Anticorrosive Polyurethane Clear Coat with Self-Cleaning Character
We have aimed to produce a self-cleaning transparent
polymer coating with polyurethane (PU) matrix as the latter is highly
solvent, chemical and weather resistant having good mechanical
properties. Nano-silica modified by 1H, 1H, 2H, 2Hperflurooctyltriethoxysilane
was incorporated into the PU matrix for
attaining self-cleaning ability through hydrophobicity. The
modification was confirmed by particle size analysis and scanning
electron microscopy (SEM). Thermo-gravimetric (TGA) studies were
carried to ascertain the grafting of silane onto the silica. Several
coating formulations were prepared by varying the silica loading
content and compared to a commercial equivalent. The effect of
dispersion and the morphology of the coated films were assessed by
SEM analysis. All coating standardized tests like solvent resistance,
adhesion, flexibility, acid, alkali, gloss etc. have been performed as
per ASTM standards. Water contact angle studies were conducted to
analyze the hydrophobic character of the coating. In addition, the
coatings were also subjected to salt spray and accelerated weather
testing to analyze the durability of the coating.
[1] Parker, G. J. (2010). Biomimetically-inspired photonic nanomaterials.
Journal of Materials Science: Materials in Electronics, 21(10), 965–
979. http://doi.org/10.1007/s10854-010-0164-1
[2] Parker, a R., & Lawrence, C. R. (2001). Water capture by a desert
beetle. Nature, 414(6859), 33–34. http://doi.org/10.1038/35102108
[3] Karthick, B., & Maheshwari, R. (2008). Lotus-inspired nanotechnology
applications. Resonance, 13(12), 1141–1145.
http://doi.org/10.1007/s12045-008-0113-y
[4] Xu, J., Shuai, Y., Zhou, L., Kesong, L., & Lei, J. (2012). Bio-inspired
special wetting surfaces via self-assembly. Science China Chemistry,
55(11), 2327–2333. http://doi.org/10.1007/s11426-012-4707-6
[5] Valipour M., N., Birjandi, F. C., & Sargolzaei, J. (2014). Super-nonwettable
surfaces: A review. Colloids and Surfaces A: Physicochemical
and Engineering Aspects, 448(1), 93–106.
http://doi.org/10.1016/j.colsurfa.2014.02.016
[6] Nimittrakoolchai, O. U., & Supothina, S. (2008). Deposition of organicbased
superhydrophobic films for anti-adhesion and self-cleaning
applications. Journal of the European Ceramic Society, 28(5), 947–952.
http://doi.org/10.1016/j.jeurceramsoc.2007.09.025
[7] Jin, M., Wang, J., Yao, X., Liao, M., Zhao, Y., & Jiang, L. (2011).
Underwater oil capture by a three-dimensional network architectured
organosilane surface. Advanced Materials, 23(25), 2861–2864.
http://doi.org/10.1002/adma.201101048
[8] Kenanakis, G., Vernardou, D., & Katsarakis, N. (2012). Light-induced
self-cleaning properties of ZnO nanowires grown at low temperatures.
Applied Catalysis A: General, 411-412, 7–14.
http://doi.org/10.1016/j.apcata.2011.09.041
[9] Bozzi, A., Yuranova, T., Guasaquillo, I., Laub, D., & Kiwi, J. (2005).
Self-cleaning of modified cotton textiles by TiO2 at low temperatures
under daylight irradiation. Journal of Photochemistry and Photobiology
A: Chemistry, 174(2), 156–164.
http://doi.org/10.1016/j.jphotochem.2005.03.019
[10] Manoudis, P., Papadopoulou, S., Karapanagiotis, I., Tsakalof, a,
Zuburtikudis, I., & Panayiotou, C. (2007). Polymer-Silica nanoparticles
composite films as protective coatings for stone-based monuments.
Journal of Physics: Conference Series, 61, 1361–1365.
http://doi.org/10.1088/1742-6596/61/1/269
[11] Ganesh, V. A., Raut, H. K., Nair, a. S., & Ramakrishna, S. (2011). A
review on self-cleaning coatings. Journal of Materials Chemistry,
21(41), 16304. http://doi.org/10.1039/c1jm12523k
[12] Owen, M. (2004). A review of significant directions in fluorosiloxane
coatings. Surface Coatings International Part B: Coatings Transactions,
87(2), 71–76. http://doi.org/10.1007/BF02699599
[13] Nakajima, a., Hashimoto, K., & Watanabe, T. (2001). Recent studies on
super-hydrophobic films. Monatshefte Fur Chemie, 132(1), 31–41.
http://doi.org/10.1007/s007060170142
[14] Aznar, a. C., Pardini, O. R., & Amalvy, J. I. (2006). Glossy topcoat
exterior paint formulations using water-based polyurethane/acrylic
hybrid binders. Progress in Organic Coatings, 55(1), 43–49.
http://doi.org/10.1016/j.porgcoat.2005.11.001
[15] Gurr, M., & Mülhaupt, R. (2012). Polymer Science: A Comprehensive
Reference. Polymer Science: A Comprehensive Reference (Vol. 10).
http://doi.org/10.1016/B978-0-444-53349-4.00202-8
[16] Zheng, Y., He, Y., Qing, Y., Zhuo, Z., & Mo, Q. (2012). Formation of
SiO 2/polytetrafluoroethylene hybrid superhydrophobic coating. Applied
Surface Science, 258(24), 9859–9863.
http://doi.org/10.1016/j.apsusc.2012.06.0434
[17] Wang, L., Liang, J., & He, L. (2014). Superhydrophobic and oleophobic
surface from fluoropolymer–SiO2 hybrid nanocomposites. Journal of
Colloid and Interface Science, 435, 75–82.
http://doi.org/10.1016/j.jcis.2014.08.017
[18] Zhang, L., Chang, Z. X., & Li, D. L. (2011). The Surface Modification
of Silica with Vinyltriethoxysilane. Advanced Materials Research, 399-
401, 1123–1130. http://doi.org/10.4028/www.scientific.net/AMR.399-
401.1123
[19] Pazokifard, S., Mirabedini, S. M., Esfandeh, M., & Farrokhpay, S. (n.d.).
Structure and Properties of Fluoroalkylsilane Treated Nano-Titania, 1–
10.
[1] Parker, G. J. (2010). Biomimetically-inspired photonic nanomaterials.
Journal of Materials Science: Materials in Electronics, 21(10), 965–
979. http://doi.org/10.1007/s10854-010-0164-1
[2] Parker, a R., & Lawrence, C. R. (2001). Water capture by a desert
beetle. Nature, 414(6859), 33–34. http://doi.org/10.1038/35102108
[3] Karthick, B., & Maheshwari, R. (2008). Lotus-inspired nanotechnology
applications. Resonance, 13(12), 1141–1145.
http://doi.org/10.1007/s12045-008-0113-y
[4] Xu, J., Shuai, Y., Zhou, L., Kesong, L., & Lei, J. (2012). Bio-inspired
special wetting surfaces via self-assembly. Science China Chemistry,
55(11), 2327–2333. http://doi.org/10.1007/s11426-012-4707-6
[5] Valipour M., N., Birjandi, F. C., & Sargolzaei, J. (2014). Super-nonwettable
surfaces: A review. Colloids and Surfaces A: Physicochemical
and Engineering Aspects, 448(1), 93–106.
http://doi.org/10.1016/j.colsurfa.2014.02.016
[6] Nimittrakoolchai, O. U., & Supothina, S. (2008). Deposition of organicbased
superhydrophobic films for anti-adhesion and self-cleaning
applications. Journal of the European Ceramic Society, 28(5), 947–952.
http://doi.org/10.1016/j.jeurceramsoc.2007.09.025
[7] Jin, M., Wang, J., Yao, X., Liao, M., Zhao, Y., & Jiang, L. (2011).
Underwater oil capture by a three-dimensional network architectured
organosilane surface. Advanced Materials, 23(25), 2861–2864.
http://doi.org/10.1002/adma.201101048
[8] Kenanakis, G., Vernardou, D., & Katsarakis, N. (2012). Light-induced
self-cleaning properties of ZnO nanowires grown at low temperatures.
Applied Catalysis A: General, 411-412, 7–14.
http://doi.org/10.1016/j.apcata.2011.09.041
[9] Bozzi, A., Yuranova, T., Guasaquillo, I., Laub, D., & Kiwi, J. (2005).
Self-cleaning of modified cotton textiles by TiO2 at low temperatures
under daylight irradiation. Journal of Photochemistry and Photobiology
A: Chemistry, 174(2), 156–164.
http://doi.org/10.1016/j.jphotochem.2005.03.019
[10] Manoudis, P., Papadopoulou, S., Karapanagiotis, I., Tsakalof, a,
Zuburtikudis, I., & Panayiotou, C. (2007). Polymer-Silica nanoparticles
composite films as protective coatings for stone-based monuments.
Journal of Physics: Conference Series, 61, 1361–1365.
http://doi.org/10.1088/1742-6596/61/1/269
[11] Ganesh, V. A., Raut, H. K., Nair, a. S., & Ramakrishna, S. (2011). A
review on self-cleaning coatings. Journal of Materials Chemistry,
21(41), 16304. http://doi.org/10.1039/c1jm12523k
[12] Owen, M. (2004). A review of significant directions in fluorosiloxane
coatings. Surface Coatings International Part B: Coatings Transactions,
87(2), 71–76. http://doi.org/10.1007/BF02699599
[13] Nakajima, a., Hashimoto, K., & Watanabe, T. (2001). Recent studies on
super-hydrophobic films. Monatshefte Fur Chemie, 132(1), 31–41.
http://doi.org/10.1007/s007060170142
[14] Aznar, a. C., Pardini, O. R., & Amalvy, J. I. (2006). Glossy topcoat
exterior paint formulations using water-based polyurethane/acrylic
hybrid binders. Progress in Organic Coatings, 55(1), 43–49.
http://doi.org/10.1016/j.porgcoat.2005.11.001
[15] Gurr, M., & Mülhaupt, R. (2012). Polymer Science: A Comprehensive
Reference. Polymer Science: A Comprehensive Reference (Vol. 10).
http://doi.org/10.1016/B978-0-444-53349-4.00202-8
[16] Zheng, Y., He, Y., Qing, Y., Zhuo, Z., & Mo, Q. (2012). Formation of
SiO 2/polytetrafluoroethylene hybrid superhydrophobic coating. Applied
Surface Science, 258(24), 9859–9863.
http://doi.org/10.1016/j.apsusc.2012.06.0434
[17] Wang, L., Liang, J., & He, L. (2014). Superhydrophobic and oleophobic
surface from fluoropolymer–SiO2 hybrid nanocomposites. Journal of
Colloid and Interface Science, 435, 75–82.
http://doi.org/10.1016/j.jcis.2014.08.017
[18] Zhang, L., Chang, Z. X., & Li, D. L. (2011). The Surface Modification
of Silica with Vinyltriethoxysilane. Advanced Materials Research, 399-
401, 1123–1130. http://doi.org/10.4028/www.scientific.net/AMR.399-
401.1123
[19] Pazokifard, S., Mirabedini, S. M., Esfandeh, M., & Farrokhpay, S. (n.d.).
Structure and Properties of Fluoroalkylsilane Treated Nano-Titania, 1–
10.
@article{"International Journal of Chemical, Materials and Biomolecular Sciences:71839", author = "Nihit Madireddi and P. A. Mahanwar", title = "Anticorrosive Polyurethane Clear Coat with Self-Cleaning Character", abstract = "We have aimed to produce a self-cleaning transparent
polymer coating with polyurethane (PU) matrix as the latter is highly
solvent, chemical and weather resistant having good mechanical
properties. Nano-silica modified by 1H, 1H, 2H, 2Hperflurooctyltriethoxysilane
was incorporated into the PU matrix for
attaining self-cleaning ability through hydrophobicity. The
modification was confirmed by particle size analysis and scanning
electron microscopy (SEM). Thermo-gravimetric (TGA) studies were
carried to ascertain the grafting of silane onto the silica. Several
coating formulations were prepared by varying the silica loading
content and compared to a commercial equivalent. The effect of
dispersion and the morphology of the coated films were assessed by
SEM analysis. All coating standardized tests like solvent resistance,
adhesion, flexibility, acid, alkali, gloss etc. have been performed as
per ASTM standards. Water contact angle studies were conducted to
analyze the hydrophobic character of the coating. In addition, the
coatings were also subjected to salt spray and accelerated weather
testing to analyze the durability of the coating.
", keywords = "FAS, nano-silica, PU clear coat, self-cleaning.", volume = "10", number = "1", pages = "34-8", }
