Abstract
For the practical application of dynamic holography using updatable dyed materials, optical transparency and an enlarged sample size with a uniform dispersion of the dye and no air bubbles are crucial. The holographic films were prepared by applying a dyeing method comprising application, curing, dyeing, and washing to an unsaturated polyester (UP) resin film. The unsaturated polyester (UP) resin film with high optical transparency was dyed with a 3-[(4-cyanophenyl)azo]-9H-carbazole-9-ethanol (CACzE) (azo-carbazole) dye via the surfactant, polyoxyethylene (5) docosyl ether, in an aqueous solution. The amount of dye uptake obtained via the dyeing process ranged from 0.49 to 6.75 wt.%. The dye concentration in the UP resin was proportional to the dye concentration in the aqueous solution and the immersion time. The UP resin film with 3.65 wt.% dye exhibited the optical diffraction property η1 of 0.23% with a response time τ of 5.9 s and a decay time of 3.6 s. The spectroscopic evaluation of the UP resin film crosslinking reaction and the dyeing state in the UP resin film are discussed. Furthermore, as an example of its functionality, the dynamic holographic properties of the dye-doped UP resin film are discussed.
Highlights
Polymer-based dynamic holographic films have attracted considerable attention as a next-generation 3D display technology [1,2,3,4,5,6,7]
We focused on the dyeing process using aqueous dispersion; we introduced
The CACzE dyes were successfully dispersed into the unsaturated polyester (UP) resin film in the aqueous dye
Summary
Polymer-based dynamic holographic films have attracted considerable attention as a next-generation 3D display technology [1,2,3,4,5,6,7]. The maximum concentration of the CACzE dye uptake in the UP resin film was 6.75 wt.% at 7.60 × 10−3 mol L−1 CACzE aqueous dispersion (Entry 12), with a dyebath temperature at 120 ◦ C, and an immersion time of 12 h.
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