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Hydrophobic porous polymer conductive material and preparation method and application thereof

A technology of porous polymers and hydrophobic polymers, applied in electrical components, magnetic field/electric field shielding, coatings, etc., can solve problems such as the decline of electromagnetic shielding effects

Active Publication Date: 2018-03-13
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problem that the electromagnetic shielding effect of the existing electromagnetic shielding material is reduced due to water pollution or acid rain corrosion, the invention provides a hydrophobic porous polymer conductive material, a preparation method and an application

Method used

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  • Hydrophobic porous polymer conductive material and preparation method and application thereof
  • Hydrophobic porous polymer conductive material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] First, flatten the loofah silk, cut it into 10cm×10cm×2cm blocks, put it on a graphite plate, put it in a furnace and charcoalize it to 500°C, and spread the porous carbon-based skeleton obtained after charcoalization on sandpaper; Then, 1 g of polyvinylidene fluoride was dissolved in 10 mL of N,N-dimethylformamide, and mechanically stirred at 80 ° C for 2 h until it was completely dissolved to obtain a uniform polymer solution; next, the polymer solution was coated on On the porous carbon-based framework, ensure that the porous carbon-based framework is close to the sandpaper and soaked by the polymer solution for 10 minutes, then place the porous carbon-based framework at room temperature for water vapor micro-phase separation, and finally put it in an oven at 80°C for drying 6h, a polymer conductive material with a thickness of 2 mm was obtained.

[0028] figure 1 Shown is the microscopic topography of the surface of the polymer conductive material prepared in this ...

Embodiment 2

[0031] The preparation method of this example is basically the same as that of Example 1, except that the loofah charcoal is burned to 1000°C.

[0032] After testing, the static water contact angle of the polymer conductive material prepared in this example close to the sandpaper surface is 148.2±2°, and the static water contact angle of the evaporation surface is 134.1±2°. The material exhibits excellent superhydrophobicity. The electromagnetic shielding effect of the polymer conductive material on the U-band ranges from 34.6dB to 43.8dB.

Embodiment 3

[0034] The preparation method of this example is basically the same as that of Example 1, except that the luffa charcoal is burned to 1500°C.

[0035] After testing, the static water contact angle of the polymer conductive material prepared in this example close to the sandpaper surface is 148.7±2°, and the static water contact angle of the evaporation surface is 135.2±2°. The material exhibits excellent superhydrophobicity. The polymer conductive material has a U-band electromagnetic shielding effect ranging from 37.2dB to 46.7dB.

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Abstract

The invention discloses a preparation method of a hydrophobic porous polymer conductive material. The preparation method comprises the following steps of performing high-temperature carbonization on abiological base material in an inert atmosphere to obtain a porous carbon-based framework; and enabling the porous carbon-based framework to be compactly paved on a rough structural template, and performing wetting on the porous carbon-based framework by a hydrophobic polymer solution, and then performing micro-phase separating, drying and stripping treatment to obtain the hydrophobic porous polymer conductive material. The preparation method is simple and convenient to operate; and the prepared hydrophobic porous polymer conductive material is light in weight, excellent in hydrophobic performance and high in shielding performance and can be widely applied to the electromagnetic shielding field.

Description

technical field [0001] The invention belongs to the field of electromagnetic shielding materials, and in particular relates to a hydrophobic porous polymer conductive material, a preparation method and an application. Background technique [0002] Due to the wide application of electromagnetic equipment, electromagnetic pollution is becoming more and more intense. Harmful electromagnetic waves not only interfere with the normal functions of electronic devices and even cause malfunctions, but also have adverse effects on human health. Therefore, it is necessary to develop electromagnetic shielding materials. [0003] Traditional electromagnetic shielding materials are mostly metal-based shielding materials, such as Ni, Ag, Fe and other metals or metal oxides dispersed in polyurethane, polycarbonate and other matrix materials. Metal-based electromagnetic shielding materials have the advantages of high electrical conductivity and excellent mechanical properties. Their electroma...

Claims

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Application Information

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IPC IPC(8): H05K9/00C09D127/16
CPCC09D127/16H05K9/0081
Inventor 翟文涛马小惠沈斌张利华郑文革
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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