文献类型：期刊文献

英文题名：Movement behavior and morphological change of droplets on vertically crossed fibers

作者：Lu, Zhaojin[1,2];Zhang, Lian[2];Wang, Zhiwen[2];Yang, Hang[2];Shi, Chengcheng[2];Bai, Zhishan[2]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Environm Protect Key Lab Environm Risk Asses, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China

年份：2025

卷号：705

外文期刊名：COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS

收录：;EI(收录号：20244517339609);WOS:【SCI-EXPANDED(收录号:WOS:001354905300001)】；

基金：The research was sponsored by the National Natural Science Foun-dation of China, China (No. 22408101, 22078102) and the National Science Fund for Distinguished Young Scholars, China (No. 22225804) .

语种：英文

外文关键词：Emulsion separation; Vertically crossed fibers; Sliding behavior; Droplet capture; Droplet coalescence

摘要：Droplet capture and coalescence are critical processes for enhancing emulsion separation efficiency in oily wastewater treatment. In this paper, four kinds of motion behaviors and secondary droplet formation behaviors of oil droplets on vertically crossed fibers in a water environment were investigated using high-speed camera technology. The research shows that during the droplet capture process, droplets on large-diameter horizontal fiber exhibit greater lateral spreading, and smaller vertical elongation. Increasing the diameter of horizontal fiber significantly shortens droplet capture time. The capture time on lipophilic fiber intersection of 190-420 mu m is 14 ms less than that of 190-190 mu m. During the droplet coalescence process, the liquid bridge on large-diameter horizontal fiber is wider, and the droplet contraction ratio is smaller. The droplet contraction ratio on fiber intersection of 190-420 mu m is 0.3 smaller than that of 190-190 mu m. Increasing the diameter of horizontal fiber can promote rapid fusion between droplets, but lipophobic fibers hinder the degree of fusion and deformation. Furthermore, the diameter and wettability of horizontal fibers have significant effects on the volume of secondary droplets. The volume of secondary droplets increases with the diameter of lipophilic horizontal fiber in the capture process. The volume of secondary droplets on lipophilic horizontal fiber is approximately three times larger than that on lipophobic horizontal fiber in the coalescence process. These findings contribute to understanding the details of coalescence separation and optimizing the design of fiber fillers.