Graphene-grafted modified calcium carbonate powder and preparation method thereof
A technology of calcium carbonate powder and grafted graphite, applied in chemical instruments and methods, inorganic pigment treatment, dyeing low-molecular organic compound treatment, etc., can solve problems such as insufficient additional functions, achieve good suspension dispersion effect, and improve surface reactivity , Improve the effect of filling modification effect
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[0011] A modified calcium carbonate powder grafted with graphene, the modified calcium carbonate powder is made of the following raw materials in parts by weight: calcium carbonate 50, titanate coupling agent 2, absolute ethanol 50, graphene oxide 0.4, hydrazine hydrate 8, polyethyleneimine 1, deionized water 60.
[0012] The preparation method of this embodiment powder comprises the following steps:
[0013] (1) Put the titanate coupling agent and calcium carbonate together into absolute ethanol, ball mill for 40 minutes, then dry with hot air to completely remove the solvent, and obtain pre-modified calcium carbonate powder after grinding and dispersing;
[0014] (2) Put graphene oxide and polyethyleneimine into deionized water together, stir until they are completely dissolved and dispersed, then put into pre-modified calcium carbonate powder, stir and mix by ultrasonic for 40min, then heat the system to 60°C, then add hydration Hydrazine, continue to stir and react for 3 ...
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