Honeycomb-shaped carbon nano tube porous microsphere, and preparation method and application thereof

A technology of carbon nanotubes and porous microspheres, which is applied in the field of honeycomb carbon nanotube porous microspheres and its preparation, can solve the problems of easy folding and poor dispersion of carbon nanotubes, and achieve easy industrialized mass production, precise operation control, The effect of large specific surface area

Active Publication Date: 2019-09-17
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to its poor dispersibility in water and the fact that carbon nanotubes are easily folded during the drying process, there are many limitations in its application.

Method used

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  • Honeycomb-shaped carbon nano tube porous microsphere, and preparation method and application thereof
  • Honeycomb-shaped carbon nano tube porous microsphere, and preparation method and application thereof
  • Honeycomb-shaped carbon nano tube porous microsphere, and preparation method and application thereof

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preparation example Construction

[0055] In step 1) of the preparation method according to the present invention, a certain amount of carboxylated carbon nanotubes is first added to the nano-template particle dispersion with a mass fraction of 6w / v% to 15w / v%, and the ultrasonic treatment is configured to 1 mg / v mL to 20mg / mL carbon nanotube dispersion, in this process, carbon nanotubes and nano template particles are fully mixed.

[0056] Preferably, in step 1), the nano-template particles can be selected from SiO 2 , polystyrene beads, ZnO and Au metal nanoparticles, nanosheets and at least one of nanorods.

[0057] The nanotube in the present invention is a one-dimensional nanomaterial with light weight, perfect connection of hexagonal structure, and many abnormal mechanical, electrical and chemical properties. The carbon nanotubes mainly consist of carbon atoms arranged in a hexagon to form a coaxial circular tube with several to tens of layers. A fixed distance is maintained between the layers, about 0....

Embodiment 1

[0082] Example 1: Preparation of carbon nanotube porous microspheres with compact surface

[0083] (1) Add a certain amount of carboxylated carbon nanotubes to the 2 In the dispersion of nanoparticles (with a particle size of 200nm), ultrasonic treatment was used to configure a 7.5 mg / mL carbon nanotube dispersion as the water phase, and hexadecane containing 30 wt% of the surfactant Span 80 as the oil phase.

[0084] (2) The above-mentioned two-phase fluid is introduced into a polydimethylsiloxane (PDMS) flow-focused microfluidic chip through a fluid pump to prepare monodisperse droplets. Since the droplets are wrapped with a certain concentration of SiO 2 nanoparticles and carbon nanotubes, due to SiO 2 The electrostatic repulsion between nanoparticles and the reduction of droplet surface free energy make SiO 2 Nanoparticles and carbon nanotubes are closely arranged on the surface of the micron droplet, the flow rate ratio of the dispersion liquid and the oil phase is 1:5,...

Embodiment 2

[0089] This embodiment is basically the same as Embodiment 1, except that: in this embodiment, a PDMS chip is used as a microfluidic chip. image 3 It is a schematic diagram of the droplet generated by the glass chip in this embodiment.

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Abstract

The invention discloses a honeycomb-shaped carbon nano tube porous microsphere, and a preparation method and application thereof. The honeycomb-shaped carbon nano tube porous microsphere is a three-dimensional porous structure formed by carbon nano tubes, has a diameter in a range of 5-200 microns, and contains a large amount of micropores with diameters in a range of of 20-1000 nm. A droplet micro-fluidic technology is adopted, and a porous microsphere structure is constructed by using micro droplets as soft templates and using SiO2 nano particle as hard templates. The honeycomb-shaped carbon nanotube porous microspheres prepared by the method are uniform in size, and the size, shape and density of ''honeycombs'' are controllable. Meanwhile, the preparation method disclosed by the invention is simple, and preparation is flexible and convenient. The flow speed is controlled through an injection pump, so that the advantages of accurate operation control, easy industrial batch production and the like are achieved.

Description

technical field [0001] The invention belongs to the field of material preparation, in particular, relates to a honeycomb carbon nanotube porous microsphere and its preparation method and application, wherein the preparation method of the honeycomb carbon nanotube porous microsphere adopts droplet microfluidic technology , using microdroplets as soft templates along with SiO 2 Nanoparticles are used as a hard template method to construct porous microsphere structures. Background technique [0002] Microfluidics refers to the manipulation of 10 -9 to 10 -18 Fluid of L system. Droplet-based microfluidic technology is an interdisciplinary field that combines fluid materials, biochemistry, and microsystem engineering. Droplet microfluidic chips can generate monodisperse droplets with high throughput and manipulate these micro-nanoscale droplets. . At present, the application direction of droplet microfluidics technology can be classified into five categories: synthesis of mi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/14B01J20/20B01J20/30C02F1/28G01N27/30
CPCB01J13/14B01J20/20C02F1/281C02F1/283G01N27/308
Inventor 水玲玲姚纪源刘振平金名亮
Owner SOUTH CHINA NORMAL UNIVERSITY
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