The effect of the composition of the solution in the coagulation bath on the microstructures of hollow mesoporous polyacrylonitrile fibers

ZHANG Bing; LU Chun-xiang; LIU Yao-dong; ZHOU Pu-cha; YUAN Shu-xia; YU Zhuang

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Article Navigation > New Carbon Mater. > 2019 > 34(1): 44-50

ZHANG Bing, LU Chun-xiang, LIU Yao-dong, ZHOU Pu-cha, YUAN Shu-xia, YU Zhuang. The effect of the composition of the solution in the coagulation bath on the microstructures of hollow mesoporous polyacrylonitrile fibers. New Carbon Mater., 2019, 34(1): 44-50.

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The effect of the composition of the solution in the coagulation bath on the microstructures of hollow mesoporous polyacrylonitrile fibers

1.
CAS Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;
2.
University of Chinese Academy of Sciences, Beijing 100049, China;
3.
National Engineering Laboratory for Carbon Fiber Technology, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China

Funds: National Natural Science Foundation of China (51303199).

Received Date: 2018-12-25
Accepted Date: 2019-02-20
Rev Recd Date: 2019-02-02
Publish Date: 2019-02-28

Abstract

Abstract

Combining the advantages of hollow and mesoporous structures, hollow mesoporous fibers have great potential in the adsorption of macromolecules. Such fibers were fabricated by a wet-spinning method from a polymer mixture of polyacrylonitrile and alkali lignin. The effect of the composition of the solution in the coagulation bath on the microstructures of the hollow mesoporous fibers produced was investigated by SEM, TGA and nitrogen adsorption. Results indicate that the diameter and pore structure of the fibers were changed by the composition of the solution in the coagulation bath. By increasing the concentration of dimethyl sulfoxide, the average pore size of the fibers decreased from 45.3 to 24.4 nm while the outer diameter and porosity reached minima of 137.5 μm and 88.7%, respectively while the wall thickness reached a maximum of 20.3 μm. The fibers can be processed into hollow mesoporous carbon fibers because of their high carbon yield of 40%.
- Polyacrylonitrile,
- Hollow-mesoporous fibers,
- Composition of coagulation bath

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References(22)

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