Functionalized MOF-Derived Nanoporous Carbon as Compatible Nanofiller to Fabricate Defect-Free PDMS-Based Mixed Matrix Pervaporation Membranes

Abstract

Metal–organic framework (MOF)-based polydimethylsiloxane mixed matrix membranes applied for alcohol recovery with high permeability and selectivity are drawing more and more attention. However, the design and fabrication of high-quality and stable MOF-based mixed matrix membrane for pervaporation are still a big challenge. Herein, PDMS functionalized MOF-derived nanoporous carbon (P-ZNC) was first explored as compatible nanofiller to mutually blend with polydimethylsiloxane on PVDF substrate to fabricate defect-free mixed matrix membranes via dip-coating and thermal cross-linkng. Induced by UV illumination, hydrophobic modification of MOF-derived nanoporous carbon was successfully realized under mild conditions within one step, simplifying the operation step. By using this facile strategy, we can not only solve the existing problem of agglomeration, but also covalently cross-link MOF derivative with polymeric matrix and effectively eliminate the interface defect between polymer and nanoparticles without any extra steps. The method also gives a good level of generality for the synthesis of versatile stable nanoporous MOF-derived carbon-based mixed matrix membranes on various supports. The prepared PDMS/P-ZNC with commendable structures possessed excellent separation performance in low concentration n -butanol recovery and had a good balance between permeance, selectivity, and stability.

N‐Containing Carbons Derived from Microporous Coordination Polymers for Use in Post‐Combustion Flue Gas Capture

“…In this regard, several reports have demonstrated that the use of MOFs or MOF‐derived carbons in mixed‐matrix membranes enhances not only the bulk porosity, but also strongly reduces the membrane tortuosity. [ 75–78 ]…”

“…Thus, it is plausible to assume that the ordered MOF structure could also lead to carbons having more ordered pores and hence less tortuosity and more favorable mass transfer during breakthrough for 2Br-phen@Co(2-MIM) 2 -c. To our knowledge, although such comparisons have not been made between adsorbents in the powder form, similar theories have been posed in the literature. [75][76][77][78] For instance, in the field of membranes it is desirable to increase porosity and reduce tortuosity, which reduces the resistance of the permeate. In this regard, several reports have demonstrated that the use of MOFs or MOF-derived carbons in mixed-matrix membranes enhances not only the bulk porosity, but also strongly reduces the membrane tortuosity.…”

ZIF-67-Derived NiCo-Layered Double Hydroxide@Carbon Nanotube Architectures with Hollow Nanocage Structures as Enhanced Electrocatalysts for Ethanol Oxidation Reaction

“…The ZIF-67-template-derived NiCo-layered double hydroxide (NiCo-LDH- y , y = quality of Ni(NO 3 ) 2 ·6H 2 O, y = 50, 100, and 150) was fabricated through the reported method [ 28 ]. In the typical process, added ZIF-67-1/4 (30 mg) was dispersed evenly in 30 mL ethanol, following which 50, 100, and 150 mg Ni(NO 3 ) 2 ·6H 2 O were added in.…”

“…As a kind of mature metal–organic skeleton, zeolite imidazolate frameworks (ZIFs) have been often used as providers of framework templates and metal feedstock for manufacturing energy storage and intermediate materials [ 25 , 26 , 27 , 28 , 29 ]. Especially, ZIF-67 composited by 2-methylimidazole and Co ions can supply trivalent ions and support frames to prepare LDH materials [ 30 , 31 ].…”

Nano-Structured Carbon: Its Synthesis from Renewable Agricultural Sources and Important Applications

“…[ 18 ]. Recently, MOF-based nonporous carbon reported with cation exchange membrane and compatible nanofiller to fabricate defect free matrix pervaporation membranes were discussed [ 19 , 20 , 21 ].…”