CN117820022A - Composite material pot handle and preparation method thereof - Google Patents
Composite material pot handle and preparation method thereof Download PDFInfo
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- CN117820022A CN117820022A CN202311123651.5A CN202311123651A CN117820022A CN 117820022 A CN117820022 A CN 117820022A CN 202311123651 A CN202311123651 A CN 202311123651A CN 117820022 A CN117820022 A CN 117820022A
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- 239000002131 composite material Substances 0.000 title claims abstract description 49
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 34
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 28
- JGDITNMASUZKPW-UHFFFAOYSA-K aluminium trichloride hexahydrate Chemical compound O.O.O.O.O.O.Cl[Al](Cl)Cl JGDITNMASUZKPW-UHFFFAOYSA-K 0.000 claims abstract description 25
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229940009861 aluminum chloride hexahydrate Drugs 0.000 claims abstract description 18
- 239000000919 ceramic Substances 0.000 claims abstract description 18
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 6
- 238000009777 vacuum freeze-drying Methods 0.000 claims abstract description 6
- 239000002245 particle Substances 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims description 27
- 239000000463 material Substances 0.000 claims description 10
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- 238000007710 freezing Methods 0.000 claims description 9
- 230000008014 freezing Effects 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000008367 deionised water Substances 0.000 claims description 8
- 229910021641 deionized water Inorganic materials 0.000 claims description 8
- -1 azo compound Chemical class 0.000 claims description 5
- 238000009413 insulation Methods 0.000 abstract description 14
- 230000007062 hydrolysis Effects 0.000 abstract description 5
- 238000006460 hydrolysis reaction Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 abstract description 2
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 abstract 1
- 239000004964 aerogel Substances 0.000 description 9
- DMLAVOWQYNRWNQ-UHFFFAOYSA-N azobenzene Chemical compound C1=CC=CC=C1N=NC1=CC=CC=C1 DMLAVOWQYNRWNQ-UHFFFAOYSA-N 0.000 description 6
- 229910010293 ceramic material Inorganic materials 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000009472 formulation Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000006068 polycondensation reaction Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- GWBHOAAEVUXTGA-UHFFFAOYSA-N [4-[[4-(hydroxymethyl)phenyl]diazenyl]phenyl]methanol Chemical compound C1=CC(CO)=CC=C1N=NC1=CC=C(CO)C=C1 GWBHOAAEVUXTGA-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000004108 freeze drying Methods 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 150000003254 radicals Chemical class 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 159000000013 aluminium salts Chemical class 0.000 description 1
- 229910000329 aluminium sulfate Inorganic materials 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000002516 radical scavenger Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000007142 ring opening reaction Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/85—Coating or impregnation with inorganic materials
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J45/00—Devices for fastening or gripping kitchen utensils or crockery
- A47J45/06—Handles for hollow-ware articles
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5025—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with ceramic materials
- C04B41/5031—Alumina
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Food Science & Technology (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention relates to the technical field of pot handle production, in particular to a composite material pot handle and a preparation method thereof. The aluminum chloride hexahydrate comprises the following components in percentage by mass of 20-34 percent; 4-26% of 1, 2-epoxypropane; 20-28% of graphene; 20-36% of ceramic; 4-12% of sodium hydroxide. Aluminum chloride hexahydrate and 1, 2-epoxypropane react to generate alumina gel, graphene is uniformly dispersed in the gel, then the gel is uniformly coated on the surface of ceramic, and moisture is removed by a vacuum freeze drying method, so that the composite material with high temperature resistance and heat insulation is obtained. Wherein, the inorganic aluminum salt hydrolysis can not obtain gel, and the sol particles are promoted to be hydrolyzed and polycondensed by means of 1, 2-epoxypropane to obtain the aluminum oxide gel in sequence.
Description
Technical Field
The invention relates to the technical field of pot handle production, in particular to a composite material pot handle and a preparation method thereof.
Background
In the process of designing and manufacturing the composite material pot handle, different fibers and resins with reinforcing capability can be added, so that different functions and characteristics can be realized, and the composite material pot handle can meet different use requirements, such as strength increase, weight reduction and the like. In addition, composite material cookware handles are often aesthetically pleasing, and can provide a variety of color and style choices, meeting the aesthetic needs of consumers. However, the composite material pot handle has some disadvantages that compared with the traditional metal pot handle, the composite material pot handle has poor heat resistance, and the resin and the fiber in the composite material are easy to deform or damage at high temperature, so that the composite material pot handle is not suitable for being used in a high-temperature environment for a long time; secondly, the high temperature resistance of the composite material pot handle is poor, and at high temperature, the resin in the composite material can undergo chemical reaction, so that the material performance is reduced or damaged. Thus, composite pot handles are not suitable for use in high temperature cooking or baking situations. In view of this, the invention provides a composite material pot handle and a preparation method.
Disclosure of Invention
The invention aims to provide a composite material pot handle and a preparation method thereof, which are used for solving the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the composite material pot handle comprises the following components in percentage by mass:
preferably, the ratio of the aluminum chloride hexahydrate to the 1, 2-epoxypropane is 1:0.2-0.3.
Preferably, the ratio of the aluminum chloride hexahydrate to the graphene is 1:0.8-1. When the graphene content is too low or too high, the formed gel is too thin or thick, and is not easy to adhere to the ceramic surface, so that the follow-up process is not facilitated.
Preferably, the ratio of the aluminum chloride hexahydrate to the ceramic is 1:1-1.2.
Preferably, the particle size of the graphene is 80-100nm.
Preferably, the concentration of the sodium hydroxide is 2.5-2.7mol/L.
Preferably, the preparation method of the composite material pot handle comprises the following steps:
s1, dissolving aluminum chloride hexahydrate in deionized water, and stirring;
s2, adding 1, 2-epoxypropane into the hexahydrate aluminum chloride solution, and uniformly stirring;
s3, adding graphene into the solution in the step S2, uniformly stirring, adjusting the pH value by using sodium hydroxide, and standing for a period of time to obtain alumina/graphene gel;
s4, mixing the gel with the azo compound, uniformly mixing, uniformly coating the gel on the surface of the ceramic, and then placing the ceramic in a refrigerator for freezing;
and S5, placing the frozen material into a vacuum freeze dryer, and obtaining the composite material pot handle after vacuum freeze drying.
Wherein, the inorganic metal salt aluminum source has low price, simple and convenient use, easy control of preparation process conditions and easy realization of large-scale production, and the aluminum chloride hexahydrate is dissolved in deionized water, and the solution is filled with water and Al 3+ Al (OH) obtained by hydrolysis 3 And (3) colloid particles. Inorganic aluminium salt hydrolysis does not obtain gel, and the hydrolysis and polycondensation reaction of sol particles are promoted by means of a coagulant. 1, 2-propylene oxide is a good proton scavenger. In the presence of Al 3+ In the solution of (2), the 1, 2-epoxypropane can be subjected to ring opening to form free radical C 3 H 7 O - The free radical is a reactive group with very high reactivity and is easy to react with Al 3+ Bonding to promote hydration of Al 3+ To form hydroxyl groups required for polycondensation, and after the hydroxyl groups are formed, the polycondensation and the hydrolysis are simultaneously carried out to form the required Al (OH) 3 And (5) gel. The specific reaction equation is shown below:
Al(C 3 H 7 O) 3 +H 2 O→Al(C 3 H 7 O) 2 (OH)+C 3 H 7 OH；
Al(C 3 H 7 O) 2 (OH)+Al(C 3 H 7 O) 2 (OH)→(C 3 H 7 O) 2 -Al-O-Al-(C 3 H 7 O) 2 +H 2 O；
Al(C 3 H 7 O) 3 +Al(C 3 H 7 O) 2 (OH)→(C 3 H 7 O) 2 -Al-O-Al-(C 3 H 7 O) 2 +H 2 O。
with Al (OH) 3 The aerogel formed by the skeleton alone can cause deformation and structural collapse in the freeze drying process, and the graphene material with heat resistance and high temperature resistance can be added to avoid the occurrence of the phenomenon, so that the mechanical property of the aerogel material is enhanced and the heat resistance and high temperature resistance are improved at the same time. Al (OH) 3 The base gel is uniformly coated on the surface of a ceramic material, and a layer of aerogel structure is formed on the surface of the ceramic material after vacuum freeze drying, so that the aerogel has the characteristics of light weight, low density, heat insulation and the like, and the prepared composite material has the characteristics of heat resistance, high temperature resistance, heat insulation, light weight and the like.
Further, the azo compound contains two nitrogen atoms and is formed by connecting double bonds, pi-pi stacking acting force is generated on the group containing pi electron system, and interaction between the aerogel structure and the ceramic is enhanced through the pi-pi stacking acting force, so that the adhesion capability is enhanced, and the compound is not easy to fall off and deform at high temperature.
Preferably, the stirring time in the step S1 is 10-20min; the stirring time in the step S2 is 30-60min; the stirring time in the step S3 is 1-2h, the pH range is 6-8, and the standing time is 8-12h.
Preferably, the coating thickness in the S4 is 1-3mm, and the freezing time in the refrigerator is 20-24h.
Preferably, the vacuum freeze drying time in the step S5 is 36-48h.
Compared with the prior art, the invention has the beneficial effects that:
aluminum chloride hexahydrate and 1, 2-epoxypropane are used for preparing aluminum oxide gel, graphene with heat resistance and high temperature resistance is dispersed in the gel and coated in a ceramic material, and a composite material formed after freeze drying has heat resistance, high temperature resistance and heat insulation performance.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described in the following in conjunction with the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. In the present invention, all the equipment and raw materials are commercially available or commonly used in the industry, and the methods in the following examples are conventional in the art unless otherwise specified.
The following examples of the invention were used:
aluminum chloride hexahydrate was purchased from Yongtai chemical Co., ltd;
1, 2-epoxypropane purchasing is from the Jinan century to chemical industry Co., ltd, CAS number 75-56-9;
graphene procurement was from first-come nanotechnology limited;
ceramics were purchased from Guangdong five-member precision ceramics Co., ltd;
sodium hydroxide was purchased from Cangzhou Xinjia chemical products Co., ltd., CAS number 1310-73-2.
The azo compound is 4,4' -dimethylol azobenzene, and is purchased from Henan Wei Bosch chemical industry Co., ltd., CAS number 37797-30-1.
Example 1
In the embodiment, the composite material pot handle comprises the following components in percentage by mass:
the preparation method of the composite material pot handle comprises the following steps:
dissolving aluminum chloride hexahydrate in deionized water, and stirring for 20min; adding 1, 2-epoxypropane into the hexahydrate aluminum chloride solution, and stirring for 45min; adding 90nm graphene into the solution, stirring for 2 hours, adjusting the pH=7.2 by using 2.5mol/L sodium hydroxide, and standing for 12 hours to obtain alumina/graphene gel; mixing the gel with 4,4' -dihydroxymethyl azobenzene, uniformly coating on the surface of ceramic with the thickness of 2mm, and then freezing in a refrigerator for 24 hours; the frozen material was placed in a vacuum freeze dryer and vacuum freeze dried for 48 hours to obtain test sample 1.
Example 2
In the embodiment, the composite material pot handle comprises the following components in percentage by mass:
the preparation method of the composite material pot handle comprises the following steps:
dissolving aluminum chloride hexahydrate in deionized water, and stirring for 20min; adding 1, 2-epoxypropane into the hexahydrate aluminum chloride solution, and stirring for 45min; adding 90nm graphene into the solution, stirring for 2 hours, adjusting the pH=7.2 by using 2.5mol/L sodium hydroxide, and standing for 12 hours to obtain alumina/graphene gel; mixing the gel with 4,4' -dihydroxymethyl azobenzene, uniformly coating on the surface of ceramic with the thickness of 2mm, and then freezing in a refrigerator for 24 hours; the frozen material was placed in a vacuum freeze dryer and vacuum freeze dried for 48 hours to obtain test sample 2.
Example 3
In the embodiment, the composite material pot handle comprises the following components in percentage by mass:
the preparation method of the composite material pot handle comprises the following steps:
dissolving aluminum chloride hexahydrate in deionized water, and stirring for 20min; adding 1, 2-epoxypropane into the hexahydrate aluminum chloride solution, and stirring for 45min; adding 90nm graphene into the solution, stirring for 2 hours, adjusting the pH=7.2 by using 2.5mol/L sodium hydroxide, and standing for 12 hours to obtain alumina/graphene gel; mixing the gel with 4,4' -dihydroxymethyl azobenzene, uniformly coating on the surface of ceramic with the thickness of 2mm, and then freezing in a refrigerator for 24 hours; the frozen material was placed in a vacuum freeze dryer and vacuum freeze dried for 48 hours to obtain test sample 3.
Example 4
In the embodiment, the composite material pot handle comprises the following components in percentage by mass:
the preparation method of the composite material pot handle comprises the following steps:
dissolving aluminum chloride hexahydrate in deionized water, and stirring for 20min; adding 1, 2-epoxypropane into the hexahydrate aluminum chloride solution, and stirring for 45min; adding 90nm graphene into the solution, stirring for 2 hours, adjusting the pH=7.2 by using 2.5mol/L sodium hydroxide, and standing for 12 hours to obtain alumina/graphene gel; mixing the gel with 4,4' -dihydroxymethyl azobenzene, uniformly coating on the surface of ceramic with the thickness of 2mm, and then freezing in a refrigerator for 24 hours; the frozen material was placed in a vacuum freeze dryer and vacuum freeze dried for 48 hours to obtain test sample 4.
Example 5
In the embodiment, the composite material pot handle comprises the following components in percentage by mass:
the preparation method of the composite material pot handle comprises the following steps:
dissolving aluminum chloride hexahydrate in deionized water, and stirring for 20min; adding 1, 2-epoxypropane into the hexahydrate aluminum chloride solution, and stirring for 45min; adding 90nm graphene into the solution, stirring for 2 hours, adjusting the pH=7.2 by using 2.5mol/L sodium hydroxide, and standing for 12 hours to obtain alumina/graphene gel; mixing the gel with 4,4' -dihydroxymethyl azobenzene, uniformly coating on the surface of ceramic with the thickness of 2mm, and then freezing in a refrigerator for 24 hours; the frozen material was placed in a vacuum freeze dryer and vacuum freeze dried for 48 hours to obtain test sample 5.
Comparative example 1
The same formulation and preparation process as in example 1 was employed, except that no graphene was added, resulting in test sample 6.
Comparative example 2
The same formulation and preparation process as in example 1 were employed, except that 1, 2-propylene oxide was not added, to obtain test sample 7.
Comparative example 3
The same formulation and preparation process as in example 1 were employed, except that 4,4' -dihydroxymethylazobenzene was not added, to obtain test sample 8.
The obtained test samples 1 to 8 were subjected to high temperature resistance and heat insulation performance tests, and the test results are shown in the following table:
| deformation rate after high temperature (%) | Heat insulation rate (%) | |
| Test sample 1 | 3.3 | 97.2 |
| Test sample 2 | 4.1 | 95.4 |
| Test sample 3 | 4.3 | 94.9 |
| Test sample 4 | 5.5 | 89.1 |
| Test sample 5 | 5.9 | 87.3 |
| Test sample 6 | 10.8 | 77.1 |
| Test sample 7 | 13.3 | 69.6 |
| Test sample 8 | 8.1 | 85.1 |
As can be seen from the data in the table, the composite material formed by forming the aerogel structure outside the ceramic can effectively resist high temperature and insulate heat, and compared with the test samples 1-3, the high temperature resistance and the heat insulation performance of the composite material pot handle can be influenced when the content of alumina gel changes, the high temperature resistance and the heat insulation performance are increased along with the increase of the content of alumina gel, and the high temperature resistance and the heat insulation performance are reduced along with the increase of the content of alumina gel after the optimal effect is achieved; comparing the test samples 1, 4 and 5, it can be found that when the gel content of alumina or the graphene content exceeds a certain proportion, the high temperature resistance and the heat insulation performance of the composite material pot handle are reduced to a certain extent, because the formed aerogel structure influences the high temperature resistance and the heat insulation performance of the composite material; comparing test samples 1, 6 and 7, it can be found that when alumina gel and graphene are not present, the high temperature resistance and the heat insulation performance of the composite material pot handle are greatly reduced, because the formed aerogel structure is incomplete when alumina gel or graphene is absent, thereby affecting the overall structure of the composite material pot handle and further affecting the high temperature resistance and the heat insulation performance of the composite material pot handle. Comparing test samples 1, 8, it was found that when the product lacks the azo compound, there is no significant effect on the insulation properties, but the deformation rate after high temperature increases significantly due to the reduced adhesion between the aerogel structure and the ceramic.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present invention, and are not intended to limit the invention, and that various changes and modifications may be made therein without departing from the spirit and scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A composite material pan handle is characterized by comprising the following components in percentage by mass:
2. the composite pan handle according to claim 1, wherein the ratio of aluminum chloride hexahydrate to 1, 2-propylene oxide is 1:0.2-0.3.
3. The composite pan handle of claim 1, wherein the ratio of aluminum chloride hexahydrate to graphene is 1:0.8-1.
4. The composite pan handle according to claim 1, wherein the ratio of aluminum chloride hexahydrate to ceramic is 1:1-1.2.
5. The composite pan handle according to claim 1, wherein the particle size of the graphene is 80-100nm.
6. The composite pan handle according to claim 1, wherein the concentration of sodium hydroxide is 2.5-2.7mol/L.
7. A method for preparing a composite material pan handle according to any one of claims 1 to 6, characterized in that the preparation method of the composite material pan handle comprises the following steps:
s1, dissolving aluminum chloride hexahydrate in deionized water, and stirring;
s2, adding 1, 2-epoxypropane into the hexahydrate aluminum chloride solution, and uniformly stirring;
s3, adding graphene into the solution in the step S2, uniformly stirring, adjusting the pH value by using sodium hydroxide, and standing for a period of time to obtain alumina/graphene gel;
s4, mixing the gel with the azo compound, uniformly mixing, uniformly coating the gel on the surface of the ceramic, and then placing the ceramic in a refrigerator for freezing;
and S5, placing the frozen material into a vacuum freeze dryer, and obtaining the composite material pot handle after vacuum freeze drying.
8. The composite pan handle according to claim 5, wherein the stirring time in S1 is 10-20min; the stirring time in the step S2 is 30-60min; the stirring time in the step S3 is 1-2h, the pH range is 6-8, and the standing time is 8-12h.
9. The pan handle of claim 5, wherein the coating thickness in S4 is 1-3mm, and the freezing time in the refrigerator is 20-24h.
10. The pan handle of claim 5, wherein the vacuum freeze drying time in S5 is 36-48h.
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