Research output: Contribution to journal › Article › peer-review
Covalent and Selective Grafting of Polyethylene Glycol Brushes at the Surface of ZIF-8 for the Processing of Membranes for Pervaporation. / Benzaqui, Marvin ; Semino, Rocio; Carn, Florent; Tavares, Sergio Rodrigues ; Menguy, Nicolas ; Giménez-Marqués, Mónica ; Bellido, Elena ; Horcajada, Patricia ; Berthelot, Thomas ; Kuzminova, Anna I. ; Dmitrenko, Maria E. ; Penkova, Anastasia V. ; Roizard, Denis; Serre, Christian ; Maurin, Guillaume ; Steunou, Nathalie .
In: ACS Sustainable Chemistry and Engineering, Vol. 7, No. 7, 01.04.2019, p. 6629-6639.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Covalent and Selective Grafting of Polyethylene Glycol Brushes at the Surface of ZIF-8 for the Processing of Membranes for Pervaporation
AU - Benzaqui, Marvin
AU - Semino, Rocio
AU - Carn, Florent
AU - Tavares, Sergio Rodrigues
AU - Menguy, Nicolas
AU - Giménez-Marqués, Mónica
AU - Bellido, Elena
AU - Horcajada, Patricia
AU - Berthelot, Thomas
AU - Kuzminova, Anna I.
AU - Dmitrenko, Maria E.
AU - Penkova, Anastasia V.
AU - Roizard, Denis
AU - Serre, Christian
AU - Maurin, Guillaume
AU - Steunou, Nathalie
PY - 2019/4/1
Y1 - 2019/4/1
N2 - The so-called Graftfast reaction in water and at room temperature (RT) was applied to graft polyethylene glycol (PEG) at the surface of the microporous zeolitic imidazolate framework ZIF-8 nanoparticles (NPs) using acrylPEG of different chain lengths (480 Da and 5 kDa). In comparison to nonmodified ZIF-8 NPs, both chemical and colloidal stabilities of PEGylated ZIF-8 NPs are significantly enhanced in water. A series of colloidal complex fluids by mixing PEG grafted ZIF-8 (i.e., PEG-g-ZIF-8) NPs with different amounts of poly(vinyl alcohol) (PVA) was prepared and characterized by advanced characterization tools such as dynamic light scattering (DLS) and small-angle X-ray scattering (SAXS) thereby showing their long-term colloidal stability. Finally, dense and supported mixed matrix membranes were cast from PEG-g-ZIF-8/PVA solutions and have shown high performance in isopropanol (IPA) dehydration by pervaporation. The permeation flux of the supported MMM (i.e., 0.091 kg/(m2·h)) is 11 times higher than that of the pure PVA membrane and these MMMs present a high separation factor (i.e., 7326). These transport properties are presumably due to the molecular sieving effects induced by ZIF-8 and the good interfacial properties of the membrane. The computational exploration of the ZIF-8/PVA and PEG/PVA interfaces provides a microscopic scale explanation for the enhanced compatibility of PVA with the PEGylated MOF when compared to that for the composite based on the bare ZIF-8 as a filler.
AB - The so-called Graftfast reaction in water and at room temperature (RT) was applied to graft polyethylene glycol (PEG) at the surface of the microporous zeolitic imidazolate framework ZIF-8 nanoparticles (NPs) using acrylPEG of different chain lengths (480 Da and 5 kDa). In comparison to nonmodified ZIF-8 NPs, both chemical and colloidal stabilities of PEGylated ZIF-8 NPs are significantly enhanced in water. A series of colloidal complex fluids by mixing PEG grafted ZIF-8 (i.e., PEG-g-ZIF-8) NPs with different amounts of poly(vinyl alcohol) (PVA) was prepared and characterized by advanced characterization tools such as dynamic light scattering (DLS) and small-angle X-ray scattering (SAXS) thereby showing their long-term colloidal stability. Finally, dense and supported mixed matrix membranes were cast from PEG-g-ZIF-8/PVA solutions and have shown high performance in isopropanol (IPA) dehydration by pervaporation. The permeation flux of the supported MMM (i.e., 0.091 kg/(m2·h)) is 11 times higher than that of the pure PVA membrane and these MMMs present a high separation factor (i.e., 7326). These transport properties are presumably due to the molecular sieving effects induced by ZIF-8 and the good interfacial properties of the membrane. The computational exploration of the ZIF-8/PVA and PEG/PVA interfaces provides a microscopic scale explanation for the enhanced compatibility of PVA with the PEGylated MOF when compared to that for the composite based on the bare ZIF-8 as a filler.
KW - MOFs
KW - Membranes
KW - Pervaporation
KW - Poly(vinyl alcohol)
KW - Surface modification
UR - http://www.scopus.com/inward/record.url?scp=85063693957&partnerID=8YFLogxK
UR - http://www.mendeley.com/research/covalent-selective-grafting-polyethylene-glycol-brushes-surface-zif8-processing-membranes-pervaporat
U2 - 10.1021/acssuschemeng.8b05587
DO - 10.1021/acssuschemeng.8b05587
M3 - Article
VL - 7
SP - 6629
EP - 6639
JO - ACS Sustainable Chemistry and Engineering
JF - ACS Sustainable Chemistry and Engineering
SN - 2168-0485
IS - 7
ER -
ID: 45516186