CN112745646A - Degradable composite material with flocking simulating effect and preparation method thereof - Google Patents
Degradable composite material with flocking simulating effect and preparation method thereof Download PDFInfo
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- CN112745646A CN112745646A CN202011594066.XA CN202011594066A CN112745646A CN 112745646 A CN112745646 A CN 112745646A CN 202011594066 A CN202011594066 A CN 202011594066A CN 112745646 A CN112745646 A CN 112745646A
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- 230000000694 effects Effects 0.000 title claims abstract description 40
- 239000002131 composite material Substances 0.000 title claims abstract description 27
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 239000000843 powder Substances 0.000 claims abstract description 37
- 239000011347 resin Substances 0.000 claims abstract description 22
- 229920005989 resin Polymers 0.000 claims abstract description 22
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 17
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 16
- 229920001896 polybutyrate Polymers 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 13
- 239000004611 light stabiliser Substances 0.000 claims abstract description 7
- 241000196324 Embryophyta Species 0.000 claims description 21
- -1 citric acid ester Chemical class 0.000 claims description 8
- 239000006057 Non-nutritive feed additive Substances 0.000 claims description 7
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 6
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 6
- 241001330002 Bambuseae Species 0.000 claims description 6
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 6
- 239000011425 bamboo Substances 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 239000002023 wood Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Natural products OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 4
- 239000001023 inorganic pigment Substances 0.000 claims description 4
- 239000000155 melt Substances 0.000 claims description 4
- 239000012860 organic pigment Substances 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- 239000002904 solvent Substances 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- PWWSSIYVTQUJQQ-UHFFFAOYSA-N distearyl thiodipropionate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCSCCC(=O)OCCCCCCCCCCCCCCCCCC PWWSSIYVTQUJQQ-UHFFFAOYSA-N 0.000 claims description 3
- 239000010902 straw Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000004970 Chain extender Substances 0.000 claims description 2
- 239000002656 Distearyl thiodipropionate Substances 0.000 claims description 2
- 241000598860 Garcinia hanburyi Species 0.000 claims description 2
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 claims description 2
- 235000021355 Stearic acid Nutrition 0.000 claims description 2
- 230000002745 absorbent Effects 0.000 claims description 2
- 239000002250 absorbent Substances 0.000 claims description 2
- 150000001412 amines Chemical class 0.000 claims description 2
- IRERQBUNZFJFGC-UHFFFAOYSA-L azure blue Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[S-]S[S-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] IRERQBUNZFJFGC-UHFFFAOYSA-L 0.000 claims description 2
- 239000006229 carbon black Substances 0.000 claims description 2
- XCJYREBRNVKWGJ-UHFFFAOYSA-N copper(II) phthalocyanine Chemical compound [Cu+2].C12=CC=CC=C2C(N=C2[N-]C(C3=CC=CC=C32)=N2)=NC1=NC([C]1C=CC=CC1=1)=NC=1N=C1[C]3C=CC=CC3=C2[N-]1 XCJYREBRNVKWGJ-UHFFFAOYSA-N 0.000 claims description 2
- 235000019305 distearyl thiodipropionate Nutrition 0.000 claims description 2
- 229940117709 gamboge Drugs 0.000 claims description 2
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 claims description 2
- RKISUIUJZGSLEV-UHFFFAOYSA-N n-[2-(octadecanoylamino)ethyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCCNC(=O)CCCCCCCCCCCCCCCCC RKISUIUJZGSLEV-UHFFFAOYSA-N 0.000 claims description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 2
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 claims description 2
- 239000008117 stearic acid Substances 0.000 claims description 2
- 239000004408 titanium dioxide Substances 0.000 claims description 2
- 239000000126 substance Substances 0.000 abstract description 7
- 239000000835 fiber Substances 0.000 abstract description 6
- 239000004744 fabric Substances 0.000 abstract description 5
- 238000013461 design Methods 0.000 abstract description 4
- 239000004753 textile Substances 0.000 abstract description 4
- 239000000088 plastic resin Substances 0.000 abstract description 3
- 230000008092 positive effect Effects 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 8
- 239000004033 plastic Substances 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 5
- 239000004743 Polypropylene Substances 0.000 description 4
- 229920001155 polypropylene Polymers 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 241000219000 Populus Species 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229920006238 degradable plastic Polymers 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- VNFXPOAMRORRJJ-UHFFFAOYSA-N (4-octylphenyl) 2-hydroxybenzoate Chemical compound C1=CC(CCCCCCCC)=CC=C1OC(=O)C1=CC=CC=C1O VNFXPOAMRORRJJ-UHFFFAOYSA-N 0.000 description 1
- 208000034530 PLAA-associated neurodevelopmental disease Diseases 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000009941 weaving 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
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a degradable composite material with a flocking simulating effect and a preparation method thereof, wherein the degradable composite material comprises the following components in percentage by weight: 45-65 parts of PLA resin; 35-55 parts of PBAT resin; 2-6 parts of plant powder; 0.5-5 parts of a compatilizer; 0.1-1 part of antioxidant; 0.1-1 part of light stabilizer. The invention has the following positive effects: 1. the plant powder is adopted to replace chemical fiber, is added into plastic resin, is combined with texture design, has a flocking simulating effect, and can replace textile fabric coated interior trim parts. 2. The plant powder, the PLA resin and the PBAT resin all have biodegradability, so that the prepared material with the flocking simulating effect has complete biodegradability. 3. The prepared degradable composite material with the flocking-imitating effect has excellent rigidity and toughness balance performance and can meet the mechanical performance requirements of most automobile interior parts.
Description
Technical Field
The invention relates to the technical field of high polymer material modification, in particular to a degradable composite material with a flocking simulating effect and a preparation method thereof.
Background
The polypropylene is one of the most important general plastics due to light weight, low cost, easy processing and molding and good comprehensive performance, and the modified polypropylene material is widely applied to automotive upholsteries. Many automotive upholsteries are usually covered with textile fabrics to improve the high-grade and luxurious feeling of the upholsteries, but the process is complicated, the productivity is reduced, and the cost is increased. Therefore, many host plants are developing materials having a flocking-imitating effect, and have gradually started using chemical short fiber-modified polypropylene materials having a flocking-imitating effect.
With the increasing resource and environmental problems, degradable plastics become the hottest development direction of the current plastics industry. Wherein PLA and PBAT are superior in degradable plastics, have good processability and have great potential to replace polypropylene materials with larger amount in automobile plastics. Plant powder, such as crop straw powder, is a byproduct of agricultural production, the treatment efficiency of crushing and returning the plant powder to the field as fertilizer is low, and the incineration treatment causes resource waste and atmospheric environment pollution. The wood powder and bamboo powder are the residual products after processing wood and bamboo. The plant powder is subjected to thermal degradation in different degrees in the processing process at the temperature of more than 100 ℃, so that the color is changed from light color to dark color, and the plant powder can be added into plastic resin and has a flocking simulating effect. PLA, PBAT and plant powder all have complete biodegradability, are prepared into materials with a flocking-imitating effect, are combined with texture design to prepare automobile interior parts with the flocking-imitating effect, replace fabric-coated products, and accord with the concepts of environmental friendliness and sustainable development.
Disclosure of Invention
The invention mainly aims to provide a degradable composite material with a flocking simulating effect, the material realizes complete biodegradation and environmental friendliness, and the effect of weaving flannelette is simulated by adding plant powder and combining texture design, so that the aim of removing plastic feeling is fulfilled.
The invention also aims to provide a preparation method of the degradable composite material with the flocking simulating effect.
In order to achieve the purpose, the invention adopts the following technical scheme:
a degradable composite material with a flocking simulating effect is prepared from the following raw materials in parts by weight:
PLA resin: 45-65 parts of a solvent;
PBAT resin: 35-55 parts of a solvent;
plant powder: 2-6 parts;
processing aid: 0.5-5 parts;
antioxidant: 0.1-1 part;
the flocking imitating effect of the invention is similar to the effect that a plastic piece is coated by a layer of textile fabric in visual effect.
The PLA resin is L-shaped PLA, has optical purity of more than or equal to 96 percent and melt index of 10-70g/min at 210 ℃ and under the condition of 2.16 kg.
The PBAT resin has a melt index of 2-30g/min at 210 ℃ and 2.16 kg.
The plant powder is one or a mixture of a plurality of crop straw powder, tree wood powder and bamboo powder, and the particle size of more than 95 percent of the plant powder is distributed between 0.1 and 0.6 mm.
The processing aid is one or a mixture of more of a chain extender, a compatibilizer, citric acid ester, stearic acid and ethylene bis stearamide.
The antioxidant consists of a main antioxidant and an auxiliary antioxidant which are mixed in any ratio, wherein the main antioxidant is pentaerythritol ester; the auxiliary antioxidant is at least one of phosphorous tris (2, 4-di-tert-butylphenyl) phosphite and distearyl thiodipropionate.
The light stabilizer is compounded by hindered amine and ultraviolet absorbent.
The material is mainly used for automotive upholstery, and is often made into light color in consideration of appearance effect, so that the material also comprises trace organic pigment or inorganic pigment. The organic pigment is selected from at least one of permanent red, gamboge, phthalocyanine blue and phthalocyanine green, and the inorganic pigment is selected from at least one of titanium dioxide, carbon black, iron oxide red and ultramarine.
A preparation method of a degradable composite material with a flocking simulating effect comprises the following specific steps:
PLA resin, PBAT resin, plant powder, processing aid, antioxidant, light stabilizer and the like are weighed according to the proportion, firstly put into a high-speed mixing machine for mixing for 5-10min, and then put into a double-screw extruder, wherein the processing temperature is 100-. And finally, cooling by a water tank and granulating by a granulator.
Compared with the prior art, the invention has the following positive effects:
1. the plant powder is adopted to replace chemical fiber, is added into plastic resin, is combined with texture design, has a flocking simulating effect, and can replace textile fabric coated interior trim parts.
2. The plant powder, the PLA resin and the PBAT resin all have biodegradability, so that the prepared material with the flocking simulating effect has complete biodegradability.
Detailed Description
The invention aims to provide a preparation method of a degradable composite material with a flocking simulating effect. The following are examples and comparative examples by which the technical solution of the present invention can be further understood. The invention is not to be so limited, and all equivalent and equivalent modifications are intended to be included within the scope of the present invention.
The raw materials used for examples 1-5 and comparative example 1 were as follows:
PLA resin: the melt index is 60g/min, the test conditions are 210 ℃ and 2.16kg, and the product is commercially available;
PBAT resin: the melt index is 8g/min, the test conditions are 210 ℃ and 2.16kg, and the product is commercially available;
plant powder 1: the poplar wood powder is sold in the market, and the mesh number of the poplar wood powder is 40 meshes;
plant powder 2: bamboo powder with 60 meshes is sold in market;
chemical short fiber: is sold on the market;
processing aids, compatibilizers, commercially available;
antioxidant: DSTP and 168, commercially available;
light stabilizer: p-octylphenyl salicylate, commercially available.
Examples 1 to 5 and comparative example 1
The raw materials are firstly put into a high-speed mixing machine with the rotating speed of about 800rpm according to the weight percentage shown in the table 1 for mixing for 5min, and then are put into a double-screw extruder, the processing temperature is 200 ℃ and 210 ℃, and the rotating speed of a main machine is 500 rpm. And finally, cooling by a water tank and granulating by a granulator. And (3) injection molding the obtained degradable composite material into a leather-grain plate, observing the flocking-imitating effect on the surface, injection molding into an ISO standard sample strip, and evaluating the performance according to the test standards and conditions in the table 2.
TABLE 1 ingredients of degradable composite material with flocking imitating effect (the contents of the ingredients in the table are in weight percent)
| Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | |
| PLA resin | 60 | 70 | 30 | 60 | 60 | 60 | 60 | 65 | 50 |
| PBAT resins | 40 | 30 | 70 | 40 | 40 | 40 | 40 | 35 | 50 |
| Poplar powder | 3 | 3 | 1 | 3 | 6 | 2 | |||
| Bamboo powder | 3 | 2 | |||||||
| Chemical short fiber | 3 | ||||||||
| Compatibilizer | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Antioxidant agent | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 |
| Light stabilizers | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | O.3 | 0.3 |
TABLE 2 evaluation results of degradable composite materials having flocking-imitating effect
Table 2 shows the evaluation results of the degradable composite material with the effect of flocking simulation, and the effect of flocking simulation of the material made of plant powder is comparable to that of the chemical short fiber in appearance, and the chemical short fiber is not a degradable material, and the composite material with the effect of flocking simulation filled with plant powder in examples 1 to 5 can be completely degraded. It can be seen from comparative examples 2 and 3 that the ratio of PLA to PBAT has a great influence on the mechanical properties of the composite material, and only within the range of the ratio described in the patent, the degradable composite material with excellent rigidity and toughness balance performance and the flocking-imitating effect can be prepared, and the requirements on the mechanical properties of most automobile interior parts can be met.
Claims (10)
1. The utility model provides a degradable combined material with imitative flocking effect which characterized in that: the composition is prepared from the following raw materials in parts by weight:
PLA resin: 45-65 parts of a solvent;
PBAT resin: 35-55 parts of a solvent;
plant powder: 2-6 parts;
processing aid: 0.5-5 parts;
antioxidant: 0.1 to 1 portion.
2. The degradable composite material with the imitated flocking effect is characterized in that: the PLA resin is L-shaped PLA, has optical purity of more than or equal to 96 percent and melt index of 10-70g/min at 210 ℃ and under the condition of 2.16 kg.
3. The degradable composite material with the imitated flocking effect is characterized in that: the PBAT resin has a melt index of 2-30g/min at 210 ℃ and 2.16 kg.
4. The degradable composite material with the imitated flocking effect is characterized in that: the plant powder is one or a mixture of a plurality of crop straw powder, tree wood powder and bamboo powder, and the particle size of more than 95 percent of the plant powder is distributed between 0.1 and 0.6 mm.
5. The degradable composite material with the imitated flocking effect is characterized in that: the processing aid is one or a mixture of more of a chain extender, a compatibilizer, citric acid ester, stearic acid and ethylene bis stearamide.
6. The degradable composite material with the imitated flocking effect is characterized in that: the antioxidant consists of a main antioxidant and an auxiliary antioxidant which are mixed in any ratio, wherein the main antioxidant is pentaerythritol ester; the auxiliary antioxidant is at least one of phosphorous tris (2, 4-di-tert-butylphenyl) phosphite and distearyl thiodipropionate.
7. The degradable composite material with the imitated flocking effect is characterized in that: the light stabilizer is compounded by hindered amine and ultraviolet absorbent.
8. The degradable composite material with the imitated flocking effect is characterized in that: also comprises trace organic pigment or inorganic pigment.
9. The degradable composite material with the imitated flocking effect is characterized in that: the organic pigment is selected from at least one of permanent red, gamboge, phthalocyanine blue and phthalocyanine green, and the inorganic pigment is selected from at least one of titanium dioxide, carbon black, iron oxide red and ultramarine.
10. The preparation method of the degradable composite material with the imitated flocking effect as claimed in any one of claims 1 to 9, is characterized by comprising the following specific steps:
PLA resin, PBAT resin, plant powder, processing aid, antioxidant, light stabilizer and the like are weighed according to the proportion, firstly put into a high-speed mixing machine for mixing for 5-10min, and then put into a double-screw extruder, wherein the processing temperature is 100-. And finally, cooling by a water tank and granulating by a granulator.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113150521A (en) * | 2021-05-08 | 2021-07-23 | 汕头市春叶新材料环保有限公司 | High-toughness biodegradable composite material, and preparation device and method thereof |
| CN114395224A (en) * | 2021-12-28 | 2022-04-26 | 浙江普利特新材料有限公司 | Degradable antibacterial flocking-imitating composite material for automobile and preparation method thereof |
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| CN113150521A (en) * | 2021-05-08 | 2021-07-23 | 汕头市春叶新材料环保有限公司 | High-toughness biodegradable composite material, and preparation device and method thereof |
| CN113150521B (en) * | 2021-05-08 | 2022-01-25 | 江西昕禾生态科技有限公司 | High-toughness biodegradable composite material, and preparation device and method thereof |
| CN114395224A (en) * | 2021-12-28 | 2022-04-26 | 浙江普利特新材料有限公司 | Degradable antibacterial flocking-imitating composite material for automobile and preparation method thereof |
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