Graphene-based conductive pearlescent pigment and preparation method thereof
A pearlescent pigment, alkenyl bead technology, applied in conductive materials dispersed in non-conductive inorganic materials, inorganic pigment processing, chemical instruments and methods, etc. and other problems, to achieve the effect of easy mass production, simple process and low cost
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Embodiment 1
[0067] Add 500mL of concentrated sulfuric acid, 10g of sodium nitrate, 60g of potassium permanganate and 10g of graphite to the reactor in sequence, stir at room temperature for 5 days, add 100mL of 80°C hot water into the reactor at a constant speed, and after the heat release is complete, centrifuge and wash until The solution was neutral, and was diluted to 1000 mL to obtain a graphite oxide aqueous solution with a concentration of 10 mg / mL, pH=6. Prepare the mica powder into a 10% suspended aqueous solution, adjust the pH to 2.0 with concentrated hydrochloric acid, heat and stir at 80°C, 2mol / L TiCl 4 The aqueous solution was added dropwise to the suspension, and NaOH solution was added dropwise at the same time to stabilize the pH value at 2. After the dropwise addition was completed, heating and stirring was continued for 2 hours, and the mica titanium pearlescent material was obtained by suction filtration and washing. Disperse the prepared mica titanium pearlescent mat...
Embodiment 2
[0069] Add 500mL of concentrated sulfuric acid, 10g of sodium nitrate, 60g of potassium permanganate and 10g of graphite to the reactor in sequence, stir at room temperature for 5 days, add 100mL of 80°C hot water into the reactor at a constant speed, and after the heat release is complete, centrifuge and wash until The solution was neutral, and was diluted to 1000 mL to obtain a graphite oxide aqueous solution with a concentration of 10 mg / mL, pH=5. Prepare the mica powder into a 10% suspended aqueous solution, adjust the pH to 2.0 with concentrated hydrochloric acid, heat and stir at 80°C, 2mol / L TiCl 4 The aqueous solution was added dropwise to the suspension, and NaOH solution was added dropwise at the same time to stabilize the pH value at 1.5. After the dropwise addition was completed, heating and stirring was continued for 2 hours, and the mica titanium pearlescent material was obtained by suction filtration and washing. Disperse the prepared mica titanium pearlescent m...
Embodiment 3
[0071] The graphene / mica-titanium composite was prepared in the same manner as in Example 1, except that the calcination in the Ar atmosphere was changed to 2% hydrazine hydrate solution at 180° C. for 24 hours. When the resistance of this composite material is tested with a powder resistivity meter, 100kg·cm -2 The resistivity under pressure is 2.75×10 4 Ω·cm, the composite material is a conductive material.
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