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Polymer porous microsphere, carbon sphere and ultra-black material prepared from the same, and applications

A technology of porous microspheres and polymers, applied in the fields of biochemical equipment and methods, applications, alkali metal compounds, etc., can solve the problems of difficult to achieve large-scale preparation and wide-ranging applications.

Active Publication Date: 2019-01-29
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current ultra-black materials are mainly concentrated in carbon nanotubes, graphene, and aerogels. These materials have applied harsh chemical vapor deposition, etching, or supercritical drying technologies in the preparation process, and it is difficult to achieve mass production. Preparation and Wide Range of Applications

Method used

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  • Polymer porous microsphere, carbon sphere and ultra-black material prepared from the same, and applications
  • Polymer porous microsphere, carbon sphere and ultra-black material prepared from the same, and applications
  • Polymer porous microsphere, carbon sphere and ultra-black material prepared from the same, and applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0104] Take 0.3-3.0g polyvinylidene chloride (PVDC) and dissolve it in 10g DMF at 80-100°C. Preheat 40-100mL of 2.0g Span 85 and 1.0g Tween liquid paraffin to 85°C and add it to the above PVDC solution, keep it at a stirring rate of 500-1500rpm for 30 minutes, then apply an ice bath to quickly cool down, and continue stirring After 10-20 minutes, 20-50 mL of isopropanol was added dropwise thereto (within 10 minutes to 1 hour). After continuing to stir for 1 hour, pour the above emulsion into a large amount of ethanol and petroleum ether mixed solution (volume ratio 1:1), filter after stirring and standing still, wash twice with ethanol petroleum ether mixed solution, wash twice with ethanol, and dry naturally to obtain PVDC polymer porous microspheres.

[0105] figure 1 It is the electron micrograph of the PVDC polymer porous microsphere of embodiment 1; figure 1 As shown, the porosity of the microsphere is 48-94%, the particle size is 2-10 microns, the basic unit is PVDC p...

Embodiment 2

[0107] After the PVDC polymer porous microspheres of Example 1 are poured into a mixed solution of ethanol and petroleum ether, the polymer slurry is obtained by washing and filtering under normal pressure, and added to 50-80mL of KOH in ethylene glycol solution (concentration is 0.2-2mol / L), reflux at 180°C for 4 hours, filter with suction, wash with water and ethanol three times respectively, and dry naturally. The obtained dechlorinated pellets were heated to 1000° C. in a tube furnace and kept for 1 hour (the heating rate was 2° C. / min) to obtain carbon pellets. It looks like figure 2 As shown, it can be seen that compared with the PVDC polymer porous microspheres of Example 1, the morphology of the carbon spheres prepared in Example 2 is well maintained. The nitrogen adsorption curve and pore distribution curve of the obtained carbon spheres are as follows: image 3 As shown, it can be seen that carbon spheres have a relatively rich pore structure. For carbon spheres...

Embodiment 3

[0110] Since the composition of the carbon spheres in Example 2 is extremely high defect graphitic carbon (XRD characterization and Raman characterization as Figure 4 Shown), and the density is low, so it is a good light-absorbing material. Disperse 0.2-0.5g of the carbon spheres obtained in Example 2 in 1-10mL of isopropanol, add 1-5% of PVP as a thickener and binder, and use the method of solution spraying to deposit on the PMMA substrate. When the coating thickness is 80 microns, such as Figure 5 As shown, the carbon spheres can absorb more than 99% of the incident light in the ultraviolet-visible and infrared regions.

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Abstract

The invention discloses a polymer porous microsphere, and a preparation method and applications thereof. A carbon sphere, and a preparation method and applications thereof are also disclosed. The carbon sphere is prepared from the polymer porous microsphere. An ultra-black material composition, and a ultra-black material prepared from the same and applications are disclosed as well. The ultra-black material composition includes the carbon sphere. As a linear polymer containing groups like halogen and hydroxy and having no heteroatom on a main chain has high degree of crystallinity and abundantcrystal types, the morphology of the obtained microsphere is also special, and a composition structure can include a sheet structure, a bicontinuous structure and a fibrous structure. The morphologyof the polymer porous microsphere can maintain unchanged through carbonization, so that the prepared carbon sphere can well maintain the morphology structure and porosity of the polymer porous microsphere; and a graphite structure with multiple defects can be formed during carbonization, so that the pore canal structure can be more abundant, and especially, the volumes of micropores can be greatlyenhanced.

Description

technical field [0001] The invention relates to a polymer porous microsphere, a carbon sphere prepared therefrom, an ultra-black material and its application in the fields of optics, electricity and the like, and belongs to the technical field of the microsphere and its preparation. Background technique [0002] Porous materials are widely used and have great application prospects in the fields of adsorption, separation, catalysis, sensing, energy and optics. Micron-sized spherical porous materials have a greater demand in practical applications because they are more convenient to use. At present, phase separation is the main method for the preparation of porous polymer materials, including non-solvent-induced phase separation, water vapor-induced phase separation, thermally induced phase separation, etc. However, these methods generally can only obtain thin films or bulk materials, and cannot obtain polymer porous spheres with a size of micron or nanometer. Recently, some...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/28B01J20/26B01J20/28B01D53/02C04B35/524C04B38/06C04B35/64C12N5/00C08L27/08C08L27/16C08L71/02
CPCB01D53/02B01J20/261B01J20/267B01J20/28021C04B35/524C04B35/64C04B38/06C04B2235/6562C04B2235/661C08J9/28C08J2201/0522C08J2327/08C08J2327/16C08J2371/02C12N5/0062C12N2513/00C12N2533/30C04B38/0074
Inventor 徐坚郭靖赵宁
Owner INST OF CHEM CHINESE ACAD OF SCI
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