On The Multiscale Structure and Morphology of PVDF‐HFP@MOF Membranes in The Scope of Water Remediation Applications
Year: 2023
Type: article
Abstract: Poly(vinylidene fluoride‐co‐hexafluoropropylene) (PVDF‐HFP) is a highly versatile polymer used for water remediation due to its chemical robustness and processability. By incorporating metal‐organic frameworks (MOFs) into PVDF‐HFP membranes, the material can gain metal‐adsorption properties. It is well known that the effectiveness of these composites removing heavy metals depends on the MOF's chemical encoding and the extent of encapsulation within the polymer. In this study, it is examined how the micro to nanoscale structure of PVDF‐HFP@MOF membranes influences their adsorption performance for CrVI. To this end, the micro‐ and nanostructure of PVDF‐HFP@MOF membranes are thoroughly studied by a set of complementary techniques. In particular, small‐angle X‐ray and neutron scattering allow to precisely describe the nanostructure of the polymer‐MOF complex systems, while scanning microscopy and mercury porosimetry give a clear insight into the macro and mesoporosity of the system. By correlating nanoscale structural features with the adsorption capacity of the MOF nanoparticles, different degrees of full encapsulation‐based on the PVDF‐HFP processing and structuration from the macro to nanometer scale are observed. Additionally, the in situ functionalization of MOF nanoparticles with cysteine is investigated to enhance their adsorption toward HgII. This functionalization enhanced the adsorption capacity of the MOFs from 8 to 30 mg·g−1.
Source: Advanced Materials Interfaces
Institutions: University of the Basque Country, Basque Center for Materials, Applications and Nanostructures, Rutherford Appleton Laboratory, Science and Technology Facilities Council, ISIS Neutron and Muon Source, Institute for Energy Security and Environmental Safety, HUN-REN Centre for Energy Research, Graz University of Technology, Instituto de Ciência e Inovação para a Bio-Sustentabilidade, University of Minho, Ikerbasque
Language: English
Subfield: Inorganic Chemistry
Field: Chemistry
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $3,100
Funders: TU Graz, Internationale Beziehungen und Mobilitätsprogramme, European Commission, Eusko Jaurlaritza, Euskal Herriko Unibertsitatea, Karl-Franzens-Universität Graz, Bundesministerium für Bildung, Wissenschaft und Forschung, Fundação para a Ciência e a Tecnologia, Agencia Estatal de Investigación, NextGenerationEU
Awards: G120905174, G1272927172, G1334979847, G1719462714, G1990805107, G2975900969, G3087826134, G3482614722, G356932965, G357246561, G4002810295, G4215773833, G434337789, G4601668021, G484457457, Centro de Física das Universidades do Minho e do Porto, G531036588, G5454278309, G5693547746, G6554487095, G666971114, Baterias impressas avançadas amigas do ambiente para dispositivos portáteis, G7973569918, G8186726090, International Network on Ionic Liquid Deep Eutectic Solvent Based Metal Organic Frameworks Mixed Matrix Membranes.
OpenAlex ID: W4385274366