Citation: Sen-He Chen, Bai-Heng Wu, Jin-Cheng Fu, Guo-Jun Wang, Ling-Shu Wan, Zhi-Kang Xu. Vertically Oriented Microporous Membranes Prepared by Bidirectional Freezing[J]. Chinese Journal of Polymer Science, ;2018, 36(7): 880-887. doi: 10.1007/s10118-018-2113-z shu

Vertically Oriented Microporous Membranes Prepared by Bidirectional Freezing

Sen-He Chen ^1,2 ,
Bai-Heng Wu ^1,2 ,
Jin-Cheng Fu ^1,2 ,
Guo-Jun Wang ^1,2 ,
Ling-Shu Wan ^1,2,, ,
Zhi-Kang Xu ^1,2

a.
Ministry of Education Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
b.
Key Laboratory of Adsorption and Separation Materials & Technologies of Zhejiang Province, Zhejiang University, Hangzhou 310027, China

Corresponding author: Ling-Shu Wan, lswan@zju.edu.cn
Received Date: 18 October 2017
Accepted Date: 20 January 2018
Available Online: 12 July 2018

Polystyrene membranes with precisely controlled and vertically oriented pores are fabricated by a bidirectional freezing process. In this process, the influence of polymer in growth of diphenyl sulfone (DPS) crystals has been demonstrated by XRD and simulated by DFT based on the interaction between DPS crystal faces and polystyrene (PS). The influence of temperature gradient on membrane structures is also elucidated. Compared to the original membrane and modified traditional membranes, modified PS membranes with vertically oriented pores show large and stable fluxes in the processes of multiple oil and water separation.
- Separation membrane,
- Vertical pores,
- Bidirectional freezing,
- Oil separation
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