Investigation of Nano-ZnO on Properties of Coatings Based on Fluorinated Polyurethane Emulsion

Abstract:

To develop environmentally friendly antifouling coatings, based on fluoro-modified polyurethane emulsion, eight coatings were prepared in which the content of nano-ZnO powder is respectively 0%, 0.2%,0.4%,0.6%,0.8%,1.0%,1.2% and 1.4 wt% in mass. Based on the measurement of mechanical and optical properties, surface roughness, morphological observation of coatings by Scanning Electron Microscopy (SEM), the influence of nano-ZnO was investigated on impact resistance, hardness, adhesive and flexibility, gloss, hydrophobicity, morphology and roughness of the coatings. The results showed that adding some nano-ZnO powder in paint did not affect the mechanical properties of the coatings, but it influenced obviously the surface topography and characteristics. The gloss reduces and the roughness increases with the content of nano-ZnO. The water contact angle is only 76.5° for the coating without nano-ZnO. The coating changed from hydrophilic to hydrophobic when nano-ZnO content increases up to 0.8 wt%, water contact angle excesses 90°, max water contact angle is up to 97.8° for coating with 1.4 wt % nano-ZnO powder.

• Periodical: Advanced Materials Research (Volumes 634-638)
• Pages: 2964-2968
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.634-638.2964
• Online since: January 2013
• Authors: Zhan Ping Zhang, Yu Hong Qi, Shuai Wang
• Keywords: Antifouling, Coating, Emulsion, Nano-ZnO, Polyurethane (PU)

References

[1] M E Callow et al. Microtopographic Cues for Settlement of Zoospores of the Green Fouling Alga Enteromorpha, Biofouling, 18(2002)237–245

DOI: 10.1080/08927010290014908

[2] Rosenhahn, A., Ederth, T., Pettitt, ME. Advanced nanostructures for the control of biofouling : the FP6 EU Integrated Project AMBIO. Biointerphases, 3 (2008) IR1-IR5.

DOI: 10.1116/1.2844718

[3] C. Neinhuis and W. Barthlott, Characterization and Distribution of Water-repellent, Self-cleaning Plant Surfaces, Annals of Botany 79(1997)667-677

DOI: 10.1006/anbo.1997.0400

[4] K. A. Mowery, M. H. Schoenfisch, J. E. Saavedra, et al. Preparation and characterization of hydrophobic polymeric films that are thromboresistant via nitric oxide release, Biomaterials 21(2000)9-21

DOI: 10.1016/s0142-9612(99)00127-1

[5] S. Sagnella, K. Mai-Ngam, Chitosan based surfactant polymers designed to improve blood compatibility on biomaterials, Colloids surf. B Biointerfaces 42(2005)147-155

DOI: 10.1016/j.colsurfb.2004.07.001

[6] Kohl, J.G. & Singer, I.L. Pull-off Behavior of Epoxy Bonded to Silicone Duplex Coatings, Progress in Organic Coatings, 36(1999)15-20

DOI: 10.1016/s0300-9440(98)00074-5

[7] Robert F. Brady, Fouling-release Coatings for Warships, Defence Science Journal, 55(2005) 75-81

DOI: 10.14429/dsj.55.1971

[8] J.A. Finlay, M.E. Callow, L.K. Ista, et al. Adhesion strength of settled spores of the green alga Enteromorpha and the diatom Amphora: the influence of surface wettability. Integr. Comp. Biol. 42(2002)1116-1122

DOI: 10.1093/icb/42.6.1116

[9] J.P. Youngblood, L. Andruzzi, C.K. Ober, et al. Coatings based on side-chain ether-linked poly(ethylene glycol) and fluorocarbon polymers for the control of marine biofouling, Biofouling 19 (Suppl.) (2003)91.

DOI: 10.1080/0892701021000053381

[10] R.F. Brady Jr. A fracture mechanical analysis of fouling release from nontoxic antifouling coatings, Progress in Organic Coatings 43(2001)188–192

DOI: 10.1016/s0300-9440(01)00180-1