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Electromagnetic wave shielding sheet comprising carbon composite fiber manufactured by electrospinning and method for manufacturing same

一种制造方法、屏蔽板的技术，应用在静电纺丝、人造丝制造、磁场/电场屏蔽等方向，能够解决金属易发生氧化等问题，达到防止氧化、保证传导性、高电磁波屏蔽效率的效果

Active Publication Date: 2016-01-06
KOREA INST OF IND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Metals are prone to oxidation when in contact with the outside world, so there is such a problem in the above-mentioned patents

Method used

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  • Electromagnetic wave shielding sheet comprising carbon composite fiber manufactured by electrospinning and method for manufacturing same
  • Electromagnetic wave shielding sheet comprising carbon composite fiber manufactured by electrospinning and method for manufacturing same
  • Electromagnetic wave shielding sheet comprising carbon composite fiber manufactured by electrospinning and method for manufacturing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0104] Example 1: Manufacturing of electromagnetic wave shielding board based on composite fiber mesh impregnation

[0105] A solution (core) obtained by mixing 5 g of Cu with a particle size of 20-40 nm in ethanol was prepared as the first spinning solution, and a 12w% PAN solution (external) dissolved in DMF was prepared as the second spinning solution.

[0106] The first spinning solution and the second spinning solution are respectively connected to the inner and outer sides of the dual nozzles and set on a syringe pump, and then the flow rate is fixed at 0.005 ml / h. At this time, the collector and the spinneret are set vertically, and the collector is designed with conductive metal electrodes. The distance between the spinneret and the collector is fixed at 15 cm, and a voltage of 15 kV is applied to obtain a mesh-like composite fiber (100-500 nm in diameter).

[0107] The composite fiber was put into a heating furnace, and a carbonization process was performed at 1000° C. for ...

Embodiment 2

[0109] Example 2: Manufacturing based on short-cut composite fiberboard molding

[0110] The net-shaped core-shell carbon composite fiber manufactured in Example 1 was crushed with a length of 0.001 to 1 mm using a shredder. The obtained short-cut composite fiber is mixed with polymethyl methacrylate (PMMA) in a weight ratio of 1:3, and then pressure is applied, and an electromagnetic wave shielding plate is manufactured by plate molding.

Embodiment 3

[0111] Example 3: Manufacturing of electromagnetic wave shielding plate including Ag nanofibers in the core

[0112] It was carried out in the same manner as in Example 1, in which, as the first spinning solution, 3 g of AgNO was mixed with 3 A solution (core) obtained by mixing 5 grams of Cu with a particle size of 20-40 nm with 0.5 grams of PVP in 10 ml of ethanol solution (core). After manufacturing core-shell carbon composite fibers (Cu, Ag / CNF), perform the impregnation process To make an electromagnetic wave shielding board.

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Abstract

The present invention relates to an electromagnetic wave shielding sheet comprising a carbon composite fiber manufactured by electrospinning and a method for manufacturing the same and, more specifically, to an electromagnetic wave shielding sheet and a method for manufacturing the same, the sheet comprising: a carbon composite fiber having a core-shell structure composed of an external shell comprising carbon fibers, and a core comprising metal nanoparticles arranged in a lengthwise direction of the fibers thereinside; and a resin. The electromagnetic wave shielding sheet can prevent oxidation of the metal and secure conductivity in the lengthwise direction of the carbon fibers by arranging the metal nanoparticles inside the carbon fibers as electromagnetic wave shielding materials, and thus the electromagnetic wave shielding sheet can be applied as an electromagnetic wave shielding material in various industrial fields.

Description

Technical field [0001] The present invention relates to an electromagnetic wave shielding plate including composite fibers manufactured by electrospinning in order to improve conductivity and electromagnetic wave shielding efficiency, and a manufacturing method thereof. Background technique [0002] In recent years, asymmetric digital subscriber lines (ADSL) have been widely popularized, and fields requiring electromagnetic wave shielding measures such as next-generation mobile phones or intelligent transportation systems (ITS) have become more diverse. In addition, the rapid spread of PCs, mobile phones, and digital devices that show trends such as miniaturization and light weight have caused electromagnetic waves to even spread to offices or homes. With the development of the electronics industry, the threat of electromagnetic wave damage has further increased. [0003] From computer malfunctions to factory burn accidents, the electromagnetic wave damage has various manifestation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K9/00
CPCD01D5/003D01F1/106D01F8/18D01F9/14H05K9/009H05K9/00D10B2101/12
Inventor 许晕金熙珍金寿珍申明撤李钟浩朴春根
Owner KOREA INST OF IND TECH
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