冷冻凝固相分离法制备孔径可调的超疏水聚乳酸膜用于油水分离
The Preparation of Superhydrophobic Polylactic Acid Membrane with Adjustable Pore Size by Freeze Solidification Phase Separation Method for Oil-Water Separation.
作者信息
Zhang Yan, Sun Tianyi, Zhang Dashuai, Sun Shishu, Liu Jinrui, Li Bangsen, Shi Zaifeng
机构信息
Key Laboratory of Water Pollution Treatment & Resource Reuse, Hainan Normal University, Haikou 571158, China.
College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China.
出版信息
Molecules. 2023 Jul 22;28(14):5590. doi: 10.3390/molecules28145590.
An environmentally friendly pore size-controlled, superhydrophobic polylactic acid (PLA) membrane was successfully prepared by a simpler freeze solidification phase separation method (FSPS) and solution impregnation, which has application prospects in the field of oil-water separation. The pore size and structure of the membrane were adjusted by different solvent ratios and solution impregnation ratios. The PLA-FSPS membrane after solution impregnation (S-PLA-FSPS) had the characteristics of uniform pore size, superhydrophobicity and super lipophilicity, its surface roughness Ra was 338 nm, and the contact angle to water was 151°. The S-PLA-FSPS membrane was used for the oil-water separation. The membrane oil flux reached 16,084 L·m·h, and the water separation efficiency was 99.7%, which was much higher than that of other oil-water separation materials. In addition, the S-PLA-FSPS membrane could also be applied for the adsorption and removal of oil slicks and underwater heavy oil. The S-PLA-FSPS membrane has great application potential in the field of oil-water separation.
通过一种更简便的冷冻凝固相分离法（FSPS）和溶液浸渍法成功制备了一种具有孔径可控、超疏水性能的环保型聚乳酸（PLA）膜，该膜在油水分离领域具有应用前景。通过不同的溶剂比例和溶液浸渍比例来调节膜的孔径和结构。经溶液浸渍后的PLA-FSPS膜（S-PLA-FSPS）具有孔径均匀、超疏水和超亲油的特性，其表面粗糙度Ra为338纳米，与水的接触角为151°。S-PLA-FSPS膜用于油水分离。膜的油通量达到16084 L·m·h，水分离效率为99.7%，远高于其他油水分离材料。此外，S-PLA-FSPS膜还可用于吸附和去除浮油及水下重油。S-PLA-FSPS膜在油水分离领域具有巨大的应用潜力。
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