Wave-absorbing coating and preparation method thereof
A wave-absorbing coating and raw material technology, applied to radiation-absorbing coatings, epoxy resin coatings, polyurea/polyurethane coatings, etc., can solve problems such as narrow wave-absorbing frequency band, poor wave-absorbing performance, and poor oxidation resistance, and achieve Improve weather resistance, improve coating effect, and increase the effect of coating thickness
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Embodiment 1
[0022] The raw materials of the modified wave-absorbing coating include: 2 parts of resin matrix, 20 parts of modified wave-absorbing iron powder, 1 part of diluent, 1 part of filler, 0.4 parts of anti-settling agent, and 0.3 parts of curing agent;
[0023] Add 20g of wave-absorbing iron powder to 100mL of A-1120 n-butanol solution with a mass fraction of 10%, ultrasonically disperse for 20min, then add 2mL of ammonia solution (PH≥8), 6mL of deionized water, and 1mL of silane coupling agent KH550 Ethanol solution, ultrasonically disperse for 50min, then add 1.5mL methyl orthosilicate ethanol solution, stir and deposit in a constant temperature water bath at 40°C for 6h in the reaction kettle, separate by centrifugation, wash the separated solid product with ethanol, and place in nitrogen Dry in a protected oven at 60° C. for 20 hours, and grind the microwave-absorbing iron powder particles coated with silica on the surface in a ball mill to obtain modified microwave-absorbing i...
Embodiment 2
[0025] The raw materials of the modified wave-absorbing coating include: 1 part of resin matrix, 10 parts of modified wave-absorbing iron powder, 0.5 part of diluent, 2 parts of filler, 0.4 part of anti-settling agent, and 0.3 part of curing agent;
[0026] Add 20g of wave-absorbing iron powder to 100mL of A-1120 n-butanol solution with a mass fraction of 10%, ultrasonically disperse for 20min, then add 2mL of ammonia solution (PH≥8), 6mL of deionized water, and 1mL of silane coupling agent A -1130 ethanol solution, ultrasonically disperse for 50min, then add 4mL tetraethyl orthosilicate ethanol solution, stir and deposit in a 40°C constant temperature water bath for 6h in the reaction kettle, separate by centrifugation, wash the separated solid product with ethanol, place in Dry in an oven at 60° C. protected by nitrogen for 20 hours, and grind the microwave-absorbing iron powder particles coated with silica on the surface in a ball mill to obtain modified microwave-absorbing ...
Embodiment 3
[0028] The raw materials of the modified wave-absorbing coating include: 1.5 parts of resin matrix, 18 parts of modified wave-absorbing iron powder, 0.8 parts of diluent, 5 parts of filler, 0.3 parts of anti-settling agent, and 0.3 parts of curing agent;
[0029] Add 20g of wave-absorbing iron powder to 100mL of 10% KH550 n-butanol solution, ultrasonically disperse for 20min, then add 2mL of ammonia solution (PH≥8), 6mL of deionized water, 1mL of silane coupling agent A-1130 Ethanol solution, ultrasonically disperse for 50min, then add 6mL orthopropyl silicate ethanol solution, stir and deposit in a constant temperature water bath at 40°C for 6h in the reaction kettle, separate by centrifugation, wash the separated solid product with ethanol, and place it under nitrogen protection Dry in an oven at 60°C for 20 hours, and grind the microwave-absorbing iron powder particles coated with silica on the surface in a ball mill to obtain modified microwave-absorbing iron powder. Add t...
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