Preparation method of lightweight melamine foam electromagnetic shielding material
A technology of melamine foam and electromagnetic shielding materials, applied in the fields of magnetic field/electric field shielding, electrical components, etc., can solve the problems of electronic control devices out of control, abnormal operation, interference with instruments, etc., to achieve enhanced bonding force, high porosity, Highlight the effect of structural stability
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Embodiment 1
[0020] 1, melamine foam pretreatment: the melamine foam cut into the appropriate size, into the ultrasonic cleaning machine ultrasonic cleaning and drying backup, wash with deionized water for 30min to remove impurities, and then the foam is placed in the blast oven to dry, the temperature is set to 80 ° C, the time is 8 hours;
[0021] 2. Preparation of graphene / melamine foam composite material: weigh a certain amount of pretreated melamine foam and soak it in a graphene oxide dispersion solution with a concentration of 0.5mg / mL, take it out and dry it in a blast oven after soaking, set the temperature to 80 °C, the time is 12 hours, and the graphene / melamine foam composite material is obtained;
[0022] 3. Preparation of graphene / silver nitrate / melamine composite foam material: the graphene / melamine foam composite material is soaked in 5g / L aqueous silver nitrate solution, and after soaking, it is taken out and placed in a blast oven for drying, the temperature is set to 80 °C, ...
Embodiment 2
[0025] Pretreatment of melamine foam: cut the melamine foam to a suitable size, put it into the ultrasonic cleaning machine for ultrasonic cleaning and drying, wash it with deionized water for 40min to remove impurities, and then place the foam in a blast oven to dry, the temperature is set to 80 ° C, the time is 8 hours;
[0026] 2. Preparation of graphene / melamine foam composite material: weigh a certain amount of pretreated melamine foam and soak it in a graphene oxide dispersion solution with a concentration of 0.7mg / mL, take it out and place it in a blast oven for drying, the temperature is set to 80 °C, the time is 12 hours, and the graphene / melamine foam composite material is obtained;
[0027] 3, graphene / silver nitrate / melamine composite foam material preparation: graphene / melamine foam composite soaked in 8g / L silver nitrate aqueous solution, soaked after soaking and placed in a blast oven for drying, the time is 4, the preparation of light melamine foam electrom...
Embodiment 3
[0029] 1, melamine foam pretreatment: the melamine foam cut into the appropriate size, into the ultrasonic cleaning machine ultrasonic cleaning and drying backup, wash with deionized water for 40min to remove impurities, and then the foam is placed in the blast oven to dry, the temperature is set to 80 °C, the time is 8 hours;
[0030] 2. Preparation of graphene / melamine foam composite material: weigh a certain amount of pretreated melamine foam and soak it in a graphene oxide dispersion solution with a concentration of 0.8mg / mL, take it out and dry it in a blast oven after soaking, set the temperature to 90 °C, the time is 12 hours, and the graphene / melamine foam composite material is obtained;
[0031]3. Preparation of graphene / silver nitrate / melamine composite foam material: the graphene / melamine foam composite material is soaked in 10g / L aqueous silver nitrate solution, and after soaking, it is taken out and placed in a blast oven for drying, the temperature is set to 90 °C, t...
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