Title: Bionic multifunctional fibrous materials for efficient oil/water separation
Authors: Yuyan Guo1, Zhiguang Guo1，2, Weimin Liu2
Special wettability fibrous materials have received a lot of attention because of their good connectivity, mechanical flexibility, large specific surface area, and ease of shape manipulation. Their outstanding performance paves the way toward efficient oil/water separation in a variety of environments and for separation requirements. This paper discusses the distinct advantages, challenges, and future research directions of various substrates for fibrous materials, such as nonwoven natural biomass fibers, fabrics, electrospinning fibers, metallic fibers, and inorganic nonmetallic fibers. The special wettability fibrous filter materials and fibrous adsorbents are summarized based on the different separation methods. The principles of preparation of various special wettabilities are introduced, and the unique advantages of fibrous adsorbents are emphasized. The preparation strategy of fibrous filter materials is discussed, as well as some representative work and research progress. The benefits, drawbacks, and research directions in terms of various materials are examined. This article emphasizes the pollution resistance of fibrous filter materials and the elasticity of fibrous adsorbents. Finally, the prospects in terms of the problems, challenges, and future development of special wettability fibrous materials used in oil/water separation are discussed.
Fig.1 Mechanical principle of oil/water separation. (a,b) The contact angle θ of water droplets (a) or oil droplet (b) on the surface ofafiber materialis less than 90°, ΔP<0, and there is a capillary force that enables the droplet to penetrate the material downward. (c,d) The contact angle θ of water droplets (c) or oil droplet (d) on the surface of a fiber material is greater than 90°, ΔP>0, and there is a capillary force that prevents the droplet from penetrating the material downward.
Droplet（《液滴》）是由吉林大学主办，与国际著名出版公司Wiley合作出版的英文国际性学术期刊，是国际上第一本全面报道液滴／气泡交叉领域科研成果的学术期刊。目前为季刊，主要发表液滴／气泡相关领域的原创性研究论文、综述及评论性文章，重点报道与液滴／气泡相关的结构、材料和系统设计、制备和调控等方面的基础研究及工程应用。现任主编为中国科学院院士任露泉教授、美国加利福尼亚大学洛杉矶分校C.J.Kim教授。执行主编由香港理工大学王钻开教授担任。
目前，Droplet（《液滴》）已通过全球最具影响力的开放存取期刊目录（Directory of Open Access Journals, DOAJ）评估，正式被DOAJ数据库收录。本刊旨在成为跨学科的高水平学术交流平台，展示液滴和气泡相关领域的前沿研究成果，推进国际科研传播与合作。
编辑部总编：张成春教授，副总编：王丹编审。
