- Enhancing the oil/water separation efficiency of polylactic acid fiber membrane via polydimethylsiloxane-polycaprolactone copolymer
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- 发表刊物：Journal of Environmental Chemical Engineering
- 关键字：PDMS-PCL，PLA，Electropsun fiber membrane，Oil/water separation，Self-cleaning
- 摘要：Membrane technology is one of the important methods of treating oily wastewater due to low energy consumption. How to design the membrane with high efficiency, biodegradable, reusable and good mechanical properties has attracted increasing interest. In this work, a polydimethylsiloxane-polycaprolactone (PDMS- PCL) was synthesized to endow polylactic acid (PLA) fiber membrane with superhydrophobicity and superoleophilicity via electrospinning without secondary processing. When the blend ratio of PDMS-PCL/PLA is 15 wt%, the water contact angle of the fiber membrane is 155.1 ± 3◦, and the oil contact angle is almost zero. The tensile strength and elongation at break are 2.05 ± 0.16 MPa and 37.9 ± 2.3 %, respectively. The fiber membrane exhibited high oil/water separation performance and quick adsorption of oil drop underwater. The permeate flux and separation efficiency for n-hexane are 3550 ± 50 L⋅m 2⋅h 1 and 99.3 ± 0.2 %, separately. It also has excellent self-cleaning and durable properties. The fiber membrane maintains high oil flux, separation efficiency, and mechanical properties after more than 10 rounds of separation. The fiber membrane can resist the external environment variation such as to some extent. The water contact angle of the fiber membrane undergoing friction and heating at 100 ◦C stably remains at about 150◦. The weight loss is little in salt solution. Then this simple efficient method is suitable large-scale production and will promote membrane technologies in application of oil/water separation.
- 合写作者：于婉婷
- 第一作者：宋晓峰（教师）
- 论文类型：期刊论文
- 卷号：12
- 页面范围：114738
- 是否译文：否
- 发表时间：2024-11-08
- 收录刊物：SCI
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