Dresden 2026 – scientific programme
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BP: Fachverband Biologische Physik
BP 24: Biopolymers, Biomaterials and Bioinspired Functional Materials II (joint session CPP/BP)
BP 24.4: Talk
Wednesday, March 11, 2026, 17:45–18:00, ZEU/0255
Structural investigations using in situ SAXS on flexible bio-based vitrimeric carbon nanocomposites — •Sarathlal Koyiloth Vayalil1,2, Vaishnav B2, Viranchika Bijalwan2, Sravendra Rana2, and Ajay Gupta2 — 1Deutsches Elektronen Synchrotron DESY, Hamburg, Germany — 2Applied Science Cluster, UPES, Dehradun, India
In this work, in situ small- and ultra-small-angle X-ray scattering has been employed to investigate the real-time structural evolution of 3D-printed vitrimeric thiol-acrylate photopolymers and their carbon-based nanocomposites designed for healable strain-sensing and soft-robotic applications. Flexible bio-acrylate based vitrimers reinforced with graphene/CNT fillers at varying concentrations are examined to elucidate temperature-dependent phase segregation and enable direct visualization of nano- and microscale filler morphologies, their spatial distribution, and their evolution across key thermal transitions (Tg and Tv of the polymer matrix). The effects of the stress/strain and cyclic-thermal cycles on the filler aggregates affecting the composites conductivity in carbon-filled samples are also evaluated. These insights into nano- and microscale morphology, reinforcement, and conductive behavior help us understand the dynamic structure-property relationships governing vitrimer-based conductive networks
Keywords: SAXS; Bio polymer nanocomposites; Shape memory; 3D Printed films; Vitrimer