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Micro-nano scale wave structure in macroscopic composite material and preparation method thereof

A wave structure, micro-nano-scale technology, applied in nanotechnology, chemical instruments and methods, nano-carbon, etc. for materials and surface science, can solve difficult-to-control, complex preparation process of micro-nano-scale wave structure, and orientation and other issues to achieve the effect of simple operation

Inactive Publication Date: 2018-07-20
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the current problems such as complex preparation process of micro-nano-scale wave structure, orientation, and inability to integrate, the purpose of the present invention is to provide a micro-nano-scale wave structure in a macroscopic composite material and its preparation method. The method is simple and efficient, and can be used in In situ generation of micro-nano-scale wave structures in macroscopic materials assembled from two-dimensional materials provides a solution to the disadvantages of poor elasticity, easy damage, and difficult control in practical applications of macroscopic materials assembled by two-dimensional materials

Method used

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  • Micro-nano scale wave structure in macroscopic composite material and preparation method thereof
  • Micro-nano scale wave structure in macroscopic composite material and preparation method thereof
  • Micro-nano scale wave structure in macroscopic composite material and preparation method thereof

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Embodiment 1

[0038] This embodiment is a composite material with a micro-nano size wave structure formed by assembling two-dimensional transition metal oxide nanosheets. 3 Take nanosheets as an example, the specific steps are as follows:

[0039] 1. Equipped with saturated dicyandiamine aqueous solution (40mg / ml, 80°C insulation); scanning electron microscope photos of molybdenum oxide nanosheets prepared by chemical vapor deposition method are as follows figure 1 (a), the smooth surface can be seen; the molybdenum oxide nanosheets synthesized by chemical vapor deposition (CVD) are ground to make the cross-sectional size smaller, and then ultrasonicated with 80% power for 10-20 minutes to disperse to a concentration of 2 -10mg / ml emulsion;

[0040] 2. Measure 3ml of saturated dicyandiamine aqueous solution according to the mass ratio of 5:4 and inject 30ml of molybdenum oxide emulsion with a concentration of 5mg / ml, oscillate and sonicate for 10-30 minutes to obtain uniformly dispersed molybdenu...

Embodiment 2

[0044] This embodiment is a method for preparing a boron nitride-based composite material with a micro-nano-scale wave structure, which is specifically carried out according to the following steps:

[0045] 1. Configure saturated dicyandiamide aqueous solution (40mg / ml, 80℃ insulation); boron nitride nanosheets such as figure 1 (c) The surface is smooth; the boron nitride powder is dispersed into an emulsion with a concentration of 2-10 mg / ml with 80% power ultrasound for 10-30 minutes;

[0046] 2. Measure 2.25ml of saturated dicyandiamine aqueous solution according to the mass ratio of 5:3 into 30ml of boron nitride emulsion with a concentration of 5mg / ml, shake and sonicate for 10-30 minutes to obtain a relatively uniform nitrogen Boron-dicyandiamine mixture;

[0047] 3. Measure 9ml of the boron nitride-dicyandiamide mixed dispersion and pour it into a 10ml cylindrical ceramic crucible, precool it at -40-0℃ for 2-4 hours to form interconnected ice crystals, and then at -100~ Freez...

Embodiment 3

[0050] This embodiment is a method for preparing graphene-based porous composite foam with micro-nano-scale wave structures with different deformation degrees and different densities. The preparation process and the micro-wave structure change process are as follows figure 2 ; The specific steps are as follows:

[0051] 1. Configure saturated dicyandiamine aqueous solution (40mg / ml, 80℃ insulation), while ultrasonic concentration of 2-8mg / ml neutral graphene oxide solution, ultrasonic 10-120 minutes to obtain few or single layer graphite oxide Ene nanosheet solution;

[0052] 2. According to the mass ratio of 5:1, 5:2, 5:3, 5:4 and 5:8, measure 0.25, 0.5, 0.75, 1 and 2 ml of dicyandiamide solution and inject 10 ml of dicyandiamide solution with a concentration of 5mg / In ml of graphene oxide solution, shake and sonicate for 15-60 minutes to mix well;

[0053] 3. Take out 0.9 ml of the mixed solution of step 2 and pour it into a 1 ml cylindrical ceramic crucible, pre-cool at -40-0°C...

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Abstract

The invention discloses a micro-nano scale wave structure in a macroscopic composite material and a preparation method thereof, and belongs to the technical field of functional composite materials. Atwo-dimensional nano-material dispersion solution is self-assembled to form a macroscopic structure including a thin film, gel and the like; a carbon-nitrogen compound is generated by utilizing thermal chemical reaction and the state of a two-dimensional composite material is regulated and controlled to form the micro-nano scale wave structure. The micro-nano scale wave structure disclosed by theinvention has the characteristics that a preparation technology is simple, the size and shape of the composite material are easy to regulate and control, the mechanical elasticity, an electronic structure or a surface state of the material is adjustable and the like; a foundation is laid for researches and application of an assembled macroscopic material to the fields including flexible conductors, micromechanical electronics and flexible energy storage devices, catalytic carriers and the like.

Description

Technical field: [0001] The invention relates to the technical field of functional composite materials, in particular to a micro-nano-scale wave structure in a macro-composite material and a preparation method thereof, and is suitable for composites composed of two-dimensional materials such as mechanical property changes, electronic valence state adjustment, and surface chemical state modification. Structure preparation. Background technique: [0002] As a typical morphological structure with great deformation, the wave structure, especially the wave structure formed by two-dimensional nanomaterials at the sub-micron scale, can change the flexibility, electronic structure, and surface chemical state of the material, so it is widely s concern. At present, there are methods such as substrate pre-straining method, directional deformation method, and rapid quenching method to prepare micro-nano-scale wave structures. The obtained wave structures usually have single orientation or c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G39/02C01B21/082B82Y30/00B82Y40/00C01B21/064C01B32/184
CPCC01G39/02B82Y30/00B82Y40/00C01B21/0605C01B21/0648C01P2004/03C01P2004/80
Inventor 李峰陈静闻雷陈龙任文才成会明
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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