Dresden 2014 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 23: Interfaces and Thin Films III
CPP 23.1: Vortrag
Dienstag, 1. April 2014, 15:00–15:15, ZEU 114
Core/Shell Microparticles by Direct Thiol-Ene Photocoating — •Christian Kuttner1, Helmut Schlaad2, and Andreas Fery1 — 1Physical Chemistry II, University of Bayreuth, 95447 Bayreuth, Germany — 2Max-Planck Institute of Colloids and Interfaces, Colloid Chemistry, 14424 Potsdam, Germany
Many technical applications utilize composite materials, which require specific interfacial properties between their constituents for good performance. Thus polymeric modifications are desirable for interface engineering. We developed a photocoating process based on surface-initiated thiol-ene photochemistry without the need for additional photoinitiator. By this photocoating, we prepared different core/shell composite particles consisting of polymeric shells and polyorganosiloxane cores with narrow size-distributions. [1]
Thiyl radicals at the particle surface are generated upon irradiation with UVA light. [2] The initiation process was studied by a dye degradation experiment revealing continuous formation of radicals in a timeframe of 24 hours. [1] Our approach allows for a rapid and versatile modification of surfaces and the preparation of tailored core/shell particles by both grafting-onto deposition of copolymers and grafting-from polymerization. [1-3]
[1] Kuttner, C. et al. Langmuir (accepted), DOI: 10.1021/la4039864.
[2] Kuttner, C. et al. ACS Appl Mater Interfaces 2012, 4, 3485-3492.
[3] Kuttner, C. et al. ACS Appl Mater Interfaces 2013, 5, 2469-2478.