CN112409689A - Sound-absorbing noise-reducing polypropylene porous sound-absorbing material and preparation method thereof - Google Patents
Sound-absorbing noise-reducing polypropylene porous sound-absorbing material and preparation method thereof Download PDFInfo
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- CN112409689A CN112409689A CN202011296677.6A CN202011296677A CN112409689A CN 112409689 A CN112409689 A CN 112409689A CN 202011296677 A CN202011296677 A CN 202011296677A CN 112409689 A CN112409689 A CN 112409689A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/30—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by mixing gases into liquid compositions or plastisols, e.g. frothing with air
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0066—Use of inorganic compounding ingredients
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/009—Use of pretreated compounding ingredients
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/12—Polypropene
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- 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
- C08K3/16—Halogen-containing compounds
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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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
- C08K7/26—Silicon- containing compounds
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- C—CHEMISTRY; METALLURGY
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- C08K9/04—Ingredients treated with organic substances
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Abstract
The invention discloses a sound absorption and noise reduction polypropylene porous material which is prepared from the following raw materials in parts by weight: 25-35 parts of modified diatomite, 60-80 parts of polypropylene, 12-18 parts of sodium chloride and 12-18 parts of foaming agent. The preparation method of the sound absorption and noise reduction polypropylene porous material comprises three steps of diatomite organic modification, material mixing, melt blending and extrusion granulation, wherein polypropylene is foamed into the porous material in a double-screw extruder, the modified diatomite is used as a filling agent, specifically, the diatomite is subjected to high-temperature roasting, acid washing and coupling agent organic modification, so that the adsorption capacity and the binding capacity with the polypropylene are improved, the foam structure of polypropylene foam is improved through designing a raw material mixing process and a foaming process, the sound absorption effect of the polypropylene foam is improved, and the sound absorption and noise reduction polypropylene porous material with good compressive strength, high sound absorption coefficient and wide absorption frequency range is obtained. The method has the advantages of low cost, simple process, easy operation and convenient production realization.
Description
Technical Field
The invention belongs to the field of polymer composite materials, and particularly relates to a sound absorption and noise reduction polypropylene porous sound absorption material and a preparation method thereof.
Background
All the sounds interfering with people are noises, which obstruct people from normally resting, studying and working. With the increasing development of industrialization and mechanization, noise pollution is more and more common in daily life environments. The long-time noise contact can interfere the normal rest and sleep of people, reduce the work efficiency of people, damage the auditory organs of people, damage the cardiovascular system of people, cause the disorder of cerebral cortex of people, abnormal conditioned reflex, symptoms such as dizziness, tinnitus, insomnia, palpitation, hypomnesis, inattention and the like, and serious people generate the condition of mental disorder, thereby causing the functional disorder of the nervous system and the functional disorder of the endocrine system and seriously harming the health of human bodies. Under the condition that the noise decibel can not be controlled or reduced, the sound absorption and noise reduction material is applied to relevant places or equipment to be a more effective solution. The sound absorption and noise reduction material utilizes the self porosity, the film action or the resonance action to match with the sound characteristic impedance of the surrounding sound transmission medium, so that sound energy enters without reflection, and most of incident sound energy is absorbed to achieve the effects of sound absorption and noise reduction.
The existing sound absorption materials comprise perforated or closed-cell inorganic and metal materials and high-molecular porous sound absorption materials, wherein the perforated or closed-cell inorganic and metal materials have higher density, the construction process is more complex, and the high-molecular porous sound absorption materials are relatively more widely applied. The polypropylene is a thermoplastic synthetic resin with excellent performance, the density is 0.90-0.92 g/cm, the polypropylene is the lightest of all chemical fibers, and the polypropylene has the advantages of chemical resistance, heat resistance, electrical insulation, high-strength mechanical property, good high-wear-resistance processing performance and the like, is excellent in environmental reliability, and can be rapidly and widely developed and applied in various fields such as machinery, automobiles, electronic appliances, buildings, textiles, packaging, agriculture, forestry, fishery, food industry and the like since the advent. Therefore, the research on a polypropylene porous sound absorption material is the focus of sound absorption material research.
Disclosure of Invention
The invention aims to provide a sound absorption and noise reduction polypropylene porous material and a preparation method thereof.
The purpose of the invention can be realized by the following technical scheme:
the sound absorption and noise reduction polypropylene porous material is prepared from the following raw materials in parts by weight: 25-35 parts of modified diatomite, 60-80 parts of polypropylene, 12-18 parts of sodium chloride and 12-18 parts of foaming agent.
The preparation method of the sound absorption and noise reduction polypropylene porous material comprises the following steps:
step 1: organic modification of diatomite: placing diatomite into an oven for drying, placing the diatomite into a muffle furnace for high-temperature roasting, placing the cooled diatomite into a concentrated sulfuric acid solution, simultaneously adding calcium stearate, soaking at the temperature of 80-95 ℃, filtering out water, washing to be neutral, then adding the obtained product into a cetyl trimethyl ammonium bromide solution, uniformly stirring, carrying out ultrasonic treatment for 2 hours at the temperature of 60 ℃, cooling, washing and drying in a vacuum oven;
step 2: mixing materials: putting the modified diatomite processed in the step 1, sodium chloride, a foaming agent and polypropylene into a ball mill, and grinding and mixing uniformly;
step 3: melt blending and extrusion granulation: and (3) feeding the mixed material processed in the step (2) into a double-screw extruder, and carrying out melt blending and extrusion granulation to obtain the sound-absorbing noise-reducing polypropylene porous material.
Further, in step 1, the muffle furnace is baked for 3 hours at the temperature of 450 ℃.
Further, in the step 1, the concentration of the concentrated sulfuric acid is 60-90%.
Further, in the step 1, the mass ratio of the diatomite to the calcium stearate is 8-20: 1-2.
Further, in the step 1, the mass fraction of the cetyl trimethyl ammonium bromide solution is 1-15%.
Further, in the step 1, the solid-to-liquid ratio of the obtained product to the cetyl trimethyl ammonium bromide solution is 1: 2-5.
Further, in step 2, the foaming agent is one or a mixture of two of sodium dodecyl sulfate and ethoxylated sodium alkyl sulfate.
Further, in the step 2, the rotating speed of the grinding machine is controlled to be 500r/min, and the grinding is carried out for 6-8 h.
Further, in step 3, the extruder heating temperature is as follows: the first zone is 150-.
The invention has the beneficial effects that:
the invention adopts polypropylene to foam into a porous material in a double-screw extruder, takes modified diatomite as a filler, and concretely, improves the adsorption capacity and the binding capacity with polypropylene of the diatomite through high-temperature roasting, acid washing and organic modification by adding a coupling agent, improves the cellular structure of polypropylene foam through designing a raw material mixing process and a foaming process, increases the sound absorption effect of the polypropylene foam, and obtains the sound absorption and noise reduction polypropylene porous material with good compressive strength, high sound absorption coefficient and wide absorption frequency range. The method has the advantages of low cost, simple process, easy operation and convenient production realization.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the examples of the present invention, and not all of the 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.
Example 1
Raw materials: 25 parts of modified diatomite, 60 parts of polypropylene, 12 parts of sodium chloride and 12 parts of lauryl sodium sulfate.
The preparation method comprises the following steps:
step 1: organic modification of diatomite: placing diatomite into an oven for drying, placing the diatomite into a muffle furnace for roasting at the high temperature of 450 ℃ for 3h, placing the diatomite into 70% concentrated sulfuric acid solution after cooling, simultaneously adding calcium stearate, soaking the diatomite and the calcium stearate at the mass ratio of 20:1 and the temperature of 80 ℃, filtering, washing the obtained product until the obtained product is neutral, then adding the obtained product into 10% hexadecyl trimethyl ammonium bromide solution at the mass ratio of 1:5, uniformly stirring the obtained product, performing ultrasonic treatment at the temperature of 60 ℃ for 2h, cooling, washing and drying the obtained product in a vacuum oven;
step 2: mixing materials: putting the modified diatomite processed in the step 1, sodium chloride, foaming agent and polypropylene into a ball mill, grinding for 6 hours at the rotating speed of 500r/min, and uniformly mixing;
step 3: melt blending and extrusion granulation: and (3) feeding the mixed material obtained in the step (2) into a double-screw extruder, wherein the heating temperature of the extruder is as follows: carrying out melt blending and extrusion granulation in a first area of 155 ℃, a second area of 160 ℃, a third area of 160 ℃, a fourth area of 165 ℃, a fifth area of 165 ℃, a sixth area of 165 ℃, a seventh area of 170 ℃, an eighth area of 170 ℃ and a machine head of 175 ℃ to obtain the sound-absorbing noise-reducing polypropylene porous material.
Example 2:
raw materials: 30 parts of modified diatomite, 70 parts of polypropylene, 15 parts of sodium chloride and 15 parts of lauryl sodium sulfate.
The preparation method comprises the following steps:
step 1: organic modification of diatomite: placing diatomite into an oven for drying, placing the diatomite into a muffle furnace for roasting at the high temperature of 450 ℃ for 3h, placing the diatomite into 70% concentrated sulfuric acid solution after cooling, simultaneously adding calcium stearate, soaking the diatomite and the calcium stearate at the mass ratio of 20:1 and the temperature of 80 ℃, filtering, washing the obtained product until the obtained product is neutral, then adding the obtained product into 10% hexadecyl trimethyl ammonium bromide solution at the mass ratio of 1:5, uniformly stirring the obtained product, performing ultrasonic treatment at the temperature of 60 ℃ for 2h, cooling, washing and drying the obtained product in a vacuum oven;
step 2: mixing materials: putting the modified diatomite processed in the step 1, sodium chloride, foaming agent and polypropylene into a ball mill, grinding for 6 hours at the rotating speed of 500r/min, and uniformly mixing;
step 3: melt blending and extrusion granulation: and (3) feeding the mixed material obtained in the step (2) into a double-screw extruder, wherein the heating temperature of the extruder is as follows: carrying out melt blending and extrusion granulation in a first area of 155 ℃, a second area of 160 ℃, a third area of 160 ℃, a fourth area of 165 ℃, a fifth area of 165 ℃, a sixth area of 165 ℃, a seventh area of 170 ℃, an eighth area of 170 ℃ and a machine head of 175 ℃ to obtain the sound-absorbing noise-reducing polypropylene porous material.
Example 3:
raw materials: 30 parts of modified diatomite, 80 parts of polypropylene, 18 parts of sodium chloride and 18 parts of lauryl sodium sulfate.
The preparation method comprises the following steps:
step 1: organic modification of diatomite: placing diatomite into an oven for drying, placing the diatomite into a muffle furnace for roasting at the high temperature of 450 ℃ for 3h, placing the diatomite into 70% concentrated sulfuric acid solution after cooling, simultaneously adding calcium stearate, soaking the diatomite and the calcium stearate at the mass ratio of 20:1 and the temperature of 80 ℃, filtering, washing the obtained product until the obtained product is neutral, then adding the obtained product into 10% hexadecyl trimethyl ammonium bromide solution at the mass ratio of 1:5, uniformly stirring the obtained product, performing ultrasonic treatment at the temperature of 60 ℃ for 2h, cooling, washing and drying the obtained product in a vacuum oven;
step 2: mixing materials: putting the modified diatomite processed in the step 1, sodium chloride, foaming agent and polypropylene into a ball mill, grinding for 6 hours at the rotating speed of 500r/min, and uniformly mixing;
step 3: melt blending and extrusion granulation: and (3) feeding the mixed material obtained in the step (2) into a double-screw extruder, wherein the heating temperature of the extruder is as follows: carrying out melt blending and extrusion granulation in a first area of 155 ℃, a second area of 160 ℃, a third area of 160 ℃, a fourth area of 165 ℃, a fifth area of 165 ℃, a sixth area of 165 ℃, a seventh area of 170 ℃, an eighth area of 170 ℃ and a machine head of 175 ℃ to obtain the sound-absorbing noise-reducing polypropylene porous material.
Comparative example:
raw materials: 60 parts of polypropylene, 12 parts of sodium chloride and 12 parts of sodium dodecyl sulfate.
The preparation method comprises the following steps:
step 1: mixing materials: putting sodium chloride, a foaming agent and polypropylene into a ball mill, grinding for 6 hours at the rotating speed of 500r/min, and uniformly mixing;
step 2: melt blending and extrusion granulation: and (2) feeding the mixed material obtained in the step (1) into a double-screw extruder, wherein the heating temperature of the extruder is as follows: and carrying out melt blending and extrusion granulation on the polypropylene porous material at 155 ℃ in one area, 160 ℃ in two areas, 160 ℃ in three areas, 165 ℃ in four areas, 165 ℃ in five areas, 165 ℃ in six areas, 170 ℃ in seven areas, 170 ℃ in eight areas and 175 ℃ in a machine head to obtain the sound-absorbing and noise-reducing polypropylene porous material.
The sound absorption performance and the compression strength were measured in examples 1 to 3 and comparative example 1, in which the sound absorption performance was measured by referring to the test method of GB/T18696.1-2004 and the compression strength was measured by using a WDW-100 type universal material tester, and the results were as follows.
Table 1 results of sound absorption performance and compression strength test of examples 1 to 3 and comparative example 1
The high-efficiency sound absorption frequency width is the frequency with the sound absorption coefficient larger than 0.56 on the sound absorption coefficient curve.
As can be seen from Table 1, the polypropylene porous material of the present invention has excellent sound absorption and noise reduction performance, high sound absorption efficiency and wide frequency range,
in the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention as defined in the accompanying claims.
Claims (9)
1. The sound absorption and noise reduction polypropylene porous material is characterized by being prepared from the following raw materials in parts by weight:
25-35 parts of modified diatomite, 60-80 parts of polypropylene, 12-18 parts of sodium chloride and 12-18 parts of foaming agent;
the preparation method of the sound absorption and noise reduction polypropylene porous material comprises the following steps:
step 1: organic modification of diatomite: drying diatomite in an oven at 85 ℃ for 2 hours, then placing the diatomite in a muffle furnace for high-temperature roasting, placing the cooled diatomite in a concentrated sulfuric acid solution, simultaneously adding calcium stearate, soaking at 80-95 ℃, then filtering out water, washing to be neutral, then adding the obtained product into a cetyl trimethyl ammonium bromide solution, uniformly stirring, carrying out ultrasonic treatment at 60 ℃ for 2 hours, cooling, washing and drying in a vacuum oven at 85 ℃ for 2 hours;
step 2: mixing materials: putting the modified diatomite processed in the step 1, sodium chloride, a foaming agent and polypropylene into a ball mill, and grinding and mixing uniformly;
step 3: melt blending and extrusion granulation: and (3) feeding the mixed material processed in the step (2) into a double-screw extruder through a feeding port, and carrying out melt blending and extrusion granulation to obtain the sound-absorbing noise-reducing polypropylene porous material.
2. The sound absorption and noise reduction polypropylene porous material and the preparation method thereof according to claim 1, wherein in the step 1, the muffle furnace is roasted for 3 hours at a temperature of 450 ℃.
3. The sound absorption and noise reduction polypropylene porous material and the preparation method thereof according to claim 1, wherein in the step 1, the concentration of concentrated sulfuric acid is 60-90%.
4. The sound absorption and noise reduction polypropylene porous material and the preparation method thereof as claimed in claim 1, wherein in the step 1, the mass ratio of the diatomite to the calcium stearate is 8-20: 1-2.
5. The sound absorption and noise reduction polypropylene porous material and the preparation method thereof as claimed in claim 1, wherein in the step 1, the mass fraction of the cetyl trimethyl ammonium bromide solution is 1-15%.
6. The sound absorption and noise reduction polypropylene porous material and the preparation method thereof as claimed in claim 1, wherein in the step 1, the solid-to-liquid ratio of the obtained product to the cetyl trimethyl ammonium bromide solution is 1: 2-5.
7. The sound absorption and noise reduction polypropylene porous material and the preparation method thereof according to claim 1, wherein in the step 2, the foaming agent is one or a mixture of two of sodium dodecyl sulfate and sodium alkyl sulfate ethoxylate.
8. The sound absorption and noise reduction polypropylene porous material and the preparation method thereof according to claim 1, wherein in the step 2, the rotation speed of a grinding machine is controlled to be 500r/min, and the grinding is carried out for 6-8 h.
9. The sound absorption and noise reduction polypropylene porous material and the preparation method thereof according to claim 1, wherein in the step 3, the heating temperature of an extruder is as follows: the first zone is 150-.
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| CN202011296677.6A CN112409689A (en) | 2020-11-18 | 2020-11-18 | Sound-absorbing noise-reducing polypropylene porous sound-absorbing material and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114516988A (en) * | 2022-02-24 | 2022-05-20 | 天津金发新材料有限公司 | Medium-frequency sound-absorbing polypropylene composition and preparation method and application thereof |
| CN115160690A (en) * | 2022-07-04 | 2022-10-11 | 珩大科技(上海)有限公司 | Material capable of changing color after adsorbing acid and alkali |
-
2020
- 2020-11-18 CN CN202011296677.6A patent/CN112409689A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114516988A (en) * | 2022-02-24 | 2022-05-20 | 天津金发新材料有限公司 | Medium-frequency sound-absorbing polypropylene composition and preparation method and application thereof |
| CN114516988B (en) * | 2022-02-24 | 2023-06-06 | 天津金发新材料有限公司 | Medium-frequency sound-absorbing polypropylene composition and preparation method and application thereof |
| WO2023160495A1 (en) * | 2022-02-24 | 2023-08-31 | 天津金发新材料有限公司 | Intermediate-frequency-sound-absorbing polypropylene composition, and preparation method therefor and use thereof |
| CN115160690A (en) * | 2022-07-04 | 2022-10-11 | 珩大科技(上海)有限公司 | Material capable of changing color after adsorbing acid and alkali |
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