Paper Title:

Influence of Nanosilica/Polyurethane Composite Coating on IR Effectiveness and Visible Light Transmission Properties of Polyethylene

Periodical Advanced Materials Research (Volumes 97 - 101)
Main Theme Manufacturing Science and Engineering I
Edited by Zhengyi Jiang and Chunliang Zhang
Pages 1669-1672
DOI 10.4028/www.scientific.net/AMR.97-101.1669
Citation Ching Yern Chee et al., 2010, Advanced Materials Research, 97-101, 1669
Online since March 2010
Authors Ching Yern Chee, Iskandar Idris Yaacob
Keywords Coating, Infrared Effectiveness, Nanocomposite, Nanosilica, Polyurethane (PU)
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Polyethylene (PE) film was coated with nanosilica-polyurethane layer using rod Mayer process. The nanosilica-polyurethane system was prepared by dispersing nanosilica (SiO2) powder into solvent borne polyurethane (PU) binder under vigorous stirring. Various compositions of nanosilica-polyurethane slurry were prepared. A battery of characterization procedures were used to study the properties of the nanocomposite coating. ATR FTIR confirmed the presence of functional groups of silica and polyurethane. The uniformity of silica dispersion was probed using scanning electron microscopy (SEM). With the introduction of nanosilica to polyurethane binder, the visible light transmittance and ultra-violet (UV) radiation of nanosilica-polyurethane system reduced with increasing nanosilica content and coating layer thickness. The PE coated with nanocomposite containing 14wt% nanosilica and with 8 µm coating thickness showed >88% transmittance in the visible light region. Infrared (IR) effectiveness (between 7 μm to 13 μm wavelengths) measurements by FTIR also showed that nanosilica/polyurethane system coating on PE film surface greatly improved the infrared opacity properties of PE film.