Polydopamine Nanocluster Embedded Nanofibrous Membrane via Blow Spinning for Separation of Oil/Water Emulsions

Molecules

Xin Min¹  Ziling Xu¹  Chaoqi Liu¹  Zhaohui Huang¹  Xiaowen Wu¹  Yan’gai Liu¹  Yajing Zhao¹  Zhenglian Liu¹  Qingyin Xia²  Minghao Fang² 

[1] Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China;School of Earth Science and Resources, China University of Geosciences, Beijing 100083, China;

关键词: nanofiber membrane;    polydopamine nanocluster;    blow spinning;    oil–water emulsion;   

DOI  :  10.3390/molecules26113258

来源: DOAJ

【 摘 要 】

Developing a porous separation membrane that can efficiently separate oil–water emulsions still represents a challenge. In this study, nanofiber membranes with polydopamine clusters polymerized and embedded on the surface were successfully constructed using a solution blow-spinning process. The hierarchical surface structure enhanced the selective wettability, superhydrophilicity in air (≈0°), and underwater oleophobicity (≈160.2°) of the membrane. This membrane can effectively separate oil–water emulsions, achieving an excellent permeation flux (1552 Lm⁻² h⁻¹) and high separation efficiency (~99.86%) while operating only under the force of gravity. When the external driving pressure was increased to 20 kPa, the separation efficiency hardly changed (99.81%). However, the permeation flux significantly increased to 5894 Lm⁻² h⁻¹. These results show that the as-prepared polydopamine nanocluster-embedded nanofiber membrane has an excellent potential for oily wastewater treatment applications.

【 授权许可】

Unknown