TY - JOUR
T1 - Ionic Liquids As Self-Assembly Guide for the Formation of Nanostructured Block Copolymer Membranes
AU - Madhavan, Poornima
AU - Sougrat, Rachid
AU - Behzad, Ali Reza
AU - Peinemann, Klaus-Viktor
AU - Nunes, Suzana Pereira
N1 - KAUST Repository Item: Exported on 2020-10-01
PY - 2015/5/2
Y1 - 2015/5/2
N2 - Nanostructured block copolymer membranes were manufactured by water induced phase inversion, using ionic liquids (ILs) as cosolvents. The effect of ionic liquids on the morphology was investigated, by using polystyrene-b-poly(4-vinyl pyridine) (PS-b-PV4P) diblock as membrane copolymer matrix and imidazolium and pyridinium based ILs. The effect of IL concentration and chemical composition was evident with particular interaction with P4VP blocks. The order of block copolymer/ILs solutions previous to the membrane casting was confirmed by cryo scanning electron microscopy and the morphologies of the manufactured nanostructured membranes were characterized by transmission and scanning electron microscopy. Non-protic ionic liquids facilitate the formation of hexagonal nanoporous block copolymer structure, while protic ILs led to a lamella-structured membrane. The rheology of the IL/block copolymer solutions was investigated, evaluating the storage and loss moduli. Most membranes prepared with ionic liquid had higher water flux than pure block copolymer membranes without additives.
AB - Nanostructured block copolymer membranes were manufactured by water induced phase inversion, using ionic liquids (ILs) as cosolvents. The effect of ionic liquids on the morphology was investigated, by using polystyrene-b-poly(4-vinyl pyridine) (PS-b-PV4P) diblock as membrane copolymer matrix and imidazolium and pyridinium based ILs. The effect of IL concentration and chemical composition was evident with particular interaction with P4VP blocks. The order of block copolymer/ILs solutions previous to the membrane casting was confirmed by cryo scanning electron microscopy and the morphologies of the manufactured nanostructured membranes were characterized by transmission and scanning electron microscopy. Non-protic ionic liquids facilitate the formation of hexagonal nanoporous block copolymer structure, while protic ILs led to a lamella-structured membrane. The rheology of the IL/block copolymer solutions was investigated, evaluating the storage and loss moduli. Most membranes prepared with ionic liquid had higher water flux than pure block copolymer membranes without additives.
UR - http://hdl.handle.net/10754/552119
UR - http://linkinghub.elsevier.com/retrieve/pii/S0376738815003671
UR - http://www.scopus.com/inward/record.url?scp=84937010586&partnerID=8YFLogxK
U2 - 10.1016/j.memsci.2015.04.036
DO - 10.1016/j.memsci.2015.04.036
M3 - Article
SN - 0376-7388
VL - 492
SP - 568
EP - 577
JO - Journal of Membrane Science
JF - Journal of Membrane Science
ER -