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Periodic Bicontinuous Structures Formed on the Top Surface of Asymmetric Triblock Terpolymer Thick Films

Karim Aissou 1 Muhammad Mumtaz 2 Nils Demazy 2 Gilles Pécastaings 3 Guillaume Fleury 4 Georges Hadziioannou 4
1 IEM - Institut Européen des membranes
2 LCPO - Laboratoire de Chimie des Polymères Organiques
3 CRPP - Centre de recherches Paul Pascal
4 THEME 3
LCPO - Laboratoire de Chimie des polymères organiques
Abstract : The combination of the nonsolvent-induced phase separation (NIPS) process with a solvent vapor annealing (SVA) treatment is used to produce asymmetric and hydrophobic thick films having different long-range ordered network nanostructures, which are inaccessible via currently available membrane fabrication methods. We show that the disordered phase generated by NIPS on the material top surface can be transformed into a highly ordered bicontinuous network nanostructure during the SVA process without disrupting the substructure morphology. For instance, by using a straightforward blending approach, either a triply periodic alternating diamond (D-A) structure or a core-shell perforated lamellar (PL) phase was demonstrated on the skin layer of fully hydrophobic poly(1,1-dimethyl silacyclobutane)-block-polystyrene-block-poly(methyl methacrylate) (PDMSB-b-PS-b-PMMA) thick films. Such a material fabrication method, enabling the formation of a sponge-like substructure topped by a network phase having an excellent long-range order, provides an appealing strategy to facilitate the manufacture of next-generation membranes at large scale since these bicontinuous morphologies obviate the need of the nanochannel alignment.
Keywords : The combination of the nonsolvent-induced phase separation (NIPS) process with a solvent vapor annealing (SVA) treatment is used to produce asymmetric and hydrophobic thick films having different long-range ordered network nanostructures, which are inaccessible via currently available membrane fabrication methods. We show that the disordered phase generated by NIPS on the material top surface can be transformed into a highly ordered bicontinuous network nanostructure during the SVA process without disrupting the substructure morphology. For instance, by using a straightforward blending approach, either a triply periodic alternating diamond (D-A) structure or a core-shell perforated lamellar (PL) phase was demonstrated on the skin layer of fully hydrophobic poly(1, 1-dimethyl silacyclobutane)-block-polystyrene-block-poly(methyl methacrylate) (PDMSB-b-PS-b-PMMA) thick films. Such a material fabrication method, enabling the formation of a sponge-like substructure topped by a network phase having an excellent long-range order, provides an appealing strategy to facilitate the manufacture of next-generation membranes at large scale since these bicontinuous morphologies obviate the need of the nanochannel alignment.
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https://hal.archives-ouvertes.fr/hal-02323100
Contributor : Karim Aissou <>
Submitted on : Monday, October 21, 2019 - 4:41:35 PM
Last modification on : Thursday, November 5, 2020 - 3:18:50 PM

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UNIV-BORDEAUX | CRPP | CNRS | INC-CNRS | CHIMIE | UNIV-MONTPELLIER | IEM | LCPO

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Karim Aissou, Muhammad Mumtaz, Nils Demazy, Gilles Pécastaings, Guillaume Fleury, et al.. Periodic Bicontinuous Structures Formed on the Top Surface of Asymmetric Triblock Terpolymer Thick Films. ACS Macro Letters, Washington, D.C : American Chemical Society, 2019, 8 (8), pp.923-930. ⟨10.1021/acsmacrolett.9b00403⟩. ⟨hal-02323100⟩

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