Plasma continuous modification method for modifying nano or micro particles

A technology of nanoparticles and particles, which is applied in the field of continuous modification and modification of nanoparticles by ion plasma method, can solve the problems of complex processing steps, reaction conditions, harsh environmental requirements, low reaction efficiency, etc. Effect of modified treatment, efficiency and yield improvement

Active Publication Date: 2020-04-14
SICHUAN UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, there are some serious problems in this method of surface chemical modification, such as complex processing steps, low reaction efficiency, limited processing capacity, resulting in low yield; harsh requirements on reaction conditions and environment; various solvent pollution, etc.

Method used

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  • Plasma continuous modification method for modifying nano or micro particles
  • Plasma continuous modification method for modifying nano or micro particles
  • Plasma continuous modification method for modifying nano or micro particles

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Embodiment 1-5

[0039] The present invention takes graphene oxide (GO) nanoparticles as an example, and prepares structured silicon dioxide (SiO2) on its surface through atmospheric pressure sliding arc plasma. 2 ) cladding layer, the specific method is as follows:

[0040] Disperse 100mg of GO and 3mg of TEOS into a mixed solvent of 50ml of water / 50ml of ethanol, and ultrasonicate at low temperature for more than 3 hours to obtain a uniformly mixed GO / TEOS dispersion; The gas flow rate of the atomizer is controlled at 3-4L / min, and the liquid atomization rate is controlled at 5ml / min; the atomizer nozzle is fixed at a certain angle near the plasma nozzle, so that the atomized aerosol coincides with the discharge area, and the reactants pass through the plasma In the bulk discharge area, the residence time is about 30-50 milliseconds, and finally collected by a large beaker (the process diagram and some structures are as follows figure 1 shown); among them, the plasma discharge gas source is...

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Abstract

The invention belongs to the field of nanoparticle surface modification methods; in particular, it relates to a method for continuously modifying and modifying nanoparticle by plasma method. The present invention provides a kind of surface modification method of nanometer or micron particle, described modification method comprises the following steps: 1) mix nanometer or micron particle and modifier with solvent and be prepared into nanometer or micron particle / modifier dispersion 2) forming an aerosol with the nanometer or micron particle / modified substance dispersion liquid obtained in step 1), so that the nanoparticle or micron particle and the modified substance are uniformly dispersed in the aerosol; 3) placing the aerosol in the aerosol In the ion generator, the working gas is introduced, and then the discharge treatment is performed to generate modified nano or micro particles in situ. The method uses plasma technology to uniformly, efficiently and continuously modify nanometer or microparticles, prepare nanocomposite materials or change their surface energy, and greatly improves the efficiency and yield of nanometer or microparticle modification.

Description

technical field [0001] The invention belongs to the field of nanoparticle surface modification methods; in particular, it relates to a method for continuously modifying and modifying nanoparticle by plasma method. Background technique [0002] Various nanoparticles are widely used in various fields because of their excellent optical, electrical, thermal, magnetic, biological or nano effects. Or it can be used as a filler in composite materials to achieve its functionalization, or it can be directly used as a main material in various fields such as energy, biological applications, and the environment. However, in the actual application process, nanoparticles often need to be modified or modified to adapt to the relevant application system to show better performance and effect. [0003] The fine particle size, large specific surface area, insufficient atomic coordination and high surface energy of nanoparticles make these atoms highly active, extremely unstable and easy to ag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/194C01B33/18
CPCC01B33/18C01P2002/72C01P2002/82C01P2004/03C01P2004/61C01P2004/62
Inventor 尹波杨屹程旺杨鸣波
Owner SICHUAN UNIV
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