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High-dielectricity three-phase polypropylene composite material, preparation method and application thereof

A composite material, polypropylene technology, applied in the field of polymers, can solve the problems such as the inability to effectively improve the compatibility of carbon nanotubes and polypropylene, and achieve the effect of improving the agglomeration problem, good strength and toughness, and good physical properties.

Active Publication Date: 2019-03-19
WANHUA CHEMICAL (NINGBO) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the non-polarity and low reactivity of polyolefin polymers, this method cannot effectively improve the compatibility of carbon nanotubes and polypropylene. Only by surface grafting polymers can the carbon nanotubes be fundamentally resolved. Tube Compatibility Issues with Polypropylene

Method used

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  • High-dielectricity three-phase polypropylene composite material, preparation method and application thereof

Examples

Experimental program
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Effect test

preparation example 1

[0045] 20 g of carbon nanotubes, 200 mL of concentrated sulfuric acid and 60 g of potassium permanganate were sequentially added to the reaction kettle, and after stirring at room temperature for 0.5 hours, the temperature was raised to 100° C. and stirred for 12 hours. After the reaction was completed, it was cooled to room temperature, an equal volume of deionized water was added to the reaction solution and suction filtration was carried out. After the filtered product was washed and filtered for three times, the filtered product was added to 200 ml of hydrazine hydrate and stirred for 1 hour, and the reaction solution was suction filtered. , washed three times and dried to obtain carbon oxide nanotubes. In the high-temperature reaction kettle, 10 g of carbon oxide nanotubes, 4-bromobutyryl chloride and 10 times the amount of 4-bromobutyryl chloride and 10 times the amount of carbon oxide nanotubes were added successively, and the reaction was carried out at 80 ° C for 12 A...

preparation example 2

[0047] The preparation method of the modified nano-ceramic: the surface of the copper-calcium titanate nano-ceramic particles is treated by atmospheric cold pressure plasma, the plasma gas is argon, the gas flow rate is 10L / min, the power is 600W, the treatment voltage is 4000V, and the treatment distance is 1cm. Processing time 5min. The treated nano-ceramic 500g was added to the reactor containing 600g of 1-dodecylsulfonyl chloride, 1000g of potassium carbonate, 2L of N,N-dimethylformamide, cooled to room temperature after 8 hours of reaction at 60°C and pumped. Filtering, washing the suction filtration product three times, suction filtration each three times, and drying to obtain the modified nano-ceramic.

preparation example 3

[0049] The preparation method of the modified nano-ceramic: the surface of the copper-calcium titanate nano-ceramic wire is treated by atmospheric cold pressure plasma. Processing time 5min. The treated nano-ceramic 500g was added to the reactor containing 600g of 1-dodecylsulfonyl chloride, 1000g of potassium carbonate, 2L of N,N-dimethylformamide, cooled to room temperature after 8 hours of reaction at 60°C and pumped. Filtering, washing the suction filtration product three times, suction filtration each three times, and drying to obtain the modified nano-ceramic.

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Abstract

The invention discloses a high-dielectricity three-phase polypropylene composite material, a preparation method and application thereof. The high-dielectricity three-phase polypropylene composite material comprises polypropylene, modified nano-ceramics, modified carbon nanotubes, a compatibilizer, an antioxidant, a lubricant, and other additives. The three-phase composite material is characterizedin that the nano-ceramics are uniformly distributed in a polypropylene matrix to provide excellent dielectric strength and dielectric constant for the material, by the aid of the carbon nanotubes serving as a third phase capable of forming a partial conductive three-dimensional network inside the material, dielectric loss of the material can be reduced, and due to the fact that the carbon nanotubes are microcosmically continuous and macrocosmically discontinuous in the polypropylene matrix, the dielectric strength and volume resistivity of the material cannot be influenced. The high-dielectricity three-phase polypropylene composite material is high in dielectric constant, low in dielectric loss, high in resistance to electric breakdown, excellent in mechanical performance, simple in the preparation method, suitable for industrial production and broad in application prospects in the fields of wireless charging, electronic parts and components, aerospace, new-energy vehicles, national defense and military industry and the like.

Description

technical field [0001] The invention relates to the technical field of polymers, in particular to a high-dielectric polypropylene three-phase composite material and a preparation method and application thereof. Background technique [0002] In recent years, with the rapid development of the field of electronic information and new energy vehicles, higher requirements have been placed on dielectric materials. Polymer dielectric materials with good dielectric properties, high mechanical properties and excellent processing properties have become the focus of research. As one of the five general-purpose plastics, polypropylene has excellent mechanical properties, acid and alkali resistance, good heat resistance, and good electrical insulation, and is widely used in automobiles, home appliances, packaging and other fields. However, the dielectric constant of conventional polypropylene is less than 3, which is a low dielectric constant material and cannot meet the requirements of ...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L51/06C08K13/06C08K9/02C08K9/04C08K9/00C08K3/04C08K3/24C08K5/098C08K5/20C08K7/08
CPCC08K2201/011C08L23/12C08L2203/20C08L51/06C08K13/06C08K9/08C08K9/02C08K9/04C08K9/00C08K3/041C08K3/24C08K5/098C08K5/20C08K7/08
Inventor 王子木霍江贝宋林颜晓捷王绍杰陈海波陈连清
Owner WANHUA CHEMICAL (NINGBO) CO LTD
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