[Todos] seminario conjunto IFLP-INIFTA

[Marcelo Ceolin]

Estimadas/os,



Quedan todas/os invitadas/os al próximo seminario a realizarse el *jueves
10 de octubre a las 12hs*.



El mismo estará a cargo del *Prof. Dr. Marcus Müller* del Inst. de Física
Teórica de la Universidad de Göttingen.



Su charla se titula:

*Membrane Fabrication via EISA and NIPS: Insights into the Spatiotemporal
Evolution from Computer Simulation*



Se envía a continuación un breve resumen:



SNIPS, a combination of evaporation-induced self-assembly (EISA) and
nonsolvent-induced phase separation (NIPS) of copolymer solutions, offers a
bottom-up approach for fabricating integral-asymmetric, isoporous block
copolymer membranes. During EISA, a self-assembled top layer of
perpendicular cylindrical domains forms, imparting selectivity for
ultrafiltration and water purification. Upon immersion in a nonsolvent
bath, NIPS creates a spongy, macroporous support structure from the same
material that provides mechanical stability.

Designing membranes with desired characteristics (e.g., copolymer
chemistry, isoporous layer thickness, thermal and mechanical stability) for
specific applications remains a challenge due to the nonequilibrium nature
of the SNIPS process. This process is driven by complex physical phenomena,
including solvent evaporation, self-assembly, solvent-nonsolvent exchange,
macrophase separation, and glassy arrest.

To optimize permeability and selectivity and guide rational design, we
employ GPU-accelerated particle-based and continuum simulations to model
the entire SNIPS process. These simulations identify a process window for
successful membrane fabrication and elucidate the interplay between
structural, thermodynamic, kinetic, and process variables. We find that (i)
minor incompatibility between the copolymer’s matrix-forming block and the
nonsolvent, (ii) glassy arrest at lower polymer concentrations, or (iii)
greater dynamic contrast between polymer and solvent leads to a spongy,
tortuous substructure. This simulation approach offers a platform for
rational membrane design and guides experimental efforts to optimize
permeability and selectivity.



El evento tendrá lugar en el *auditorio ¨Prof. Dr. Luis N. Epele¨ del IFLP*,
sito en la diagonal 113 entre 63 y 64.

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Prof. Dr. Marcelo Ceolin
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
UNLP-CONICET
Diagonal 113 y 64
Casilla de Correo 16 (sucursal 4)
(B1906ZAA) La Plata
Argentina

Tel: +54-221-4257291 or 4257430 (int:173 or 162)
Fax: +54-221-4254642
e-mail: mceolin en inifta.unlp.edu.ar (work) or mrceolin en gmail.com (private)
WEB: softmatter.quimica.unlp.edu.ar
<https://softmatter.quimica.unlp.edu.ar/?page_id=5823> (main) or
www.inifta.unlp.edu.ar
<http://www.inifta.unlp.edu.ar/quimica_de_la_materia_blanda>
ORCID ID: ORCID ID 0000-0002-2385-7803
<https://orcid.org/0000-0002-2385-7803>
Google Scholar: Google Scholar
<https://scholar.google.com.ar/citations?user=7LTN_j4AAAAJ&hl=es>
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