Studying of the local crystalline structure of polymer micelles at solid-liquid interfaces under shear
Gels consisting of polymer micelles offer various possible applications in the fields of tissue engineering and drug delivery. A model example for such a system is Pluronic F127 micelles in aqueous solutions. It forms cubic crystal lattices affected by interfaces and shear forces. This experiment investigates the influence of these parameters on the ordering. Three surfaces with different energies will be prepared to study micellar behavior under shear and temperature variations to investigate their influence on micellar ordering. Grazing incidence SANS will enable us to determine scattering length density profiles. A significant finding from previous studies is the reduction in the 111 Bragg peak intensity, even at low shear rates, challenging conventional expectations from bulk studies. It is suggested that shear induces wavy lattice planes, leading to decreased contrast in scattering length density along the surface normal and increased diffuse scattering. GISANS is well-suited to investigate these questions since it can probe the local crystalline structure close to interfaces.
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GUNTER Tim; Javier Carrascosa-Tejedor; GUTFREUND Philipp; PORCAR Lionel; P. Sánchez-Puga; Vagias, Apostolos and WOLFF Maximilian. (2024). Studying of the local crystalline structure of polymer micelles at solid-liquid interfaces under shear. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.DIR-344
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