The purpose of this work is to create a porous polyvinyl-chloride (PVC) membrane able of sequestering metal ions in solution avoiding the use of plasticizers that can affect ionophores distribution and performance. In the sensor here developed, the distribution of ionophore (i.e. protoporphyrin IX) is no longer due to plasticizers but to microcavities that allow it to easily penetrate inside the material. Microporosity was obtained adding water soluble components (Poly vinyl alcohol or NaHCO3) as blends or crystals to PVC. Only blends show a uniformly distributed porosity (≈2 µm), that allows a rapid exchange thanks to the increased active surface. Membranes were characterized by Infrared Spectroscopy (IR), Differential Scanning Calorimetry (DSC) and Scanning Electron Microscopy (SEM). The effective complexion with metal ions was verified by IR and UV Spectroscopy. © 2020 Elsevier B.V.
Consumi, M., Leone, G., Bonechi, C., Tamasi, G., Lamponi, S., Donati, A., et al. (2020). Plasticizers free polyvinyl chloride membrane for metal ions sequestering. INORGANIC CHEMISTRY COMMUNICATIONS, 119, 1-8 [10.1016/j.inoche.2020.108100].
Plasticizers free polyvinyl chloride membrane for metal ions sequestering
Consumi M.
;Leone G.
;Bonechi C.;Tamasi G.;Lamponi S.;Donati A.;Rossi C.;Magnani A.
2020-01-01
Abstract
The purpose of this work is to create a porous polyvinyl-chloride (PVC) membrane able of sequestering metal ions in solution avoiding the use of plasticizers that can affect ionophores distribution and performance. In the sensor here developed, the distribution of ionophore (i.e. protoporphyrin IX) is no longer due to plasticizers but to microcavities that allow it to easily penetrate inside the material. Microporosity was obtained adding water soluble components (Poly vinyl alcohol or NaHCO3) as blends or crystals to PVC. Only blends show a uniformly distributed porosity (≈2 µm), that allows a rapid exchange thanks to the increased active surface. Membranes were characterized by Infrared Spectroscopy (IR), Differential Scanning Calorimetry (DSC) and Scanning Electron Microscopy (SEM). The effective complexion with metal ions was verified by IR and UV Spectroscopy. © 2020 Elsevier B.V.
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https://hdl.handle.net/11365/1116328