CN115093621A - Silica aerogel rubber and preparation method and application thereof - Google Patents
Silica aerogel rubber and preparation method and application thereof Download PDFInfo
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- CN115093621A CN115093621A CN202210785957.6A CN202210785957A CN115093621A CN 115093621 A CN115093621 A CN 115093621A CN 202210785957 A CN202210785957 A CN 202210785957A CN 115093621 A CN115093621 A CN 115093621A
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- 229920001971 elastomer Polymers 0.000 title claims abstract description 92
- 239000005060 rubber Substances 0.000 title claims abstract description 92
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 82
- 239000004965 Silica aerogel Substances 0.000 title claims abstract description 46
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000004964 aerogel Substances 0.000 claims abstract description 40
- 239000006229 carbon black Substances 0.000 claims abstract description 17
- IANQTJSKSUMEQM-UHFFFAOYSA-N 1-benzofuran Chemical compound C1=CC=C2OC=CC2=C1 IANQTJSKSUMEQM-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000004088 foaming agent Substances 0.000 claims abstract description 15
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 14
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 14
- 238000004073 vulcanization Methods 0.000 claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 10
- 244000043261 Hevea brasiliensis Species 0.000 claims abstract description 9
- 239000002202 Polyethylene glycol Substances 0.000 claims abstract description 9
- 230000003712 anti-aging effect Effects 0.000 claims abstract description 9
- 239000002270 dispersing agent Substances 0.000 claims abstract description 9
- 229920003052 natural elastomer Polymers 0.000 claims abstract description 9
- 229920001194 natural rubber Polymers 0.000 claims abstract description 9
- 229920001223 polyethylene glycol Polymers 0.000 claims abstract description 9
- 239000004816 latex Substances 0.000 claims abstract description 7
- 229920000126 latex Polymers 0.000 claims abstract description 7
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000003921 oil Substances 0.000 claims abstract description 6
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 6
- 239000011593 sulfur Substances 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 23
- 229920001296 polysiloxane Polymers 0.000 claims description 15
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 10
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 239000002994 raw material Substances 0.000 claims description 6
- OUBMGJOQLXMSNT-UHFFFAOYSA-N N-isopropyl-N'-phenyl-p-phenylenediamine Chemical compound C1=CC(NC(C)C)=CC=C1NC1=CC=CC=C1 OUBMGJOQLXMSNT-UHFFFAOYSA-N 0.000 claims description 5
- 235000021355 Stearic acid Nutrition 0.000 claims description 5
- LELOWRISYMNNSU-UHFFFAOYSA-N hydrogen cyanide Chemical compound N#C LELOWRISYMNNSU-UHFFFAOYSA-N 0.000 claims description 5
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 5
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 5
- 239000008117 stearic acid Substances 0.000 claims description 5
- 239000011787 zinc oxide Substances 0.000 claims description 5
- 230000002209 hydrophobic effect Effects 0.000 claims description 4
- 229920001030 Polyethylene Glycol 4000 Polymers 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 239000004480 active ingredient Substances 0.000 claims description 2
- 238000001746 injection moulding Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- YXIWHUQXZSMYRE-UHFFFAOYSA-N 1,3-benzothiazole-2-thiol Chemical compound C1=CC=C2SC(S)=NC2=C1 YXIWHUQXZSMYRE-UHFFFAOYSA-N 0.000 claims 1
- YHMYGUUIMTVXNW-UHFFFAOYSA-N 1,3-dihydrobenzimidazole-2-thione Chemical compound C1=CC=C2NC(S)=NC2=C1 YHMYGUUIMTVXNW-UHFFFAOYSA-N 0.000 claims 1
- DEQZTKGFXNUBJL-UHFFFAOYSA-N n-(1,3-benzothiazol-2-ylsulfanyl)cyclohexanamine Chemical compound C1CCCCC1NSC1=NC2=CC=CC=C2S1 DEQZTKGFXNUBJL-UHFFFAOYSA-N 0.000 claims 1
- 239000002245 particle Substances 0.000 claims 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 11
- 229910052710 silicon Inorganic materials 0.000 abstract description 11
- 239000010703 silicon Substances 0.000 abstract description 11
- 238000009776 industrial production Methods 0.000 abstract description 3
- 238000005299 abrasion Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000002195 synergetic effect Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000012549 training Methods 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000011056 performance test Methods 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
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B13/00—Soles; Sole-and-heel integral units
- A43B13/02—Soles; Sole-and-heel integral units characterised by the material
- A43B13/04—Plastics, rubber or vulcanised fibre
-
- 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
-
- 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
- C08J9/009—Use of pretreated compounding ingredients
-
- 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
- C08J2307/00—Characterised by the use of natural rubber
-
- 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
- C08J2415/00—Characterised by the use of rubber derivatives
-
- 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
- C08J2445/00—Characterised by the use of homopolymers or copolymers of compounds having no unsaturated aliphatic radicals in side chain, and having one or more carbon-to-carbon double bonds in a carbocyclic or in a heterocyclic ring system; Derivatives of such polymers
- C08J2445/02—Characterised by the use of homopolymers or copolymers of compounds having no unsaturated aliphatic radicals in side chain, and having one or more carbon-to-carbon double bonds in a carbocyclic or in a heterocyclic ring system; Derivatives of such polymers of coumarone-indene polymers
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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
- C08J2471/00—Characterised by the use of polyethers obtained by reactions forming an ether link in the main chain; Derivatives of such polymers
- C08J2471/02—Polyalkylene oxides
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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
- C08J2491/00—Characterised by the use of oils, fats or waxes; Derivatives thereof
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- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a silicon aerogel rubber and a preparation method and application thereof, wherein silicon dioxide aerogel is taken, smashed and then uniformly mixed with epoxidized latex to obtain a pre-dispersing agent, and then the pre-dispersing agent is mixed with natural rubber, white carbon black, a foaming agent, coumarone, spindle oil, polyethylene glycol and the like, and after being mixed for multiple times, an anti-aging agent and an accelerating agent are added, sulfur is added, and then mixing and vulcanization are carried out to obtain the silicon aerogel rubber. The silica aerogel rubber has the advantages of comfort, wear resistance, light weight and good heat resistance. The invention is suitable for the industrial production of the silicon aerogel rubber and the silicon aerogel rubber soles.
Description
Technical Field
The invention belongs to the technical field of rubber materials, and relates to a silicon aerogel rubber, in particular to a silicon aerogel rubber and a preparation method and application thereof.
Background
The rubber is used as a commonly used sole material and is widely applied in the shoe making process. In the use process of the shoes and boots, the edges and the heel parts of the soles are easy to wear, and the wear resistance of the sole material becomes one of the factors for determining the service life of the shoes. With the change of the consumption concept, the abrasion degree of the sole is no longer the main reason for purchasing new shoes and boots, and consumers pay more attention to the comfort of the shoes and boots in order to reduce the burden of feet. Improving the overall lightness of the footwear by reducing the weight of the sole material is an important way to improve the comfort of the footwear.
Compared with common shoes and boots, shoes and boots for military use, fire fighting and other special purposes have higher requirements on sole materials, and besides basic wear resistance and comfort, the shoes and boots have higher requirements on the portability of the sole materials due to large physical power consumption of users in daily work. However, the existing sole material usually improves the wear resistance through a material with high density and heavy weight at the cost of losing the portability, so that the sole material with comfort, wear resistance and light weight is provided to become a key technical problem to be solved for the sole material innovation.
Disclosure of Invention
The invention aims to solve the technical problems and provides a silicon aerogel rubber and a preparation method thereof, wherein the aim of preparing a sole material with comfort, wear resistance, light weight and good heat resistance is fulfilled by operations of smashing silicon dioxide aerogel, pre-dispersing, premixing and the like;
the invention also aims to provide application of the silica aerogel rubber in preparing silica aerogel rubber soles.
In order to achieve the purpose, the invention adopts the technical scheme that:
the silica aerogel rubber comprises the following raw materials of active ingredients in parts by weight: 50-70 parts of natural rubber, 30-50 parts of epoxidized latex, 15-20 parts of white carbon black, 8-13 parts of carbon black, 5-15 parts of silica aerogel, 2-5 parts of foaming agent, 2-5 parts of coumarone, 2-6 parts of spindle oil, 3-4 parts of polyethylene glycol, 1-3 parts of silane coupling agent, 4-5 parts of zinc oxide, 1-3 parts of stearic acid and 2-5 parts of sulfur.
As a limitation of the present invention, the silica aerogel is a hydrophobic or hydrophilic silica aerogel;
the natural rubber is obtained after plastication treatment;
the foaming agent is foaming agent AC;
the silane coupling agent is a silane coupling agent SI-69.
As another limitation of the invention, the catalyst also comprises 1-5 parts by weight of promoter CZ, 1-2 parts by weight of promoter M, 1-3 parts by weight of anti-aging agent 4010NA and 0.5-2 parts by weight of anti-aging agent MB.
The invention also provides a preparation method of the silica aerogel rubber, which comprises the following steps in sequence:
s1: taking silicon dioxide aerogel, smashing the silicon dioxide aerogel until the length is 3-5mm, mixing the silicon dioxide aerogel with epoxidized latex uniformly, and drying to obtain a pre-dispersant;
s2: mixing a pre-dispersing agent, natural rubber, white carbon black, a foaming agent, coumarone, spindle oil, polyethylene glycol, a silane coupling agent, zinc oxide and stearic acid to obtain a pre-mixed rubber;
s3: taking the premixed rubber, mixing for the second time, adding the anti-aging agent 4010NA and the anti-aging agent MB, mixing for the third time, adding the promoter CZ and the promoter M, mixing for the fourth time, adding sulfur, mixing for the fifth time, and standing to obtain a rubber material;
s4: and (3) vulcanizing the rubber material to obtain the silica aerogel rubber. The invention also provides the silicon aerogel rubber, a preparation method and an application thereof, wherein the carbon black is carbon black N330;
the polyethylene glycol is PEG 4000;
the carbon black, the coumarone and the polyethylene glycol are powder.
The further limitation of the invention is that the mixing time is 4-10min, and the rubber discharge temperature is 75-85 ℃;
the time of the second mixing, the third mixing, the fourth mixing and the fifth mixing is 2-5 min.
As a further limitation of the invention, the vulcanization temperature of the vulcanization treatment is 140-160 ℃, the vulcanization time is 2-10min and the vulcanization pressure is 20-30 MPa.
The invention also provides an application of the silica aerogel rubber prepared by the preparation method, and the silica aerogel rubber is taken and subjected to injection molding to prepare the silica aerogel rubber sole.
The invention can also use the silica aerogel rubber prepared by the preparation method to prepare rubber products such as light heat-insulating rubber floors, gaskets and the like.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the technical progress that:
the silica aerogel is added into the raw materials for preparing the silica aerogel rubber, so that the density is lower compared with that of common rubber, the foaming effect, the number of air holes and the air hole structure are comprehensively improved through the synergistic effect of the silica aerogel and the foaming agent AC, the density of the rubber is further improved, the weight of the prepared rubber is reduced, and the sole is lighter; the weight of the military rubber sole is reduced, the comfort level is improved, the physical strength of soldiers is saved in the daily training and long-distance walking processes, and the fighting capacity is improved;
the silicon dioxide aerogel is smashed to be 3-5mm in length and then is uniformly mixed with the epoxidized latex to obtain the pre-dispersing agent, compared with the smashed silicon dioxide aerogel, the flying loss is less, the environment is more environment-friendly, meanwhile, the hardness of the silicon dioxide aerogel is reduced through pre-dispersion, and the wear-resisting effect is improved;
the components in the raw materials are matched with each other, so that the heat insulation performance of the silica aerogel rubber is comprehensively improved, the wearing comfort is improved, and the silica aerogel rubber is suitable for fire fighting training; the rubber sole shoes and boots made of the silica aerogel rubber can be used in desert environment, and can block heat conduction of high-temperature gravel to soles to a certain extent;
the invention is suitable for the industrial production of the silicon aerogel rubber and the silicon aerogel rubber soles.
Detailed Description
The present invention will be described in further detail with reference to the following examples. It should be understood that the described embodiments are only for illustrating the present invention and do not limit the present invention.
The materials, reagents and the like used in the examples of the present invention are commercially available unless otherwise specified. The experimental procedures, in which specific conditions are not indicated in the examples, are generally carried out under conventional conditions or conditions recommended by the manufacturer.
Example 1A Silicone aerogel rubber and method of making the same
The embodiment is a preparation method of a silicone aerogel rubber, which comprises the following steps in sequence:
s1, taking 5kg of hydrophobic silica aerogel, smashing the hydrophobic silica aerogel into blocks with the length of 3-5mm, mixing the blocks with 50kg of epoxidized latex uniformly, and drying to obtain a pre-dispersing agent;
s2, plastication treatment: plasticating natural rubber in a masticator for 5min for later use;
taking a pre-dispersant, 50kg of plasticated natural rubber, 20kg of white carbon black, 13kg of powdered carbon black N330, 2kg of foaming agent AC, 2kg of powdered coumarone, 6kg of spindle oil, 3kg of PEG4000, 3kg of silane coupling agent SI-69, 2kg of zinc oxide and 3kg of stearic acid, and mixing for 10min at the rubber discharge temperature of 85 ℃ to obtain pre-mixed rubber;
s3, putting the premixed rubber into an open mill, mixing for 4min for the second time, adding 1kg of an anti-aging agent 4010NA and 0.5kg of an anti-aging agent MB, mixing for 5min for the third time, adding 1kg of a promoter CZ and 2kg of a promoter M, mixing for 3min for the fourth time, adding 5kg of sulfur, mixing for 2min for the fifth time, and standing for 6h to obtain a rubber material;
s4, vulcanizing the rubber material under the conditions that the vulcanization temperature is 140 ℃, the vulcanization time is 8min and the vulcanization pressure is 20MPa to obtain the silica aerogel rubber, and marking as J1.
Examples 2-6 Silicone aerogel rubber and methods of making the same
Examples 2 to 6 are a silicone aerogel rubber and a method for preparing the same, and the specific method is substantially the same as that of example 1, except that the parameter settings are different, and the specific differences are shown in table 1:
table 1 table of parameters of examples 2 to 6
The contents of other portions of examples 2 to 6 are the same as those of example 1.
Example 7 detection of Silicone aerogel rubber Properties
Preparation of control group: a control rubber, designated as rubber DZ, was prepared as in example 1, with the same amount of silica aerogel replaced with equal amounts of white carbon black, and the other raw materials as in example 1.
This example tests the tensile strength at break, elongation at break, density, DIN abrasion and hardness of the silicone aerogel rubbers J1-J6 and rubber DZ obtained in examples 1-6. The results are shown in Table 2:
TABLE 2 Performance test results
The above results show that the embodiment with a large content of silica aerogel causes the prepared silica aerogel rubber to have a lower density, so that the density of the prepared rubber material is reduced by adding the silica aerogel into the raw materials for preparing the silica aerogel rubber, the foaming effect, the number of air holes and the air hole structure are comprehensively improved by the synergistic effect of the silica aerogel and the foaming agent AC, the density of the rubber is further improved, the weight of the prepared rubber is reduced, the sole is lighter, and the comfort level is improved.
According to the invention, through operations of smashing the silicon dioxide aerogel, pre-dispersing, pre-mixing and the like, the prepared silicon aerogel rubber has good comprehensive properties of tensile strength at break, elongation at break, density, DIN abrasion and hardness, is suitable for industrial production, and solves the problem that the density and the abrasion resistance of a rubber material are both difficult to complete.
Example 8 use of Silicone aerogel rubber for preparing Silicone aerogel rubber shoe soles
In this embodiment, the silicone aerogel rubber J1 obtained in example 1 is cut by a special cutter to form a rubber strip or a rubber sheet, and then vulcanized and molded by a dual-density continuous injection machine to obtain a silicone aerogel rubber sole.
Through detection, compared with a control group which replaces silica aerogel with equivalent white carbon black, the prepared silica aerogel rubber sole has lighter weight and better comprehensive performances such as tensile strength at break, elongation at break, density, DIN abrasion, hardness and the like.
Example 9 detection of Heat resistance of Silicone aerogel rubber
This example is to verify the effect of adding silica aerogel and a foaming agent simultaneously on improving the heat resistance of a rubber material.
Experimental groups: cutting the silica aerogel rubber J1 into films with the size of 15 multiplied by 1cm, and marking the films as films A;
comparison group: a comparative rubber was prepared in the same manner as in example 1 except that silica aerogel and a foaming agent were not added, and cut into sheets of 15X 1cm in size and labeled as sheet B;
and (3) heat resistance test: and (3) simultaneously placing the film A and the film B on a steel plate with the temperature of 140 ℃ to ensure that the environmental temperatures of the film A and the film B are consistent, respectively recording the surface temperatures of the two films 10min, 20min and 30min after the steel plate is placed by using a point temperature gun, repeating the heat resistance test for 5 times, and taking the average value of the results.
And (3) test results: the results show that film a has a maximum temperature difference of 10 ℃ from the average temperature of film B at each monitoring time point. Therefore, the silica aerogel and the foaming agent have synergistic effect, and the heat insulation effect of the rubber material is improved while the density of the material is reduced and the portability is improved.
Although the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (8)
1. The silica aerogel rubber is characterized in that raw materials for preparing active ingredients of the silica aerogel rubber comprise the following components in parts by weight:
50-70 parts of natural rubber, 30-50 parts of epoxidized latex, 15-20 parts of white carbon black, 8-13 parts of carbon black, 5-15 parts of silica aerogel, 2-5 parts of foaming agent, 2-5 parts of coumarone, 2-6 parts of spindle oil, 3-4 parts of polyethylene glycol, 1-3 parts of silane coupling agent, 4-5 parts of zinc oxide, 1-3 parts of stearic acid and 2-5 parts of sulfur.
2. The silicone aerogel rubber of claim 1,
the silicon dioxide aerogel is hydrophobic or hydrophilic silicon dioxide aerogel;
the natural rubber is obtained after plastication treatment;
the foaming agent is foaming agent AC;
the silane coupling agent is a silane coupling agent SI-69.
3. The silica aerogel rubber according to claim 2, further comprising 1-5 parts by weight of accelerator CZ, 1-2 parts by weight of accelerator M, 1-3 parts by weight of antioxidant 4010NA and 0.5-2 parts by weight of antioxidant MB.
4. A method of preparing the silicone aerogel rubber of claim 3, comprising the steps of, in order:
s1: taking silicon dioxide aerogel, smashing the silicon dioxide aerogel until the particle size is 3-5mm, mixing the silicon dioxide aerogel with epoxidized latex uniformly, and drying to obtain a pre-dispersing agent;
s2: mixing a pre-dispersing agent, natural rubber, white carbon black, a foaming agent, coumarone, spindle oil, polyethylene glycol, a silane coupling agent, zinc oxide and stearic acid to obtain a pre-mixed rubber;
s3: taking the premixed rubber, mixing for the second time, adding the anti-aging agent 4010NA and the anti-aging agent MB, mixing for the third time, adding the promoter CZ and the promoter M, mixing for the fourth time, adding sulfur, mixing for the fifth time, and standing to obtain a rubber material;
s4: and (3) vulcanizing the rubber material to obtain the silica aerogel rubber.
5. The method for producing a silicone aerogel rubber according to claim 4,
the carbon black is carbon black N330;
the polyethylene glycol is PEG 4000;
the carbon black, the coumarone and the polyethylene glycol are powder.
6. The method of producing a silicone aerogel rubber according to claim 5,
the mixing time is 4-10min, and the rubber discharge temperature is 75-85 ℃;
the time of the second mixing, the third mixing, the fourth mixing and the fifth mixing is 2-5 min.
7. The method for preparing the silica aerogel rubber according to claim 6, wherein the vulcanization temperature of the vulcanization treatment is 140-160 ℃, the vulcanization time is 2-10min, and the vulcanization pressure is 20-30 MPa.
8. The application of the silica aerogel rubber is characterized in that the silica aerogel rubber prepared by the preparation method of the silica aerogel rubber of any one of claims 4 to 7 is used for preparing the silica aerogel rubber sole by injection molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210785957.6A CN115093621A (en) | 2022-07-04 | 2022-07-04 | Silica aerogel rubber and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210785957.6A CN115093621A (en) | 2022-07-04 | 2022-07-04 | Silica aerogel rubber and preparation method and application thereof |
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