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http://dx.doi.org/10.5764/TCF.2018.30.3.190

The Scattering Property of EVA/SiO2 Composite Film Formed Micro-aggregation Structure for Roll-to-roll Process  

Jo, Kuk Hyun (Department of Organic Materials Science and Engineering, Pusan National University)
Yang, Jun Yeong (Department of Organic Materials Science and Engineering, Pusan National University)
Lee, Si Woo (Department of Organic Materials Science and Engineering, Pusan National University)
Park, Eun Kyoung (Department of Organic Materials Science and Engineering, Pusan National University)
Choi, Geun Seok (Department of Organic Materials Science and Engineering, Pusan National University)
Song, Ki Won (Department of Organic Materials Science and Engineering, Pusan National University)
Kim, Hyo Jung (Department of Organic Materials Science and Engineering, Pusan National University)
Publication Information
Textile Coloration and Finishing / v.30, no.3, 2018 , pp. 190-198 More about this Journal
Abstract
We fabricated high transmission and high scattering poly(ethylene-co-vinyl acetate)(EVA) films embedding $SiO_2$ nanoparticles to improve outcoupling efficiency in organic display. The 800nm diameter $SiO_2$ nanoparticles aggregated and formed $1.56{\mu}m$ (with ${\pm}0.853{\mu}m$ standard deviation) diameter microparticles in EVA. The total transmission of scattering film was 83.3% on Polyethylene terephthalate(PET), which was higher than reference 82.8% PET substrate. The diffuse transmission and haze of the $SiO_2$ embedded EVA film were 76.1% and 91.4%, respectively. The optimized condition was 1:1 weight ratio of $SiO_2$ nanoparticles to EVA in Tetrahydrofuran(THF) solution. When the ratio of $SiO_2$ was larger than 1, the total transmission decreased by the increase in backscattering of light due to high scattering. With the optimized condition, we could succeed to fabricate a large scale film(35m in length) with a roll-to-roll process.
Keywords
nanoparticle; aggregate; scattering film; roll-to-roll; $SiO_2$; EVA;
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