丙烯丙烷高效分離用柔性聚丙烯支撐ZIF8膜
作者:
小柯機器人發布時間:2020/12/6 22:45:45
華南理工大學王海輝團隊開發了一種高效分離丙烯/丙烷用柔性聚丙烯支撐ZIF-8膜。該研究成果發表在2020年12月3日出版的國際學術期刊《美國化學會志》。
金屬-有機框架(MOF)膜在分離應用中具有巨大的潛力。目前有幾種MOF膜生長在聚合物基片上,目的是擴大膜的規模,但它們的脆性阻礙了其在工業上的應用。
研究人員採用快速電流驅動合成法(FCDS)在1h內成功地合成了聚丙烯(PP)負載的ZIF-8膜,該膜對C3H6-C3H8二元混合物具有良好的柔韌性,分離係數可達122±13。在彎曲ZIF-8膜使其曲率為92m–1後,PP負載ZIF-8膜的C3H6/C3H8分離性能保持不變。這種優異的力學性能對實際應用至關重要。此外,研究人員進一步在各種聚合物基片甚至聚合物中空纖維上合成了ZIF-8膜,以證明其生產的可擴展性。
附:英文原文
Title: Flexible Polypropylene-Supported ZIF-8 Membranes for Highly Efficient Propene/Propane Separation
Author: Yali Zhao, Yanying Wei, Luxi Lyu, Qianqian Hou, Jürgen Caro, Haihui Wang
Issue&Volume: December 3, 2020
Abstract: Metal–organic framework (MOF) membranes have enormous potential in separation applications. There are several MOF membranes grown on polymer substrates aimed for scale-up, but their brittleness hampers any industrial application. Herein, intergrown continuous polypropylene (PP)-supported ZIF-8 membranes have been successfully synthesized via fast current-driven synthesis (FCDS) within 1 h. The PP-supported ZIF-8 membranes exhibit a promising separation factor of 122 ± 13 for binary C3H6–C3H8 mixtures combined with excellent flexibility behavior. The C3H6/C3H8 separation performance of the PP-supported ZIF-8 membrane was found to be constant after bending the supported ZIF-8 film with a curvature of 92 m–1. This outstanding mechanical property is crucial for practical applications. Moreover, we further synthesized ZIF-8 membranes on various polymer substrates and even polymer hollow fibers to demonstrate the production scalability.
DOI: 10.1021/jacs.0c07481
Source: https://pubs.acs.org/doi/10.1021/jacs.0c07481