Composite fireboard with electromagnetic shielding function and preparation method thereof
A composite fiber and electromagnetic shielding technology, which is applied in the field of composite fiberboard preparation, can solve the problems of low electromagnetic shielding efficiency in low frequency bands, and achieve the effect of solving poor fire resistance, light weight and good natural properties.
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Embodiment 1
[0039] 1. Preparation of expanded graphite: First weigh 30.0g of expanded graphite and put it in a 2L round bottom flask, add 40ml of nitric acid with a mass fraction of 65%, 80ml of phosphoric acid with a mass fraction of 85%, and 6g of potassium permanganate, using a stirring paddle Stir at room temperature for 60 minutes, filter and dry to obtain acidified graphite. Weigh the quality of acidified graphite after drying to be 50g, put it into a 2L round bottom flask, add 250ml of acetic acid with a mass fraction of 99.5%, 75ml of nitric acid and 7.5g of potassium permanganate with a mass fraction of 65%, and use a stirring blade to Stir for 60 minutes, filter and dry to obtain acidified graphite. Finally, put the acidified graphite oxide into a microwave oven and heat it with a power of 700w for 1 minute to obtain expanded graphite.
[0040]2. Preparation of nickel-zinc ferrite expanded graphite: first weigh 10g of nickel nitrate hexahydrate, 40.91g of zinc nitrate hexahydra...
Embodiment 2
[0044] 1. Preparation of expanded graphite: First weigh 30.0g of expanded graphite and put it in a 2L round bottom flask, add 40ml of nitric acid with a mass fraction of 60%, 80ml of phosphoric acid with a mass fraction of 85%, and 6g of potassium permanganate, and use a stirring paddle at 20 Stir at room temperature for 60 minutes, filter and dry to obtain acidified graphite. Weigh the quality of the acidified graphite after drying to be 50g, put it into a 2L round bottom flask, add 250ml of acetic acid with a mass fraction of 99.5%, 75ml of nitric acid with a mass fraction of 65%, and 7.5g of potassium permanganate. Stir for 60 minutes, filter and dry to obtain acidified graphite. Finally, put the acidified graphite oxide into a microwave oven and heat it with a power of 650w on a high fire for 1 minute to obtain expanded graphite.
[0045] 2. Preparation of nickel-zinc ferrite expanded graphite: first weigh 10g of nickel nitrate hexahydrate, 15.36g of zinc nitrate hexahydr...
Embodiment 3
[0049] 1. Preparation of expanded graphite: First weigh 30.0g of expanded graphite and put it in a 2L round bottom flask, add 40ml of nitric acid with a mass fraction of 65%, 80ml of phosphoric acid with a mass fraction of 85%, and 6g of potassium permanganate, and use a stirring paddle at 25 Stir at room temperature for 60 minutes, filter and dry to obtain acidified graphite. Weigh the quality of acidified graphite after drying to be 50g, put it into a 2L round bottom flask, add 250ml of acetic acid with a mass fraction of 99.5%, 75ml of nitric acid with a mass fraction of 65%, and 7.5g of potassium permanganate. Stir for 60 minutes, filter and dry to obtain acidified graphite. Finally, put the acidified graphite oxide into a microwave oven and heat it with a power of 700w for 1 minute to obtain expanded graphite.
[0050] 2. Preparation of nickel-zinc ferrite expanded graphite: first weigh 10g of nickel nitrate hexahydrate, 6.8g of zinc nitrate hexahydrate, 46.19g of iron n...
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