Thin film of Polyacrylic acid-co-allyl acrylate as a Sacrificial Protective Layer for Hydrophilic Self Cleaning GlassReportar como inadecuado


Thin film of Polyacrylic acid-co-allyl acrylate as a Sacrificial Protective Layer for Hydrophilic Self Cleaning Glass


Thin film of Polyacrylic acid-co-allyl acrylate as a Sacrificial Protective Layer for Hydrophilic Self Cleaning Glass - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

DWI an der RWTH Aachen e.V. and Institute of Technical and Macromolecular Chemistry, RWTH Aachen, Pauwelsstr. 8, D-52056 Aachen, Germany





*

Authors to whom correspondence should be addressed.



Abstract Polyacrylic acid-co-allyl acrylate statistical copolymers were synthesized in a controlled manner in two steps: first tert.butyl acrylate and allyl acrylate were polymerized via atom transfer radical polymerization ATRP and afterwords the tert.butyl protective groups were removed via hydrolysis. Samples of self cleaning glass SCG were coated with thin films of polyacrylic acid-co-allyl acrylate and cross-linked afterwards by UV irradiation in the presence of a photoinitiator and an accelerator. Solution cast thin films were transparent and homogeneous before and after UV cross-linking. The irradiated samples were found to be hydrophilic Θ 20° and water insoluble. The coating prevented the spontaneous hydrophobization of the SCG by residual silicon exhaled from the sealing material. The TiO2 photocatalyst that covers the glass surface was found to strip the protective coating. The rate of the photooxidation process was measured by IR spectroscopy. The real field performance of the protective coating was also tested. View Full-Text

Keywords: thin films; self-cleaning glass; ATRP; cross-linking reaction; hydrogels thin films; self-cleaning glass; ATRP; cross-linking reaction; hydrogels





Autor: Jānis Lejnieks, Ahmed Mourran * , Walter Tillmann, Helmut Keul * and Martin Möller *

Fuente: http://mdpi.com/



DESCARGAR PDF




Documentos relacionados