Ionic Liquid Hydrogel Composite Membranes (IL-HCMs)
In this work, novel hydrogel composites membranes comprising [2-(Methacryloyloxy)ethyl]dimethyl-(3-sulfopropyl)ammonium hydroxide as monomer, N,N-methylene bisacrylamide as cross-linker, and 1-butyl-3-methylimidazolium hexafluorophosphate as ionic liquid additive, have been developed. Ionic liquid h...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2019-05-01
|
| Series: | ChemEngineering |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2305-7084/3/2/47 |
| _version_ | 1818034422384951296 |
|---|---|
| author | Shabnam Majidi Salehi Rosangela Santagada Stefania Depietra Enrica Fontananova Efrem Curcio Gianluca Di Profio |
| author_facet | Shabnam Majidi Salehi Rosangela Santagada Stefania Depietra Enrica Fontananova Efrem Curcio Gianluca Di Profio |
| author_sort | Shabnam Majidi Salehi |
| collection | DOAJ |
| description | In this work, novel hydrogel composites membranes comprising [2-(Methacryloyloxy)ethyl]dimethyl-(3-sulfopropyl)ammonium hydroxide as monomer, N,N-methylene bisacrylamide as cross-linker, and 1-butyl-3-methylimidazolium hexafluorophosphate as ionic liquid additive, have been developed. Ionic liquid hydrogel composite membranes (IL-HCMs) were tested for membrane contactors applications, aiming to reduce surface hydrophobicity of the polypropylene support, to reduce wetting tendency due to interaction with hydrophobic foulants, while affecting salts rejection in desalination operation, because of the entrapment of ILs inside the porous mesh-like structure of the gel layer. Transmembrane flux comparable to the sole polypropylene support was observed for IL content > 1 wt.%. Furthermore, all IL membranes presented a larger rejection to sodium chloride than the PP support or the composites without ionic liquid inside. Although the overall transmembrane flux of IL-HCMs developed in this work is comparable with that of state of the art MD membranes, this study demonstrated that the strong hydrophilic hydrogel layer, with C.A. < 50° for IL content larger than 1 wt.%, serves as a stabilization coating, by providing the new media between the feed and the hydrophobic membrane surface, thus potentially controlling the diffusion of hydrophobic foulant molecules. This would result in a decrease in the membrane wetting and fouling aptitude. |
| first_indexed | 2024-12-10T06:38:54Z |
| format | Article |
| id | doaj.art-75fe661afb704dec9cefa481395bb0cb |
| institution | Directory Open Access Journal |
| issn | 2305-7084 |
| language | English |
| last_indexed | 2024-12-10T06:38:54Z |
| publishDate | 2019-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | ChemEngineering |
| spelling | doaj.art-75fe661afb704dec9cefa481395bb0cb2022-12-22T01:58:50ZengMDPI AGChemEngineering2305-70842019-05-01324710.3390/chemengineering3020047chemengineering3020047Ionic Liquid Hydrogel Composite Membranes (IL-HCMs)Shabnam Majidi Salehi0Rosangela Santagada1Stefania Depietra2Enrica Fontananova3Efrem Curcio4Gianluca Di Profio5National Research Council of Italy (CNR), Institute on Membrane Technology (ITM), Via P. Bucci c/o Università della Calabria Cubo 17/C, 87036 Rende (CS), ItalyNational Research Council of Italy (CNR), Institute on Membrane Technology (ITM), Via P. Bucci c/o Università della Calabria Cubo 17/C, 87036 Rende (CS), ItalyNational Research Council of Italy (CNR), Institute on Membrane Technology (ITM), Via P. Bucci c/o Università della Calabria Cubo 17/C, 87036 Rende (CS), ItalyNational Research Council of Italy (CNR), Institute on Membrane Technology (ITM), Via P. Bucci c/o Università della Calabria Cubo 17/C, 87036 Rende (CS), ItalyUniversity of Calabria (UNICAL), Department of Environmental and Chemical Engineering (DIATIC), Via P. Bucci Cubo 45/C, 87036 Rende (CS), ItalyNational Research Council of Italy (CNR), Institute on Membrane Technology (ITM), Via P. Bucci c/o Università della Calabria Cubo 17/C, 87036 Rende (CS), ItalyIn this work, novel hydrogel composites membranes comprising [2-(Methacryloyloxy)ethyl]dimethyl-(3-sulfopropyl)ammonium hydroxide as monomer, N,N-methylene bisacrylamide as cross-linker, and 1-butyl-3-methylimidazolium hexafluorophosphate as ionic liquid additive, have been developed. Ionic liquid hydrogel composite membranes (IL-HCMs) were tested for membrane contactors applications, aiming to reduce surface hydrophobicity of the polypropylene support, to reduce wetting tendency due to interaction with hydrophobic foulants, while affecting salts rejection in desalination operation, because of the entrapment of ILs inside the porous mesh-like structure of the gel layer. Transmembrane flux comparable to the sole polypropylene support was observed for IL content > 1 wt.%. Furthermore, all IL membranes presented a larger rejection to sodium chloride than the PP support or the composites without ionic liquid inside. Although the overall transmembrane flux of IL-HCMs developed in this work is comparable with that of state of the art MD membranes, this study demonstrated that the strong hydrophilic hydrogel layer, with C.A. < 50° for IL content larger than 1 wt.%, serves as a stabilization coating, by providing the new media between the feed and the hydrophobic membrane surface, thus potentially controlling the diffusion of hydrophobic foulant molecules. This would result in a decrease in the membrane wetting and fouling aptitude.https://www.mdpi.com/2305-7084/3/2/47advanced separationsdesalinationhydrogel composite membranesionic liquids membranesmembrane distillation |
| spellingShingle | Shabnam Majidi Salehi Rosangela Santagada Stefania Depietra Enrica Fontananova Efrem Curcio Gianluca Di Profio Ionic Liquid Hydrogel Composite Membranes (IL-HCMs) ChemEngineering advanced separations desalination hydrogel composite membranes ionic liquids membranes membrane distillation |
| title | Ionic Liquid Hydrogel Composite Membranes (IL-HCMs) |
| title_full | Ionic Liquid Hydrogel Composite Membranes (IL-HCMs) |
| title_fullStr | Ionic Liquid Hydrogel Composite Membranes (IL-HCMs) |
| title_full_unstemmed | Ionic Liquid Hydrogel Composite Membranes (IL-HCMs) |
| title_short | Ionic Liquid Hydrogel Composite Membranes (IL-HCMs) |
| title_sort | ionic liquid hydrogel composite membranes il hcms |
| topic | advanced separations desalination hydrogel composite membranes ionic liquids membranes membrane distillation |
| url | https://www.mdpi.com/2305-7084/3/2/47 |
| work_keys_str_mv | AT shabnammajidisalehi ionicliquidhydrogelcompositemembranesilhcms AT rosangelasantagada ionicliquidhydrogelcompositemembranesilhcms AT stefaniadepietra ionicliquidhydrogelcompositemembranesilhcms AT enricafontananova ionicliquidhydrogelcompositemembranesilhcms AT efremcurcio ionicliquidhydrogelcompositemembranesilhcms AT gianlucadiprofio ionicliquidhydrogelcompositemembranesilhcms |