Aqueous Phase Synthesis of ZIF-8 Membrane with Controllable Location on an Asymmetrically Porous Polymer Substrate

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• 作者：Ezzatollah Shamsaei ; Xiaocheng Lin ; Ze-Xian Low ; Zahra Abbasi ; Yaoxin Hu ; Jefferson Zhe Liu ; Huanting Wang
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：March 9, 2016
• 年：2016
• 卷：8
• 期：9
• 页码：6236-6244
• 全文大小：518K
• ISSN：1944-8252

文摘

In this study, we have demonstrated a simple, scalable, and environmentally friendly route for controllable fabrication of continuous, well-intergrown ZIF-8 on a flexible polymer substrate via contra-diffusion method in conjunction with chemical vapor modification of the polymer surface. The combined chemical vapor modification and contra-diffusion method resulted in controlled formation of a thin, defect-free, and robust ZIF-8 layer on one side of the support in aqueous solution at room temperature. The ZIF-8 membrane exhibited propylene permeance of 1.50 × 10^–8 mol m^–2 s^–1 Pa⁻¹ and excellent selective permeation properties; after post heat-treatment, the membrane showed ideal selectivities of C₃H₆/C₃H₈ and H₂/C₃H₈ as high as 27.8 and 2259, respectively. The new synthesis approach holds promise for further development of the fabrication of high-quality polymer-supported ZIF membranes for practical separation applications.