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http://dx.doi.org/10.3740/MRSK.2013.23.12.672

Preparation of Fe4[Fe(CN)6]3 Coated on Mica or TiO2/Mica for Infrared Reflective Blue Pigments and Isolation-heat Properties of These Paints  

Jung, Ha-Young (Eco-Composite Materials Center, Korea Institute of Ceramic Engineering & Technology(KICET))
Kim, Dae Sung (Eco-Composite Materials Center, Korea Institute of Ceramic Engineering & Technology(KICET))
Lee, Hyun-Jin (Eco-Composite Materials Center, Korea Institute of Ceramic Engineering & Technology(KICET))
Lee, Seung-Ho (Eco-Composite Materials Center, Korea Institute of Ceramic Engineering & Technology(KICET))
Lim, Hyung Mi (Eco-Composite Materials Center, Korea Institute of Ceramic Engineering & Technology(KICET))
Choi, Byung-Ki (CQV Co.)
Kang, Kwang-Jung (CQV Co.)
Choi, Jin-Sub (Department of Chemical Engineering, Inha University)
Publication Information
Korean Journal of Materials Research / v.23, no.12, 2013 , pp. 672-679 More about this Journal
Abstract
$Fe_4[Fe(CN)_6]_3$ coated on a mica or $TiO_2$/mica surface as infrared reflective blue pigment was prepared by a hydrothermal method. $Fe_4[Fe(CN)_6]_3$, used as coloring agent, was uniformly coated on mica or $TiO_2$/mica under the optimized condition of a 1.2 : 1 weight ratio between iron(III) chloride hexahydrate and potassium ferrocyanidetrihydrate at the initial pH level of 4.5 at $70^{\circ}C$. The infrared (IR)-reflective pigments were characterized by SEM, Zeta-potenial, FT-IR, and UV-VIS NIR spectrophotometry. Especially the CIE color coordinate and total solar reflectance(TSR) properties of the pigments were investigated in relation to variation of the coating and coated substrate thicknesses. Isolation-heat paint was prepared with 20 wt% blue pigments fully dispersed in acryl-urethane resin and several additives to coat the film uniformly. The films were also measured with CIE color coordinate, TSR, and the surface temperature was recorded by an isolation-heat measuring system. The pigments and films of $Fe_4[Fe(CN)_6]_3$ coated on mica and $TiO_2$/mica showed high TSR values compared with the TSR value of $Fe_4[Fe(CN)_6]_3$ itself. According to the increase of TSR value, the property of isolation-heat is effective. To realize the optimal blue color, we applied the the pigment to $TiO_2$ coated mica(TM(b)) which has blueish interference color. The pigment of $Fe_4[Fe(CN)_6]_3$ coated on TM(b) shows a strong blue color compared with that of $Fe_4[Fe(CN)_6]_3$ coated on $TiO_2$/Mmca(TM(w)), which has a whitish interference color.
Keywords
infrared reflective pigment; total solar reflection(tsr); color pigment; isolation-heat paint; refractive index;
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