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Titel: Generation of wet-chemical AR-coatings on plastic substrates by use of polymerizable nanoparticles
Verfasser: Oliveira, Peter William de
Krug, Herbert
Frantzen, Andreas
Mennig, Martin
Schmidt, Helmut K.
Sprache: Englisch
Erscheinungsjahr: 1997
Quelle: Sol-gel optics IV : 30 July-1 August 1997, San Diego, California / Bruce S. Dunn ... [et al.], chairs/editors. - Bellingham, Wash. : SPIE, c1997. - (SPIE proceedings series ; 3136), S. 452-461
SWD-Schlagwörter: Matrix <Chemie>
Kolloidchemie
Additionsreaktion
Polymerisation
Nanopartikel
Kratzfestigkeit
Hydrolyse
Kondensation
DDC-Sachgruppe: 620 Ingenieurwissenschaften und Maschinenbau
Dokumentart : InProceedings (Aufsatz / Paper einer Konferenz etc.)
Kurzfassung: Multi-layer interference filters of surface modified SiO2- and TiO2- nanoparticles have been produced on Polycarbonat (PC) and on scratch resistant film. AR-coatings (Anti-Reflex-coatings) were prepared from a dispersion of SiO2 and TiO2 colloidal nanoparticles in a hybrid inorganic organic matrix. The TiO2 particles have been synthesized by addition of HCl and H2O to a solution of titanium tetraisopropanolate in isopropanol. The SiO2 nanoparticles were synthesized by base catalyzed hydrolyses and condensation of tetraethoxysilane (TEOS) mixed with an aqueous solvent. The surface modification of the TiO2 and SiO2 nanoparticles with 3-glycidoxypropyltrimethoxysilane (GPTS) avoids the agglomeration of the nanoparticles and covalent bonds between the matrix and nanoparticles are formed during a photopolymerization step. The nanoparticles were dispersed in a hydrolyzed GPTS matrix and UVI Cygacure 6974 was added as a photoinitiator. The &lambda;/4 (&lambda; = 550 nm) films of TiO2 and SiO2 sols were prepared on PC and on scratch resistant coated PC by spin-coating techniques. The refractive index of the SiO2/TiO2-coatings can be adjusted from 1.47 up to 1.94 depending on the SiO2 or TiO2 concentration. By the combination of index matching and photopolymerization, a low temperature interference filter can be realized for plastic substrates with reflection of 0.5 % at 550 nm. The coatings show excellent adhesion to the substrates in the cross hatch test and promising mechanical properties.
Link zu diesem Datensatz: urn:nbn:de:bsz:291-scidok-28503
hdl:20.500.11880/24602
http://dx.doi.org/10.22028/D291-24546
ISBN der Druckausgabe: 0-8194-2558-3
SciDok-Publikation: 6-Mai-2010
Fakultät: Sonstige Einrichtungen
Fachrichtung: SE - INM Leibniz-Institut für Neue Materialien
Fakultät / Institution:INM
SE - Sonstige Einrichtungen

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