Optimizing membrane degassing with Hyflon AD 40L-modified polypropylene hollow fiber and pre-filling techniques

doi:10.1016/j.cjche.2024.06.030

Chinese Journal of Chemical Engineering ›› 2024, Vol. 75 ›› Issue (11): 181-190.DOI: 10.1016/j.cjche.2024.06.030

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Optimizing membrane degassing with Hyflon AD 40L-modified polypropylene hollow fiber and pre-filling techniques

Hongyu Chen^1,2, Yinchao Jin^1,2, Zhiying Lu^1,2, Yangming Cheng³, Zhaohui Wang^1,2,4, Zhaoliang Cui^1,2,4

1. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China;
2. National Engineering Research Center for Special Separation Membrane, Nanjing Tech University, Nanjing 210009, China;
3. Jiangsu Aikemo High-Technology Co., Ltd, Suzhou 215000, China;
4. Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing 210009, China

Received:2024-02-26 Revised:2024-06-13 Accepted:2024-06-14 Online:2024-09-04 Published:2024-11-28
Contact: Zhaohui Wang,E-mail:zhwang@njtech.edu.cn;Zhaoliang Cui,E-mail:zcui@njtech.edu.cn
Supported by:
The authors would like to express their appreciation for the financial support of the National Key Research and Development Program of China (2020YFC0862903), the National Natural Science Foundation of China (22078146), the Key Research and Development program of Jiangsu Province (BE2021022), the Materials-Oriented Chemical Engineering State Key Laboratory Program (KL19-04), the Natural Science Foundation of Jiangsu Province (BK20200091).

Optimizing membrane degassing with Hyflon AD 40L-modified polypropylene hollow fiber and pre-filling techniques

Hongyu Chen^1,2, Yinchao Jin^1,2, Zhiying Lu^1,2, Yangming Cheng³, Zhaohui Wang^1,2,4, Zhaoliang Cui^1,2,4

1. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China;
2. National Engineering Research Center for Special Separation Membrane, Nanjing Tech University, Nanjing 210009, China;
3. Jiangsu Aikemo High-Technology Co., Ltd, Suzhou 215000, China;
4. Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing 210009, China

通讯作者: Zhaohui Wang,E-mail:zhwang@njtech.edu.cn;Zhaoliang Cui,E-mail:zcui@njtech.edu.cn
基金资助:
The authors would like to express their appreciation for the financial support of the National Key Research and Development Program of China (2020YFC0862903), the National Natural Science Foundation of China (22078146), the Key Research and Development program of Jiangsu Province (BE2021022), the Materials-Oriented Chemical Engineering State Key Laboratory Program (KL19-04), the Natural Science Foundation of Jiangsu Province (BK20200091).

Abstract

Abstract: This paper conducts a comparative analysis of the anti-wetting properties and degassing performance of both homemade and commercial membranes. Additionally, it introduces a unique approach to hydrophobic modification of high-flux membranes. The study involved the utilization of Hyflon AD40L for multiple coatings on the surface of polypropylene (PP) hollow fiber membranes. Several variables, including modification solution concentration, temperature, coating duration, number of coating cycles, polymer type, and the choice and concentration of the pore-blocking agent, were systematically investigated to establish the optimal modification process. Characterization of the modified membrane and degassing experiments revealed significant improvements. Specifically, the contact angle increased from 95.5° to 113.1°, while the trans-membrane differential pressure surged from 10.7 kPa to 154.6 kPa, marking a remarkable 14.4-fold enhancement. This enhancement is attributed to the improved anti-wetting capabilities of the modified membrane. In the degassing experiments, the modified membrane-based module demonstrated an impressive 95.0% dissolved oxygen removal rate, with a corresponding mass transfer coefficient reaching 18.01×10^-3 m·h^-1. These results underscore the substantial potential of the Hyflon AD40 L/PP membrane for applications in membrane degassing.

Key words: Hyflon, Polypropylene, Anti-wetting modification, Membrane degassing, Pore-blocking agent

摘要： This paper conducts a comparative analysis of the anti-wetting properties and degassing performance of both homemade and commercial membranes. Additionally, it introduces a unique approach to hydrophobic modification of high-flux membranes. The study involved the utilization of Hyflon AD40L for multiple coatings on the surface of polypropylene (PP) hollow fiber membranes. Several variables, including modification solution concentration, temperature, coating duration, number of coating cycles, polymer type, and the choice and concentration of the pore-blocking agent, were systematically investigated to establish the optimal modification process. Characterization of the modified membrane and degassing experiments revealed significant improvements. Specifically, the contact angle increased from 95.5° to 113.1°, while the trans-membrane differential pressure surged from 10.7 kPa to 154.6 kPa, marking a remarkable 14.4-fold enhancement. This enhancement is attributed to the improved anti-wetting capabilities of the modified membrane. In the degassing experiments, the modified membrane-based module demonstrated an impressive 95.0% dissolved oxygen removal rate, with a corresponding mass transfer coefficient reaching 18.01×10^-3 m·h^-1. These results underscore the substantial potential of the Hyflon AD40 L/PP membrane for applications in membrane degassing.

关键词: Hyflon, Polypropylene, Anti-wetting modification, Membrane degassing, Pore-blocking agent

Hongyu Chen, Yinchao Jin, Zhiying Lu, Yangming Cheng, Zhaohui Wang, Zhaoliang Cui. Optimizing membrane degassing with Hyflon AD 40L-modified polypropylene hollow fiber and pre-filling techniques[J]. Chinese Journal of Chemical Engineering, 2024, 75(11): 181-190.

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Optimizing membrane degassing with Hyflon AD 40L-modified polypropylene hollow fiber and pre-filling techniques

Optimizing membrane degassing with Hyflon AD 40L-modified polypropylene hollow fiber and pre-filling techniques

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