Self-induced crystallization to form a shish-kebab structure on PLA-based Janus membrane to promote water transmission and interlayer binding force

被引：7

作者：

Dai, Tianliang ^{[1
]}

Wang, Lina ^{[1
]}

Yao, Juming ^{[1
]}

Zhu, Guocheng ^{[1
]}

Guo, Baochun ^{[2
]}

Militk, Jiri ^{[3
]}

Kremenakova, Dana ^{[3
]}

Zhang, Ming ^{[1
]}

机构：

[1] Zhejiang Sci tech Univ, Zhejiang Czech Joint Lab Adv Fiber Mat, Zhejiang, Peoples R China

[2] South China Univ Technol, Dept Polymer Mat & Engn, Guangzhou 510640, Peoples R China

[3] Tech Univ Liberec, Fac Text Engn, Dept Mat Engn, Liberec, Czech Republic

来源：

SEPARATION AND PURIFICATION TECHNOLOGY | 2024年 / 332卷

关键词：

Electrospinning; Janus membrane; Shish-kebab structure; Water transport; Emulsion separation; POLYLACTIDE; CRYSTALS;

D O I：

10.1016/j.seppur.2023.125793

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Janus membranes are widely used in fields such as oil-water separation and wound dressings due to their asymmetric wetting properties. However, the weak interface binding force between the hydrophobic and hy-drophilic layers can affect the liquid transport performance and membrane separation. In this study, we have reported a method using self-induced crystallization to grow shish-kebab (SK) structures in electrospinning polylactic acid-based fiber membranes. Peel testing revealed that the peel load after induced crystallization increased from 0 to 0.05 N to 0.05-0.15 N, and the time for droplets to penetrate from the hydrophobic side to the hydrophilic side decreased from 16S to 3S. This indicates that SK structures can enhance the adhesion be-tween the hydrophilic and hydrophobic interface, as well as facilitating droplet transport. Through the oil-water separation experiment, it was discovered that the presence of SK structures can filter out more microemulsions. For different emulsions (kerosene, petroleum, n-hexane, petroleum ether, tea tree oil), the separation efficiency of Janus-SK membrane increased by 1.67 %, 2.5 %, 3.0 %, 9.7 %, 4.3 %, respectively. The development of Janus membranes has been provided with a new direction.

引用

页数：9