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Method for preparing graphene-based conductive pearlescent pigment

A pearlescent pigment, graphene-based technology, applied in the wet preparation of dyeing pigments, inorganic pigment processing, chemical instruments and methods, etc. The effect of simplicity and low reaction temperature

Active Publication Date: 2016-08-10
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] Facing the problems existing in the prior art, the purpose of the present invention is to provide a graphene-based conductive material with little influence on the original optical properties of the pearlescent pigment, good electrical conductivity of the composite pigment, simple operation, no pollution, low energy consumption, and high efficiency. The preparation method of pearlescent pigments solves the problems of increased absorbance, high reaction temperature, long time, heavy pollution and high equipment requirements for the preparation of graphene-based conductive pearlescent pigments in the prior art, and achieves the same graphene doping amount and pearlescent pigments. Under the condition of unchanged optical properties, the conductive performance of the composite pigment is significantly improved

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  • Method for preparing graphene-based conductive pearlescent pigment
  • Method for preparing graphene-based conductive pearlescent pigment
  • Method for preparing graphene-based conductive pearlescent pigment

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preparation example Construction

[0061] The preparation method of the invention has the advantages of simple process, environmental protection, small side effects, strong controllability, good repeatability, low cost, excellent product performance and easy implementation of large-scale production.

[0062] In the present invention, the metal reduction method is used for the first time in the preparation of graphene-based conductive pearlescent pigments, and the purpose of significantly improving the electrical conductivity of the composite pigments is achieved under the premise of the same graphene doping amount and optical properties of the pearlescent pigments. The method of the present invention has the characteristics of simple operation, environmental protection, high efficiency and low cost, and the prepared conductive composite material has outstanding advantages such as adjustable color, high conductivity, high stability, etc., and is widely used for conductive pearlescent pigments and conductive interf...

Embodiment 1

[0065] Add 500mL of concentrated sulfuric acid, 10g of sodium nitrate, 60g of potassium permanganate and 10g of graphite to the reactor in turn, stir at room temperature for 5 days, add 100mL of 80°C hot water dropwise into the reactor at a constant speed, and centrifuge and wash after the heat release is complete. Until the solution is neutral, dilute to 1000mL to obtain a graphene oxide aqueous solution with a concentration of 10mg / 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 pigment was obtained by suction filtration and washing. Disperse the prepared mica titanium pearlescent pigment at ...

Embodiment 2

[0067] Add 500mL of concentrated sulfuric acid, 10g of sodium nitrate, 60g of potassium permanganate and 10g of graphite to the reactor in turn, stir at room temperature for 5 days, add 100mL of 80°C hot water dropwise into the reactor at a constant speed, and centrifuge and wash after the heat release is complete. Until the solution is neutral, dilute to 1000mL to obtain a graphene oxide aqueous solution with a concentration of 10mg / 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 pigment was obtained by suction filtration and washing. Ultrasonic disperse 10 g of the obtained powder in an aqu...

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Abstract

The invention relates to a method for preparing graphene-based conductive pearlescent pigment .The method comprises the steps of mixing oxidized graphene solution with pearlescent pigment dispersion liquid, and heating and stirring the mixed solution for one hour to one week at 20-100 DEG C to obtain oxidized graphene-based pearlescent pigment; preparing oxidized graphene-based pearlescent pigment dispersion liquid, adding a metallic reducing agent, conducting uniform mixing, and then conducting heating and stirring for 10 seconds to 24 hours at 10-100 DEG C, so that the graphene-based conductive pearlescent pigment is obtained .The method is convenient to operate, high in efficiency, environmentally friendly, free of pollution, low in cost and capable of achieving large-scale production.

Description

technical field [0001] The invention relates to a preparation method of a graphene-based conductive pearlescent pigment, belonging to the technical field of pearlescent pigments and new functional materials. Background technique [0002] Graphene-based conductive pearlescent pigment is a new functional composite pearlescent pigment. On the basis of the existing pearlescent pigments, this kind of composite pigment introduces highly transparent and highly conductive graphene materials, thereby endowing the pearlescent pigments with certain conductive functions while maintaining the rich colors of the original pearlescent pigments, which can be used for coatings, Various industrial sectors such as plastics, textiles, and ceramics, as well as conductive and antistatic fields in people's daily life (refer to Document 1). [0003] The synthesis method of this kind of composite pigment is mainly divided into two steps: (1) select graphene oxide prepared by Hummers method to compou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/40C09C3/06
CPCC01P2006/40C09C1/0015C09C3/06C09C2200/102C09C2220/10
Inventor 王焱孙静刘阳桥
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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