Wave absorbing agent solution and honeycomb wave absorbing material and preparation method thereof
A wave absorbing agent and solution technology, applied in paper coatings, no pigment coatings, textiles and papermaking, etc., can solve the problems of poor multi-layer mechanical properties, poor impedance matching, weak absorption, etc., to avoid the reduction of mechanical properties, Achieving the effect of broadband strong electromagnetic absorption
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[0024] The preparation method of the above-mentioned honeycomb absorbing material comprises:
[0025] S1. Preparation of wave absorbing agent solution: Dissolve the adhesive in the solvent according to the mass ratio, and mix well to obtain an adhesive solution; then add wave absorbing agent, flame retardant, wetting agent, and dispersant to the adhesive solution, and mix well Finally, the wave absorbing agent solution is obtained; wherein, the method of mixing uniformly can be stirred and mixed evenly by using a high-speed disperser, or can be mixed evenly by using a ball mill;
[0026] S2. Divide N areas on the surface of the substrate and N≥2, N is a natural number, apply the wave absorbing agent solution on the N areas of the surface of the substrate, and start from the first area, the second area... By analogy, the number of layers of wave absorbing agent solution applied to the Nth area increases sequentially, and it is dried after painting. Each layer of wave absorbing ...
Embodiment 1
[0032] (1) Preparation of wave absorbing agent solution: Weigh 1000g of absolute ethanol, 100g of conductive carbon black, 50g of acetylene carbon black, 100g of phenolic resin, 40g of tetrabromobisphenol A, 4g of wetting agent PE100, and 5g of dispersant SN5040. Pour the phenolic resin into absolute ethanol, and use a high-speed disperser to fully stir to obtain an adhesive solution; add conductive carbon black, acetylene carbon black, tetrabromobisphenol A, PE100, and SN5040 to the above adhesive solution, and use a high-speed disperser to fully stir evenly , to obtain a wave absorber solution.
[0033] (2) Preparation of honeycomb absorbing material: Divide the prepared honeycomb aramid paper into four different areas of A, B, C, and D, and mark the decomposition points with widths of 5mm, 7mm, 8.5mm, 4mm. First, paint the entire area of ABCD with wave-absorbing glue twice, and let it air for 5 minutes after each painting; then paint the BCD area once, and let it air for...
Embodiment 2
[0037] (1) Equipment of wave absorbing agent solution: Weigh 1000g of absolute ethanol, 150g of conductive carbon black, 100g of graphite powder, 180g of phenolic resin, 50g of tetrabromobisphenol A, 5g of wetting agent PE100, 4g of dispersant SN5040, and mix phenolic Pour the resin into absolute ethanol, and use a high-speed disperser to fully stir to obtain an adhesive solution; add conductive carbon black, graphite powder, tetrabromobisphenol A, PE100, and SN5040 to the above adhesive solution, and use a high-speed disperser to fully stir to obtain Absorbent solution.
[0038] (2) Preparation of honeycomb absorbing material: Divide the prepared honeycomb aramid paper into four different areas of A, B, C, and D, and mark the decomposition points with widths of 5mm, 7mm, 8.5mm, 4mm. First, paint the entire area of ABCD with wave-absorbing glue twice, and let it air for 5 minutes after each painting; then paint the BCD area once, and let it air for 5 minutes; then paint the...
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