College of Bioresources Chemical and Materials Engineering, Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science & Technology, Xi'an 710021, China.
College of Bioresources Chemical and Materials Engineering, Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science & Technology, Xi'an 710021, China.
Int J Biol Macromol. 2023 Dec 31;253(Pt 3):126865. doi: 10.1016/j.ijbiomac.2023.126865. Epub 2023 Sep 17.
Electrospinning nanofibers membrane has received much attention to remove the insoluble oil from the sewage, while the poor mechanical strength and low oil/water separation efficiency of membranes limit their practical application. Here, we prepared a superwettable deacetylated cellulose acetate (d-CA)-based electrospinning nanofibers membrane simply dipped by bacterial cellulose (BC) and cross-linked with citric acid (CCA) to construct the spider-web structure spontaneously. Compared with the pristine d-CA membrane, the obtained d-CA/BC@CCA membrane exhibits the remarkable oil/water separation performance. The flux and separation efficiency of n-hexane/water emulsion without (SFE) and with (SSE) emulsifier for d-CA/BC@CCA membrane are 9364 L·m·h·bar, 98.34 % and 5479 L·m·h·bar, 99.39 %, respectively, which are mainly attributed to the improved hydrophilicity of its surface and the decreased pore sizes caused by the unique spider-web structure. In addition, d-CA/BC@CCA membrane also possesses the outstanding mechanical properties, the better cycle stability, as well as the excellent durability. This study provides a novel strategy for the construction of the high-performance oil/water separation membrane.
静电纺丝纳米纤维膜因其能从污水中去除不溶性油而受到广泛关注，但膜的机械强度差和油水分离效率低限制了其实际应用。在这里，我们简单地通过细菌纤维素 (BC) 浸泡和柠檬酸 (CCA) 交联制备了一种超润湿的脱乙酰基醋酸纤维素 (d-CA) 基静电纺丝纳米纤维膜，从而构建了自发的蜘蛛网状结构。与原始的 d-CA 膜相比，所获得的 d-CA/BC@CCA 膜表现出优异的油水分离性能。对于不含 (SFE) 和含 (SSE) 乳化剂的正己烷/水乳液，d-CA/BC@CCA 膜的通量和分离效率分别为 9364 L·m·h·bar、98.34%和 5479 L·m·h·bar、99.39%，这主要归因于其表面亲水性的提高和蜘蛛网状结构导致的孔径减小。此外，d-CA/BC@CCA 膜还具有优异的力学性能、更好的循环稳定性和出色的耐久性。本研究为高性能油水分离膜的构建提供了一种新策略。
