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Organic modified molybdenum disulfide nanosheet layer and preparation method thereof

A technology of molybdenum disulfide and nanosheets, which is applied in the field of molybdenum disulfide nanosheets and nanomaterials, can solve the problems of limiting the development of polymer nanocomposites, the performance of composite materials is not obvious, and the dispersion is poor. Large, low cost, not easy to reunite effect

Active Publication Date: 2013-09-04
UNIV OF SCI & TECH OF CHINA
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  • Abstract
  • Description
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Problems solved by technology

The commonly used methods for preparing molybdenum disulfide polymer nanocomposites are mainly divided into two types: one is to directly mix layered molybdenum disulfide with polymer to obtain molybdenum disulfide polymer composites, but due to the molybdenum disulfide in the polymer The dispersibility of the composite material is very poor, so the performance of the composite material prepared by this method is not obvious; the other is to use layered molybdenum disulfide to prepare intercalated molybdenum disulfide, and then react with the polymer to prepare molybdenum disulfide polymer nanoparticles. However, the intercalated molybdenum disulfide is a hydrophilic compound, which is prone to severe agglomeration when dispersed in an organic solvent, so that it can only react with water-soluble polymers to prepare polymer disulfide nanocomposites, which limits the use of Development of polymer nanocomposites prepared from molybdenum disulfide

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  • Organic modified molybdenum disulfide nanosheet layer and preparation method thereof
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  • Organic modified molybdenum disulfide nanosheet layer and preparation method thereof

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preparation example Construction

[0035] The invention provides a method for preparing organically modified molybdenum disulfide nanosheets, comprising the following steps:

[0036] Step 1: intercalate the layered molybdenum disulfide with an intercalation agent by a solvothermal method, centrifuge, wash and dry to obtain the intercalated molybdenum disulfide. The present invention has no special limitation on the intercalation treatment process, and methods well-known to those skilled in the art can be used, preferably as follows: adding layered molybdenum disulfide and intercalation agent into an organic solvent, at 25-100°C After reacting for 2-6 hours, the obtained product is centrifuged, washed and dried to obtain intercalated molybdenum disulfide.

[0037] Those skilled in the art can easily know that the ratio of layered molybdenum disulfide and intercalation agent can be selected according to actual conditions, and the type of organic solvent can be selected according to the type of intercalation agent...

Embodiment 1

[0045] (1) Mix 0.003 mol layered molybdenum disulfide with 36 ml 0.5 mol / L n-butyllithium n-hexane solution and put them in a 50 ml reaction kettle, react at 80°C for 4 hours, centrifuge and wash the obtained product and drying to obtain intercalated molybdenum disulfide;

[0046] (2) Add 0.1 g of intercalated molybdenum disulfide to 100 ml of deionized water for ultrasonic hydrolysis to obtain molybdenum disulfide suspension;

[0047] (3) Add 0.5 g of cetyltrimethylammonium bromide to the molybdenum disulfide suspension obtained in step (2), react at 80°C for 8 hours, centrifuge, wash and dry the obtained product to obtain Organically modified molybdenum disulfide nanosheets T1.

[0048] Such as figure 2 As shown, the X-ray diffraction test results of T1 show that the interlayer spacing increases from 0.62 nanometers of the raw material molybdenum disulfide to 1.84 nanometers, and the interlayer spacing increases significantly. Such as image 3 As shown, the results of F...

Embodiment 2

[0050] (1) Mix 0.006 moles of layered molybdenum disulfide with 36 milliliters of 0.5 moles / liter n-butyllithium n-hexane solution, put them in a 50 milliliter reaction kettle, react at 80°C for 6 hours, centrifuge and wash the obtained product and drying to obtain intercalated molybdenum disulfide;

[0051] (2) Same as step (2) of embodiment 1;

[0052] (3) Add 0.6 g of sodium dodecylsulfonate to the molybdenum disulfide suspension obtained in step (2), react at 60°C for 6 hours, centrifuge, wash and dry the obtained product to obtain organically modified Molybdenum disulfide nanosheets T2.

[0053] Such as Figure 4 As shown, the X-ray diffraction test results of T2 show that the interlayer spacing increases from 0.62 nanometers of the raw material molybdenum disulfide to 1.57 nanometers, and the interlayer spacing increases significantly. Such as Figure 5 As shown, the results of Fourier transform infrared spectroscopy of T2 show that T2 has obvious sulfate and carbon-...

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Abstract

The invention discloses a preparation method of an organic modified molybdenum disulfide nanosheet layer. The preparation method comprises the following steps of: carrying out intercalation treatment on layered molybdenum disulfide by using an intercalator through a solvothermal method, centrifuging, washing and drying to obtain the intercalated molybdenum disulfide; hydrolyzing the intercalated molybdenum disulfide to obtain molybdenum disulfide suspension liquid, adding an organic modifying agent to the molybdenum disulfide suspension liquid, reacting for 3-10 hours at 25-90 DEG C, centrifuging, washing and drying an obtained product to obtain the organic modified molybdenum disulfide nanosheet layer. The preparation method of the organic modified molybdenum disulfide nanosheet layer is simple and low in cost; the interlayer spacing of the prepared organic modified molybdenum disulfide nanosheet layer is large; and the organic modified molybdenum disulfide nanosheet layer can be better dispersed in an organic solvent, is not easy to agglomerate and has wide application prospect.

Description

technical field [0001] The invention relates to the field of nanometer materials, in particular to the field of molybdenum disulfide nanosheets. Background technique [0002] Polymer nanocomposites composed of polymers and inorganic substances are the most active nanocomposites in recent years. This kind of polymer nanocomposites can not only significantly improve the comprehensive properties of materials, but also obtain many unexpected new physical and chemical properties. performance, thus showing great potential for development in the field of new material applications. There are many preparation methods of polymer nanocomposites, among which the intercalation composite method is the most researched in the world, and has the most use value and development prospect. This method is mainly to insert monomers into the interlayers of layered inorganic compounds for in-situ polymerization, or to directly insert polymer segments into the interlayers by melting or solution blen...

Claims

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Application Information

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IPC IPC(8): C08K9/04C08K9/02C08K3/30C08L25/06
Inventor 胡源周克清桂宙
Owner UNIV OF SCI & TECH OF CHINA
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