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Electromagnetic wave shielding coating containing nickel-clad copper calcium magnesium silicate whiskers and preparation method thereof

A technology of calcium magnesium silicate and nickel-plated copper, which is applied in the direction of epoxy resin coating, coating, etc., can solve the problem of enlargement, etc., and achieve the effect of convenient use, easy promotion, and low investment

Inactive Publication Date: 2010-06-16
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The main technical problem to be solved by the present invention is to provide an electromagnetic wave shielding composite coating containing nickel-plated copper calcium magnesium silicate mineral whiskers and its preparation method in view of the current state of the art. Single-crystal substance-nickel-plated copper calcium magnesium silicate mineral whiskers, on the one hand, improve the quality of the conductive network skeleton formed after the coating is cured, improve its electrical conductivity, on the other hand, reduce the reflection loss of the coating to electromagnetic waves, and increase the eddy current absorption loss, improve its electromagnetic wave shielding effectiveness, and reduce its secondary pollution to the electromagnetic environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Add the prepared silane solution with a concentration of 7wt% to nickel-plated copper calcium magnesium silicate mineral whiskers and average Particle diameter is in the nickel powder of 2.5 μm, and the proportioning of its composite barrier filler is: nickel-plated copper calcium magnesium silicate mineral whisker: nickel powder=5wt%: 60wt%, stir with high-speed mixer, disperse 40 minutes, then Drying, the drying temperature is 100°C. Mix 25wt% epoxy resin with the above-mentioned surface-treated composite shielding filler and butanol, grind it with a grinder for 2 to 5 times at room temperature, filter, add an appropriate amount of solvent to adjust the viscosity of the coating to 20 measured with 4 cups of coating ~50 seconds to obtain the electromagnetic wave shielding composite coating. The prepared coating has an electromagnetic wave shielding effect of 35dB-60dB within the frequency range of 10kHz-1.5GHz.

Embodiment 2

[0037]Add the prepared aluminate solution with a concentration of 8wt% to nickel-plated copper calcium magnesium silicate mineral whiskers containing 20wt% Ni and 8wt% Cu, with an aspect ratio of 20-100, a length of 15-100 μm, and a diameter of 0.2-2 μm. And average particle diameter is in the nickel powder of 4 μ m, and the proportioning of its composite barrier filler is: nickel-plated copper calcium magnesium silicate mineral whisker: =7wt%: 55wt% in the nickel powder, stir with high-speed mixer, disperse 50 minutes , and then dried at a drying temperature of 105°C. Mix 20wt% epoxy resin with the above-mentioned surface-treated composite shielding filler and butanol, grind it with a grinder for 2 to 5 times at room temperature, filter, add an appropriate amount of solvent to adjust the viscosity of the coating to a viscosity of 20 to 20 when measured with 4 cups of coating In 50 seconds, an electromagnetic wave shielding composite coating is obtained. The prepared coating ...

Embodiment 3

[0039] Add the prepared titanate solution with a concentration of 4wt% to nickel-plated copper calcium magnesium silicate mineral whiskers containing 30wt% Ni and 4wt% Cu, with an aspect ratio of 20-100, a length of 15-100 μm, and a diameter of 0.2-2 μm And average particle diameter is in the nickel powder of 3 μm, and the proportioning of its composite barrier filler is: nickel-plated copper calcium magnesium silicate mineral whisker: =8wt%: 50wt% in the nickel powder, stir with high-speed mixer, disperse 45 minutes , and then dried at a drying temperature of 110°C. Mix 30wt% epoxy resin with the above-mentioned surface-treated composite barrier filler and dibutyl ester, grind it with a grinder for 2 to 5 times at room temperature, filter, add an appropriate amount of solvent to adjust the viscosity of the coating to 20 measured with 4 cups of coating ~50 seconds to obtain the electromagnetic wave shielding composite coating. The prepared coating has an electromagnetic wave ...

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Abstract

The invention discloses an electromagnetic wave shielding coating containing nickel-clad copper calcium magnesium silicate whiskers and a preparation method thereof. The components of the coating comprise film-forming resin, conductive filler, coupling agent and solvent. The coating is characterized in that the conductive filler is a mixture of the nickel-clad copper calcium magnesium silicate whiskers and nickel powder; and the coating comprises the following components in percentage by weight: 0.5 to 20 percent of nickel-clad copper calcium magnesium silicate whiskers, 25 to 70 percent of nickel powder, 20 to 50 percent of epoxy resin, 0.2 to 15 percent of coupling agent and 20 to 70 percent of solvent. The preparation process flows comprise surface coupling treatment for the nickel-clad copper calcium magnesium silicate whiskers and the nickel powder, coating preparation and the like. The coating is in a frequency range of 10kHz to 1.5GHz; the electromagnetic wave shielding efficacy is 35 to 60dB; and the coating has the performance of resisting electromagnetic wave interference, electronic information leakage and electromagnetic environment pollution, and can be widely applied in the aspects of shielding the electromagnetic wave of electronic information products, building an electromagnetic wave shielding chamber and an electronic information confidentiality chamber and the like.

Description

1. Technical field [0001] The invention belongs to the field of electromagnetic wave shielding materials, in particular to an electromagnetic wave shielding composite coating containing nickel-plated copper calcium magnesium silicate mineral whiskers and a preparation method thereof. 2. Background technology [0002] With the rapid development of electronic information technology, the energy density of electromagnetic waves in the natural environment is increasing, the frequency spectrum is becoming denser, and the pollution of the electromagnetic environment is becoming more and more serious. Electromagnetic radiation has potential and long-term effects on the health of the public; it has strong interference on household appliances, medical equipment, military facilities, etc., and may even cause disastrous consequences. Electromagnetic wave radiation pollution has become a major public hazard in today's society. Electromagnetic interference, electromagnetic information lea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/00C09D7/12
Inventor 管登高孙传敏钟素华林金辉王自友卢长寿孙遥徐冠立
Owner CHENGDU UNIVERSITY OF TECHNOLOGY