3D printing formation method for mesoporous/macroporous carbon material with controllable pore structure

A pore structure and macroporous carbon technology, applied in the field of 3D printing, can solve the problems of high cost and complex process, and achieve the effect of low cost, simple process, easy small-scale laboratory research and large-scale industrial production.

Inactive Publication Date: 2018-04-17
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, there are relatively few technologies and researches related to 3D printing of carbon materials, mainly focusing on special carbon materials such as graphene, carbon nanotubes, and carbon aerogels. The cost is high and it is difficult to meet the needs of industrial applications.
At the same time, a printing method is usually only suitable for a specific carbon material with a certain structure, and the process is usually complicated

Method used

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  • 3D printing formation method for mesoporous/macroporous carbon material with controllable pore structure
  • 3D printing formation method for mesoporous/macroporous carbon material with controllable pore structure
  • 3D printing formation method for mesoporous/macroporous carbon material with controllable pore structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Add 1.5g of mesoporous molecular sieve SBA-15 powder into 7.5mL of distilled water, ultrasonically disperse for 30 minutes to make a suspension, add 3g of starch and 0.9g of gelatin into the suspension, and keep stirring at 90°C for more than 30 minutes. It is fully gelatinized, and then the resulting sol is loaded into a 3D printer for printing. The obtained material was freeze-dried and then carbonized at 900°C under Ar atmosphere. The carbonized material is washed with 2mol / L NaOH solution, and then the excess lye is removed with 2mol / L dilute nitric acid solution, and the printed carbon material structure can be obtained after drying.

[0038] The electron micrographs of the obtained carbon materials are as follows: image 3 b and image 3 as shown in c. It can be seen that the interior of the material is composed of a uniform and ordered decomposed pore structure. The microstructure of the material channel and the structure of the SBA-15 template ( image 3 As...

Embodiment 2

[0040] Add 1.5g of monodisperse silica microspheres with an average diameter of 50nm into 7.5mL of distilled water, and ultrasonically disperse for 30 minutes to make a suspension. Add 3g of starch and 0.9g of gelatin to the suspension, and keep stirring at 90°C More than 30 minutes to make it fully gelatinized, and then put the obtained sol into the 3D printer for printing process. After the obtained material was freeze-dried, in N 2 Carbonization at 1100°C under atmosphere. The carbonized material is washed with 2mol / L NaOH solution, and then the excess lye is removed with 2mol / L dilute nitric acid solution, and the printed carbon material structure can be obtained after drying.

[0041] The electron micrographs of the obtained carbon materials are as follows: Figure 4 a and Figure 4 shown in e. It can be seen that the interior of the material is composed of uniform and connected spherical cavities, the pore diameter is controlled at about 50nm, and the pore size unifo...

Embodiment 3

[0043] Add 1.5g of monodisperse silica microspheres with an average diameter of 50nm into 7.5mL of distilled water, and ultrasonically disperse for 30 minutes to make a suspension. Add 3g of starch and 0.9g of gelatin to the suspension, and keep stirring at 90°C More than 30 minutes to make it fully gelatinized, and then put the obtained sol into the 3D printer for printing process. After the obtained material was freeze-dried, in N 2 Carbonization at 850°C under atmosphere. The carbonized material is washed with 2mol / L NaOH solution, and then the excess lye is removed with 2mol / L dilute nitric acid solution, and the printed carbon material structure can be obtained after drying.

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Abstract

The invention relates to a 3D printing formation method for a mesoporous / macroporous carbon material with a controllable pore structure. The 3D printing formation method comprises the following steps:adding hard template powder into water, so as to prepare turbid liquid; adding starch and gelatin into the turbid liquid, and continuously stirring at a gelatinization temperature to adequately gelatinize the starch and the gelatin, so as to form sol; putting the sol into a 3D printer, and printing, so as to obtain a printed starch / gelatin material; drying the obtained starch / gelatin material, and carrying out high-temperature carbonization treatment under the protection of inert gas; putting the carbonized material into an alkali solution for soaking, so as to adequately dissolve a hard temperature; and taking out a sample, draining off the alkali solution, putting the sample into a dilute acid solution, washing, and drying. By utilizing molecular sieve hard templates with different ductstructures or monodisperse microsphere hard templates with different diameters, a duct structure with the sample structure and size with an original temperature is remained in a carbon material, so that a mesoporous / macroporous structure of the carbon material can be conveniently adjusted and controlled, and the mesoporous / macroporous carbon material is applicable to the preparation of materialssuch as electrochemical devices and catalyst carriers.

Description

technical field [0001] The invention relates to the technical field of 3D printing, in particular to a method for 3D printing of mesoporous / macroporous carbon materials with controllable pore structure. Background technique [0002] 3D printing is a rapid prototyping technology that can prepare materials with complex three-dimensional structures in the form of additive manufacturing based on digital models. 3D printing usually uses the CAD model of the material as the basis for slicing first, transforming the three-dimensional model into a two-dimensional unit sequence that can be recognized by the computer, and then obtains the G code that controls the parameters related to the printer's behavior through calculation, and then passes through various molding technologies. Materials with predesigned three-dimensional structures are prepared. Common molding techniques include fused deposition modeling (Fused Deposition Modeling, FDM), selective laser sintering (Selective Laser...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05C01B32/312
CPCC01P2002/72C01P2006/12C01P2006/17
Inventor 刘昌俊周昕瞳刘振星
Owner TIANJIN UNIV
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