Cellulose Asymmetric Carbon Hollow Fiber Membrane Controlled by Radiation and Heat Treatment Conditions 


Vol. 59,  No. 6, pp. 356-364, Dec.  2022
10.12772/TSE.2022.59.356


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  Abstract

This study investigated the effect of spinning and heat treatment conditions on the cellulose carbon hollow fiber membrane. A cellulose-based asymmetric carbon hollow fiber membrane has been prepared by wet spinning process and heat treatment. Cellulose was dissolved using EmimAc/DMSO and discharged in a coagulation bath at 60oC to form asymmetric pores. To maintain the formed asymmetric pores even after the drying process, there was a stepped exchange process of solvent for the elimination of water in the fiber. The formed asymmetric pores are composed of a selective layer with dense pores and a support layer with finger-like pores. These asymmetric pores are important structures for increasing the selectivity and permeability of the carbon hollow fiber membrane. The pore structure according to the heat treatment temperature was analyzed. Because the pore size and micropores are controlled by the heat treatment condition, we applied different temperatures (550-850oC) in the heat treatment process. It was confirmed by BET that the surface area and pore size distribution improved 18.5%. As a result, it was confirmed that the structure and pore size of the cellulose carbon hollow fiber membrane were significantly affected by the spinning, solvent exchange, and heat treatment process conditions.

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pISSN : 1225 - 1089
eISSN : 2288 - 6419

한국연구재단 우수등재학술지 유지 (2022년)