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http://dx.doi.org/10.3807/HKH.2009.20.2.123

Study of Diffraction Efficiency Values for Photopolymer Films Added TiO2 Nanoparticles  

Her, Ki-Young (Polymer materials Laboratory, Department of Chemical Engineering, Kwangwoon University)
Kim, Dae-Heum (Polymer materials Laboratory, Department of Chemical Engineering, Kwangwoon University)
Publication Information
Korean Journal of Optics and Photonics / v.20, no.2, 2009 , pp. 123-127 More about this Journal
Abstract
In order to improve the diffraction efficiency of the photopolymer, we prepared a $TiO_2$ added photopolymer and investigated the optical properties. Prepared photopolymer films are based on polyvinyl alcohol (PVA) as a polymer binder, acryl amide (AA) as a photo-polymerizable monomer, triethanolamine (TEOA) as an initiator, and eosin Y as a sensitizer at 532 nm. To prepare the photopolymer films with the uniform thickness, the constant amount (2.5 ml) of the photopolymer solution was dropped on the glass and spread using a spin coater. Then films were dried for 72 hrs in a darkroom ($20^{\circ}C$, 40% RH) prior to the optical measurement. Then, the diffraction efficiencies of both the photopolymer films containing $TiO_2$ and non-contained films were measured with the various incident angles ($20{\sim}70^{\circ}$). Therefore, $TiO_2$ added photopolymer showed 5% higher diffraction efficiency than neat photopolymer without $TiO_2$ addition. The addition of $TiO_2$ into the photopolymer showed the high diffraction efficiency (over 70%) at broad range ($20{\sim}70^{\circ}C$) of the incident angle.
Keywords
광고분자 필름;보안용 소재;폴리비닐알콜;산화티타늄;
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Times Cited By KSCI : 2  (Citation Analysis)
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