Berlin 2018 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 64: Nanostructures, Nanostructuring and Nanosized Soft Matter II

CPP 64.1: Vortrag

Donnerstag, 15. März 2018, 09:30–09:45, PC 203

Spray deposition of conducting composite films studied with in situ GISAXS — •Volker Körstgens¹, Senlin Xia¹, Matthias Schwartzkopf², Calvin J. Brett^2,3, Daniel Söderberg³, Stephan V. Roth^2,4, and Peter Müller-Buschbaum¹ — ¹TU München, Physik-Department, LS Funktionelle Materialien, 85748 Garching — ²DESY, 22607 Hamburg — ³KTH, Fluidmechanics, SE-10044 Stockholm, Sweden — ⁴KTH, Fibre and Polymer Technology, SE-10044 Stockholm, Sweden

In the emerging field of printable electronics there is a growing demand for transparent, flexible substrate materials. Cellulose-based substrates are a promising sustainable alternative to fully synthetic polymers. We present the fabrication of conducting composite films of cellulose nanofibrils (CNF) and PEDOT:PSS. CNF of high surface charge are produced with TEMPO (2,2,6,6-tetramethylpiperidine-1-oxyl radical)-mediated oxidation and mixed with PEDOT:PSS in aqueous dispersion. Composite films are produced with a spray deposition process which is followed in situ with GISAXS with sub-second time resolution. GIWAXS applied to the final films is used for the investigation of crystallinity in the composite films. Different CNF/PEDOT:PSS ratios and the influence of the additive glycerol on the film morphology and conductivity are investigated. The improvement of conductivity with the co-solvent glycerol and alternative post-treatment with ethylene glycol for the composite films follows the same trend as for pure PEDOT:PSS films.