CN111662506A - Sound insulation material with electromagnetic shielding function, preparation method and electronic equipment - Google Patents
Sound insulation material with electromagnetic shielding function, preparation method and electronic equipment Download PDFInfo
- Publication number
- CN111662506A CN111662506A CN202010599303.5A CN202010599303A CN111662506A CN 111662506 A CN111662506 A CN 111662506A CN 202010599303 A CN202010599303 A CN 202010599303A CN 111662506 A CN111662506 A CN 111662506A
- Authority
- CN
- China
- Prior art keywords
- bamboo charcoal
- charcoal powder
- sound insulation
- mixture
- insulation material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000012774 insulation material Substances 0.000 title claims abstract description 48
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims abstract description 145
- 235000017491 Bambusa tulda Nutrition 0.000 claims abstract description 145
- 241001330002 Bambuseae Species 0.000 claims abstract description 145
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims abstract description 145
- 239000011425 bamboo Substances 0.000 claims abstract description 145
- 239000003610 charcoal Substances 0.000 claims abstract description 132
- 239000000843 powder Substances 0.000 claims abstract description 92
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 44
- 238000003763 carbonization Methods 0.000 claims abstract description 31
- 238000009413 insulation Methods 0.000 claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 claims abstract description 13
- 238000002791 soaking Methods 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 claims description 71
- 238000002156 mixing Methods 0.000 claims description 36
- 239000004088 foaming agent Substances 0.000 claims description 32
- 238000001125 extrusion Methods 0.000 claims description 22
- 238000005406 washing Methods 0.000 claims description 16
- 239000002253 acid Substances 0.000 claims description 11
- 239000002023 wood Substances 0.000 claims description 10
- 239000004156 Azodicarbonamide Substances 0.000 claims description 9
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 9
- XOZUGNYVDXMRKW-AATRIKPKSA-N azodicarbonamide Chemical group NC(=O)\N=N\C(N)=O XOZUGNYVDXMRKW-AATRIKPKSA-N 0.000 claims description 9
- 235000019399 azodicarbonamide Nutrition 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 9
- 229910017604 nitric acid Inorganic materials 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 9
- 239000002244 precipitate Substances 0.000 claims description 9
- 238000005303 weighing Methods 0.000 claims description 9
- 239000011810 insulating material Substances 0.000 claims description 8
- -1 polyethylene Polymers 0.000 claims description 7
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 claims description 5
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 claims description 5
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 claims description 5
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 5
- 239000004800 polyvinyl chloride Substances 0.000 claims description 5
- 239000004743 Polypropylene Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 229920000747 poly(lactic acid) Polymers 0.000 claims description 4
- 239000004626 polylactic acid Substances 0.000 claims description 4
- 229920001155 polypropylene Polymers 0.000 claims description 4
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 238000005452 bending Methods 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 238000005554 pickling Methods 0.000 claims description 2
- 238000010298 pulverizing process Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 9
- 239000002028 Biomass Substances 0.000 abstract description 3
- 230000002349 favourable effect Effects 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 230000020477 pH reduction Effects 0.000 abstract 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 17
- 229910052799 carbon Inorganic materials 0.000 description 16
- 239000000243 solution Substances 0.000 description 9
- 238000005187 foaming Methods 0.000 description 8
- 230000010355 oscillation Effects 0.000 description 7
- 238000001816 cooling Methods 0.000 description 6
- 238000005520 cutting process Methods 0.000 description 6
- 238000004513 sizing Methods 0.000 description 6
- 239000002131 composite material Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000004604 Blowing Agent Substances 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 229910021393 carbon nanotube Inorganic materials 0.000 description 1
- 239000002041 carbon nanotube Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 description 1
Classifications
-
- 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
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
- C08J9/10—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
- C08J9/102—Azo-compounds
- C08J9/103—Azodicarbonamide
-
- 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
- C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
-
- 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
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0073—Shielding materials
- H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
- H05K9/0083—Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising electro-conductive non-fibrous particles embedded in an electrically insulating supporting structure, e.g. powder, flakes, whiskers
-
- 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
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/04—N2 releasing, ex azodicarbonamide or nitroso compound
-
- 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
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/06—Polyethene
-
- 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
-
- 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
- C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08J2327/06—Homopolymers or copolymers of vinyl chloride
-
- 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
- C08J2355/00—Characterised by the use of homopolymers or copolymers, obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in groups C08J2323/00 - C08J2353/00
- C08J2355/02—Acrylonitrile-Butadiene-Styrene [ABS] polymers
-
- 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
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/04—Polyesters derived from hydroxy carboxylic acids, e.g. lactones
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Carbon And Carbon Compounds (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention is applicable to the technical field of sound insulation materials and electronic equipment, and provides a sound insulation material with an electromagnetic shielding function, a preparation method thereof and electronic equipment. The sound insulation material provided by the invention has the advantages of low manufacturing cost, low density, better mechanical property, sound insulation effect and electromagnetic shielding effect. Specifically, the bamboo charcoal powder obtained by biomass poly-generation is used as a raw material, the bamboo charcoal powder is subjected to water soaking and acidification treatment to remove ash content of the bamboo charcoal powder, and then the bamboo charcoal powder is subjected to secondary carbonization, so that the aperture of the bamboo charcoal can be enlarged, and the bamboo charcoal has certain conductivity, wherein the macroporous structure of the bamboo charcoal is favorable for forming an interlocking structure with thermoplastic resin, and the mechanical property of the sound insulation material is enhanced.
Description
Technical Field
The invention belongs to the technical field of sound insulation materials and electronic equipment, and particularly relates to a sound insulation material with an electromagnetic shielding function, a preparation method of the sound insulation material and electronic equipment.
Background
China is a big country of bamboo industry, and bamboo resources are abundant to prepare bamboo charcoal and bamboo charcoal composite materials. In order to comprehensively utilize energy, bamboo wood is applied to power generation in recent years, and poly-generation of 'gas-electricity-carbon' can be realized. After the bamboo is applied to power generation, the energy is fully utilized, the ash content of the generated bamboo charcoal is high, the fixed carbon is low, and meanwhile, the bamboo charcoal can not reach the fixed carbon and ash content required by qualified bamboo charcoal of national standard, so the price is low. Because the quality of bamboo charcoal is poor and the bamboo charcoal is difficult to be used as fuel or active carbon, how to utilize the bamboo charcoal is a great problem of biomass poly-generation.
In addition, many people are seriously disturbed by house noise in life, the environment of normal life is about 40-50 dB generally, the environment with outdoor noise is about 60-80 dB generally, but the environment with 30-40 dB is suitable when people sleep and rest, so the disturbance caused by the noise can be basically isolated when the sound insulation amount reaches about 30 dB; the sound insulation board can well isolate noise in home life, but research and development aiming at the sound insulation board are less, and the electromagnetic shielding effect of the existing sound insulation board is poor.
In addition, with the rapid development of electronic information and communication technology, electronic devices are widely used in life, and in recent years, problems of information leakage and electromagnetic interference are becoming more serious, so it is very important to take relevant measures to shield electromagnetic waves and protect information. The conductive composite board can well shield electromagnetic waves, but the carbon conductive materials such as graphene, carbon nanotubes and carbon fibers adopted at present are expensive and difficult to realize industrial production, and the sound insulation effect of the series of conductive materials is poor.
Therefore, in view of the above situation, there is a need to develop a low-cost sound insulation material with electromagnetic shielding function.
Disclosure of Invention
An object of an embodiment of the present invention is to provide a sound insulation material with an electromagnetic shielding function, which aims to solve the problems in the background art.
The embodiment of the invention is realized in such a way that the sound insulation material with the electromagnetic shielding function comprises the following components in percentage by mass: 35-65% of bamboo charcoal powder, 1-5% of foaming agent and 30-64% of thermoplastic resin, wherein the sum of the mass percentages of the components is 100%.
As a preferable scheme of the embodiment of the invention, the sound insulation material comprises the following components in percentage by mass: 40-60% of bamboo charcoal powder, 2-3% of foaming agent and 37-58% of thermoplastic resin, wherein the sum of the mass percentages of the components is 100%.
As another preferable scheme of the embodiment of the invention, the bamboo charcoal powder is a residue of bamboo wood after multi-production, and the average particle size of the bamboo charcoal powder is 50-300 meshes.
As another preferable aspect of the embodiment of the present invention, the blowing agent is azodicarbonamide; the thermoplastic resin is at least one of polyethylene, polypropylene, polylactic acid, acrylonitrile-butadiene-styrene and polyvinyl chloride.
Another object of an embodiment of the present invention is to provide a method for preparing the sound insulation material, which includes the following steps:
pulverizing bamboo charcoal, soaking in water, taking out precipitate, and drying to obtain bamboo charcoal powder;
weighing bamboo charcoal powder, a foaming agent and thermoplastic resin according to the mass percentage of the components for later use;
pickling the bamboo charcoal powder, ultrasonically vibrating, filtering, and performing secondary carbonization to obtain secondarily carbonized bamboo charcoal powder;
mixing the secondarily carbonized bamboo charcoal powder with the thermoplastic resin, and then mixing at 170-190 ℃ to obtain a mixture A;
mixing the rest bamboo charcoal powder, the foaming agent and the rest thermoplastic resin, and then mixing at 170-190 ℃ to obtain a mixture B;
and co-extruding the mixture A and the mixture B to obtain the sound insulation material.
As another preferable scheme of the embodiment of the invention, in the mixture a, the mass ratio of the bamboo charcoal powder after the secondary carbonization is not less than 50%; in the mixture B, the quality of the bamboo charcoal powder is not higher than 40%.
As another preferable scheme of the embodiment of the invention, in the step, the acid adopted for acid washing is a nitric acid solution with the concentration of 1-3 mol/L; the temperature of secondary carbonization is 900-1300 ℃; the temperature of the co-extrusion treatment is 180-200 ℃.
Another object of an embodiment of the present invention is to provide a sound insulation material prepared by the above preparation method.
In another preferable embodiment of the present invention, the density of the sound-insulating material is 0.55 to 0.62g/cm3The sound insulation amount is 28-31 dB, the surface conductivity is 72-101S/m, and the bending strength is 17-22 MPa.
Another object of an embodiment of the present invention is to provide an electronic device, including a device main body and a housing, the housing partially or entirely containing the sound insulating material.
The sound insulation material with the electromagnetic shielding function provided by the embodiment of the invention has the advantages of low manufacturing cost, low density, better mechanical property, sound insulation effect and electromagnetic shielding effect. According to the embodiment of the invention, the bamboo charcoal powder obtained by biomass poly-generation is used as a raw material, the ash content of the bamboo charcoal powder is removed after the bamboo charcoal powder is subjected to water soaking and acidizing, and then the bamboo charcoal powder is subjected to secondary carbonization, so that the aperture of the bamboo charcoal can be enlarged and the bamboo charcoal has certain conductivity, wherein the macroporous structure of the bamboo charcoal is favorable for forming an interlocking structure with thermoplastic resin, and the mechanical property of the sound insulation material is enhanced.
In addition, in the preparation method of the sound insulation material provided by the embodiment of the invention, the mixture A does not contain a foaming agent, the mixture B contains a foaming agent, and the mixture A and the mixture B are co-extruded to prepare the integrated carbon plate with foamed middle and unfoamed surface, wherein the foaming structure of the carbon plate can greatly improve the sound insulation function and the mechanical property. In addition, the bamboo charcoal in the mixture A accounts for not less than the thermoplastic resin, so that the bamboo charcoal is in favor of being mutually overlapped to form a conductive network, and the electromagnetic shielding function is achieved; and the proportion of the bamboo charcoal in the mixture B is less than that of the thermoplastic resin, so that the strength of foaming cells is favorably improved.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The embodiment provides a sound insulation material with an electromagnetic shielding function, and the preparation method of the sound insulation material comprises the following steps:
s1, crushing the bamboo charcoal, soaking the bamboo charcoal in water for 6 hours, taking out the precipitate, and drying to obtain bamboo charcoal powder for later use; wherein, the bamboo charcoal is the residue of bamboo wood after multi-production; the average particle size of the bamboo charcoal powder is 200 meshes.
S2, weighing 4kg of the bamboo charcoal powder, 0.20kg of foaming agent and 5.8kg of thermoplastic resin for later use. Wherein the foaming agent is azodicarbonamide; the thermoplastic resin is commercially available polypropylene.
S3, placing the bamboo charcoal powder in 1mol/L nitric acid solution for acid washing, ultrasonically oscillating for 20min, and standing for 1 h; then, continuing to perform ultrasonic oscillation for 20min, and then performing filtration and washing; then, the bamboo charcoal powder is placed in a tube furnace at 1200 ℃ for secondary carbonization, and the bamboo charcoal powder after secondary carbonization is obtained.
S4, mechanically mixing the bamboo charcoal powder after the secondary carbonization with the thermoplastic resin for 6min, and then placing at 180 ℃ for mixing for 10min to obtain a mixture A. Wherein the mass percentage of the bamboo charcoal powder after the secondary carbonization in the mixture A is 50%.
S5, mechanically mixing the rest bamboo charcoal powder, the foaming agent and the rest thermoplastic resin for 6min, and then placing at 180 ℃ for mixing for 10min to obtain a mixture B. Wherein, the mass percentage of the bamboo charcoal powder in the mixture B is 37.5%.
S6, controlling the mass ratio of the mixture A to the mixture B to be 1:3, placing the mixture A in a main extruder, placing the mixture B in a co-extrusion extruder, setting the extrusion temperature to be 190 ℃, enabling the mixture A and the mixture B to form a carbon plate embryonic form after passing through a co-extrusion foaming machine head, and then cooling, sizing and cutting to form a plate-shaped structure to obtain the sound insulation material with the electromagnetic shielding function.
Example 2
The embodiment provides a sound insulation material with an electromagnetic shielding function, and the preparation method of the sound insulation material comprises the following steps:
s1, crushing the bamboo charcoal, soaking the bamboo charcoal in water for 8 hours, taking out the precipitate, and drying to obtain bamboo charcoal powder for later use; wherein, the bamboo charcoal is the residue of bamboo wood after multi-production; the average particle size of the bamboo charcoal powder is 80 meshes.
S2, weighing 6kg of the bamboo charcoal powder, 0.15kg of foaming agent and 3.7kg of thermoplastic resin for later use. Wherein the foaming agent is azodicarbonamide; the thermoplastic resin is a mixture of commercially available low-density polyethylene and ultrahigh molecular weight polyethylene mixed according to equal mass ratio.
S3, placing the bamboo charcoal powder in 3mol/L nitric acid solution for acid washing, ultrasonically oscillating for 15min, and standing for 3 h; then, continuing to perform ultrasonic oscillation for 20min, and then performing filtration and washing; then, placing the bamboo charcoal powder in a tube furnace at 1300 ℃ for secondary carbonization to obtain the bamboo charcoal powder after secondary carbonization.
S4, mechanically mixing the bamboo charcoal powder after the secondary carbonization with the thermoplastic resin for 8min, and then placing at 180 ℃ for mixing for 10min to obtain a mixture A. Wherein the mass percentage of the bamboo charcoal powder after the secondary carbonization in the mixture A is 60%.
S5, mechanically mixing the rest bamboo charcoal powder, the foaming agent and the rest thermoplastic resin for 8min, and then placing at 180 ℃ for mixing for 10min to obtain a mixture B. Wherein, in the mixture B, the mass percentage of the bamboo charcoal powder is 35%.
S6, controlling the mass ratio of the mixture A to the mixture B to be 1:3, placing the mixture A in a main extruder, placing the mixture B in a co-extrusion extruder, setting the extrusion temperature to be 180-.
Example 3
The embodiment provides a sound insulation material with an electromagnetic shielding function, and the preparation method of the sound insulation material comprises the following steps:
s1, crushing the bamboo charcoal, soaking the bamboo charcoal in water for 5 hours, taking out the precipitate, and drying to obtain bamboo charcoal powder for later use; wherein, the bamboo charcoal is the residue of bamboo wood after multi-production; the average particle size of the bamboo charcoal powder is 50 meshes.
S2, weighing 3.5kg of the bamboo charcoal powder, 0.1kg of foaming agent and 6.4kg of thermoplastic resin for later use. Wherein the foaming agent is azodicarbonamide; the thermoplastic resin is commercially available acrylonitrile-butadiene-styrene.
S3, placing the 2.5kg bamboo charcoal powder in 1mol/L nitric acid solution for acid washing, ultrasonically oscillating for 15min, and standing for 1 h; then, continuing to perform ultrasonic oscillation for 15min, and then performing filtration and washing; then placing the bamboo charcoal powder in a tube furnace at 900 ℃ for secondary carbonization to obtain the bamboo charcoal powder after secondary carbonization.
S4, mechanically mixing the bamboo charcoal powder after the secondary carbonization with the thermoplastic resin of 2kg for 5min, and then placing at 170 ℃ for mixing for 10min to obtain a mixture A.
S5, mechanically mixing the residual 1kg of bamboo charcoal powder, the foaming agent and the residual 4.4kg of thermoplastic resin for 5min, and then mixing at 170 ℃ for 10min to obtain a mixture B.
S6, placing the mixture A in a main extruder, placing the mixture B in a co-extrusion extruder, setting the extrusion temperature at 180 ℃, enabling the mixture A and the mixture B to form a carbon plate embryonic form after passing through a co-extrusion foaming machine head, and then cooling, sizing and cutting to form a plate-shaped structure, thus obtaining the sound insulation material with the electromagnetic shielding function.
Example 4
The embodiment provides a sound insulation material with an electromagnetic shielding function, and the preparation method of the sound insulation material comprises the following steps:
s1, crushing the bamboo charcoal, soaking the bamboo charcoal in water for 12 hours, taking out the precipitate, and drying to obtain bamboo charcoal powder for later use; wherein, the bamboo charcoal is the residue of bamboo wood after multi-production; the average particle size of the bamboo charcoal powder is 300 meshes.
S2, weighing 6.5kg of the bamboo charcoal powder, 0.5kg of foaming agent and 3kg of thermoplastic resin for later use. Wherein the foaming agent is azodicarbonamide; the thermoplastic resin is a mixture of commercially available common polylactic acid, acrylonitrile-butadiene-styrene and polyvinyl chloride according to equal mass ratio.
S3, placing the 5kg bamboo charcoal powder in 3mol/L nitric acid solution for acid washing, ultrasonically oscillating for 30min, and standing for 3 h; then, continuing to perform ultrasonic oscillation for 30min, and then performing filtration and washing; then, placing the bamboo charcoal powder in a tube furnace at 1300 ℃ for secondary carbonization to obtain the bamboo charcoal powder after secondary carbonization.
S4, mechanically mixing the bamboo charcoal powder after the secondary carbonization with the thermoplastic resin of 1.25kg for 10min, and then placing at 190 ℃ for mixing for 20min to obtain a mixture A.
S5, mechanically mixing the residual 1.5kg of bamboo charcoal powder, the foaming agent and the residual 1.75kg of thermoplastic resin for 10min, and then placing at 190 ℃ for mixing for 20min to obtain a mixture B.
S6, placing the mixture A in a main extruder, placing the mixture B in a co-extrusion extruder, setting the extrusion temperature at 200 ℃, enabling the mixture A and the mixture B to form a carbon plate embryonic form after passing through a co-extrusion foaming machine head, and then cooling, sizing and cutting to form a plate-shaped structure, thus obtaining the sound insulation material with the electromagnetic shielding function.
Example 5
The embodiment provides a sound insulation material with an electromagnetic shielding function, and the preparation method of the sound insulation material comprises the following steps:
s1, crushing the bamboo charcoal, soaking the bamboo charcoal in water for 8 hours, taking out the precipitate, and drying to obtain bamboo charcoal powder for later use; wherein, the bamboo charcoal is the residue of bamboo wood after multi-production; the average particle size of the bamboo charcoal powder is 200 meshes.
S2, weighing 4.2kg of the bamboo charcoal powder, 0.3kg of foaming agent and 5.5kg of thermoplastic resin for later use. Wherein the foaming agent is azodicarbonamide; the thermoplastic resin is a mixture of commercially available common polyethylene and polyvinyl chloride in equal mass ratio.
S3, placing the 1.4kg of bamboo charcoal powder in a 2mol/L nitric acid solution for acid washing, ultrasonically oscillating for 20min, and standing for 2 h; then, continuing to perform ultrasonic oscillation for 20min, and then performing filtration and washing; then placing the bamboo charcoal powder in a tube furnace at 1100 ℃ for secondary carbonization to obtain the bamboo charcoal powder after secondary carbonization.
S4, mechanically mixing the bamboo charcoal powder after the secondary carbonization with the thermoplastic resin of 0.6kg for 8min, and then placing at 180 ℃ for mixing for 15min to obtain a mixture A.
S5, mechanically mixing the residual 2.8kg of bamboo charcoal powder, the foaming agent and the residual 4.9kg of thermoplastic resin for 8min, and then placing at 180 ℃ for mixing for 15min to obtain a mixture B.
S6, placing the mixture A in a main extruder, placing the mixture B in a co-extrusion extruder, setting the extrusion temperature to 190 ℃, enabling the mixture A and the mixture B to form a carbon plate embryonic form after passing through a co-extrusion foaming machine head, and then cooling, sizing and cutting to form a plate-shaped structure, thus obtaining the sound insulation material with the electromagnetic shielding function.
Example 6
The embodiment provides a sound insulation material with an electromagnetic shielding function, and the preparation method of the sound insulation material comprises the following steps:
s1, crushing the bamboo charcoal, soaking the bamboo charcoal in water for 8 hours, taking out the precipitate, and drying to obtain bamboo charcoal powder for later use; wherein, the bamboo charcoal is the residue of bamboo wood after multi-production; the average particle size of the bamboo charcoal powder is 200 meshes.
S2, weighing 5.5kg of the bamboo charcoal powder, 0.2kg of foaming agent and 4.3kg of thermoplastic resin for later use. Wherein the foaming agent is azodicarbonamide; the thermoplastic resin is a mixture of commercially available common polypropylene and polylactic acid mixed according to equal mass ratio.
S3, placing the bamboo charcoal powder of 3kg in a nitric acid solution of 2mol/L for acid washing, ultrasonically oscillating for 20min, and standing for 2 h; then, continuing to perform ultrasonic oscillation for 20min, and then performing filtration and washing; then placing the bamboo charcoal powder in a tube furnace at 1100 ℃ for secondary carbonization to obtain the bamboo charcoal powder after secondary carbonization.
S4, mechanically mixing the bamboo charcoal powder after the secondary carbonization with the thermoplastic resin of 0.75kg for 8min, and then placing at 180 ℃ for mixing for 15min to obtain a mixture A.
S5, mechanically mixing the residual 2.5kg of bamboo charcoal powder, the foaming agent and the residual 3.55kg of thermoplastic resin for 8min, and then placing at 180 ℃ for mixing for 15min to obtain a mixture B.
S6, placing the mixture A in a main extruder, placing the mixture B in a co-extrusion extruder, setting the extrusion temperature to 190 ℃, enabling the mixture A and the mixture B to form a carbon plate embryonic form after passing through a co-extrusion foaming machine head, and then cooling, sizing and cutting to form a plate-shaped structure, thus obtaining the sound insulation material with the electromagnetic shielding function.
Example 7
The embodiment provides a sound insulation material with an electromagnetic shielding function, and the preparation method of the sound insulation material comprises the following steps:
s1, crushing the bamboo charcoal, soaking the bamboo charcoal in water for 8 hours, taking out the precipitate, and drying to obtain bamboo charcoal powder for later use; wherein, the bamboo charcoal is the residue of bamboo wood after multi-production; the average particle size of the bamboo charcoal powder is 200 meshes.
S2, weighing 5kg of the bamboo charcoal powder, 0.25kg of foaming agent and 4.75kg of thermoplastic resin for later use. Wherein the foaming agent is azodicarbonamide; the thermoplastic resin is a mixture of commercially available acrylonitrile-butadiene-styrene and polyvinyl chloride mixed according to equal mass ratio.
S3, placing the 1.8kg of bamboo charcoal powder in a 2mol/L nitric acid solution for acid washing, ultrasonically oscillating for 20min, and standing for 2 h; then, continuing to perform ultrasonic oscillation for 20min, and then performing filtration and washing; then placing the bamboo charcoal powder in a tube furnace at 1100 ℃ for secondary carbonization to obtain the bamboo charcoal powder after secondary carbonization.
S4, mechanically mixing the bamboo charcoal powder after the secondary carbonization with the thermoplastic resin of 0.2kg for 8min, and then placing at 180 ℃ for mixing for 15min to obtain a mixture A.
S5, mechanically mixing the residual bamboo charcoal powder of 3.2kg with the foaming agent and the residual thermoplastic resin of 4.55kg for 8min, and then placing at 180 ℃ for mixing for 15min to obtain a mixture B.
S6, placing the mixture A in a main extruder, placing the mixture B in a co-extrusion extruder, setting the extrusion temperature to 190 ℃, enabling the mixture A and the mixture B to form a carbon plate embryonic form after passing through a co-extrusion foaming machine head, and then cooling, sizing and cutting to form a plate-shaped structure, thus obtaining the sound insulation material with the electromagnetic shielding function.
The sound-insulating materials obtained in examples 1 and 2 and commercially available carbon plates were subjected to various performance tests in accordance with industry-related standards, and the test results are shown in table 1.
TABLE 1
| Performance of | Density (g/cm)3） | Sound insulation quantity (dB) | Surface resistivity（S/m） | Bending strength (Mpa) |
| Example 1 | 0.56 | 36 | 74 | 19 |
| Examples | 0.64 | 29 | 108 | 25 |
| Commercial carbon plate | 0.82 | 12 | 0.001 | 14 |
As can be seen from the above table, compared with a common carbon plate sold in the market, the sound insulation material prepared by the embodiment of the invention has the advantages of lower density, better sound insulation effect, better mechanical property and higher surface conductivity; the sound insulation material prepared by the embodiment of the invention has higher surface conductivity, so that the sound insulation material prepared by the embodiment of the invention has better antistatic and electromagnetic shielding effects.
In addition, in another embodiment of the present invention, there is also provided an electronic apparatus including an apparatus main body and a casing. The material of the shell can be injection molded by adopting the sound insulation material provided by the embodiment so as to improve the effects of sound insulation and electromagnetic shielding; it should be noted that the structure of the device main body is the same as that of the existing electronic device, which is not a point of improvement of the present invention, and therefore, the description thereof is omitted.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A sound insulation material with an electromagnetic shielding function comprises the following components in percentage by mass: 35-65% of bamboo charcoal powder, 1-5% of foaming agent and 30-64% of thermoplastic resin, wherein the sum of the mass percentages of the components is 100%.
2. The soundproof material with electromagnetic shielding function according to claim 1, wherein said soundproof material comprises the following components in mass percent: 40-60% of bamboo charcoal powder, 2-3% of foaming agent and 37-58% of thermoplastic resin, wherein the sum of the mass percentages of the components is 100%.
3. The sound insulation material with the electromagnetic shielding function as claimed in claim 1 or 2, wherein the bamboo charcoal powder is a residue of bamboo wood after multi-production, and the average particle size of the bamboo charcoal powder is 50-300 meshes.
4. The soundproof material having the electromagnetic shielding function according to claim 1 or 2, wherein the foaming agent is azodicarbonamide; the thermoplastic resin is at least one of polyethylene, polypropylene, polylactic acid, acrylonitrile-butadiene-styrene and polyvinyl chloride.
5. A method for producing the sound-insulating material according to any one of claims 1 to 4, comprising the steps of:
pulverizing bamboo charcoal, soaking in water, taking out precipitate, and drying to obtain bamboo charcoal powder;
weighing bamboo charcoal powder, a foaming agent and thermoplastic resin according to the mass percentage of the components for later use;
pickling the bamboo charcoal powder, ultrasonically vibrating, filtering, and performing secondary carbonization to obtain secondarily carbonized bamboo charcoal powder;
mixing the secondarily carbonized bamboo charcoal powder with the thermoplastic resin, and then mixing at 170-190 ℃ to obtain a mixture A;
mixing the rest bamboo charcoal powder, the foaming agent and the rest thermoplastic resin, and then mixing at 170-190 ℃ to obtain a mixture B;
and co-extruding the mixture A and the mixture B to obtain the sound insulation material.
6. The preparation method of the sound insulation material according to claim 5, wherein in the mixture A, the mass ratio of the bamboo charcoal powder after the secondary carbonization is not less than 50%; in the mixture B, the quality of the bamboo charcoal powder is not higher than 40%.
7. The method for preparing the sound insulation material according to claim 5, wherein in the step, the acid used for acid washing is a nitric acid solution of 1-3 mol/L; the temperature of secondary carbonization is 900-1300 ℃; the temperature of the co-extrusion treatment is 180-200 ℃.
8. A sound insulating material produced by the production method according to any one of claims 5 to 7.
9. The sound insulating material as claimed in claim 8, wherein the density of the sound insulating material is 0.55 to 0.62g/cm3The sound insulation amount is 28-31 dB, the surface conductivity is 72-101S/m, and the bending strength is 17-22 MPa.
10. An electronic device comprising a device main body and a casing, characterized in that the casing partially or entirely contains the sound-insulating material as claimed in any one of claims 1 to 4 and claims 8 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010599303.5A CN111662506B (en) | 2020-06-28 | 2020-06-28 | Sound insulation material with electromagnetic shielding function, preparation method and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010599303.5A CN111662506B (en) | 2020-06-28 | 2020-06-28 | Sound insulation material with electromagnetic shielding function, preparation method and electronic equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111662506A true CN111662506A (en) | 2020-09-15 |
| CN111662506B CN111662506B (en) | 2023-01-10 |
Family
ID=72390069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010599303.5A Active CN111662506B (en) | 2020-06-28 | 2020-06-28 | Sound insulation material with electromagnetic shielding function, preparation method and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111662506B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111909534A (en) * | 2020-08-12 | 2020-11-10 | 无锡啄木鸟环保建材有限公司 | Preparation method of sound-insulation noise-reduction light foaming type wood-plastic board |
| CN112210168A (en) * | 2020-10-22 | 2021-01-12 | 蚌埠学院 | Flexible composite sound absorption material, preparation method and application thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004224646A (en) * | 2003-01-23 | 2004-08-12 | Hinomaru Carbo Techno Co Ltd | Method of producing bamboo charcoal, bamboo charcoal, and bamboo charcoal-blended sheet |
-
2020
- 2020-06-28 CN CN202010599303.5A patent/CN111662506B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004224646A (en) * | 2003-01-23 | 2004-08-12 | Hinomaru Carbo Techno Co Ltd | Method of producing bamboo charcoal, bamboo charcoal, and bamboo charcoal-blended sheet |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111909534A (en) * | 2020-08-12 | 2020-11-10 | 无锡啄木鸟环保建材有限公司 | Preparation method of sound-insulation noise-reduction light foaming type wood-plastic board |
| CN111909534B (en) * | 2020-08-12 | 2022-02-25 | 无锡啄木鸟环保建材有限公司 | Preparation method of sound-insulation noise-reduction light foaming type wood-plastic board |
| CN112210168A (en) * | 2020-10-22 | 2021-01-12 | 蚌埠学院 | Flexible composite sound absorption material, preparation method and application thereof |
| CN112210168B (en) * | 2020-10-22 | 2022-09-30 | 蚌埠学院 | Flexible composite sound absorption material, preparation method and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111662506B (en) | 2023-01-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111662506B (en) | Sound insulation material with electromagnetic shielding function, preparation method and electronic equipment | |
| CN107082953A (en) | Inhale ripple, guided wave PP foam material and preparation method thereof | |
| CN110241613B (en) | Flexible ultrathin high-thermal-conductivity electromagnetic shielding film and preparation method thereof | |
| CN110564058B (en) | Green intumescent flame-retardant polypropylene and preparation method thereof | |
| CN102963096B (en) | Omni-directional metallic-coating polyolefin conductive foam and preparation method thereof | |
| Guo et al. | Biomass-based electromagnetic wave absorption materials with unique structures: a critical review | |
| CN103524143A (en) | Method for manufacturing foaming basalt thermal insulation material | |
| CN113480802A (en) | High-performance flame-retardant antistatic polypropylene | |
| CN111961305B (en) | Microcellular foamed HIPS electromagnetic shielding material and preparation method and application thereof | |
| CN106009517B (en) | A kind of epoxy resin/nickel-coated carbon fibers composite conducting foam and preparation method thereof | |
| CN109021461B (en) | Preparation method of environment-friendly interior wall decorative plate | |
| CN102205960B (en) | Method for preparing activated carbon electrode material for super capacitor | |
| CN103804776B (en) | A kind of aluminium-plastic-wood composite material and preparation method thereof | |
| CN107033393B (en) | A kind of preparation method of the fibrous material with low frequency absorption sound insulation function | |
| CN104264852A (en) | Compressible heat insulation sound absorption felt and preparing method of compressible heat insulation sound absorption felt | |
| CN212453422U (en) | Novel sound absorption decorative plate | |
| CN110328916B (en) | Preparation method of flame-retardant and electromagnetic shielding sandwich heat-insulating material | |
| CN110982196A (en) | Foam fireproof material suitable for charging station | |
| CN105294980A (en) | Straw foaming thermal-insulation material and preparation method thereof | |
| CN104974405A (en) | Dampproof silence pad and preparation process thereof | |
| CN115197570B (en) | Soft polyimide foam material with improved cell structure and preparation method thereof | |
| CN107501832A (en) | A kind of preparation method of sound-absorbing material | |
| CN111284100B (en) | High-strength light plastic cover plate material for cable trench and preparation method thereof | |
| CN115180889B (en) | Flame-retardant heat-insulating noise-reducing decorative plate and preparation method thereof | |
| CN113368817B (en) | Biomass charcoal-based light environment-friendly composite material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240603 Address after: No. 1 Huolonggang Avenue, Yucun Town, Jingde County, Xuancheng City, Anhui Province, 242000 Patentee after: Anhui Fanzhu New Energy Technology Co.,Ltd. Country or region after: China Address before: 311300 Wu Su street, Ling'an District, Hangzhou, Zhejiang Province, No. 666 Patentee before: ZHEJIANG A & F University Country or region before: China |
|
| TR01 | Transfer of patent right |