基于喷吹纺丝法制备的负载聚多巴胺纳米簇的纳米纤维膜用于油水乳液分离。
Polydopamine Nanocluster Embedded Nanofibrous Membrane via Blow Spinning for Separation of Oil/Water Emulsions.
机构信息
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.
出版信息
Molecules. 2021 May 28;26(11):3258. doi: 10.3390/molecules26113258.
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 h) 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 h. These results show that the as-prepared polydopamine nanocluster-embedded nanofiber membrane has an excellent potential for oily wastewater treatment applications.
制备能够高效分离油水乳液的多孔分离膜仍然是一个挑战。本研究采用溶液喷射纺丝工艺成功构建了表面聚合和嵌入聚多巴胺纳米簇的纳米纤维膜。分层表面结构增强了膜的选择性润湿性，空气下的超亲水性（≈0°）和水下的低油润湿性（≈160.2°）。该膜可有效分离油水乳液，在仅受重力作用的情况下，表现出优异的渗透通量（1552 Lm h）和高分离效率（~99.86%）。当外部驱动压力增加到 20 kPa 时，分离效率几乎没有变化（99.81%）。然而，渗透通量显著增加到 5894 Lm h。这些结果表明，所制备的聚多巴胺纳米簇嵌入纳米纤维膜具有出色的用于处理含油废水的潜力。
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