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Research Article

Influence of wing scales of Catocala electa Borkhason on the frosting process

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Pages 240-249 | Received 11 Aug 2021, Accepted 11 Feb 2022, Published online: 23 Feb 2022

Figures & data

Figure 1. Adult of Catocala electa Borkhauson.

Figure 1. Adult of Catocala electa Borkhauson.

Figure 2. Experimental apparatus for observation of the frosting process on the sample surface. 1. PC (acquisition system); 2. temperature controller; 3. DC power; 4. climate chamber; 5. microscopic observation device; 6. microscope with a CCD camera; 7. sample; 8. cooling state; 9. copper plater with 3M thermally conductive tape.

Figure 2. Experimental apparatus for observation of the frosting process on the sample surface. 1. PC (acquisition system); 2. temperature controller; 3. DC power; 4. climate chamber; 5. microscopic observation device; 6. microscope with a CCD camera; 7. sample; 8. cooling state; 9. copper plater with 3M thermally conductive tape.

Figure 3. The frosting process on the wings with scales.

Figure 3. The frosting process on the wings with scales.

Figure 4. Diagram of frosting process on the wing surface with scales.

Figure 4. Diagram of frosting process on the wing surface with scales.

Figure 5. The frosting process on the wing without scales.

Figure 5. The frosting process on the wing without scales.

Figure 6. Diagram of frosting process on the wing surface without scales.

Figure 6. Diagram of frosting process on the wing surface without scales.

Figure 7. The chemical composition of the Catocala electa Borkhason wing.

Figure 7. The chemical composition of the Catocala electa Borkhason wing.

Figure 8. The contact angle of water droplets on the specimens. (a) contact angle on the wing surface with scales; (b) contact angle on the wing surface without scales.

Figure 8. The contact angle of water droplets on the specimens. (a) contact angle on the wing surface with scales; (b) contact angle on the wing surface without scales.

Figure 9. The microstructure of the wing surface of Catocala electa Borkhauson. (a) observed the wing surface without scales by Zeiss Stemi 2000-C; (b) observed the wing surface with scales by Zeiss Stemi 2000-C; (c) microscopic structure of the scale by atomic force microscope.

Figure 9. The microstructure of the wing surface of Catocala electa Borkhauson. (a) observed the wing surface without scales by Zeiss Stemi 2000-C; (b) observed the wing surface with scales by Zeiss Stemi 2000-C; (c) microscopic structure of the scale by atomic force microscope.

Figure 10. Scanning electron microscopy image of the wing of the Catocala electa Borkhason. (a) wing with scales; (b) wing without scales.

Figure 10. Scanning electron microscopy image of the wing of the Catocala electa Borkhason. (a) wing with scales; (b) wing without scales.