Broadband electromagnetic wave shielding material and preparation method thereof
A shielding material and electromagnetic wave technology, applied in the fields of magnetic/electric field shielding, electrical components, etc., can solve the problems of limited electromagnetic wave absorption capacity, poor shielding effect, carbon nanotube agglomeration, etc., to achieve excellent shielding performance, reduce reflection, and promote absorption. Effect
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Embodiment 1
[0033] A manufacturing method of broadband electromagnetic wave shielding leather:
[0034] (1) According to the ratio of parts by weight, 20 parts of Cu 2+ Introduced into 100 parts of ball-milled carbon nanotube pipes; the Cu 2+ from Cu at a concentration of 20.0 g / L 2+ solution.
[0035] (2) The above-prepared materials were reduced in an atmosphere of hydrogen-argon gas mixture at 340 °C (where hydrogen accounted for 5% of the volume ratio of the gas mixture), and after cooling, carbon nanotube-embedded copper nanoparticles (CuNPs) were obtained. @MWCNTs) composites;
[0036] (3) Spray polymethyl methacrylate (PMMA) evenly on the surface of sheep leather for back cover and dry, and the spraying amount is controlled at ~30g / m 2 ; Then, disperse CuNPs@MWCNTs in ethanol, spray evenly on the surface of the leather to form an electromagnetic wave matching absorbing layer, and the spraying amount is controlled at 4.0 wt%; finally, spray PMMA evenly on the surface of the matchi...
Embodiment 2
[0039] A manufacturing method of broadband electromagnetic wave shielding leather:
[0040] (1) 20 parts of Ag were slowly added dropwise and dried + Introduced into 100 parts of ball-milled carbon nanotube pipes; the Ag + From Ag at a concentration of 20.0 g / L + solution.
[0041] (2) The above-prepared material was reduced in an atmosphere of hydrogen-argon gas mixture at 200 °C (where hydrogen accounted for 5% of the gas mixture volume), and after cooling, carbon nanotube-embedded silver nanoparticle AgNPs@ MWCNTs composite materials;
[0042] (3) Spray PMMA evenly on the surface of sheep leather for back cover and dry, and the spraying amount is controlled at ~30 g / m 2 ; Then, AgNPs@MWCNTs were dispersed in acetone, sprayed evenly on the surface of the leather to form an electromagnetic wave matching absorbing layer, and the spraying amount was controlled at 4.0 wt%; finally, PMMA was evenly sprayed on the surface of the matching absorbing layer for capping and drying,...
Embodiment 3
[0045] A manufacturing method of broadband electromagnetic wave shielding leather:
[0046] (1) 40 parts of Ag were slowly added dropwise and dried + Introduced into 100 parts of ball-milled carbon nanotube pipes; the Ag + From Ag at a concentration of 40.0 g / L + solution.
[0047] (2) Place the above-prepared material in a 100.0% hydrogen atmosphere at 200 °C for reduction, and after cooling, a carbon nanotube-embedded silver nanoparticle (AgNPs@MWCNTs) composite material is obtained;
[0048] (3) Spray polyurethane (PU) evenly on the surface of sheep leather for back cover and dry, and the spraying amount is controlled at ~30 g / m 2 ; Then, AgNPs@MWCNTs were dispersed in ethanol, sprayed evenly on the surface of the leather to form an electromagnetic wave matching absorbing layer, and the spraying amount was controlled at 3.3 wt%; finally, PMMA was evenly sprayed on the surface of the matching absorbing layer for capping and drying, spraying Quantity controlled at ~20 g / m...
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