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. 2022 Jan 28;14(3):531.
doi: 10.3390/polym14030531.

Infrared Efficiency and Ultraviolet Management of Red-Pigmented Polymethylmethacrylate Photoselective Greenhouse Films

Norah Alwadai  1 , Samah El-Bashir  2
Affiliations

Infrared Efficiency and Ultraviolet Management of Red-Pigmented Polymethylmethacrylate Photoselective Greenhouse Films

Norah Alwadai et al. Polymers (Basel). .

Abstract

Red-pigmented photoselective polymethylmethacrylate (PMMA) films were prepared by casting from polymer/chloroform solution. The films were doped with efficient red fluorescent perylene dyes specialized for plastic coloration, namely KREMER 94720 and KREMER 94739, which have excellent weathering stability and a high fluorescence quantum yield. The effect of the doping concentration was studied using the atomic force microscope (AFM), optical transmission, color measurement, time-resolved fluorescence, and Fourier transform infrared spectroscopy (FTIR). The obtained results suggested the potential usefulness for photoselective greenhouse cladding applications as the lowest doping concentration (10-5 wt%) displaying the UV-open effect, whereas the best UV-blocking and thermic effects were obtained for the highest doping concentration (10-1 wt).

Keywords: CIE 1931; PMMA; UV-blocking effect; UV-open effect; perylene; thermic effect.

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Conflict of interest statement

The authors declare no conflict of interests.

Figures

Figure 1
Figure 1
The new features of the suggested photoselective PMMA greenhouse films doped with perylene dyes KREMER 94720 and KREMER 94739. (a) Thermic effect. (b) UV-blocking effect.
Figure 2
Figure 2
Time-resolved fluorescence decay curves for perylene dyes (a) KREMER 94720 and (b) KREMER 94739.
Figure 3
Figure 3
AFM micrograph of photoselective PMMA greenhouse film doped with 10−1 wt% perylene dye (KREMER 94720).
Figure 4
Figure 4
Effect of dye concentration on the optical transmittance for Photoselective PMMA greenhouse films doped with perylene dyes KREMER 94720 and KREMER 94739.
Figure 5
Figure 5
Transmission spectra in the NUV range for photoselective PMMA greenhouse films doped with perylene dyes (a) KREMER 94720 and (b) KREMER 94739.
Figure 6
Figure 6
Correlation between the fluorescence spectra and inter-band transitions for photoselective PMMA greenhouse films doped with 0.1 wt% perylene dyes.
Figure 7
Figure 7
Chromaticity diagram of photoselective PMMA greenhouse films doped with (a) KREMER 94720 and (b) KREMER 94739.
Figure 8
Figure 8
FT-IR transmission spectra for photoselective PMMA greenhouse films doped with perylene dyes (a) KREMER 94720 and (b) KREMER 94739; the shaded pink area represents the range 7–13 µm for calculating the infrared efficiency.
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