Superhydrophobicity, Photocatalytic Self-Cleaning and Biocidal Activity Combined in a Siloxane-ZnO Composite for the Protection of Limestone DOI Creative Commons
Panagiotis N. Manoudis, Ioannis Zuburtikudis, Georgios Konstantopoulos

et al.

Biomimetics, Journal Year: 2024, Volume and Issue: 9(9), P. 573 - 573

Published: Sept. 22, 2024

The erosion phenomena of the natural stone in cultural heritage are induced by various sources. Consequently, development multifunctional protective materials that combine two or more useful properties is an effective strategy addressing synergistic effects mechanisms. A coating, consisting a silane-based precursor and zinc oxide (ZnO) nanoparticles (NPs), produced tested for protection limestone. hybrid coating combines following three properties: superhydrophobicity, including water-repellency, photocatalytic self-cleaning biocidal activity. relative concentration NPs (0.8% w/w), used suggested composite carefully selected according to wetting studies, colourimetric measurements durability (tape peeling) tests. non-wetting state evidenced on surface large contact angle water drops (≈153°) small hysteresis (≈5°), which gives rise physical scenario (lotus effect). chemical shown with removal methylene blue, UV-A radiation. Moreover, it hinders incubation E. coli S. aureus, as inhibitions 94.8 99.9%, respectively. Finally, preliminary studies reveal stability coating.

Language: Английский

Theoretical Analysis of Contact Angle and Contact Angle Hysteresis of Wenzel Drops on Superhydrophobic Surfaces DOI Creative Commons
Yufeng Li, Junyan Liu,

Jialong Dong

et al.

Nanomaterials, Journal Year: 2024, Volume and Issue: 14(23), P. 1978 - 1978

Published: Dec. 9, 2024

Although understanding the wetting behavior of solid surfaces is crucial for numerous engineering applications, mechanisms driving motion Wenzel drops on rough remain incompletely clarified. In this study, contact angle and hysteresis superhydrophobic are investigated from a thermodynamic perspective. The free energy system theoretically analyzed, thereby determining equilibrium angle. Based sessile drop method, relationship between barrier volume calculated quantitatively, enabling determination advancing receding angles under zero conditions. theoretical calculations agree well with experimental data. These findings enhance interfacial interactions surfaces.

Language: Английский

Citations

2
Superhydrophobicity, Photocatalytic Self-Cleaning and Biocidal Activity Combined in a Siloxane-ZnO Composite for the Protection of Limestone DOI Creative Commons
Panagiotis N. Manoudis, Ioannis Zuburtikudis, Georgios Konstantopoulos

et al.

Biomimetics, Journal Year: 2024, Volume and Issue: 9(9), P. 573 - 573

Published: Sept. 22, 2024

The erosion phenomena of the natural stone in cultural heritage are induced by various sources. Consequently, development multifunctional protective materials that combine two or more useful properties is an effective strategy addressing synergistic effects mechanisms. A coating, consisting a silane-based precursor and zinc oxide (ZnO) nanoparticles (NPs), produced tested for protection limestone. hybrid coating combines following three properties: superhydrophobicity, including water-repellency, photocatalytic self-cleaning biocidal activity. relative concentration NPs (0.8% w/w), used suggested composite carefully selected according to wetting studies, colourimetric measurements durability (tape peeling) tests. non-wetting state evidenced on surface large contact angle water drops (≈153°) small hysteresis (≈5°), which gives rise physical scenario (lotus effect). chemical shown with removal methylene blue, UV-A radiation. Moreover, it hinders incubation E. coli S. aureus, as inhibitions 94.8 99.9%, respectively. Finally, preliminary studies reveal stability coating.

Language: Английский

Citations

0