apparatus used in the present invention are conventional in the art unless otherwise indicated.
Examples 1 to 15
Examples 1 to 15 respectively provide a polypropylene composite material, the component contents of which are shown in table 1, and the preparation method is as follows:
s1, mixing an organic solvent (ether) dissolved with a biological inducer with wood flour, stirring at the rotating speed of 30rpm for 5min, and freeze-drying to remove the organic solvent to obtain modified wood flour;
s2, mixing the modified wood powder prepared in the step S1, polypropylene, a compatilizer and epoxy resin, adding the mixture into a double-screw extruder, and performing melt mixing and extrusion granulation to obtain a polypropylene composite material;
the extrusion temperature of the double-screw extruder is 120-160 ℃, the rotating speed of the screw is 200-400 rpm, and the length-diameter ratio of the screw is 40: 1.
TABLE 1 component content (parts by weight) of the polypropylene composites of examples 1 to 15
Comparative examples 1 to 4
Comparative examples 1 to 4 respectively provide a polypropylene composite material, the component contents are shown in Table 2, and the preparation methods of comparative examples 1, 3 and 4 are the same as those of examples 1 to 14; the preparation method of comparative example 2 was as follows:
mixing the components according to the content of the components in the comparative example 2, adding the mixture into a double-screw extruder together, and performing melt mixing, extrusion and granulation to obtain the polypropylene composite material; the extrusion temperature of the double-screw extruder is 120-160 ℃, the rotating speed of the screw is 200-400 rpm, and the length-diameter ratio of the screw is 40: 1.
TABLE 2 component contents (parts by weight) of the polypropylene composite of comparative examples 1 to 4
Performance testing
The polypropylene composite materials prepared in the above examples and comparative examples were tested for their performance by the following specific methods:
length of animal contact: the polypropylene composite material was injection molded into 16 blocks of 10cm by 10cm square plates immediately placed at 16m2In the room, the square boards are placed at a density of 1 block/m2Observing the total time of the animal contacting the square plate within 24 hours when the room temperature is 23 ℃ and the humidity is 50 percent, performing three groups of parallel experiments, and calculating an average value A;
the square plate is placed in a closed environment with the temperature of 23 ℃ and the humidity of 50 percent for 15 days after injection molding, and then placed at 16m2In the room, the square boards are placed at a density of 1 block/m2Observing the total time of the animal contacting the square plate within 24 hours when the room temperature is 23 ℃ and the humidity is 50 percent, performing three groups of parallel experiments, and calculating an average value B;
after the square plate is subjected to injection molding, the square plate is placed in a closed environment with the temperature of 23 ℃ and the humidity of 50 percent for 30 days and then placed at 16m again2In the room, the square plates are placed at a density of 1 block/m2Observing the total time of the animal contacting the square plate within 24 hours when the room temperature is 23 ℃ and the humidity is 50 percent, performing three groups of parallel experiments, and calculating an average value C;
in the invention, any part of the animal body is considered to touch the square plate for 3 seconds or more, namely the square plate is the touch square plate; the specific test method for the total length of time that the animal contacted the square plate within 24 hours was: timing is started when the animal touches the square plate once, and timing is stopped when the animal leaves; the cumulative time of the "total duration" is counted when the square plate time of single contact is 3s or more, and the cumulative time of the "total duration" is not counted when the square plate time of single contact is 3s or less.
Of these, the animals used in examples 5 and 6 were dogs, and the animals used in the remaining examples and comparative examples were cats.
The test results of examples 1 to 15 are shown in Table 3, and the test results of comparative examples 1 to 4 are shown in Table 4.
TABLE 3 test results of examples 1 to 15
From the test results of table 3, it can be seen that the polypropylene composites prepared in the examples of the present invention have good, long lasting attractiveness to animals (cats or dogs).
According to examples 1 to 4, when the average particle size of the wood flour is 160 to 180 μm, the polypropylene composite material has higher attractiveness to animals, and after the wood flour is placed for 30 days, the animal contact time (C) is longer, which indicates that the polypropylene composite material has better durability.
From examples 1 and 7, when the grafting ratio of the maleic anhydride in the compatilizer is higher, the compatibility among the components is better, so that the polypropylene composite material has longer attraction to animals.
From the embodiments 1 and 9 to 15, the polypropylene composite material of the embodiment 14 has a high animal contact time (a), and after being placed for different times, has a low animal attraction decrease degree, i.e., the animal contact time (B) and the animal contact time (C) are kept for a long time, which indicates that the biological inducer has a long retention time, a good release duration and a slow release effect. Therefore, the polypropylene composite material of the present invention preferably comprises 85 parts of polypropylene, 3 parts of a compatibilizer, 10 parts of wood powder, 2 parts of a biological inducer and 3 parts of epoxy resin. In example 15, although the length of time (A) for which the animals were exposed was long, the rate of dissipation of the bio-inducer was fast and the attractiveness to the animals decreased after 15 days and 30 days of standing.
TABLE 4 test results for comparative examples 1-4
Compared with the comparative example 1, when the compatilizer is polyethylene grafted maleic anhydride, but polypropylene grafted maleic anhydride is not, the compatilizer has weak compatibilization promoting effect with the polypropylene resin matrix, wood powder and other components, so that the biological inducer is released quickly, and the prepared polypropylene composite material has poor lasting attraction to animals.
Comparative example 2, which contained no wood flour and the bio-inducer was not adsorbed to the wood flour but directly blended with other components, produced a polypropylene composite having very poor permanent attractiveness to animals, and the animal contact time (B) was only 6.2 hours after 15 days of standing, and the animal contact time (C) was only 2.1 hours after 30 days of standing.
Comparative example 3 does not contain epoxy resin, cannot form a synergistic effect with a compatibilizer, has poor binding force between wood flour and a polypropylene resin matrix, and has poor attractiveness to animals after the polypropylene composite material is left for 30 days.
In comparative example 4, the wood flour has too large average particle size and cannot be well dispersed in the polypropylene system, and the biological inducer adsorbed by the wood flour is difficult to be uniformly distributed and released in the polypropylene composite material for a long time. The polypropylene composite prepared in comparative example 4 is very unattractive to animals.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The polypropylene composite material with biological inductivity is characterized by comprising the following components in parts by weight:
80-90 parts of polypropylene, 1-5 parts of compatilizer, 8-12 parts of wood powder, 1-3 parts of biological inducer, 2-5 parts of epoxy resin,
the average grain size of the wood powder is 100-200 mu m; the compatilizer is polypropylene grafted maleic anhydride.
2. The polypropylene composite material according to claim 1, wherein the grafting ratio of maleic anhydride in the polypropylene grafted maleic anhydride is 1-2%.
3. The polypropylene composite material according to claim 1, wherein the wood flour has a pore density of 1 to 5 particles/100 μm2The average pore diameter is 1 to 10 μm.
4. The polypropylene composite material according to claim 1, wherein the wood flour has an average particle size of 160 to 180 mm.
5. The polypropylene composite of claim 1, wherein the bio-inducer is a food flavor modifier and/or an animal flavor attractant.
6. The polypropylene composite material according to claim 5, wherein the food flavor modifier is one or more of ethyl maltol, sodium glutamate or amino acids.
7. The polypropylene composite of claim 5, wherein the animal scent attractant is nepetalactone.
8. The polypropylene composite according to claim 1, wherein the polypropylene has a melt flow rate of 15 to 25g/10min at 230 ℃ under a load of 2.16 kg.
9. A method for preparing the polypropylene composite material as claimed in any one of claims 1 to 8, comprising the steps of:
s1, mixing an organic solvent dissolved with a biological inducer with wood powder, uniformly stirring, and removing the organic solvent to obtain modified wood powder;
s2, mixing the modified wood powder prepared in the step S1, polypropylene, a compatilizer and epoxy resin, adding the mixture into an extruder, and carrying out melt mixing, extrusion and granulation to obtain the polypropylene composite material.
10. Use of a polypropylene composite as claimed in any one of claims 1 to 8 in the manufacture of pet food, animal care, animal reproduction.
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