Bamboo charcoal base electro-magnetic screen composite material and preparation method thereof
A composite material and electromagnetic shielding technology, applied in the fields of magnetic field/electric field shielding, chemical instruments and methods, electrical components, etc., can solve problems such as poor electrical and mechanical properties, electromagnetic wave leakage through heat dissipation holes, uneven distribution of fillers, etc., and achieve electrical conductivity High, good mechanical properties, good electromagnetic shielding effect
Inactive Publication Date: 2009-06-10
国际竹藤网络中心 +1
View PDF0 Cites 20 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] The present invention aims to solve the problems of uneven distribution of fillers, high cost, poor electrical and mechanical properties, and leakage of electromagnetic waves caused by cooling holes in the current filled electromagnetic shielding material. Corrosion, uniform filler distribution, simple molding process, low cost, good electromagnetic shielding effect bamboo charcoal-based electromagnetic shielding composite material and preparation method thereof
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreExamples
Experimental program
Comparison scheme
Effect test
specific Embodiment approach 1
[0014] Embodiment 1: In this embodiment, the bamboo charcoal-based electromagnetic shielding composite material consists of 20-90 parts by mass of polymer resin, 10-50 parts of bamboo charcoal powder, 4-7 parts of metal particle additives, 0-10 parts of It is made of magnetically permeable medium and 0.2-0.3 parts of coupling agent.
specific Embodiment approach 2
[0015] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the bamboo charcoal-based electromagnetic shielding composite material consists of 40 to 70 parts of polymer resin, 20 to 40 parts of bamboo charcoal powder, and 5 to 6 parts of metal in parts by mass. It is made of particle additives, 2-8 parts of magnetically permeable medium and 0.2-0.3 parts of coupling agent. Others are the same as in the first embodiment.
specific Embodiment approach 3
[0016] Embodiment three: the difference between this embodiment and embodiment one is that the bamboo charcoal-based electromagnetic shielding composite material consists of 60 parts by mass of polymer resin, 30 parts of bamboo charcoal powder, 5 parts of metal particle additives, 6 parts of Made of magnetically permeable medium and 0.3 parts of coupling agent. Others are the same as in the first embodiment.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| Conductivity | aaaaa | aaaaa |
| Particle size | aaaaa | aaaaa |
| Pore size distribution | aaaaa | aaaaa |
Login to View More
Abstract
The invention discloses a bamboo charcoal-based electromagnetic shielding composite material and a method for preparing the same, which relate to an electromagnetic shielding composite material and a method for preparing the same. The invention solves the problems that the prior filling-type electromagnetic shielding material has uneven distribution of filler and poor electrical and mechanical performance. The bamboo charcoal-based electromagnetic shielding composite material is prepared from polymer resin, bamboo charcoal powder, a metal particle additive, a magnetic medium and a coupling agent. The preparation method comprises: bamboo is prepared into bamboo charcoal powder; the additive and magnetic powder for producing metal particles and the bamboo charcoal powder are mixed by a solution blending method; and after drying, the bamboo charcoal powder adhered with the metal particles is mixed with the coupling agent and the polymer resin and is dried, cured, pressed, molded and calcined to obtain the bamboo charcoal-based electromagnetic shielding composite material adhered with the metal particles. The bamboo charcoal-based electromagnetic shielding composite material manufactured through the method has shielding efficiency of more than or equal to 40dB in the shielding range between 500MHz and 1.5GHz, and can be applied to aerospace, military, home appliances and other fields.
Description
technical field [0001] The invention relates to an electromagnetic shielding composite material and a preparation method thereof. Background technique [0002] With the rapid development of electronic technology, problems such as electromagnetic interference and electromagnetic environmental pollution have become more and more serious. Electromagnetic radiation will cause electromagnetic interference to various electronic equipment and information systems, cause data transmission errors, and cause various accidents. Long-term exposure of the human body to electromagnetic radiation can change the structure of cell membranes and proteins, destroy the biological structure and nervous system of the human body, cause vision loss, memory loss, mental disorders and other consequences, and even cause cancer and leukemia in severe cases. Therefore, the problem of electromagnetic interference has received extensive attention. The use of electromagnetic shielding materials is one of t...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): C09K3/00H05K9/00
Inventor 江泽慧张东升刘正锋
Owner 国际竹藤网络中心