Jiang Qijiao, Mo Jinpeng, Han Shaobo, Liu Xi, Qu Baoliu, Xie Juan, Wang Xianfeng, Zhao Jing
College of Textile Science and Engineering, Wuyi University, Jiangmen 529020, China.
Polymers (Basel). 2025 May 18;17(10):1389. doi: 10.3390/polym17101389.
The rapid growth of industrial activities has significantly increased oil demand, leading to wastewater contamination with oil and causing severe environmental pollution. Traditional oil-water separation techniques, such as gravity separation, filtration, and chemical treatments, are hindered by low efficiency, high energy consumption, and secondary pollution. Membrane separation technology has emerged as a promising solution due to its simplicity, low energy consumption, and high efficiency. In this study, we report the fabrication of a novel polyvinylidene fluoride/ethylene-vinyl alcohol (PVDF/EVOH) nanofibrous membrane (NFM) with a unique balsam-pear-skin-like structure using a one-step electrospinning process. The membrane's superhydrophobicity and superoleophilicity were achieved via water vapor-induced phase separation (WVIPS), by optimizing the rheological properties and mixing ratio of EVOH and PVDF precursor solutions. The resulting PVDF/EVOH (PE12-3) NFM exhibits exceptional properties, achieving separation efficiencies of 99.4% for heavy oil and 98.9% for light oil, with a heavy oil flux of 18,020 L m h-significantly surpassing previously reported performances. Additionally, the membrane shows excellent recyclability, making it ideal for large-scale oil-water separation in wastewater treatment and environmental remediation. This one-step fabrication strategy offers an efficient and scalable approach for developing high-performance membranes to tackle oil pollution in water.
工业活动的快速增长显著增加了石油需求，导致含油废水污染，造成严重的环境污染。传统的油水分离技术，如重力分离、过滤和化学处理，存在效率低、能耗高和二次污染等问题。膜分离技术因其简单、低能耗和高效率而成为一种有前景的解决方案。在本研究中，我们报告了采用一步电纺工艺制备具有独特苦瓜皮状结构的新型聚偏氟乙烯/乙烯-乙烯醇（PVDF/EVOH）纳米纤维膜（NFM）。通过水蒸气诱导相分离（WVIPS），优化EVOH和PVDF前驱体溶液的流变性能和混合比例，实现了膜的超疏水性和超亲油性。所得的PVDF/EVOH（PE12-3）NFM表现出优异的性能，重油分离效率达到99.4%，轻油分离效率达到98.9%，重油通量为18020 L m h，显著超过先前报道的性能。此外，该膜具有优异的可回收性，使其成为废水处理和环境修复中大规模油水分离的理想选择。这种一步制备策略为开发高性能膜以解决水中油污染提供了一种高效且可扩展的方法。
