Composite coating for protecting medium-high-frequency electromagnetic radiation and preparation method of composite coating
A composite coating and electromagnetic wave technology, applied in coatings and other directions, can solve problems such as waste, achieve the effects of improving radiation resistance, increasing resource value, and enriching pores
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[0022] Example 1
[0023] A composite coating used to protect medium and high frequency electromagnetic wave radiation. 100g composite coating consists of 5g micro-nano mussel shell powder, 8g graphene, magnetic Fe 4 O 3 10g, curing agent 3g, defoaming agent 2g, water 5g and solvent 67g; curing agent is 2-methylimidazole; defoaming agent is emulsified silicone oil; solvent is polyurethane. The micro-nano mussel shell powder is prepared by cleaning the mussel shells and air-drying, crushing to 10nm~100nm, and calcining at 580℃ for 5 hours. The SEM image of the activated micro-nano mussel shell powder is as follows figure 2 As shown, the SEM image before activation is as figure 2 As shown, it can be seen that the pores of the activated micro / nano mussel shell powder are more regular and orderly, and the impurities and debris are reduced, and the pores are more unobstructed. Magnetic Fe 4 O 3 Prepared by the following process: 11.92gFeCl 3 ·6H 2 O and 3.66gFeSO 4 ·7H 2 O was diss...
Example Embodiment
[0025] Example 2
[0026] A composite coating used to protect medium and high frequency electromagnetic wave radiation. 100g of composite coating consists of 10g micro-nano mussel shell powder, 10g graphene, and magnetic Fe 4 O 3 12g, 3.5g curing agent, 3g defoamer, 7g water and 54.5g solvent; curing agent is dodecyl alcohol ester; defoaming agent is higher alcohol fatty acid ester compound; solvent is polyurethane. Micro-nano mussel shell powder is prepared by cleaning the mussel shells, air-drying, crushing to 10nm~100nm, and calcining at 600℃ for 4 hours; magnetic Fe 4 O 3 Prepared by the following process: 11.92gFeCl 3 ·6H 2 O and 3.66gFeSO 4 ·7H 2 O was dissolved in 50mL of distilled water, stirred for 30min under nitrogen atmosphere, then heated to 60℃, and then added 7.7mL of 25% NH 3 ·H 2 O reacts for 75min, then add 2.5mL oleic acid, heat up to 70℃ and mature for 75min to obtain 5-10nm magnetic Fe 3 O 4 , And then washed with absolute ethanol 4 times.
[0027] The preparati...
Example Embodiment
[0028] Example 3
[0029] A composite coating used to protect medium and high frequency electromagnetic wave radiation. The difference from Example 2 is that 100g of composite coating is made of 17g micro-nano mussel shell powder, 13g graphene, magnetic Fe 4 O 3 It is composed of 15g, 4g curing agent, 4g defoamer, 11g water and 35g solvent.
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