CN116925471A - Heat insulation composite material and preparation method thereof - Google Patents
Heat insulation composite material and preparation method thereof Download PDFInfo
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- CN116925471A CN116925471A CN202310869859.5A CN202310869859A CN116925471A CN 116925471 A CN116925471 A CN 116925471A CN 202310869859 A CN202310869859 A CN 202310869859A CN 116925471 A CN116925471 A CN 116925471A
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- 239000002131 composite material Substances 0.000 title claims abstract description 60
- 238000009413 insulation Methods 0.000 title claims abstract description 48
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 229920001971 elastomer Polymers 0.000 claims abstract description 116
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 79
- 239000000945 filler Substances 0.000 claims abstract description 28
- 230000003712 anti-aging effect Effects 0.000 claims abstract description 26
- 239000004902 Softening Agent Substances 0.000 claims abstract description 22
- 230000003213 activating effect Effects 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims description 55
- 238000002156 mixing Methods 0.000 claims description 50
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 27
- 238000004513 sizing Methods 0.000 claims description 26
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 22
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 18
- 239000007864 aqueous solution Substances 0.000 claims description 18
- 239000006229 carbon black Substances 0.000 claims description 18
- 238000002791 soaking Methods 0.000 claims description 16
- 238000003723 Smelting Methods 0.000 claims description 12
- 238000007599 discharging Methods 0.000 claims description 12
- KOMNUTZXSVSERR-UHFFFAOYSA-N 1,3,5-tris(prop-2-enyl)-1,3,5-triazinane-2,4,6-trione Chemical compound C=CCN1C(=O)N(CC=C)C(=O)N(CC=C)C1=O KOMNUTZXSVSERR-UHFFFAOYSA-N 0.000 claims description 11
- 239000011787 zinc oxide Substances 0.000 claims description 11
- 229920002943 EPDM rubber Polymers 0.000 claims description 10
- 229920000459 Nitrile rubber Polymers 0.000 claims description 10
- 235000021355 Stearic acid Nutrition 0.000 claims description 10
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 10
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 10
- 239000008117 stearic acid Substances 0.000 claims description 10
- 239000005662 Paraffin oil Substances 0.000 claims description 9
- 239000012153 distilled water Substances 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 8
- 239000012802 nanoclay Substances 0.000 claims description 8
- 230000007935 neutral effect Effects 0.000 claims description 8
- 238000005406 washing Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 5
- IBOFPAYRQXRWIR-UHFFFAOYSA-N C(=S)=CNC Chemical compound C(=S)=CNC IBOFPAYRQXRWIR-UHFFFAOYSA-N 0.000 claims description 4
- BWGNESOTFCXPMA-UHFFFAOYSA-N Dihydrogen disulfide Chemical compound SS BWGNESOTFCXPMA-UHFFFAOYSA-N 0.000 claims description 4
- 239000012190 activator Substances 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 239000012763 reinforcing filler Substances 0.000 abstract description 3
- 238000004073 vulcanization Methods 0.000 description 11
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical group C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 description 7
- KUAZQDVKQLNFPE-UHFFFAOYSA-N thiram Chemical compound CN(C)C(=S)SSC(=S)N(C)C KUAZQDVKQLNFPE-UHFFFAOYSA-N 0.000 description 7
- 230000004913 activation Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000006185 dispersion Substances 0.000 description 4
- 230000032683 aging Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 230000001934 delay Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 230000003064 anti-oxidating effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
-
- 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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Processes Of Treating Macromolecular Substances (AREA)
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Abstract
The application discloses a heat-insulating composite material and a preparation method thereof, and relates to the technical field of rubber composite materials. The heat insulation composite material comprises the following components in parts by weight: 90-110 parts of raw rubber, 5-10 parts of activating agent, 1-3 parts of anti-aging agent, 60-150 parts of filler, 10-50 parts of softening agent, 20-60 parts of modified lignocellulose, 1-5 parts of accelerator and 2-6 parts of vulcanizing agent. The heat-insulating composite material disclosed by the application has the advantages that the modified lignocellulose is fully dispersed in the rubber, the heat-insulating performance of the rubber is improved, the filler can be better matched with the modified lignocellulose due to the larger specific surface area of the modified lignocellulose, and more reinforcing filler groups are contained in the modified lignocellulose, so that the mechanical performance of the heat-insulating composite material is improved, and the heat-insulating composite material has excellent heat-insulating performance and excellent mechanical performance.
Description
Technical Field
The application relates to the technical field of rubber composite materials, in particular to a heat-insulating composite material and a preparation method thereof.
Background
The rubber is a high-elasticity polymer material with reversible deformation, is elastic at room temperature, can generate larger deformation under the action of small external force, and can recover after the external force is removed. With the gradual development of the rubber industry, rubber is used in various aspects of life of people, and for the rubber material used in a high-temperature environment, higher requirements are put forward on the high-temperature resistance, the heat insulation performance and the mechanical performance of the rubber material, and the heat insulation composite material is provided for meeting the use requirements of the rubber material in the high-temperature environment.
Disclosure of Invention
The application mainly aims to provide a heat-insulating composite material and a preparation method thereof, and aims to solve the technical problem that the existing rubber material is poor in heat-insulating performance.
In order to achieve the aim, the application provides a heat-insulating composite material which comprises the following components in parts by weight: 90-110 parts of raw rubber, 5-10 parts of activating agent, 1-3 parts of anti-aging agent, 60-150 parts of filler, 10-50 parts of softening agent, 20-60 parts of modified lignocellulose, 1-5 parts of accelerator and 2-6 parts of vulcanizing agent.
Optionally, the raw rubber is one or two of ethylene propylene diene monomer rubber and nitrile rubber.
Optionally, the activator is one or two of zinc oxide and stearic acid.
Optionally, the filler is one or more of carbon black N220, carbon black N330 and nano-china clay.
Optionally, the softener is paraffin oil.
Alternatively, the accelerator is one or both of bis (thiocarbonyldimethylamine) disulfide and triallyl isocyanurate.
Optionally, the method for preparing the modified lignocellulose comprises the following steps:
soaking lignocellulose crushed into 90-110 meshes in 1.0-10 mol/L sodium hydroxide aqueous solution for 1-3 h, soaking in 1.0-10 mol/L ethanol aqueous solution for 1-3 h, taking out, washing with distilled water until the pH value is neutral, and drying at 90-110 ℃ for 5-7 h to obtain the modified lignocellulose.
The application also provides a preparation method of the heat-insulating composite material, which comprises the following steps:
banburying raw rubber, adding an activating agent and an anti-aging agent for mixing, adding a filler, a softening agent and modified lignocellulose for mixing, adding a vulcanizing agent and an accelerator for continuous mixing until rubber is discharged, and obtaining a rubber material;
and (3) carrying out thin-pass plasticating on the sizing material, simultaneously turning and smelting, and then placing the sizing material in a sheet for standing to obtain the finished heat-insulating composite material.
Optionally, banburying raw rubber, adding an activating agent and an anti-aging agent for mixing, adding a filler, a softening agent and modified lignocellulose for mixing, adding a vulcanizing agent and an accelerator for continuously mixing until rubber is discharged, and obtaining the rubber material, wherein the method comprises the following steps of:
banburying raw rubber for 1-4 min, adding an activating agent and an anti-aging agent, mixing for 0.5-2 min, adding a filler, a softening agent and modified lignocellulose, mixing for 1-4 min, adding a vulcanizing agent and an accelerating agent, continuously mixing to 120-140 ℃, and discharging rubber to obtain the rubber compound.
Optionally, the step of carrying out thin-pass plasticating on the sizing material, simultaneously carrying out turning and smelting, and then carrying out sheet discharging and standing to obtain the finished heat-insulating composite material comprises the following steps:
and (3) carrying out 2-time thin-pass plasticating on the sizing material, carrying out 3-time turning and smelting in a triangular bag forming manner, and then carrying out sheet discharging and standing for 11-13 h to obtain the finished heat-insulating composite material.
The heat insulation composite material takes raw rubber, an activating agent, an anti-aging agent, a filler, a softening agent, modified lignocellulose, an accelerator and a vulcanizing agent as raw materials, the modified lignocellulose has small specific gravity and large specific surface area, has excellent heat insulation, sound insulation and air permeability, has uniform thermal expansion, does not shell, does not crack, can greatly improve the heat insulation performance of rubber materials, can fully disperse the modified lignocellulose in rubber due to the excellent flexibility and dispersibility of the modified lignocellulose, can improve the heat insulation performance of the rubber, can better match the filler with the modified lignocellulose due to the large specific surface area, can contain more reinforcing filler groups in the modified lignocellulose, further improves the mechanical property of the heat insulation composite material, can promote the activation of the vulcanizing agent, accelerates the vulcanization reaction of the vulcanizing agent and the raw rubber, further shortens the vulcanization time, delays the aging of the rubber through the anti-aging agent, prolongs the service life of the rubber, improves the processability of the rubber due to the softening agent, assists in the improvement of the rubber and the mechanical strength of the rubber and the mechanical elongation of the composite material when the modified lignocellulose is mixed with the modified lignocellulose, and the mechanical strength of the modified lignocellulose is further improved. The heat-insulating composite material finally obtained by the application can insulate heat for several days when the working temperature reaches 150 ℃, can insulate heat for tens of hours when the temperature reaches 200 ℃, can insulate heat for several hours when the temperature exceeds 220 ℃, and has good heat-insulating property and excellent mechanical property.
The application firstly mixes the raw rubber to fully plasticize the raw rubber, then adds the activating agent and the anti-aging agent to mix, so as to improve the performance of the raw rubber, then adds the filler, the softening agent and the modified lignocellulose to mix, the softening agent improves the processability of the raw rubber and assists the dispersion and mixing of the raw rubber, the filler and the modified lignocellulose, the reinforcing group in the filler is contained in the modified lignocellulose, the heat insulation performance and the mechanical performance of the rubber material are improved, then the vulcanizing agent and the accelerating agent are added to mix until the rubber is discharged, the accelerating agent promotes the vulcanizing agent and the raw rubber to carry out vulcanization reaction, so as to obtain the rubber material with excellent heat insulation performance and mechanical performance, and then the rubber material is subjected to thin-pass plasticating, so that each component is dispersed uniformly, the quality of the rubber material is ensured, and meanwhile, the turning is performed so that the plasticity of the rubber material is more uniform, the preparation method is simple and feasible, and the finally prepared finished heat insulation composite material has good heat insulation performance and mechanical performance.
Detailed Description
The following description of the technical solutions in the embodiments of the present application will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Because the rubber material used in the high-temperature environment has higher requirements on the high-temperature resistance, the heat insulation performance and the mechanical performance of the rubber material, the heat insulation performance of the rubber material needs to be improved in order to meet the use requirements of the rubber material in the high-temperature environment.
Aiming at the technical problems of the prior rubber material, the embodiment of the application provides a heat insulation composite material, which comprises the following components in parts by weight: 90-110 parts of raw rubber, 5-10 parts of activating agent, 1-3 parts of anti-aging agent, 60-150 parts of filler, 10-50 parts of softening agent, 20-60 parts of modified lignocellulose, 1-5 parts of accelerator and 2-6 parts of vulcanizing agent.
The heat insulation composite material takes raw rubber, an activating agent, an anti-aging agent, a filler, a softening agent, modified lignocellulose, an accelerator and a vulcanizing agent as raw materials, the modified lignocellulose has small specific gravity and large specific surface area, has excellent heat insulation, sound insulation and air permeability, has uniform thermal expansion, does not shell, does not crack, can greatly improve the heat insulation performance of rubber materials, can fully disperse the modified lignocellulose in rubber due to the excellent flexibility and dispersibility of the modified lignocellulose, can improve the heat insulation performance of the rubber, can better match the filler with the modified lignocellulose due to the large specific surface area, can contain more reinforcing filler groups in the modified lignocellulose, further improves the mechanical property of the heat insulation composite material, can promote the activation of the vulcanizing agent, accelerates the vulcanization reaction of the vulcanizing agent and the raw rubber, further shortens the vulcanization time, delays the aging of the rubber through the anti-aging agent, prolongs the service life of the rubber, improves the processability of the rubber due to the softening agent, assists in the improvement of the rubber and the mechanical strength of the rubber and the mechanical elongation of the composite material when the modified lignocellulose is mixed with the modified lignocellulose, and the mechanical strength of the modified lignocellulose is further improved. The heat-insulating composite material finally obtained by the application can insulate heat for several days when the working temperature reaches 150 ℃, can insulate heat for tens of hours when the temperature reaches 200 ℃, can insulate heat for several hours when the temperature exceeds 220 ℃, and has good heat-insulating property and excellent mechanical property.
Preferably, the anti-aging agent is an anti-aging agent MB and the vulcanizing agent is dicumyl peroxide (DCP).
As an embodiment of the present application, the raw rubber is one or both of ethylene propylene diene monomer rubber and nitrile rubber. The ethylene propylene diene monomer rubber and the nitrile rubber contain more polar groups, and compared with natural rubber, the modified lignocellulose is easier to disperse in the ethylene propylene diene monomer rubber and the nitrile rubber and is more suitable for being used as a rubber matrix material.
As an embodiment of the present application, the activator is one or both of zinc oxide and stearic acid. The zinc oxide can activate the vulcanizing agent, the stearic acid also has an activation effect, and the zinc oxide can perform an acidic activation effect on rubber molecular double bonds, so that the generation of cross bonds is accelerated, the cross bond density of vulcanized rubber can be improved in certain vulcanization systems, the zinc oxide can perform a function of delaying sulfur points when being used together with an accelerator, and the stearic acid can also perform a function of improving filler dispersion effect.
As an embodiment of the present application, the filler is one or more of carbon black N220, carbon black N330, and nano-clay. The carbon black N220 and the carbon black N330 have reinforcing effect on rubber, and can increase the tensile resistance of the rubber material, while the nano clay can increase the dispersibility of the rubber, so that the prepared heat insulation composite material has excellent mechanical property.
As an embodiment of the present application, the softener is paraffin oil. The paraffin oil is used as the softener, so that the antioxidation degradation performance of the rubber can be improved, the dispersion and mixing of the rubber and the rest raw materials are assisted, the hardness of the rubber in the vulcanization reaction is reduced, and the aging shrinkage of the rubber is prevented.
As an embodiment of the present application, the accelerator is one or both of bis (thiocarbonyldimethylamine) disulfide and triallyl isocyanurate. Bis (thiocarbonyldimethylamine) disulfide, hereinafter abbreviated as TMTD, triallyl isocyanurate, and hereinafter abbreviated as TAIC, the TMTD and the TAIC can promote the activation of the vulcanizing agent, accelerate the vulcanization reaction speed of the vulcanizing agent and raw rubber, further shorten the vulcanization time and reduce the vulcanization temperature.
As an embodiment of the present application, the method for producing a modified lignocellulose comprises:
soaking lignocellulose crushed into 90-110 meshes in 1.0-10 mol/L sodium hydroxide aqueous solution for 1-3 h, soaking in 1.0-10 mol/L ethanol aqueous solution for 1-3 h, taking out, washing with distilled water until the pH value is neutral, and drying at 90-110 ℃ for 5-7 h to obtain the modified lignocellulose.
According to the application, the lignocellulose is soaked in the sodium hydroxide aqueous solution and the ethanol aqueous solution in sequence, so that the dispersibility and flexibility of the lignocellulose are improved, and compared with the lignocellulose, the modified lignocellulose has better dispersibility, so that the modified lignocellulose can be fully dispersed in rubber.
The embodiment of the application also provides a preparation method of the heat insulation composite material, which comprises the following steps:
banburying raw rubber, adding an activating agent and an anti-aging agent for mixing, adding a filler, a softening agent and modified lignocellulose for mixing, adding a vulcanizing agent and an accelerator for continuous mixing until rubber is discharged, and obtaining a rubber material;
and (3) carrying out thin-pass plasticating on the sizing material, simultaneously turning and smelting, and then placing the sizing material in a sheet for standing to obtain the finished heat-insulating composite material.
The application firstly mixes the raw rubber to fully plasticize the raw rubber, then adds the activating agent and the anti-aging agent to mix, so as to improve the performance of the raw rubber, then adds the filler, the softening agent and the modified lignocellulose to mix, the softening agent improves the processability of the raw rubber and assists the dispersion and mixing of the raw rubber, the filler and the modified lignocellulose, the reinforcing group in the filler is contained in the modified lignocellulose, the heat insulation performance and the mechanical performance of the rubber material are improved, then the vulcanizing agent and the accelerating agent are added to mix until the rubber is discharged, the accelerating agent promotes the vulcanizing agent and the raw rubber to carry out vulcanization reaction, so as to obtain the rubber material with excellent heat insulation performance and mechanical performance, and then the rubber material is subjected to thin-pass plasticating, so that each component is dispersed uniformly, the quality of the rubber material is ensured, and meanwhile, the turning is performed so that the plasticity of the rubber material is more uniform, the preparation method is simple and feasible, and the finally prepared finished heat insulation composite material has good heat insulation performance and mechanical performance.
As an implementation mode of the application, the steps of banburying raw rubber, adding an activating agent and an anti-aging agent for mixing, adding a filler, a softening agent and modified lignocellulose for mixing, adding a vulcanizing agent and an accelerating agent for continuously mixing until rubber is discharged, and obtaining rubber material comprise the following steps:
banburying raw rubber for 1-4 min, adding an activating agent and an anti-aging agent, mixing for 0.5-2 min, adding a filler, a softening agent and modified lignocellulose, mixing for 1-4 min, adding a vulcanizing agent and an accelerating agent, continuously mixing to 120-140 ℃, and discharging rubber to obtain the rubber compound.
As an implementation mode of the application, the steps of carrying out thin-pass plasticating on the sizing material, simultaneously turning the sizing material, and then standing the sizing material in a lower piece to obtain the finished heat-insulating composite material include:
and (3) carrying out 2-time thin-pass plasticating on the sizing material, carrying out 3-time turning and smelting in a triangular bag forming manner, and then carrying out sheet discharging and standing for 11-13 h to obtain the finished heat-insulating composite material.
Because the raw rubber has high viscosity, the raw rubber only flows circumferentially along the rotating direction of the roller of the open mill, but does not flow axially, and the raw rubber flowing circumferentially is laminar, so that the adhesive layer which is approximately 1/3 of the thickness of the rubber sheet and clings to the surface of the front roller cannot flow to become a dead layer or a dead layer, and the accumulated rubber at the upper part of the roller gap also forms a part of wedge-shaped backflow area, so that all components in the rubber material are unevenly dispersed. Therefore, the application firstly carries out plasticating for 2 times by thin-pass, and then carries out turning-over for 3 times by a triangular bag making mode so as to destroy a dead layer and a reflux zone and ensure that each component in the sizing material is uniformly mixed.
The above technical scheme of the present application will be described in detail with reference to specific embodiments.
Example 1
A heat insulation composite material is prepared by the following steps:
soaking lignocellulose crushed into 100 meshes in a sodium hydroxide aqueous solution with the concentration of 1.0mol/L for 2 hours, soaking in an ethanol aqueous solution with the concentration of 1.0mol/L for 2 hours, taking out, washing with distilled water until the pH value is neutral, and drying at 100 ℃ for 6 hours to obtain modified lignocellulose;
mixing 70kg of ethylene propylene diene monomer rubber and 30kg of nitrile rubber for 2min, adding 5kg of zinc oxide, 3kg of stearic acid and 2kg of an anti-aging agent MB for mixing for 1min, adding 220 kg of carbon black N, 330 kg of carbon black N, 30kg of nano-clay, 30kg of paraffin oil and 20kg of modified lignocellulose for mixing for 2min, adding 5kg of DCP, 0.5kg of TMTD and 2kg of TAIC, continuously mixing to 130 ℃, and discharging rubber to obtain a sizing material;
and (3) carrying out 2-time thin-pass plasticating on the sizing material, carrying out 3-time turning and smelting in a triangular bag forming manner, and then carrying out sheet feeding and standing for 12 hours to obtain the finished heat-insulating composite material.
Example 2
A heat insulation composite material is prepared by the following steps:
soaking lignocellulose crushed into 90 meshes in 10mol/L sodium hydroxide aqueous solution for 1h, soaking in 10mol/L ethanol aqueous solution for 1h, taking out, washing with distilled water until the pH value is neutral, and drying at 90 ℃ for 7h to obtain modified lignocellulose;
mixing 60kg of ethylene propylene diene monomer rubber and 40kg of nitrile rubber for 1min, adding 3kg of zinc oxide, 2kg of stearic acid and 1kg of an anti-aging agent MB, mixing for 0.5min, adding 220 kg of carbon black N, 330 kg of carbon black N, 20kg of nano-clay, 10kg of paraffin oil and 20kg of modified lignocellulose, mixing for 1min, adding 2kg of DCP, 1kg of TMTD and 1kg of TAIC, continuously mixing to 120 ℃, and discharging rubber to obtain a sizing material;
and (3) carrying out 2-time thin-pass plasticating on the sizing material, carrying out 3-time turning and smelting in a triangular bag forming manner, and then carrying out sheet feeding and standing for 11 hours to obtain the finished heat-insulating composite material.
Example 3
A heat insulation composite material is prepared by the following steps:
soaking lignocellulose crushed into 110 meshes in 5mol/L sodium hydroxide aqueous solution for 3 hours, soaking in 5mol/L ethanol aqueous solution for 3 hours, taking out, washing with distilled water until the pH value is neutral, and drying at 110 ℃ for 7 hours to obtain modified lignocellulose;
mixing 70kg of ethylene propylene diene monomer rubber and 40kg of nitrile rubber for 4min, adding 4kg of zinc oxide, 4kg of stearic acid and 3kg of an anti-aging agent MB for mixing for 2min, adding 220 kg of carbon black N, 330 kg of carbon black N, 40kg of nano-clay, 50kg of paraffin oil and 60kg of modified lignocellulose for mixing for 4min, adding 6kg of DCP, 2kg of TMTD and 3kg of TAIC, continuously mixing to 140 ℃, and discharging rubber to obtain a sizing material;
and (3) carrying out 2-time thin-pass plasticating on the sizing material, carrying out 3-time turning and smelting in a triangular bag forming manner, and then carrying out sheet feeding and standing for 13h to obtain the finished heat-insulating composite material.
Example 4
A heat insulation composite material is prepared by the following steps:
soaking lignocellulose crushed into 105 meshes in 2mol/L sodium hydroxide aqueous solution for 1.5 hours, soaking the lignocellulose into 2mol/L ethanol aqueous solution for 1.5 hours, taking out the lignocellulose, washing the lignocellulose with distilled water until the pH value is neutral, and drying the lignocellulose at 95 ℃ for 5.5 hours to obtain modified lignocellulose;
mixing 65kg of ethylene propylene diene monomer rubber and 35kg of nitrile rubber for 1.5min, adding 6kg of zinc oxide, 3kg of stearic acid and 1kg of an anti-aging agent MB for mixing for 0.5min, adding 220 kg of carbon black N, 330 kg of carbon black N, 30kg of nano clay, 35kg of paraffin oil and 50kg of modified lignocellulose for mixing for 1min, adding 4kg of DCP, 3kg of TMTD and 2kg of TAIC, continuously mixing to 120 ℃, and discharging rubber to obtain a sizing material;
and (3) carrying out 2-time thin-pass plasticating on the sizing material, carrying out 3-time turning and smelting in a triangular bag forming manner, and then carrying out sheet feeding and standing for 11 hours to obtain the finished heat-insulating composite material.
Comparative example 1
A heat insulation composite material is prepared by the following steps:
soaking lignocellulose crushed into 100 meshes in a sodium hydroxide aqueous solution with the concentration of 1.0mol/L for 2 hours, soaking in an ethanol aqueous solution with the concentration of 1.0mol/L for 2 hours, taking out, washing with distilled water until the pH value is neutral, and drying at 100 ℃ for 6 hours to obtain modified lignocellulose;
mixing 70kg of ethylene propylene diene monomer rubber and 30kg of nitrile rubber for 2min, adding 5kg of zinc oxide, 3kg of stearic acid and 2kg of an anti-aging agent MB for mixing for 1min, adding 220 kg of carbon black N, 330 kg of carbon black N, 30kg of nano-clay and 30kg of paraffin oil for mixing for 2min, adding 5kg of DCP, 0.5kg of TMTD and 2kg of TAIC, continuously mixing to 130 ℃, and discharging rubber to obtain a sizing material;
and (3) carrying out 2-time thin-pass plasticating on the sizing material, carrying out 3-time turning and smelting in a triangular bag forming manner, and then carrying out sheet feeding and standing for 12 hours to obtain the finished heat-insulating composite material.
Experimental example
The thermal insulation composites prepared in examples 1-4 and comparative example 1 were subjected to performance tests including hardness, tensile properties and thermal conductivity, wherein the hardness test was performed according to the GB/T531.1-2008 standard, the tensile properties test was performed according to the GB/T528-2009 standard, and the thermal conductivity test was performed according to the GB/T10297-2015 standard. The test results are shown in table 1 below.
TABLE 1
As can be seen from table 1, the thermal conductivity of the thermal insulation composite material prepared in comparative example 1 was higher than that of the thermal insulation composite material prepared in examples, and the thermal conductivity was better and worse as the thermal conductivity was larger, indicating that the addition of modified lignocellulose can make the thermal insulation composite material more excellent.
The foregoing description is only of alternative embodiments of the present application, and is not intended to limit the scope of the application, and all equivalent structural changes made by the content of the present application or direct/indirect application in other related technical fields are included in the scope of the present application.
Claims (10)
1. The heat insulation composite material is characterized by comprising the following components in parts by weight: 90-110 parts of raw rubber, 5-10 parts of activating agent, 1-3 parts of anti-aging agent, 60-150 parts of filler, 10-50 parts of softening agent, 20-60 parts of modified lignocellulose, 1-5 parts of accelerator and 2-6 parts of vulcanizing agent.
2. The insulation composite of claim 1, wherein the green rubber is one or both of ethylene propylene diene monomer rubber and nitrile rubber.
3. The insulation composite of claim 1, wherein the activator is one or both of zinc oxide and stearic acid.
4. The insulation composite of claim 1, wherein the filler is one or more of carbon black N220, carbon black N330, and nanoclay.
5. The insulation composite of claim 1, wherein the softening agent is paraffin oil.
6. The insulation composite of claim 1, wherein the accelerator is one or both of bis (thiocarbonyldimethylamine) disulfide and triallyl isocyanurate.
7. The insulation composite of claim 1, wherein the method of preparing the modified lignocellulose comprises:
soaking lignocellulose crushed into 90-110 meshes in 1.0-10 mol/L sodium hydroxide aqueous solution for 1-3 h, soaking in 1.0-10 mol/L ethanol aqueous solution for 1-3 h, taking out, washing with distilled water until the pH value is neutral, and drying at 90-110 ℃ for 5-7 h to obtain the modified lignocellulose.
8. The preparation method of the heat insulation composite material is characterized by comprising the following steps of:
banburying raw rubber, adding an activating agent and an anti-aging agent for mixing, adding a filler, a softening agent and modified lignocellulose for mixing, adding a vulcanizing agent and an accelerator for continuous mixing until rubber is discharged, and obtaining a rubber material;
and (3) carrying out thin-pass plasticating on the sizing material, simultaneously turning and smelting, and then placing the sizing material in a sheet for standing to obtain the finished heat-insulating composite material.
9. The method of preparing a heat insulation composite according to claim 8, wherein the steps of banburying raw rubber, adding an activating agent and an anti-aging agent for mixing, adding a filler, a softening agent and modified lignocellulose for mixing, adding a vulcanizing agent and an accelerating agent for continuously mixing until rubber is discharged, and obtaining rubber material comprise the steps of:
banburying raw rubber for 1-4 min, adding an activating agent and an anti-aging agent, mixing for 0.5-2 min, adding a filler, a softening agent and modified lignocellulose, mixing for 1-4 min, adding a vulcanizing agent and an accelerating agent, continuously mixing to 120-140 ℃, and discharging rubber to obtain the rubber compound.
10. The method for preparing the heat-insulating composite material according to claim 8, wherein the step of subjecting the sizing material to thin-pass plasticating while turning and then leaving the sizing material to stand to obtain the finished heat-insulating composite material comprises the steps of:
and (3) carrying out 2-time thin-pass plasticating on the sizing material, carrying out 3-time turning and smelting in a triangular bag forming manner, and then carrying out sheet discharging and standing for 11-13 h to obtain the finished heat-insulating composite material.
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