AISSOU, Karim; MUMTAZ, Muhammad; BOUZIT, Hana; PÉCASTAINGS, Gilles; PORTALE, Giuseppe; FLEURY, Guillaume; HADZIIOANNOU, Georges

doi:10.1021/acs.macromol.9b00572

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AISSOU, Karim
Institut Européen des membranes [IEM]

MUMTAZ, Muhammad
Laboratoire de Chimie des Polymères Organiques [LCPO]

BOUZIT, Hana
Laboratoire de Chimie des Polymères Organiques [LCPO]

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Macromolecules. 2019, vol. 52, n° 12, p. 4413-4420

American Chemical Society

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Asymmetric poly(1,1-dimethyl silacyclobutane)-block-polystyrene-block-poly(2-vinyl pyridine) (PDMSB-b-PS-b-P2VP) thick films, consisting of a spongelike substructure topped by a nanostructured dense top layer, were produced by combining a fast self-assembly of the triblock terpolymer chains with nonsolvent-induced phase separation (referred as SNIPS). A controlled evolution of the thickness and morphology of the nanostructured top layer was achieved upon solvent vapor annealing (SVA). For instance, the sub-100 nm thick square array morphology generated by SNIPS is transformed into a 1.5 mu m thick core-shell perforated lamellar (PL) structure when exposed to a chloroform (CHCl3) vapor for 3 h. A PL phase having highly ordered continuous P2VP nanochannels can be envisioned as an appealing morphology for membrane applications, since such a network structure formed on asymmetric PDMSB-b-PS-b-P2VP thick films obviates the need for alignment. Monoliths entirely composed of the bicontinuous PL structure were also produced by increasing the duration of the SVA treatment (18 h, CHCl3)< Leer menos

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BLOCK-COPOLYMER MEMBRANES

ARCHIMEDEAN TILINGS

MORPHOLOGY

PHASE

ULTRAFILTRATION

LAMELLAE

ARRAYS

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Bicontinuous Network Nanostructure with Tunable Thickness Formed on Asymmetric Triblock Terpolymer Thick Films

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