Nitrogen-oxygen double-doped porous carbon fiber, preparation method and application
A porous carbon fiber, double-doped technology, applied in the direction of separation methods, fiber chemical characteristics, chemical instruments and methods, etc., can solve problems such as pore structure blockage, achieve the effects of low energy consumption, excellent adsorption performance, and simple preparation process
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0041] (1) Add biphenyltetracarboxylic dianhydride and diaminodiphenyl ether in the dimethyl sulfoxide solution of polyacrylonitrile, and obtain a polyacrylonitrile / polyimidic acid precursor with a solid content of 20wt% after polycondensation reaction mixed solution;
[0042] (2) The polyacrylonitrile / polyimide acid precursor mixed solution of step (1) is wet-spun to obtain a composite fiber precursor; in the composite fiber precursor, polyacrylonitrile and polyimide acid The mass ratio of the polyimide formed after amination is 1:0.1;
[0043] (3) Pre-oxidize-imidize the composite fiber precursors in an air atmosphere, treat at 180°C for 10 minutes, and then treat at 250°C for 30 minutes to obtain polyacrylonitrile / polyimide-based fibers;
[0044] (4) Carry out carbonization treatment on the polyacrylonitrile / polyimide-based fiber under nitrogen atmosphere, and treat at 800° C. for 60 minutes to obtain the nitrogen-oxygen double-doped porous carbon fiber.
[0045] The infrar...
Embodiment 2
[0048] The preparation method of the nitrogen-oxygen double-doped porous carbon fiber in Example 2 is the same as that in Example 1, the difference is only in adjusting the polyimide formed after the imidization of polyacrylonitrile and polyimide in the composite fiber precursor. The mass ratio of amine is 1:0.2;
[0049] The nitrogen content of the nitrogen-oxygen double-doped porous carbon fiber obtained in this embodiment is 15.8%, and the oxygen content is 9.6%. Figure 4 As shown, the diameter is 113.5-129.2 μm; there are more uniform lotus-shaped pore structures on the inner skeleton of a single fiber.
[0050] The nitrogen-oxygen double-doped porous carbon fiber was heated at 40 °C and 15% CO 2 / 85%N 2 The adsorption curve of carbon dioxide in the atmosphere is as follows Figure 5 As shown, the carbon dioxide adsorption capacity of the nitrogen-oxygen double-doped porous carbon fiber is 26.2 mg / g.
Embodiment 3
[0052] The preparation method of the nitrogen-oxygen double-doped porous carbon fiber in Example 3 is the same as that in Example 1, the difference is only in adjusting the polyimide formed after imidization of polyacrylonitrile and polyimide in the composite fiber precursor. The mass ratio of amine is 1:0.3;
[0053] The nitrogen content of the nitrogen-oxygen double-doped porous carbon fiber obtained in this embodiment is 14.4%, and the oxygen content is 11.5%. The scanning electron micrograph is as follows Figure 6 As shown, the diameter is 120.9-132.8 μm; a large number of uniform lotus-shaped pore structures appear on the inner skeleton of a single fiber.
[0054] The nitrogen-oxygen double-doped porous carbon fiber was heated at 40 °C and 15% CO 2 / 85%N 2 The adsorption curve of carbon dioxide in the atmosphere is as follows Figure 7 As shown, the carbon dioxide adsorption capacity of the nitrogen-oxygen double-doped porous carbon fiber is 27.4mg / g.
PUM
| Property | Measurement | Unit |
|---|---|---|
| diameter | aaaaa | aaaaa |
| diameter | aaaaa | aaaaa |
| adsorption capacity | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More