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Injection-moldable conductive heat-conduction modified fluoroplastic material and preparation method and application thereof

An electrical and thermal conductivity, injection molding technology, applied in the field of modified fluoroplastics, can solve the problems of poor electrical conductivity of fluoroplastics, unsatisfactory chemical resistance and weather resistance, and inferior wear resistance, chemical resistance and weather resistance to fluoroplastics, etc. To achieve the effect of good electrical and thermal conductivity, good physical and mechanical properties, and high production efficiency

Active Publication Date: 2015-09-23
青岛科凯达橡塑有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, some conductive plastics that can be processed by injection molding are usually mainly PA, PC, ABS and PET, which are far inferior to fluoroplastics in terms of wear resistance, chemical resistance and weather resistance.
However, due to poor electrical conductivity of fluoroplastics (volume resistivity of 10 17 left and right), usually only used for insulation products, and cannot satisfy some chemical and weather resistance fields that require electrical and thermal conduction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] 1. Dissolve 20.3g of nickel nitrate and 17.9g of magnesium nitrate in 100ml of absolute ethanol to prepare a mixed catalyst precursor solution, and prepare a 1:1 mixed solution of 0.7mol / L of nickel nitrate and magnesium nitrate. Apply the prepared precursor solution evenly on the copper substrate and let it dry naturally;

[0050]2. Put the tin wire under the substrate after being wound, and put it on the deposition table in the cavity of the DC plasma chemical vapor deposition equipment. Close the vacuum chamber and turn on the vacuum pump to evacuate. When the pump pressure is less than 0.1 Pa, argon and hydrogen are introduced into the vacuum chamber. The flows of argon and hydrogen are 4L / min and 10L / min respectively, start the DC arc, adjust the arc current to 120A, adjust the exhaust valve and the vacuum chamber regulating valve to stabilize the pressure in the vacuum chamber at 3000Pa, and react for 8min to obtain Ni / MgO catalyst;

[0051] 3. Under the condit...

Embodiment 2

[0065] 1. The preparation and surface treatment of modified carbon nanotubes, graphene and aluminum nitride are the same as steps 1 to 6 in Example 1.

[0066] 2. Add 15kg of deionized water, 3.75g of ammonium perfluorooctanoate, 75g of trifluorotrichloroethane, 5g of methanol, 3g of ammonium carbonate, and 1g of ammonia water into a 35L reaction kettle, and stir evenly. At the same time, add 650g of modified carbon nanotubes, 650g of modified Graphene, 575g modified aluminum nitride, stirring and sealing. Inject the inert gas argon to 2MPa, keep the pressure and observe for 30min without pressure drop, then evacuate to -0.08MPa.

[0067] 3. Slowly add 1.5kg of tetrafluoroethylene monomer and 45g of perfluoropropyl vinyl ether, stir and heat up to the reaction temperature of 65°C, the pressure of the reactor is 1.2MPa, add 1.5g of 10% ammonium persulfate solution and 2ml of 30% peroxide Cumyl neodecanoate solution, control the reaction temperature difference ±0.5°C for 1.5 ho...

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PUM

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Abstract

The invention relates to an injection-moldable conductive heat-conduction modified fluoroplastic material which is prepared from the following components in parts by weight: 50 to 100 parts of conductive heat-conduction modified basic fluoroplastic, 10 to 30 parts of an auxiliary material, 0 to 20 parts of a filling material and 5 to 30 parts of a processing auxiliary. The conductive heat conduction modified basic fluoroplastic is formed by performing in-situ polymerization on tetrafluoroethylene, perfluoro propyl vinyl ether, a conductive heat-conduction medium material and the auxiliary. The injection-moldable conductive heat-conduction modified fluoroplastic material has the beneficial effects that according to the prepared fluoroplastic, the conductive heat-conduction medium material is added in the polymerization process; by adoption of an in-situ polymerization technology, the volume resistivity (about 103 to 104) of the material is greatly reduced, and the heat conduction performance is improved (the heat conduction coefficient is greater than 3W / (m.K)), so that the injection-moldable conductive heat-conduction modified fluoroplastic material is higher in conductivity and heat conduction performance on the basis of chemical resistance and aging resistance. The technology is simple, the production efficiency is high, and no pollution waste is produced.

Description

technical field [0001] The invention relates to the field of modified fluoroplastics, in particular to a conductive and thermally conductive modified fluoroplastic material that can be produced and processed by an injection molding process, as well as its preparation method and application. Background technique [0002] Fluoroplastics are alkane polymers in which some or all of the hydrogen is replaced by fluorine. They include polytetrafluoroethylene (PTFE), perfluoro(ethylene propylene) (FEP) copolymer, polyperfluoroalkoxy (PFA) resin, poly Chlorotrifluoroethylene (PCTFF), ethylene-chlorotrifluoroethylene copolymer (ECTFE), ethylene-tetrafluoroethylene (ETFE) copolymer, polyvinylidene fluoride (PVDF) and polyvinyl fluoride (PVF). Fluoroplastics have high impact strength, good friction coefficient, good chemical resistance and flame retardancy, and are mainly used in many fields such as chemical industry, machinery, electrical appliances, construction, electronics, automobi...

Claims

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Application Information

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IPC IPC(8): C08L29/10C08K13/06C08K9/06C08K9/04C08K7/24C08K3/28C08K3/04C08K7/14C08K3/26C08F216/14C08F214/26C08F2/44C08L27/20C08L67/02C08L81/02B29C47/92B29C48/92
Inventor 张哲
Owner 青岛科凯达橡塑有限公司
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