습식 환원법에 의한 Antimony-doped Tin Oxide의 합성 및 NIR-Cut 필름의 제조

Abstract

Recently, many kinds of functional plastic film have been made as like as smart window film, photochromic film, conducting film, color tuning film, sealing film, anti-reflecting film, anti-glare film etc. to satisfy commercial need. The functional film made from organic compound offers excellent functional property, but cannot sustain for longtime use because of low durability. Therefore, it requires to adapt organic-inorganic hybrid concept. In this study, our aim is the fabrication of functional film cutting infrared wave with absorbance and reflectance. The nano particle of antimony-doped tin oxide shields infrared wave, which is a deliver media of heat energy at surface and inside of film. The synthetic method and mixing technique of nano particle are necessary different chemical approach. Thus, antimony-doped tin oxide nano particles should prepared by the coprecipitation method in autoclave and sol was made with film by spin coating method. First of all, ATO(OH) containing hydroxy group was prepared by coprecipitation method with autoclave, and then reduced by firing process to remove hydroxy and oxygen. Finally pure ATO was obtained. In this case, the use of hydrogen gas as reducing agent is very dangerous reduction firing process. It can be explosion if oxygen mixed a little in hydrogen gas. So, it is difficult to apply to synthesize economical process. The NIR-cut compound was prepared by mixing ATO nanopowder, NIR absorbing dye and binder. The NIR-cut film was prepared on PET film by spin-coating NIR-cut compound. Therefore, hydrazine was used as reducing agent. Properties of ATO nano powder and NIR-cut film are analyzed by XRD, PSA, SEM, FE-SEM, TEM, UV-VIS spectroscopy, and Zeta-potential.