CN113817267A - Polypropylene composite material with efficient sound insulation and antibacterial properties and preparation method and application thereof - Google Patents
Polypropylene composite material with efficient sound insulation and antibacterial properties and preparation method and application thereof Download PDFInfo
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- CN113817267A CN113817267A CN202111148781.5A CN202111148781A CN113817267A CN 113817267 A CN113817267 A CN 113817267A CN 202111148781 A CN202111148781 A CN 202111148781A CN 113817267 A CN113817267 A CN 113817267A
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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
- C08K9/10—Encapsulated ingredients
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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
- C08K3/02—Elements
- C08K3/04—Carbon
- C08K3/042—Graphene or derivatives, e.g. graphene oxides
Abstract
The invention discloses a polypropylene composite material with high-efficiency sound insulation and antibacterial properties, which comprises the following components in parts by weight: 50-96 parts of polypropylene resin and 4-40 parts of a coating material, wherein the coating material is diatomite coated graphene, and the graphene is pretreated graphene treated by an organic solvent. According to the invention, the pretreated graphene and the diatomite are premixed under specific conditions to prepare the coating material of the diatomite coated graphene, and then the coating material is melted and blended with other components such as PP and the like to prepare the polypropylene composite material, so that the problems of difficult dispersion and easy agglomeration of the graphene are solved, and the application of the graphene in PP materials is realized. The polypropylene composite material prepared by the formula and the method has excellent antibacterial property, sound insulation effect and better mechanical property, and can be used as an automotive interior material in the field of automobiles.
Description
Technical Field
The invention belongs to the technical field of modified plastics, and particularly relates to a polypropylene composite material with efficient sound insulation and antibacterial properties, and a preparation method and application thereof.
Background
Polypropylene (PP) materials are widely used in the field of automobile manufacturing due to their low specific gravity, excellent mechanical properties, low cost, easy processing, chemical resistance, etc. With the increasing industrial demand, in order to comply with the market demand, further improvement of various comprehensive properties of PP is required. Since the outbreak of new crown blight, people are more and more paying attention to products with antibacterial and antiviral functions, and accordingly, in the field of automobiles, consumers are more and more concerned about automobile interior materials with antibacterial and antiviral effects. However, the existing PP materials for preparing the automotive interior materials generally do not have antibacterial and antiviral functions, and the sound insulation effect of the PP materials still has a large improvement space.
Graphene is a single-layer two-dimensional crystalline material composed of tightly packed carbon atoms, and is the thinnest material found to date, with a thickness of about 0.335 nm. The smallest bacterium known today is 0.2 μm, which is about 600 times as large as graphene, and dies by instantaneously rupturing the cell wall as it travels over such sharp nanoscale two-dimensional material. The bacteriostatic effect of the graphene can not only be achieved through the insertion and cutting effect of the graphene on bacterial cell membranes, but also be achieved through large-scale direct extraction of phospholipid molecules on the cell membranes to destroy the cell membranes so as to kill bacteria, and therefore, the bacteria can be killed through physical and chemical modes. Although graphene has many excellent properties, graphene is very easy to agglomerate in the application process and is difficult to disperse uniformly, so that the application of graphene is greatly limited.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a polypropylene composite material with high-efficiency sound insulation and antibacterial properties, and a preparation method and application thereof.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a polypropylene composite material with high-efficiency sound insulation and antibacterial properties comprises the following components in parts by weight: 50-96 parts of polypropylene resin and 4-40 parts of a coating material, wherein the coating material is diatomite coated graphene, and the graphene is pretreated graphene treated by an organic solvent.
Preferably, in the coating material, the weight ratio of the graphene to the diatomite is 1: 30-1: 70.
More preferably, in the coating material, the weight ratio of the graphene to the diatomite is 1: 40-1: 60.
Most preferably, in the coating, the weight ratio of the graphene to the diatomite is 1: 50.
Preferably, the polypropylene composite material also comprises the following components in parts by weight: 0.1-3 parts of lubricant and 0.1-3 parts of antioxidant.
Preferably, the polypropylene composite material with high-efficiency sound insulation and antibacterial properties comprises the following components in parts by weight: 60-85 parts of polypropylene resin, 15-30 parts of coating material, 0.1-3 parts of lubricant and 0.1-3 parts of antioxidant.
Preferably, the polypropylene resin has a melt index > 3g/10min at 230 ℃ under 2.16kg test conditions. More preferably, the polypropylene resin has a melt index of 10-30 g/10min at 230 ℃ under a test condition of 2.16 kg. In the formula of the invention, when the PP with the parameters is adopted, the composite material with better sound insulation can be obtained.
Preferably, the lubricant is at least one of Ethylene Bis Stearamide (EBS) and erucamide.
Preferably, the antioxidant is at least one of hindered phenol antioxidants and phosphite antioxidants, and for example, the following grades can be selected: antioxidant SONOX 1010, antioxidant SONOX 168, antioxidant SONOX1076 and antioxidant DLTDP.
Preferably, the polypropylene composite material further comprises 0.1-3 parts by weight of other additives, wherein the other additives are heat stabilizers (such as organic tin heat stabilizers and calcium-zinc heat stabilizers) or/and light stabilizers (such as hindered amine light stabilizers, o-hydroxybenzophenone light stabilizers, benzotriazole light stabilizers and salicylate light stabilizers) and the like.
The invention also provides a preparation method of the polypropylene composite material with high-efficiency sound insulation and antibacterial properties, which comprises the following steps:
(1) dispersing graphene in an organic solvent, filtering, and drying filter residues to obtain pretreated graphene;
(2) uniformly mixing the pretreated graphene with diatomite to obtain a coating material of graphene coated by diatomite;
(3) and melting and blending the coating material and the other components, and granulating to obtain the polypropylene composite material.
Preferably, in the step (2), the pretreated graphene and the diatomite are mixed by a high-speed mixer at 40-60 ℃.
Preferably, in the step (3), the melt blending is carried out through an extruder, the length-diameter ratio of an extrusion screw is 36: 1-48: 1, the temperature of a first zone of the extruder is 80-120 ℃, the temperature of a second zone to a fifth zone of the extruder is 180-200 ℃, and the temperature of other zones of the extruder is 200-230 ℃.
According to the invention, the graphene is dispersed in the organic solvent, so that the effect of pre-dispersing the graphene is achieved. Therefore, agglomeration of graphene in the process of premixing with diatomite can be avoided.
Preferably, the organic solvent is at least one of dimethylacetamide, styrene, perchloroethylene, trichloroethylene, ethylene glycol ether, and triethanolamine.
The inventor discovers through experimental research that the diatomite and the pretreated graphene are premixed under the specific condition of 40-60 ℃, the graphene can be adsorbed into holes of the diatomite, the problem that the graphene is easy to agglomerate and difficult to disperse can be solved, the prepared coating material is easy to disperse uniformly with other materials, and therefore the graphene is added into a PP material, and the PP material is endowed with sterilization and antiviral functions.
Secondly, diatomaceous earth has a porous structure, and when sound waves are incident into diatomaceous earth, the sound waves can enter the interior of the material along its micropores and cause vibration of the air in the voids. Under the action of air viscous resistance, friction between air and hole wall, heat conduction and the like, partial sound energy is converted into heat energy to be lost, and the sound absorption effect is achieved. The inventor finds that after the premixing treatment, the diatomite with the graphene adsorbed in the holes has a remarkable and obvious absorption effect on the sound wave energy. On one hand, the energy of the sound wave can cause the resonance or the resonance of the graphene, so that the sound energy is rapidly absorbed; on the other hand, the graphene has good thermal performance, so that the acoustic energy can be quickly converted into heat energy, and the acoustic energy is quickly consumed to achieve better sound insulation and noise reduction effects.
The invention also provides application of the polypropylene composite material with high-efficiency sound insulation and antibacterial properties in automotive interior materials.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the pretreated graphene and the diatomite are premixed under specific conditions to prepare the coating material of the diatomite coated graphene, and then the coating material is melted and blended with other components such as PP and the like to prepare the polypropylene composite material, so that the problems of difficult dispersion and easy agglomeration of the graphene are solved, and the application of the graphene in PP materials is realized. The polypropylene composite material prepared by the formula and the method has excellent antibacterial property, sound insulation effect and better mechanical property, and can be used as an automotive interior material in the field of automobiles.
Detailed Description
The technical solutions of the present invention will be further described with reference to the following embodiments, and it should be apparent that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Unless otherwise specified, "parts" in examples and comparative examples mean "parts by weight".
The starting materials for the examples and comparative examples are commercially available from the following sources:
PP-A (Polypropylene resin A), type PP 8285E1, available from Exxonmobil, having ｃA melt index of 28g/10min at 230 ℃ under 2.16kg test conditions and ｃA tensile strength of 22MPｃA;
PP-B Polypropylene resin B), model PP K9017, available from Taiwan, having a melt index of 15g/10min at 230 ℃ under 2.16kg test conditions and a tensile strength of 20 MPa;
PP-C (Polypropylene resin C), model PP K9010, available from Taiwan, having a melt index of 10g/10min at 230 ℃ under 2.16kg test conditions and a tensile strength of 21 MPa;
PP-D (Polypropylene resin D), K8003 (Wuhan), available from Wuhan petrochemical, with a melt index of 3g/10min and a tensile strength of 22 MPa;
PP-E (Polypropylene resin E), PP 7555KNE2, available from Exxonmobil, melt index 50g/10min, tensile strength 25 MPa;
graphene, produced by Chengdu organic chemistry company of Chinese academy of sciences, has a thickness of 4-20 nm, a diameter of 2-16 μm and a specific surface area of 30-40 m2G, density 0.6g/cm3The purity is 99.5 percent;
diatomaceous earth, type Y-G500, available from Zhejiang energy New materials, Inc.;
lubricant: EBS, model universal, purchased from blue-juke chemical;
antioxidant: model SONOX 168, hindered phenol antioxidant, Shandong Linyi Sanfeng chemical;
antioxidant: model SONOX 1010, phosphite antioxidant, Shandong Linyi Sanfeng chemical industry;
light stabilizer: type LA-402AF, hindered amine light stabilizers, cyanogen specialty chemicals (shanghai) ltd.
Performance test standard:
tensile strength: test standard ISO 527-;
the antibacterial rate is as follows: test standard GB/T31402-2015;
sound insulation coefficient: test standard GB/T19889.1-2005 sound insulation test.
Examples 1 to 8
Embodiments 1 to 8 provide a polypropylene composite material, the weight part formula of which is shown in tables 1 to 2, and the preparation method comprises the following steps:
(1) dispersing graphene in dimethylacetamide, filtering, taking filter residues and drying to obtain pretreated graphene;
(2) putting the pretreated graphene and diatomite into a high-speed mixer, and premixing for 10min at 40-60 ℃ to obtain a coating material of graphene coated by diatomite; in the coating material, the weight ratio of graphene to diatomite is 1: 50; in the mixing process of the step, the graphene and the diatomite are easily and uniformly mixed, and the problem of agglomeration is avoided;
(3) putting the coating material, the polypropylene resin, the lubricant, the antioxidant and the light stabilizer into an extruder, and extruding and granulating after melt blending to prepare the polypropylene composite material; wherein the length-diameter ratio of an extrusion screw of the extruder is 45:1, the temperature of a first zone of the extruder is 80-120 ℃, the temperature of a second zone to a fifth zone of the extruder is 180-200 ℃, and the temperature of other zones of the extruder is 200-230 ℃.
Comparative examples 1 to 4 provide polypropylene composite materials, the weight part formulations of which are shown in table 2, and the preparation methods refer to the preparation methods of examples 1 to 8. The coating material of comparative example 4 is prepared by coating non-pretreated graphene with diatomite, and the weight ratio of the graphene to the diatomite is 1:50, and the coating method refers to the example.
TABLE 1
Note: in the table, "-" indicates that the component was not added, as follows.
TABLE 2
And (4) analyzing results: as can be seen from examples 1-4, in the polypropylene composite material formula of the present invention, the amount of the components has an influence on the performance of the obtained polypropylene composite material, wherein the mechanical property (tensile strength) and the sound insulation coefficient of example 3 are both excellent, and therefore, example 3 is used as a preferred formula. As can be seen from the examples 1 and 5 to 8, the type of the polypropylene resin also has an influence on the performance of the prepared polypropylene composite material; when the polypropylene resin with the melt index of 10-30 g/10min is adopted, the mechanical property and the sound insulation coefficient of the polypropylene composite material are better.
Compared with the method of independently adding the diatomite or the graphene, the composite material has the advantage that the antibacterial performance and the sound insulation effect of the composite material are improved.
As can be seen from example 1 and comparative example 4, in comparative example 4, the untreated graphene is directly mixed with the diatomite, so that the mechanical property, the antibacterial property and the sound insulation coefficient of the obtained polypropylene composite material are inferior to those of example 1, which indicates that the graphene subjected to the pre-dispersion treatment by the organic solvent has better dispersibility, thereby being more beneficial to the improvement of various properties of the composite material.
Secondly, in order to investigate the influence of the weight ratio of the graphene to the diatomite in the coating material on the performance of the polypropylene composite material, test groups 1-7 in a table 3 are designed. Coating materials are prepared according to the weight ratio of the test groups 1-7, the polypropylene composite material is prepared according to the formula of the embodiment 3, the performance of each prepared polypropylene composite material is tested, and the test results are shown in table 4.
TABLE 3
| Group of | Weight ratio of graphene to diatomaceous earth |
| Test group 1 | Graphene diatomaceous earth 1:20 |
| Test group 2 | Graphene diatomaceous earth 1:30 |
| Test group 3 | Graphene diatomaceous earth 1:40 |
| Test group 4 | Graphene diatomaceous earth 1:50 |
| Test group 5 | Graphene diatomaceous earth 1:60 |
| Test group 6 | Graphene diatomaceous earth 1:70 |
| Test group 7 | Graphene diatomaceous earth 1:80 |
TABLE 4
Table 4 data analysis: according to test groups 1-7, the PP composite material has better performance when the weight ratio of the graphene to the diatomite is 1: 30-1: 70; the weight ratio of the graphene to the diatomite is 1: 40-1: 60, and the PP composite material has better performance; when the weight ratio of the graphene to the diatomite is 1:50, the performance of the PP composite material is optimal.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. The polypropylene composite material with high-efficiency sound insulation and antibacterial properties is characterized by comprising the following components in parts by weight: 50-96 parts of polypropylene resin and 4-40 parts of a coating material, wherein the coating material is diatomite coated graphene, and the graphene is pretreated graphene treated by an organic solvent.
2. The polypropylene composite material with high-efficiency sound insulation and antibacterial properties as claimed in claim 1, wherein the coating material contains graphene and diatomite in a weight ratio of 1: 30-1: 70.
3. The polypropylene composite material with high-efficiency sound insulation and antibacterial properties as claimed in claim 2, wherein the coating material contains graphene and diatomite in a weight ratio of 1: 40-1: 60.
4. The polypropylene composite material with high-efficiency sound insulation and antibacterial properties according to claim 1, further comprising the following components in parts by weight: 0.1-3 parts of lubricant and 0.1-3 parts of antioxidant.
5. The polypropylene composite material with high-efficiency sound insulation and antibacterial properties according to any one of claims 1 to 4, wherein the polypropylene resin has a melt index of > 3g/10min at 230 ℃ under a test condition of 2.16 kg.
6. The polypropylene composite material with high-efficiency sound insulation and antibacterial properties according to claim 5, wherein the polypropylene resin has a melt index of 10-30 g/10min at 230 ℃ under a test condition of 2.16 kg.
7. The polypropylene composite material with high sound insulation and antibacterial properties according to claim 4, wherein the lubricant is at least one of ethylene bis stearamide and erucamide.
8. The polypropylene composite material with high-efficiency sound insulation and antibacterial properties as claimed in claim 4, wherein the antioxidant is at least one of hindered phenol antioxidant and phosphite antioxidant.
9. The method for preparing the polypropylene composite material with high-efficiency sound insulation and antibacterial properties according to any one of claims 1 to 8, comprising the following steps:
(1) dispersing graphene in an organic solvent, filtering, and drying filter residues to obtain pretreated graphene;
(2) uniformly mixing the pretreated graphene with diatomite to obtain a coating material of graphene coated by diatomite;
(3) and melting and blending the coating material and the other components, and granulating to obtain the polypropylene composite material.
10. Use of the polypropylene composite material with high-efficiency sound insulation and antibacterial properties as defined in any one of claims 1 to 8 in automotive interior materials.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108684708A (en) * | 2018-07-18 | 2018-10-23 | 中北大学 | A kind of preparation method of anti-biotic material |
| CN108822483A (en) * | 2018-07-23 | 2018-11-16 | 成都新柯力化工科技有限公司 | A kind of low VOC composite plastic for automobile interiors and preparation method of containing graphene |
| CN112538217A (en) * | 2020-12-09 | 2021-03-23 | 武汉金发科技有限公司 | Polypropylene composite material and preparation method thereof |
| CN112646274A (en) * | 2020-12-22 | 2021-04-13 | 武汉金发科技有限公司 | Polypropylene composite material and preparation method thereof |
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- 2021-09-28 CN CN202111148781.5A patent/CN113817267A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108684708A (en) * | 2018-07-18 | 2018-10-23 | 中北大学 | A kind of preparation method of anti-biotic material |
| CN108822483A (en) * | 2018-07-23 | 2018-11-16 | 成都新柯力化工科技有限公司 | A kind of low VOC composite plastic for automobile interiors and preparation method of containing graphene |
| CN112538217A (en) * | 2020-12-09 | 2021-03-23 | 武汉金发科技有限公司 | Polypropylene composite material and preparation method thereof |
| CN112646274A (en) * | 2020-12-22 | 2021-04-13 | 武汉金发科技有限公司 | Polypropylene composite material and preparation method thereof |
Non-Patent Citations (1)
| Title |
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| 武卫莉 等: "石墨烯-硅藻土改性PP复合材料的导电性能与力学性能", 《工程塑料应用》 * |
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