Invited seminars – 2024 –
Starting 2024, LCMCP invites renowned experts to share their knowledge in the field of Soft Matter, a new inter-Team Transverse Axis.
Lectures will occur approximately once a month and are open (in person and online) to anyone interested. The next scheduled seminars are
LCMCP invites renowned experts to share their knowledge in the field of soft matter. Lectures will occur approximately once a month and are open to anyone interested. The next scheduled seminars are
September 2024
Dr. Samanvaya Srivastava, Ass. Prof.
University of California, Los Angeles, CA, USA
Polyelectrolyte Complex Scaffoldings for Wet Adhesives and 3D Bioprinting Inks
19/09/2024 – 10h45
AMPHI DURAND, Bat. Esclangon
Campus Pierre et Marie Curie
Sorbonne Université
4, Place Jussieu Paris 5
Online Link
Abstract
Photocrosslinkable precursors (small molecules or polymers) undergo rapid crosslinking upon photoirradiation, forming covalently crosslinked hydrogels. The spatiotemporally controlled crosslinking, which can be achieved in situ, encourages the utility of photocrosslinked hydrogels in biomedicine as bioadhesives, bioprinting inks, and extracellular matrix mimics. However, the low viscosity of the precursor solutions results in handling difficulties owing to unwanted flows and dilution and compromises the strength of the photocrosslinked hydrogels. In this talk, I will introduce oppositely charged triblock polyelectrolytes as additives for precursor solutions that transform the precursor solution into a self-assembled polyelectrolyte complex (PEC) hydrogel with enhanced shear strength and viscosity, providing interim protection against precursor dilution and mitigating secondary flows. The PEC network also augments the properties of the photocrosslinked hydrogels. Crosslinking of the precursors upon photoirradiation results in the formation of interpenetrating polymer network hydrogels (PEC/covalent IPN hydrogels), comprising PEC and covalently-linked networks, that exhibit shear moduli exceeding the linear combination of the moduli of the constituent networks and overcome the tensile strength–extensibility tradeoff that restricts the performance of covalently-linked hydrogels. The reinforcement approach will be shown to be broadly compatible with photocrosslinkable precursors, not requiring any modification of the precursors, and introduce minimal processing steps, paving the way for broader translation of photocrosslinkable materials for biomedical applications.
Biography
Samanvaya is an Associate Professor of Chemical and Biomolecular Engineering at UCLA. He completed his undergraduate and master’s degrees from IIT Kanpur and his Ph.D. from Cornell University, all in Chemical Engineering. At IIT Kanpur, he worked with Prof. Ashutosh Sharma on instabilities in thin films. At Cornell, he worked with Prof. Lynden Archer on the structure and properties of polymer nanocomposites and nanoparticle dispersions. After his Ph.D., Samanvaya pursued postdoctoral research on polyelectrolyte solutions and complexes with Prof. Matthew Tirrell at The University of Chicago. Samanvaya’s current research interests are in investigating the influence of diverse intermolecular interactions on material structure and properties, with a broader aim to combine this fundamental understanding with molecular engineering and self-assembly processes to improve materials design. He has published over 40 research articles and has received several awards, including the Austin Hooey Graduate Research Excellence Recognition Award at Cornell University, the RSC Researcher Mobility Grant, AIChE 35 under 35 award, a Scialog fellowship, the NSF CAREER Award, and the ACS PMSE Young Investigator Award. Lab website: https://www.srivastava-lab.net/
November 2024
Dr. Peter Schmiedel, Head of Physical Chemistry Research
Henkel Consumer Brand, Henkel AG & Co. KGaA, Duesseldorf, Germany
Title To Be Announced
18-19/11/2024 – 11h
UFR de Chimie, Salle 101
Tour 32-42, Campus Pierre et Marie Curie
Sorbonne Université
4, Place Jussieu Paris 5
Online Link
Past seminars
March 2024
Dr. Marc-Antoine Fardin
Université Paris-Cité, Paris
Scaling laws & dimensional analysis in Soft Matter
06/03/2024 – 11h
Video of the presentation
Paper 1, Paper 2
April 2024
Prof. Cosima Stubenrauch
University of Stuttgart, Stuttgart, Germany
Surfactant-Based Lyotropic Liquid Crystal Gels – The Interplay between Anisotropic Order & Gel Formation
03/04/2024 – 14h
UFR de Chimie, salle 101
Tour 32-42, Campus Pierre et Marie Curie
Sorbonne Université
4, Place Jussieu Paris 5
May 2024
Prof. Atul Parikh
Biomedical Engineering, University of California, Davis, CA, USA
Institute for Digital Molecular Analytics & Science, NTU, Singapore
Mixing Water, Tranducing Energy, Shaping Membranes
24/05/2024 – 11h
UFR de Chimie, salle 101
Tour 32-42, Campus Pierre et Marie Curie
Campus Pierre et Marie Curie
Sorbonne Université
4, Place Jussieu Paris 5
Video of the presentation
June 2024
Dr. Seunghyun Sim, Ass. Prof.
University of California, Irvine, CA, USA
Molecular Assembly of Living Materials
24/06/2024 – 10h
UFR de Chimie, Salle 101
Tour 32-42, Campus Pierre et Marie Curie
Sorbonne Université
4, Place Jussieu Paris 5
Dr. Thibaut Divoux
ENS, Lyon
Unveiling Hydrophobic-Driven Gelation: Exploring the case of Carboxymethylcellulose (CMC) Hydrogels
24/06/2024 – 11h
UFR de Chimie, Salle 101
Tour 32-42, Campus Pierre et Marie Curie
Sorbonne Université
4, Place Jussieu Paris 5
Video of the presentation