Conductive super-crosslinking conjugated polymer electromagnetic wave absorbing material and preparation method thereof

A technology of conjugated polymers and conductive polymers, applied in electrical components, magnetic field/electric field shielding, etc., can solve the problems of less conductive polymer surface and poor electromagnetic wave absorption effect, and achieve low cost, broad economic prospects and wide application market effect

Pending Publication Date: 2022-08-09
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of this, the present invention aims to propose a conductive super-crosslinked conjugated polymer electromagnetic wave absorbing material and its preparation method to solve the problem of electromagnetic wave absorption caused by conductive polymers in nanopore channels and less surface in the prior art. bad question

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  • Conductive super-crosslinking conjugated polymer electromagnetic wave absorbing material and preparation method thereof
  • Conductive super-crosslinking conjugated polymer electromagnetic wave absorbing material and preparation method thereof
  • Conductive super-crosslinking conjugated polymer electromagnetic wave absorbing material and preparation method thereof

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preparation example Construction

[0043] The preparation method of the conductive hypercrosslinked conjugated polymer of the present invention comprises the following steps:

[0044] 1) Disperse brominated aromatic hydrocarbon monomer, borate ester monomer, potassium carbonate and catalyst in a solvent, under inert gas protection, heat to 80~100 ℃ and react for 48~72 hours, then the reaction solution is cooled to room temperature, poured The solid was collected by filtration in deionized water, the filter cake was washed with water, ethanol, methanol and dichloromethane in turn, then purified by Soxhlet in tetrahydrofuran for 2 to 4 days, and vacuum dried to obtain the conjugated microporous polymer;

[0045] 2) Disperse the conjugated microporous polymer in a 1,2-dichloroethane solution containing a crosslinking agent, and add anhydrous ferric chloride under magnetic stirring. Under the protection of inert gas, the reaction was heated to 80-100 °C for 24 hours, then the reaction solution was cooled to room te...

Embodiment 1

[0051] The present invention provides a preparation method of a conductive hypercrosslinked conjugated polymer electromagnetic wave absorbing material, comprising the following steps:

[0052] Step 1, Synthesis of Conjugated Microporous Polymer (CMP): First, weigh the organic monomers 1,3,5-tris(4-bromophenyl)benzene 2g and 4,4'-bis(4,4,5 , 3g of 5-tetramethyl-1,3,2-dioxaborolane-2-yl)biphenyl was added to 100ml of 1,4-dioxane and dispersed uniformly by ultrasonic, and the catalyst Pd(PhCN)2Cl2 was added quickly. (0.2 g) and alkali K2CO3 (4.0 M, 10 mL) to prevent oxidation. Under a nitrogen atmosphere, the mixture was slowly warmed to 90°C, and the temperature was maintained for 72h. After the reaction, the suspension was cooled to room temperature and filtered with suction. The filter cake was washed with water, ethanol, methanol and dichloromethane, and purified by Soxhlet in tetrahydrofuran solvent for 3 days. The gray powder was obtained by vacuum drying at 60 °C for 12 ...

Embodiment 2

[0056] A preparation method of a conductive hypercrosslinked conjugated polymer electromagnetic wave absorbing material comprises the following steps:

[0057] Step 1 is the same as in Example 1.

[0058] Step 2 is the same as in Example 1.

[0059] Step 3: Synthesis of conductive hypercrosslinked conjugated polymer (HCP-2): The dark yellow powder (2g) obtained in step 2 and pyrrole (10g) were mixed in a weight ratio of 1:5 and dispersed in 600ml methanol for 30min, then , the dispersion was evaporated to provide a mixture of pyrrole and polymer, pre-cooled FeCl3 (1 L, 1 mol / L) was added and stirred at room temperature for 4 h. The sample was obtained by filtration, and the filter cake was washed with a large amount of water and ethanol, and dried under reduced pressure to obtain a black powder. image 3 As can be seen from the figure, polypyrrole grows out of fibers extending from the interior of the hypercrosslinked conjugated polymer.

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Abstract

The invention provides a conductive super-crosslinking conjugated polymer electromagnetic wave absorbing material and a preparation method thereof. The conductive super-crosslinking conjugated polymer electromagnetic wave absorbing material comprises a conductive polymer and a super-crosslinking conjugated polymer, and the conductive polymer is distributed in a nanopore channel of the super-crosslinking conjugated polymer and extends to the surface. Under the condition of a low filling ratio of 10wt%, the effective absorption bandwidth of the synthesized conductive super-crosslinked conjugated polymer can reach 5.76 GHz, and the maximum absorption can reach-52.68 dB under a proper thickness. The preparation method is simple in process, low in cost, beneficial to large-scale preparation, wide in application market in the field of electromagnetic protection and wide in economic prospect.

Description

technical field [0001] The invention relates to the technical field of electromagnetic wave absorption materials, in particular to a conductive hypercrosslinked conjugated polymer electromagnetic wave absorption material and a preparation method thereof. Background technique [0002] The rapid development of modern electronic technology, especially high-power electronic devices, multi-band radar and highly integrated circuits, has produced increasingly serious electromagnetic radiation, which has adversely affected human health, information security and the normal operation of sensitive electronic equipment. To solve these problems, the study of electromagnetic absorbing materials has received extensive attention. In particular, carbonaceous materials include graphene (invention patent CN201811417776.8), carbon nanotubes, and carbon fibers; magnetic materials include carbonyl iron (invention patent CN201510002989.4), core-shell α-Fe2O3@CoFe2O4, NiCu alloys, and their mixture...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L65/00C08L79/04H05K9/00
CPCC08L65/00C08L79/04H05K9/0081
Inventor 谢志鹏陈浩叶志民
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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