@article{c43db786a84b42f392995a8aa88514a8,
title = "Effect of ZIF-71 ligand-exchange surface modification on biofuel recovery through pervaporation",
abstract = "In this paper, zeolitic imidazolate framework-71 (ZIF-71) particles (~500 nm diameter) were modified with four different ligands through the solvent-assisted linker exchange (SALE) method. The objective of this was to assess the effect of ligand exchanged ZIF-71 on the performance of ZIF-71/polydimethylsiloxane (PDMS) mixed matrix membranes (MMMs) for removal of alcohol from dilute aqueous solutions. Both Fourier-transform infrared spectroscopy (ATR-FTIR) and proton nuclear magnetic resonance (1H NMR) spectroscopy confirmed the exchange of the new ligands into the ZIF-71 material. The 1H NMR spectra demonstrated the molar ratios of the ligand-exchange into the ZIF-71 particles. X-ray diffraction and scanning electron microscopy results showed that the crystal structure and the morphology of ZIF-71 were maintained after the ligand-exchange modification process. Modified ZIF-71/PDMS composite membranes were synthesized to study the effect of ligand modification on alcohol/water separation performance. Ligand-modified ZIFs dispersed more evenly in the condensation cure PDMS polymer matrix than the unmodified ZIFs. The alcohol permeability and alcohol/water selectivity for ethanol and 1-butanol remained the same or decreased for membranes made with ligand-exchanged ZIF-71 particles.",
keywords = "Ligand-exchange, Mixed matrix membrane, Pervaporation",
author = "Huidan Yin and Pinar Cay-Durgun and Tianmiao Lai and Guanghui Zhu and Kiah Engebretson and Regina Setiadji and Green, {Matthew D.} and Lind, {Mary Laura}",
note = "Funding Information: We gratefully acknowledge the National Science Foundation CAREER (Award # CBET-1254215 ) for supporting this work. We thank the LeRoy Eyring Center for Solid State Science at Arizona State University (ASU) for providing the XRD and AFM facility and the Bio-Design Institute at ASU for providing the contact angle facility. We would also like to show our gratitude to the Magnetic Resonance Research Center at ASU for providing 1 H NMR facility and Dr. Brian Cherry for his assistance. We thank Dr. Ryan P. Lively from the Georgia Institute of Technology for allowing the adsorption isotherm measurements in his laboratory and feedback on the manuscript. Funding Information: We gratefully acknowledge the National Science Foundation CAREER (Award #CBET-1254215) for supporting this work. We thank the LeRoy Eyring Center for Solid State Science at Arizona State University (ASU) for providing the XRD and AFM facility and the Bio-Design Institute at ASU for providing the contact angle facility. We would also like to show our gratitude to the Magnetic Resonance Research Center at ASU for providing 1H NMR facility and Dr. Brian Cherry for his assistance. We thank Dr. Ryan P. Lively from the Georgia Institute of Technology for allowing the adsorption isotherm measurements in his laboratory and feedback on the manuscript. Publisher Copyright: {\textcopyright} 2020",
year = "2020",
month = may,
day = "8",
doi = "10.1016/j.polymer.2020.122379",
language = "English (US)",
volume = "195",
journal = "Polymer",
issn = "0032-3861",
publisher = "Elsevier BV",
}