Details

Autor(en) / Beteiligte

• Xu, Yi Ming
• Japip, Susilo
• Chung, Tai-Shung

Titel

Mixed matrix membranes with nano-sized functional UiO-66-type MOFs embedded in 6FDA-HAB/DABA polyimide for dehydration of C1-C3 alcohols via pervaporation

Ist Teil von

• Journal of membrane science, 2018-03, Vol.549, p.217-226

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2018

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• This study demonstrated an effective method to enhance both the normalized flux and separation factor by molecularly designing mixed matrix membranes (MMMs) consisting of porous UiO-66-NH2 nanoparticles and 6FDA-HAB/DABA polyimide. To investigate the effects of functional groups on UiO-66 particles on alcohol dehydration, MMMs containing (1) UiO-66-NH2 nanoparticles with a particle size of 80–90nm, (2) UiO-66 with a particle size of 90–110nm and (3) UiO-66-F4 with a particle size of 90–130nm were fabricated and compared for alcohol dehydration. Three alcohol dehydration systems; namely, methanol/water, ethanol/water and isopropanol/water were studied. Results showed that UiO-66-NH2 based MMMs have superior separation performance among these three MMMs because the hydrophilic amino-functional groups can facilitate water transport. Incorporation of UiO-66-NH2 nanoparticles can greatly improve both the normalized flux and separation factor simultaneously if the particle loading is within the range of 0–20wt%. Due to the good compatibility between UiO-66-NH2 particles and the 6FDA-HAB/DABA polyimide resulting from the intermolecular bonding among the amine and imide groups, the UiO-66-NH2 based MMMs exhibited stable isopropanol dehydration performance in uninterrupted 200-h tests. The excellent alcohol dehydration performance of UiO-66-NH2 based MMMs opens up their potential for alcohol dehydration via pervaporation. [Display omitted] •MMMs consisting of polyimide and UiO-66-type MOFs have been successfully prepared.•UiO-66-NH2 based MMMs have excellent alcohol dehydration performance.•UiO-66-NH2 based MMMs show stable long term performance of isopropanol dehydration.•Hydrophilic amino-functional groups in UiO-66-NH2 can facilitate water transport.•Adding UiO-66-NH2 greatly enhances both normalized flux and separation factor.