Details

Autor(en) / Beteiligte

• Yin, Huidan
• Cay-Durgun, Pinar
• Lai, Tianmiao
• Zhu, Guanghui
• Engebretson, Kiah
• Setiadji, Regina
• Green, Matthew D.
• Lind, Mary Laura

Titel

Effect of ZIF-71 ligand-exchange surface modification on biofuel recovery through pervaporation

Ist Teil von

• Polymer (Guilford), 2020-05, Vol.195, p.122379, Article 122379

Ort / Verlag

Kidlington: Elsevier Ltd

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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. [Display omitted] •ZIF-71 particles were modified through the solvent-assisted linker exchange (SALE).•The particles embedded in polydimethylsiloxane membranes via condensation cure method.•The mixed matrix membranes were tested for removal of alcohol from dilute aqueous solutions.•Ligand-exchanged particles embedded membranes demonstrated enhanced particle dispersion in the polymer matrix.