Graphene oxide-high-entropy alloy nano composite material for electromagnetic wave shielding as well as preparation method and application of graphene oxide-high-entropy alloy nano composite material
A nano-composite material and high-entropy alloy technology, which is applied in the field of graphene oxide-high-entropy alloy nano-composite materials and their preparation, can solve the problems of easy oxidation of metal elements, unstable performance of wave absorbing materials, etc., and achieves environmental protection in the preparation process. Increased shielding effect, good antioxidant effect
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Embodiment 1
[0058] The present embodiment provides a kind of graphene oxide, specifically, this graphene oxide is porous graphene oxide; The preparation method of this graphene oxide comprises the following steps:
[0059] The waste organic polymer membrane charcoal is crushed with a pulverizer, and sieved with a 300-mesh stainless steel mesh sieve to obtain the powder of the waste organic polymer membrane carbon; 2g of the waste organic polymer membrane charcoal powder and 2g of acetic acid are weighed respectively Potassium was poured into a mortar and ground for 30 minutes to obtain a mixture. The mixture was transferred to a tube furnace for grapheneization under the condition of nitrogen gas, the temperature was raised from room temperature to 600°C at a rate of 3°C / min, kept for 3 hours, and then heated to 900°C at a rate of 1°C / min, and kept 5h, naturally cool to room temperature; take out the reactant, pickle the reactant with 0.1mol / L dilute hydrochloric acid to make the pH sligh...
Embodiment 2
[0063] The present embodiment provides a graphene oxide-high entropy alloy nanocomposite (CuCoNiFeZn) for electromagnetic wave shielding, the preparation method of the graphene oxide-high entropy alloy nanocomposite comprises the following steps:
[0064] (1) Preparation of graphene oxide
[0065] The waste organic polymer membrane charcoal is crushed with a pulverizer, and sieved with a 300-mesh stainless steel mesh sieve to obtain the powder of the waste organic polymer membrane carbon; 2g of the waste organic polymer membrane charcoal powder and 6g of carbonic acid Potassium was poured into a mortar and ground for 30 minutes to obtain a mixture; the mixture was transferred to a tube furnace for grapheneization under the condition of nitrogen gas. Heat at 500°C for 1 hour, then raise the temperature to 1100°C at a rate of 3°C / min, hold for 1 hour, and cool to room temperature naturally. Take out the reactant, pickle the reaction product with 1mol / L dilute hydrochloric acid,...
Embodiment 3
[0070] The present embodiment provides a graphene oxide-high entropy alloy nanocomposite (CuCoNiFeZn) for electromagnetic wave shielding, the preparation method of the graphene oxide-high entropy alloy nanocomposite comprises the following steps:
[0071] (1) Preparation of graphene oxide
[0072] The waste organic polymer film charcoal is crushed with a pulverizer, and sieved with a 300-mesh stainless steel mesh sieve to obtain the powder of the waste organic polymer film material charcoal. Weigh 2g of waste organic polymer film carbon powder, 5g of potassium carbonate and 5g of potassium acetate respectively, pour them into a mortar, and grind for 30min to obtain a mixture. The mixture was transferred to a tube furnace for grapheneization under the condition of nitrogen gas; the specific treatment process of grapheneization was as follows: from room temperature to 800°C at a rate of 3°C / min, holding for 2 hours, and then at 5°C / min Raise the temperature to 1200°C at a speed...
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