Search

CN-122013544-A - Graphene heating base cloth and preparation process thereof

CN122013544ACN 122013544 ACN122013544 ACN 122013544ACN-122013544-A

Abstract

The invention relates to the technical field of heating materials, in particular to a graphene heating base cloth and a preparation process thereof. The invention mixes dispersing agent, acrylic acid binder, modified carbon nano tube, aromatic microcapsule and solvent to obtain mixed solution. And mixing the graphene and the solvent, uniformly dispersing, and then adding the mixture into the mixed solution to obtain the graphene dispersion liquid. And coating the graphene dispersion liquid on the surface of the base cloth to obtain the graphene heating base cloth. The graphene heating base cloth prepared by the method has excellent thermal performance, flame retardant property and ageing resistance, so that the graphene heating base cloth has a wide application prospect in the technical field of heating materials.

Inventors

  • CUI MINGANG
  • HUANG MINGKUN
  • ZHU NINGYUAN
  • SHI YUHAO

Assignees

  • 江苏贝尔特福新材料股份有限公司

Dates

Publication Date
20260512
Application Date
20260312

Claims (10)

  1. 1. A preparation process of a graphene heating base fabric is characterized by comprising the following steps: Mixing a dispersing agent, an acrylic acid binder, a modified carbon nano tube, an aromatic microcapsule and a solvent, uniformly dispersing to obtain a mixed solution, mixing graphene and the solvent, uniformly dispersing by ultrasonic, and adding the mixed solution to obtain a graphene dispersion liquid; The modified carbon nano tube is obtained by grafting a hydroxyl flame retardant and an antioxidant material 2, 6-di-tert-butyl-4-hydroxymethyl phenol by isophorone diisocyanate, then further modifying the hydroxyl carbon nano tube, introducing an acrylic anti-aging agent into an acrylic monomer, and performing polymerization reaction under the action of an initiator to obtain the acrylic binder.
  2. 2. The preparation process of the graphene heating base cloth is characterized in that the solvent is N-methyl pyrrolidone, the dispersing agent is polyvinylpyrrolidone, and the content of each component in the graphene dispersion liquid is 1.5-3.0 parts of dispersing agent, 6-8 parts of acrylic acid binder, 3-5 parts of modified carbon nano tube, 0.8-1.0 part of aromatic microcapsule, 70-80 parts of solvent and 8-12 parts of graphene in parts by weight.
  3. 3. The preparation process of the graphene heating base cloth according to claim 2, wherein the preparation process of the modified carbon nano tube is as follows: Mixing anhydrous acetonitrile and m-phenylenediamine in nitrogen atmosphere, adding triethylamine, cooling to 0-2 ℃, dripping the reaction solution, continuously reacting for 2.5-3.0h after dripping, heating to 20-25 ℃ and continuously reacting for 10-15h, filtering, rotary steaming, precipitating, washing and drying after the reaction is finished to obtain the amination flame retardant; Step S2, mixing vanillin and absolute ethyl alcohol to obtain vanillin solution, mixing an amination flame retardant and absolute ethyl alcohol under the nitrogen atmosphere, dropwise adding the vanillin solution, heating to 50-55 ℃ after the dropwise adding is finished, reacting for 5.5-6.0h, and performing rotary evaporation after the reaction is finished to obtain a hydroxylation flame retardant; Step S3, mixing 2, 6-di-tert-butyl-4-hydroxymethyl phenol and N, N-dimethylformamide to obtain an antioxidation reaction liquid, mixing hydroxylated carbon nano tubes and N, N-dimethylformamide, performing ultrasonic dispersion to obtain a hydroxylated carbon nano tube dispersion liquid, mixing isophorone diisocyanate, dibutyltin dilaurate and N, N-dimethylformamide in a nitrogen atmosphere, sequentially dropwise adding the flame-retardant reaction liquid and the antioxidation reaction liquid at 27-30 ℃, continuously reacting for 7-9h after the dropwise addition, adding the hydroxylated carbon nano tube dispersion liquid, heating to 70-75 ℃ and continuously reacting for 8-10h, and centrifuging, washing and drying after the reaction is finished to obtain the modified carbon nano tube.
  4. 4. The preparation process of the graphene heating base cloth according to claim 3 is characterized in that in the step S1, the reaction molar ratio of phenylphosphonic dichloride to m-phenylenediamine is 1 (2.1-2.2).
  5. 5. The preparation process of the graphene heating base cloth according to claim 3, wherein in the step S2, the reaction molar ratio of the amino flame retardant to the vanillin is 1 (2.1-2.2).
  6. 6. The preparation process of the graphene heating base cloth according to claim 3, wherein in the step S3, the reaction mass ratio of isophorone diisocyanate, 2, 6-di-tert-butyl-4-hydroxymethyl phenol, a hydroxylation flame retardant and a hydroxylation carbon nano tube is (5-7): 1 (3.5-5.4): 0.8-1.0.
  7. 7. The preparation process of the graphene heating base cloth according to claim 2 is characterized in that the preparation process of the acrylic acid binder is as follows: Step 1, mixing glycidyl methacrylate, 2, 4-trimethyl-1, 2-dihydroquinoline and toluene solvent, continuously reacting for 5-6 hours at 90-100 ℃, intermittently adding polymerization inhibitor 4-methoxyphenol in the reaction process, and performing rotary evaporation, washing and drying after the reaction is finished to obtain an acrylic anti-aging agent; and 2, mixing the emulsifier alkylphenol ethoxylates, the emulsifier allyloxynonylphenol polyoxyethylene ether ammonium sulfate and deionized water, uniformly stirring at 85-90 ℃, adding an initiator, dropwise adding an aqueous solution, an oily solution and the initiator, preserving heat for 25-35min after the dropwise adding is finished, cooling to 25-30 ℃ and regulating the pH value of the solution to be neutral, thus obtaining the acrylic acid binder.
  8. 8. The preparation process of the graphene heating base cloth according to claim 7, wherein in the step 1, the reaction molar ratio of glycidyl methacrylate to 2, 4-trimethyl-1, 2-dihydroquinoline is (1.05-1.10): 1.
  9. 9. The preparation process of the graphene heating base cloth is characterized in that in the step 2, 20-25 parts of acrylamide, 3-5 parts of N, N-methylene bisacrylamide and 25-30 parts of deionized water are mixed to obtain an aqueous solution, 40-50 parts of butyl acrylate, 15-20 parts of methyl methacrylate, 8-12 parts of an acrylic anti-aging agent and 2-3 parts of acrylic acid are mixed to obtain an oily solution, 0.5-0.7 part of ammonium persulfate, 0.3-0.4 part of sodium bicarbonate and 2-3 parts of deionized water are mixed to obtain an initiator, and the content of each component of the acrylic binder is 2-3 parts of alkylphenol ethoxylate, 2-3 parts of allyloxynonylphenol polyoxyethylene ether ammonium sulfate, 20-25 parts of deionized water, 2.8-4.1 parts of an initiator, 48-60 parts of the aqueous solution and 65-85 parts of the oily solution.
  10. 10. A graphene heating substrate, characterized in that it is prepared by the preparation process according to any one of claims 1 to 9.

Description

Graphene heating base cloth and preparation process thereof Technical Field The invention relates to the technical field of heating materials, in particular to a graphene heating base cloth and a preparation process thereof. Background The graphene heating base cloth is an innovative application of a graphene material in the field of thermal management, and the core value of the graphene heating base cloth is derived from a unique two-dimensional honeycomb crystal structure of graphene, and the structure endows the graphene with excellent electric conductivity and heat conductivity. Compared with the traditional scheme relying on metal heating wires or carbon fibers, the graphene heating base cloth can realize rapid and uniform planar heating under low working voltage, has higher electric heat conversion efficiency and lower energy consumption, and therefore better meets urgent requirements of fields such as modern consumer electronics, medical physiotherapy, special clothing and the like on accurate, safe and comfortable heat sources. For the graphene heating base cloth, the heating performance is a direct functional embodiment of the product, and improving the electrothermal conversion efficiency means that lower energy consumption achieves the same temperature rise, so that the market competitiveness of the product is effectively improved. Therefore, the heating performance of the graphene heating base cloth is improved, and the graphene heating base cloth is a necessary requirement for large-scale and high-reliability commercial application from a laboratory concept. In addition, the graphene heating base cloth is used as a product which is often in contact with a human body, the flame retardant performance is the core of the safety of the graphene heating base cloth, and the heating body itself has the characteristics of flame retardance and even incombustibility so as to prevent or delay the generation and the spread of open fire and prevent catastrophic accidents. Furthermore, under long-term thermal cycle, environmental temperature and humidity changes, and mechanical stress (such as bending), the conductive heating network of the heating base cloth may be degraded due to oxidation of materials, structural fatigue, and interface delamination. Therefore, it is very necessary to improve the anti-aging performance thereof, and ensure that the resistance stability and the heating uniformity thereof are not significantly deteriorated in a longer period. In order to overcome the defects of the prior art, the invention provides a graphene heating base cloth and a preparation process thereof. Disclosure of Invention The invention aims to provide a graphene heating base cloth and a preparation process thereof, so as to solve the problems in the prior art. In order to achieve the above purpose, the present invention provides the following technical solutions: a preparation process of a graphene heating base fabric comprises the following steps: Mixing a dispersing agent, an acrylic acid binder, a modified carbon nano tube, an aromatic microcapsule and a solvent, uniformly dispersing to obtain a mixed solution, mixing graphene and the solvent, uniformly dispersing by ultrasonic, and adding the mixed solution to obtain a graphene dispersion liquid; The modified carbon nano tube is obtained by grafting a hydroxyl flame retardant and an antioxidant material 2, 6-di-tert-butyl-4-hydroxymethyl phenol by isophorone diisocyanate, then further modifying the hydroxyl carbon nano tube, introducing an acrylic anti-aging agent into an acrylic monomer, and performing polymerization reaction under the action of an initiator to obtain the acrylic binder. More optimally, the solvent is N-methyl pyrrolidone, the dispersing agent is polyvinylpyrrolidone, and the content of each component in the graphene dispersion liquid is 1.5-3.0 parts by weight of dispersing agent, 6-8 parts by weight of acrylic acid binder, 3-5 parts by weight of modified carbon nano tube, 0.8-1.0 parts by weight of aromatic microcapsule, 70-80 parts by weight of solvent and 8-12 parts by weight of graphene. More optimally, the preparation process of the modified carbon nano tube comprises the following steps: Mixing anhydrous acetonitrile and m-phenylenediamine in nitrogen atmosphere, adding triethylamine, cooling to 0-2 ℃, dripping the reaction solution, continuously reacting for 2.5-3.0h after dripping, heating to 20-25 ℃ and continuously reacting for 10-15h, filtering, rotary steaming, precipitating, washing and drying after the reaction is finished to obtain the amination flame retardant; Step S2, mixing vanillin and absolute ethyl alcohol to obtain vanillin solution, mixing an amination flame retardant and absolute ethyl alcohol under the nitrogen atmosphere, dropwise adding the vanillin solution, heating to 50-55 ℃ after the dropwise adding is finished, reacting for 5.5-6.0h, and performing rotary evaporation after the reaction is finished to obtain