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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

Inactive Publication Date: 2017-04-26
QINGYANG COUNTY YONGCHENG CALCIUM IND
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AI Technical Summary

Problems solved by technology

"Research on Ground Calcium Carbonate Powder Modified by Stearic Acid-Titanate Coupling Agent" uses stearic acid and titanate coupling agent as composite modifier, absolute ethanol as dispersant, and adopts wet ball milling The powder is modified to achieve a relatively ideal modification effect, but the product prepared by this method is a hydrophobic product, which is limited in the application of water-based ink and water-based paint, and the additional functions are insufficient, which is limited to reinforcement For toughening, further modification is required to broaden its scope of use

Method used

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Embodiment Construction

[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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Abstract

The invention discloses graphene-grafted modified calcium carbonate powder. According to the graphene-grafted modified calcium carbonate powder, calcium carbonate is subjected to wet ball milling pretreatment through a titanate coupling agent / ethanol solution at first, the dispersity of the calcium carbonate is improved, and the surface reaction activity is improved; then, a graphene-polyethyleneimine thin film is grafted on the surface of the calcium carbonate, and the advantages of graphene are introduced; and meanwhile, the powder has amphipathy and has a good suspension dispersion effect in a water system and an oil system, so that the filling modification effect of the calcium carbonate powder is effectively improved, and a product with better performance is obtained.

Description

technical field [0001] The invention relates to the technical field of inorganic powder surface modification, in particular to a modified calcium carbonate powder grafted with graphene and a preparation method thereof. Background technique [0002] Calcium carbonate is a very common inorganic powder filler. It has the advantages of low price, non-toxic and tasteless, high whiteness and good hardness. It is widely used in rubber products, papermaking, ink, plastics, coatings and other fields. However, , calcium carbonate is essentially an inorganic mineral, which has poor affinity and compatibility with organic substances. Direct filling will lead to serious deterioration of product performance and severely limited scope of use. Therefore, calcium carbonate powder needs to be adjusted in practical applications. Modified treatment. [0003] At present, the main modification methods include mechanical refinement, surface modifiers such as coupling agents, fatty acids and their...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/02C09C3/06C09C3/08C09C3/10
CPCC09C1/021C01P2004/62C01P2006/19C01P2006/22C09C3/006C09C3/063C09C3/08C09C3/10
Inventor 陈永忠
Owner QINGYANG COUNTY YONGCHENG CALCIUM IND
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