Shen Lingyi, Wang Xia, Zhang Zhaohang, Jin Xiaoxiao, Jiang Min, Zhang Jianming
Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, Institute of Polymer Science and Engineering, Qingdao University of Science & Technology, Qingdao City 266042, PR China.
ACS Appl Mater Interfaces. 2021 Mar 31;13(12):14653-14661. doi: 10.1021/acsami.0c22090. Epub 2021 Mar 17.
Design of durable and recyclable superhydrophobic materials for oil/water separation is a major concern in the field of wastewater treatment. Functionalization of a biodegradable matrix with controllable grown crystals brings out a new research perspective. In this study, multiscale zeolitic imidazolate frameworks (ZIFs) were grown and decorated on a polylactic acid (PLA) nonwoven fabric (NWF) to construct a superhydrophobic material by an growth method and a spraying process. The stable superhydrophobic layer contains two kinds of ZIF crystals showing microscale flake-like structures and nanoscale particles. The morphology and surface energy of such a hierarchically structured ZIF-modified PLA is controllable by the adjustment of experimental parameters. The as-prepared PLA hybrid materials exhibit high separation efficiency and recyclability as for water-nitromethane and water-toluene mixtures. Based on the wetting envelopes of the ZIF-modified PLA material, its separation performance for various oil/water mixtures can be preliminarily assessed before the application.
设计用于油水分离的耐用且可回收的超疏水材料是废水处理领域的一个主要关注点。用可控生长的晶体对可生物降解基质进行功能化带来了一个新的研究视角。在本研究中，通过生长法和喷涂工艺在聚乳酸（PLA）无纺布（NWF）上生长并修饰多尺度沸石咪唑酯骨架（ZIFs），以构建一种超疏水材料。稳定的超疏水层包含两种呈现微观尺度片状结构和纳米尺度颗粒的ZIF晶体。通过调整实验参数，这种具有分级结构的ZIF修饰的PLA的形态和表面能是可控的。所制备的PLA杂化材料对于水 - 硝基甲烷和水 - 甲苯混合物表现出高分离效率和可回收性。基于ZIF修饰的PLA材料的润湿包络线，在应用之前可以初步评估其对各种油水混合物的分离性能。
