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Preparation method of porous network composite material with shielding and sound absorption functions

A composite material and porous network technology, which is applied in the field of preparation of porous network composite materials, can solve the problems of low mechanical properties of composite materials, difficult application effect, unenvironmental protection, etc. cost saving effect

Pending Publication Date: 2021-12-24
ANHUI AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the composite material prepared by the above method shows good electromagnetic shielding performance, it still has the problems of high cost and environmental protection due to the use of graphene and carbon nanotubes, and there is a more serious problem: The mechanical properties of the prepared composite materials are low, and it is difficult to produce practical application effects on a large scale

Method used

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  • Preparation method of porous network composite material with shielding and sound absorption functions
  • Preparation method of porous network composite material with shielding and sound absorption functions
  • Preparation method of porous network composite material with shielding and sound absorption functions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A porous network composite material with both shielding and sound absorption functions in this embodiment is used for home decoration materials, and its preparation method is as follows:

[0043] (1) Preparation of Pine Cone Charcoal

[0044] a. The agricultural and forestry waste pine cones are preliminarily crushed; in order to reduce the dirt and impurities in the pine cones, after crushing, the pine cones are soaked in tap water for 24 hours, and then rinsed repeatedly with running water for 2 to 4 times; after natural drying, The rice husks were dried at 105°C for 24 hours in a blower drying oven to keep the water content below 3%. Finally, the pine cones were crushed with a universal grinder and screened with a 100-mesh sieve to obtain 100-mesh pine cone powder.

[0045] b. Put the pine cone powder into a tube furnace, raise the temperature to 800°C at a heating rate of 10°C / min, and keep the temperature constant for 1 hour, using high-purity nitrogen as a protect...

Embodiment 2

[0058] A porous network composite material with both shielding and sound absorption functions in this embodiment is used for home decoration materials, and its preparation method is as follows:

[0059] (1) Preparation of Pine Cone Charcoal

[0060] a. The agricultural and forestry waste pine cones are preliminarily crushed; in order to reduce the dirt and impurities in the pine cones, after crushing, the pine cones are soaked in tap water for 24 hours, and then rinsed repeatedly with running water for 2 to 4 times; after natural drying, The rice husks were dried at 105°C for 24 hours in a blower drying oven to keep the water content below 3%. Finally, the pine cones were crushed with a universal grinder and screened with a 100-mesh sieve to obtain 100-mesh pine cone powder.

[0061] b. Put the pine cone powder into a tube furnace, raise the temperature to 800°C at a heating rate of 10°C / min, and keep the temperature constant for 1 hour, using high-purity nitrogen as a protect...

Embodiment 3

[0075] A porous network composite material with both shielding and sound absorption functions in this embodiment is used for home decoration materials, and its preparation method is as follows:

[0076] (1) Preparation of Pine Cone Charcoal

[0077] a. The agricultural and forestry waste pine cones are preliminarily crushed; in order to reduce the dirt and impurities in the pine cones, after crushing, the pine cones are soaked in tap water for 24 hours, and then rinsed repeatedly with running water for 2 to 4 times; after natural drying, The rice husks were dried at 105°C for 24 hours in a blower drying oven to keep the water content below 3%. Finally, the pine cones were crushed with a universal grinder and screened with a 100-mesh sieve to obtain 100-mesh pine cone powder.

[0078] b. Put the pine cone powder into a tube furnace, raise the temperature to 800°C at a heating rate of 10°C / min, and keep the temperature constant for 1 hour, using high-purity nitrogen as a protect...

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Abstract

The invention provides a preparation method of a porous network composite material with shielding and sound absorption functions. The preparation method comprises the following steps: (1) carbonizing pre-pressed blocky loofah sponge or phenolic resin-treated blocky loofah sponge in a tubular furnace, and taking the blocky loofah sponge charcoal which is not modified or modified by copper particles as a subsequent material; (2) mixing epoxy resin with trichloromethane, then adding pinecone carbon, adding barium titanate, a curing agent and the like to prepare an epoxy resin-pinecone carbon mixture, firstly paving a layer of epoxy resin-pinecone carbon mixture on the bottom layer of a mold, then paving the blocky loofah sponge carbon, finally paving a layer of epoxy resin-pinecone carbon mixture, and finally, conducting curing in a hot press. The composite material has the advantages that the composite material not only has high conductivity, excellent electromagnetic shielding performance and certain sound absorption performance, but also has good mechanical performance, and reference value is provided for producing home decoration materials with the electromagnetic shielding performance and the sound absorption performance.

Description

technical field [0001] The invention relates to the technical field of electromagnetic shielding materials and sound-absorbing materials, in particular to a preparation method of a porous network composite material with both shielding and sound-absorbing functions. Background technique [0002] With the rapid development of electronic science and technology, electronic equipment products are being updated day by day, which gradually enriches people's daily life. However, the subsequent problems of electromagnetic pollution, electromagnetic interference and noise pollution will not only affect the normal operation of electronic equipment, but also cause varying degrees of harm to people's health, especially the radiation of high-frequency electromagnetic waves and Long-term noise is more harmful. Therefore, in order to hinder the influence of electromagnetic waves on electronic equipment and the human body, and the harm of noise to the human body, it is particularly importan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L1/28C08K7/24C08K9/02C08K3/24C08J9/00H05K9/00
CPCC08J9/0095C08J9/009C08J9/008C08J9/0066C08J9/0061H05K9/0081C08J2363/00C08J2401/28
Inventor 郭勇汪浩陈玉霞刘光辉张清扬徐润民邬珊珊
Owner ANHUI AGRICULTURAL UNIVERSITY
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