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Liquid-phase stripping method of two-dimensional molybdenum disulfide nano material, and dispersion method and application of molybdenum disulfide

A technology of molybdenum disulfide and nanomaterials, applied in the direction of molybdenum sulfide, etc., can solve the problems of difficult operation, unstable product quality of molybdenum disulfide two-dimensional nanosheets, and difficulty in large-scale implementation, achieving low cost, easy operation, easy compositing effects

Active Publication Date: 2017-11-21
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned existing methods for preparing two-dimensional molybdenum disulfide nanosheets generally have defects such as difficult operation and large-scale implementation, and the quality of the obtained two-dimensional molybdenum disulfide nanosheets is unstable.

Method used

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  • Liquid-phase stripping method of two-dimensional molybdenum disulfide nano material, and dispersion method and application of molybdenum disulfide
  • Liquid-phase stripping method of two-dimensional molybdenum disulfide nano material, and dispersion method and application of molybdenum disulfide
  • Liquid-phase stripping method of two-dimensional molybdenum disulfide nano material, and dispersion method and application of molybdenum disulfide

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[0049] An aspect of the embodiments of the present invention also provides a method for preparing a molybdenum disulfide dispersion, which includes: uniformly mixing molybdenum disulfide and polyaniline conductive polymers in a dispersion medium to form a stable dispersion.

[0050] Further, the weight ratio of the polyaniline conductive polymer to molybdenum disulfide is preferably 0.1-10:1, especially preferably 0.2-2:1.

[0051] Further, the molybdenum disulfide is preferably a two-dimensional molybdenum disulfide nanomaterial, especially preferably a two-dimensional molybdenum disulfide nanosheet with a thickness of 1-20 nm.

[0052] Further, the dispersion medium includes any one or a combination of two or more of water, organic solvents, and polymer resins, preferably organic solvents, such as the various organic solvents listed above.

[0053] Preferably, the molybdenum disulfide contained in the stable dispersion can be as high as 5 mg / mL, preferably 0.1 mg / mL-3 mg / mL....

Embodiment 1

[0065] Example 1 Synthesis of intrinsic polyaniline and its use in the stripping of molybdenum disulfide two-dimensional nanosheets in organic solvents

[0066] Add 100mL 1M hydrochloric acid and aniline (7g) into a 200mL round bottom flask, stir to dissolve and cool to 0°C. Then 17g of ammonium persulfate was dissolved in 50mL of 1M hydrochloric acid solution and slowly added dropwise into the round bottom flask. After the dropwise addition, reacted for 12 hours, filtered the reaction solution, washed twice with distilled water to obtain dark green doped polyaniline. The obtained dark green polyaniline was soaked in 10wt% ammonia water for 12 hours, filtered, washed with distilled water until the filtrate was neutral, and vacuum-dried at 65° C. for 24 hours to obtain intrinsic polyaniline (5.2 g) for future use. The intrinsic polyaniline has good solubility in strong polar solvents such as DMF and NMP.

[0067] Mix the intrinsic polyaniline prepared in this example, molybden...

Embodiment 2

[0070] Example 2 Synthesis of alkyl-substituted polyaniline and its use in the stripping of molybdenum disulfide two-dimensional nanosheets

[0071] Add 100mL of 1M hydrochloric acid and o-isopropylaniline (6.0g) into a 200mL round bottom flask, stir to dissolve and cool to 0°C. Then 11.44g of ammonium persulfate was dissolved in 50mL of 1M hydrochloric acid solution and slowly added dropwise to the round bottom flask. After the dropwise addition, reacted for 12 hours, filtered the reaction solution, washed twice with distilled water to obtain dark green doped isopropyl Replace polyaniline. The obtained dark green polyaniline was soaked in 10wt% ammonia water for 12 hours, filtered, washed with distilled water until the filtrate was neutral, and vacuum-dried at 65°C for 24 hours to obtain intrinsic isopropyl-substituted polyaniline (4.6 g) for later use. The intrinsic state of isopropyl polyaniline in polar solvents such as THF, CHCl 3 , DMF, NMP, etc. have good solubility. ...

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Abstract

The invention discloses a liquid-phase stripping method of a two-dimensional molybdenum disulfide (MoS2) nano material, and a dispersion method and application of MoS2. The molybdenum disulfide dispersant comprises a polyaniline conductive high polymer which enables molybdenum disulfide to be stably dispersed in a conventional solvent or any other dispersion medium by being combined with molybdenum disulfide under physical actions. The low-cost polyaniline conductive high polymer is used as the molybdenum disulfide dispersant, and the dispersant is simply mixed with the molybdenum disulfide in the dispersion medium, so that a simple liquid-phase stripping method can be utilized to obtain molybdenum disulfide two-dimensional nanosheets under the physical interactions between the dispersing agent and molybdenum disulfide. The liquid-phase stripping method does not damage the physical structure or chemical properties of the molybdenum disulfide, and is simple in the operational process and beneficial to large-scale implementation. The stripped molybdenum disulfide two-dimensional nanosheets have wide application prospects in the fields of semiconductors, energy sources, wear-resistant lubricating paints, composite materials and the like.

Description

technical field [0001] The invention particularly relates to a molybdenum disulfide dispersant, a method for preparing a molybdenum disulfide dispersion and a redispersible molybdenum disulfide powder by a physical method. Background technique [0002] Molybdenum disulfide is a layered semiconductor material, which has broad application prospects in many fields such as lubrication, ion exchange, adsorption, conduction, separation and catalysis. However, the molybdenum disulfide sheets are combined by weak van der Waals force, which is prone to curling and agglomeration under external influences, resulting in limited dispersion in conventional solvents, which largely limits its application. In order to obtain two-dimensional nanomaterials of molybdenum disulfide, many schemes have been proposed in the industry. For example, some researchers have stirred or ultrasonically treated molybdenum disulfide in an organic solvent to form molybdenum disulfide nanosheets. For example,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G39/06
CPCC01G39/06C01P2004/01C01P2004/03
Inventor 赵海超崔明君邱诗惠王立平
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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