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Nanoscience and Technology: An International Journal

Publicou 4 edições por ano

ISSN Imprimir: 2572-4258

ISSN On-line: 2572-4266

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 1.3 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 1.7 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.7 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00023 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.11 SJR: 0.244 SNIP: 0.521 CiteScore™:: 3.6 H-Index: 14

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SYNTHESIS OF HYDROPHOBIC COATING USING A SOL−GEL PYROLYTIC SPRAY COATING SYSTEM

Volume 10, Edição 3, 2019, pp. 219-232
DOI: 10.1615/NanoSciTechnolIntJ.2019030945
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RESUMO

This paper reports the synthesis of hydrophobic coatings using sol−gels approach of a mixture of two sorts of chemicals: tetraethylorthosilicate (TEOS) as a glass binder precursor and heptadecafluorodecyltrimethoxysilane (HFTMS) as a surface modifying agent deposited using the low-temperature pyrolytic spray coating process. The target glass substrate was priorly coated with TEOS for the surface preparation of TEOS:HFTMS coating at ethanol evaporation temperature of 60°C. The hydrophobic TEOS:HFTMS sol−gel was prepared at fixed weight ratio of 10:1 without using any acidic/alkaline catalyst to ensure uniform sol−gel's particle size and to eliminate the clogging problem at the nozzle during the spray process. The coated sample had shown high hydrophobic properties with maximum water contact angle of 109° at low grain height and surface roughness. From atomic force microscopy (AFM) surface topology measurement, it was found that the pyrolytic spray coating technique is capable of tuning the surface properties and grain dimension simply by changing the atomizing air pressure, number of paths and chemical flowrate. This was due to the unique approach by spraying the coating at evaporation temperature of the coating solvent. The technique can be utilized to surface engineering the final quality of a thin film coating.

Referências
  1. Arkles, B., Hydrophobicity, Hydrophilicity and Silanes, Paint Coat. Ind., vol. 114, 2006.

  2. Baesch, S., Price, K., Scharfer, P., Francis, L., and Schabel, W., Influence of the Drying Conditions on the Particle Distribution in Particle Filled Polymer Films: Experimental Validation of Predictive Drying Regime Maps, Chem. Eng. Process.: Process Intensif., vol. 123, pp. 138-147, 2018.

  3. Bhushan, B. and Nosonovsky, M., The Rose Petal Effect and the Modes of Superhydrophobicity, Phil. Trans.: Series A, Math., Phys., Eng. Sci, vol. 368, pp. 4713-4728, 2010.

  4. Buss, F., Roberts, C.C., Crawford, K.S., Peters, K., and Francis, L.F., Effect of Soluble Polymer Binder on Particle Distribution in a Drying Particulate Coating, J. Colloid Interface Sci., vol. 359, no. 1, pp. 112-120, 2011.

  5. Cai, S., Zhang, Y., Zhang, H., Yan, H., Lv, H., and Jiang, B., Sol-Gel Preparation of Hydrophobic Silica Anti-Reflective Coatings with Low Refractive Index by Base: Acid Two-Step Catalysis, Appl. Mater. Interfaces, vol. 6, pp. 11470-11475, 2014.

  6. Chou, T. and Cao, G., Adhesion of Sol-Gel Derived Organic Inorganic Hybrid Coating on Polyester, J. Sol-Gel Sci. Technol, vol. 37, pp. 31-41, 2003.

  7. De Coninck, J., Dunlop, F., and Rivasseau, V., On the Microscopic Validity of the Wulff Construction and of the Generalized Young Equation, Commun. Math. Phys., vol. 121, no. 3, pp. 401-419, 1989.

  8. Figueira, R., Fontinha, I., Silva, C., and Pereira, E., Hybrid Sol-Gel Coatings: Smart and Green Materials for Corrosion Mitigation, Coatings, vol. 6, no. 1, pp. 1-19, 2016.

  9. Ha, J.W., Park, I.J., and Lee, S.B., Antireflection Surfaces Prepared from Fluorinated Latex Particles, Macromolecules, vol. 41, no. 22, pp. 8800-8806, 2008.

  10. Han, J.T., Kim, S.Y., Woo, J.S., and Lee, G.W., Transparent, Conductive, and Superhydrophobic Films from Stabilized Carbon Nanotube/Silane Sol Mixture Solution, Adv. Mater., vol. 20, no. 19, pp. 3724-3727, 2008.

  11. Hejda, F., Solar, P., and Kousal, J., Surface Free Energy Determination by Contact Angle Measurements-A Comparison of Various Approaches, WDS'10 Proc. of Contributed Papers, no. 3, pp. 25-30, 2010.

  12. Kumar, D., Wu, X., Fu, Q., Ho, J.W.C., Kanhere, P.D., Li, L., and Chen, Z., Hydrophobic Sol-Gel Coatings Based on Polydimethylsiloxane for Self-Cleaning Applications, Mater. Design, vol. 86, pp. 855-862, 2015.

  13. Lei, H., Xiong, M., Xiao, J., Zheng, L., Zhu, Y., Li, X., Zhuang, Q., and Han, Z., Fluorine-Free Low Surface Energy Organic Coating for Antistain Applications, Prog. Organic Coat., vol. 103, pp. 182-192, 2017.

  14. Liang, J., Zhou, Y., Jiang, G., Wang, R., Wang, X., Hu, R., and Xi, X., Transformation of Hydrophilic Cotton Fabrics into Superhydrophobic Surfaces for Oil/Water Separation, J. Textile Inst., vol. 104, no. 3, pp. 305-311, 2013.

  15. Lieber, C., Nanoscale Science and Technology: Building a Big Future from Small Things, MRS Bull., vol. 28. pp. 486-491, 2003.

  16. Liu, Y., Moevius, L., Xu, X., Qian, T., Yeomans, J.M., and Wang, Z., Pancake Bouncing on Superhydrophobic Surfaces, Nature Phys., vol. 10, no. 7, pp. 515-519, 2014.

  17. Mathkar, A., Narayanan, T.N., Alemany, L.B., Cox, P., Nguyen, P., Gao, G., Chang, P., Romero-Aburto, R., Mani, A.S., and Ajayan, P.M., Synthesis of Fluorinated Graphene Oxide and Its Amphiphobic Properties, Particle Particle Syst. Characteriz., vol. 30, no. 3, pp. 266-272, 2013.

  18. Montemor, M.F., Functional and Smart Coatings for Corrosion Protection: A Review of Recent Advances, Surf. Coat. Technol., vol. 258, pp. 17-37, 2014.

  19. Rulison, C., Two-Component Surface Energy Characterization as a Predictor of Wettability and Dispersability, KRUSS GmbH., Borsteler Chaussee, Hamburg, Germany, Rep. AN213/CR, Jan., 2000.

  20. Schrader, M.E., Young-Dupre Revisited, Langmuir, vol. 11, no. 6, pp. 3585-3589, 1995.

  21. Stalder, A.F., Melchior, T., Muller, M., Sage, D., Blu, T., and Unser, M., Low-bond Axisymmetric Drop Shape Analysis for Surface Tension and Contact Angle Measurements of Sessile Drops, Colloids Surfaces A: Physicochem. Eng. Aspects, vol. 364, nos. 1-3, pp. 72-81, 2010.

  22. Vincent, A., Babu, S., Brinley, E., Karakoti, A., Deshpande, S., and Seal, S., Role of Catalyst on Refractive Index Tunability of Porous Silica Anti-Reflective Coatings by Sol-Gel Technique, J. Phys. Chem. C, vol. 111, no. 23, pp. 8291-8298, 2007.

  23. Wankhede, R.G., Shantaram, Thanawala, K., Khanna, A., and Birbillis, N., Development of Hydrophobic Non-Fluorine Sol-Gel Coatings on Aluminium Using Long Chain Alkyl Silane Precursor, J. Mater. Sci. Eng., vol. 3, no. 4, pp. 224-231, 2013.

  24. Xie, H., Wei, J., and Zhang, X., Characterisation of Sol-Gel Thin Films by Spectroscopic Ellipsometry, J. Phys.: Conf. Ser., vol. 28, no. 1, pp. 95-99, 2006.

  25. Zhou, Y., Xu, F., Jiang, G., Wang, X., Hu, R., Wang, R., Xi, X., Wang, S., Wang, T., and Chen, W., Superhydrophobic and High Adhesive Performance of Functionalized Graphene Films, Powder Technol, vol. 30, pp. 247-251, 2012.

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