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Electromagnetic shielding paper and preparation method thereof

A technology of electromagnetic shielding and preparation steps, applied in the field of electromagnetic shielding paper and its preparation, can solve the problems of electromagnetic wave leakage, uncontrolled behavior, permanent damage, etc., and achieve the effect of improving stability and stable properties

Active Publication Date: 2018-01-26
TAIZHOU LION KING SIGNAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the development of modern high-tech, the problems of electromagnetic interference (Electromagnet Interference, EMI) and electromagnetic compatibility (Electromagnetic Compatibility, EMC) caused by electromagnetic waves are becoming more and more serious, which not only cause interference and damage to electronic instruments and equipment, but also affect their normal work, seriously restricting our country. The international competitiveness of electronic products and equipment will also pollute the environment and endanger human health; in addition, the leakage of electromagnetic waves will also endanger the security of national information security and military core secrets
In particular, the electromagnetic pulse weapon as a new concept weapon has made a substantial breakthrough, which can directly strike electronic equipment, power systems, etc., causing temporary failure or permanent damage to information systems, etc. Its delivery methods are diverse and extremely destructive. Strong, and powerful electromagnetic pulses can also cause damage to the human body, causing nervous disorders and out-of-control behaviors, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] An electromagnetic shielding paper and a preparation method thereof, the steps of preparing the electromagnetic shielding paper are as follows:

[0033]Add 2kg of whisker-like carbon nanotubes into 10L of potassium nitrate solution with a mass concentration of 14%, ultrasonically disperse for 1 hour to form a uniform suspension, then add 0.14L of concentrated sulfuric acid with a mass concentration of 95%, and Treat for 8.5 hours to acidify the surface of carbon nanotubes with -COOH functional groups, then rinse with distilled water until neutral and remove salt, and then evaporate and dry at room temperature and low pressure (0.05MPa) for 16 hours to obtain carbon nanotubes with high surface activity; Add the obtained carbon nanotubes and 7kg epoxy resin into 15kg solvent, ultrasonically disperse for 2 hours, then heat up to 160°C, react for 10 hours, and oscillate evenly at the same time. After the reaction is completed, a composite material of carbon nanotubes and the...

Embodiment 2

[0036] An electromagnetic shielding paper and a preparation method thereof, the steps of preparing the electromagnetic shielding paper are as follows:

[0037] Add 1kg of whisker-like carbon nanotubes into 6L of sodium nitrate solution with a mass concentration of 15%, ultrasonically disperse for 1.5h to form a uniform suspension, then add 0.08L of concentrated sulfuric acid with a mass concentration of 98%. Under treatment for 8 hours to acidify the surface of carbon nanotubes with -COOH functional groups, then rinse with distilled water until neutral and remove salt, and then evaporate and dry at normal temperature and low pressure (0.05MPa) for 18 hours to obtain carbon nanotubes with high surface activity; Add the obtained carbon nanotubes and 3kg of furfuryl alcohol resin into 8kg of solvent, ultrasonically disperse for 2.5 hours, then heat up to 170°C, react for 8 hours, and vibrate evenly at the same time. After the reaction is completed, a composite material of carbon n...

Embodiment 3

[0040] An electromagnetic shielding paper and a preparation method thereof, the steps of preparing the electromagnetic shielding paper are as follows:

[0041] Add 1.7kg of whisker-like carbon nanotubes into 10L of 13% sodium nitrate solution, ultrasonically disperse for 1.5h to form a uniform suspension, then add 0.14L of concentrated sulfuric acid with a mass concentration of 98%. Treat at room temperature for 8 hours to acidify the surface of carbon nanotubes with -COOH functional groups, then rinse with distilled water until neutral and remove salt, and then evaporate and dry at room temperature and low pressure (0.05MPa) for 18 hours to obtain carbon nanotubes with high surface activity; Add the obtained carbon nanotubes and 5.5kg of maleimide resin to 15kg of solvent, ultrasonically disperse for 2.5 hours, then heat up to 155°C, react for 9 hours, and shake evenly at the same time. After the reaction is completed, carbon nanotubes and thermosetting resins are obtained. R...

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Abstract

The invention provides electromagnetic shielding paper and a preparation method thereof, and is characterized in that whisker-shaped carbon nanotubes are synthesized by a chemical vapor deposition method, thermosetting resin is used as a surface graft material for the carbon nanotubes, the carbon nanotubes are subjected to acidification surface treatment and then are grafted with the thermosettingresin, a composite material with high performance is formed, the composite material is composited with paper fibers, and then the electromagnetic shielding composite paper is prepared by a vacuum suction filtration method. The composite paper has both flexibility and electrical conductivity, and has remarkable functions of preventing electromagnetic information leakage, preventing electromagneticinterference, preventing infrared imaging and the like; the shape and resistance are controllable; and the paper fiber and the carbon nanotubes in the composite paper can be perfectly combined and are not easy to fall off, and the properties are stable.

Description

technical field [0001] The invention relates to the field of preparation of electromagnetic shielding paper, in particular to an electromagnetic shielding paper and a preparation method thereof. Background technique [0002] With the development of modern high-tech, the problems of electromagnetic interference (Electromagnet Interference, EMI) and electromagnetic compatibility (Electromagnetic Compatibility, EMC) caused by electromagnetic waves are becoming more and more serious, which not only cause interference and damage to electronic instruments and equipment, but also affect their normal work, seriously restricting our country. The international competitiveness of electronic products and equipment will also pollute the environment and endanger human health; in addition, the leakage of electromagnetic waves will also endanger the security of national information security and military core secrets. In particular, the electromagnetic pulse weapon as a new concept weapon ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H13/50D21H17/48D21H17/52D21H17/56D21H17/59D21H21/14H05K9/00
Inventor 陈庆司文彬
Owner TAIZHOU LION KING SIGNAL
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