Dresden 2026 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 31: Responsive and Adaptive Systems

CPP 31.2: Vortrag

Mittwoch, 11. März 2026, 10:00–10:15, ZEU/0255

Secondary crosslinking of thermoresponsive microgels for smart microgel-based membranes — •Jonas Runge^1,2, Stefanie Uredat^1,2, Aditi Gujare^1,2, Domenico Truzzolillo², Julian Oberdisse², and Thomas Hellweg¹ — ¹Physical and Biophysical Chemistry, Bielefeld University, Germany — ²Laboratoire Charles Coulomb, Université Montpellier, France

Responsive microgels are crosslinked polymer networks of colloidal size, which undergo a so-called volume phase transition induced by a certain stimulus like e.g. temperature or pH. Temperature sensitive microgels undergo a strong decrease in size at the volume phase transition temperature (VPTT). Smart membranes are based on responsive polymers and allow to open pores triggered by an external stimulus [1]. Our project on smart microgel-based membranes (SmartBRANE) aims to incorporate an UV-crosslinker and form membranes by activating the UV-crosslinker [2]. The working temperature of low-temperature fuel cells is in the range of 80-100 °C. Since the VPTT of common acrylamides is close to the physiological temperature, we synthesized a hydrophilic acrylamide monomer (NIPMAMol) with an extrapolated VPTT of 85°C. In this work, we copolymerize NIPMAMol with NIPAM and the UV-crosslinker HMABP to increase the VPTT of the then formed membrane. The thermoresponsive properties of the microgels are characterized with PCS. The distribution of the UV-crosslinker within the microgels particles and the formed membrane is investigated with contrast-matching SANS experiments. [1]Runge,Gujare,Uredat, PCCP, 2024, 26, 2732.[2]Dirksen, RSC Advances, 2021, 11(36), 22014.

Keywords: Theromresponsive Microgels; Smart Membrane; Acrylamide; SANS; VPTT