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<p>Polylactic acid (PLA) membranes offer advantages such as biodegradability, non-toxicity, and biocompatibility for oil–water separation. However, it remains challenging to fabricate PLA membranes with sufficient mechanical strength and hydrophobicity for practical applications. In this study, a superhydrophobic fibrous membrane based on PLA and Polybutylene terephthalate adipate (PBAT) is prepared via electrospinning, followed by a high-humidity treatment. The effects of PBAT content and high humidity treatment on the morphology, hydrophobicity, and mechanical properties of PBAT/PLA composite fiber membranes are investigated. The results show that the introduction of PBAT effectively enhances the fiber diameter, crystallization, hydrophobicity, and mechanical properties of PBAT/PLA fibers. Moreover, the high humidity treatment further improves the mechanical and hydrophobic properties of the membranes. When 0.2&#xa0;g of PBAT is added and the high humidity treatment lasts for 24&#xa0;h, the resulting PBAT/PLA fibrous membrane exhibits an outstanding water contact angle (WCA) of 158.23°, tensile strength of 3.802&#xa0;MPa, excellent oil–water separation flux (6500 L/(m<sup>2</sup>·h)), and efficiency of 99.80%, demonstrating great potential for oil–water separation applications.</p>

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Superhydrophobic PBAT/PLA Fibrous Membrane with Excellent Mechanical Performance for Highly Efficient Oil–Water Separation

  • 期刊论文

  • 发表日期：

    2025年3月17日

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  • Xiaoyu Guo,
  • Changjian Feng,
  • Lilan Huang,
  • Hongqiang Wang,
  • Fang Liu,
  • Jiao Li

摘要

Polylactic acid (PLA) membranes offer advantages such as biodegradability, non-toxicity, and biocompatibility for oil–water separation. However, it remains challenging to fabricate PLA membranes with sufficient mechanical strength and hydrophobicity for practical applications. In this study, a superhydrophobic fibrous membrane based on PLA and Polybutylene terephthalate adipate (PBAT) is prepared via electrospinning, followed by a high-humidity treatment. The effects of PBAT content and high humidity treatment on the morphology, hydrophobicity, and mechanical properties of PBAT/PLA composite fiber membranes are investigated. The results show that the introduction of PBAT effectively enhances the fiber diameter, crystallization, hydrophobicity, and mechanical properties of PBAT/PLA fibers. Moreover, the high humidity treatment further improves the mechanical and hydrophobic properties of the membranes. When 0.2 g of PBAT is added and the high humidity treatment lasts for 24 h, the resulting PBAT/PLA fibrous membrane exhibits an outstanding water contact angle (WCA) of 158.23°, tensile strength of 3.802 MPa, excellent oil–water separation flux (6500 L/(m2·h)), and efficiency of 99.80%, demonstrating great potential for oil–water separation applications.