Viscosity, surface tension and refractive index of tetraethylorthosilicate-based sol-gel materials depending on ethanol content

• Autorzy: Hołowacz I. , Podbielska H. , Bauer J. , Ulatowska-Jarża A.
• Konferencja: 7th Seminar Porous Glasses - Special Glasses PGL, 2005, Szklarska Poręba, Poland, September 10-14, 2005 r.
• Języki publikacji: EN

Abstrakty

EN

The sol-gel-derived materials can be exploited for the number of applications, including biomaterials and measuring techniques. One of the most important applications involves production of sol-gel coatings. In this study, silica based sol-gel materials were prepared by way of acid hydrolysis with alcohol as a solvent. Tetraethylorthosilicate (TEOS) was used as a precursor. Different samples were tested; with molar ratios R = 5, 10, 15, 20, 32 and 50, denoting the number of ethanol moles to the number of TEOS moles. The viscosity and surface tension of liquid hydrolizates were measured depending on the ethanol content in sol-gel. The thickness of a coating layer was determined, as well. The refractive index was measured 10 days long, up to the point of gelation. It was demonstrated that viscosity, surface tension and refractive index are lower for higher R value (for higher alcohol content), whereas the sol-gel layers produced with higher R values are thicker than these ones produced with lower alcohol content. It is also demonstrated that R value influences the performance of fiberoptic sol-gel applicators for interstitial laser therapy.

Słowa kluczowe

EN

sol-gel coating; sol viscosity; sol; viscosity; surface tension; refractive index

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2005
• Tom: Vol. 35, nr 4
• Strony: 691--699
• Opis fizyczny: Bibliogr. 24 poz.

Twórcy

autor

Hołowacz I.

• Bio-Optics Group, Institute of Physics, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław

autor

Podbielska H.

• Bio-Optics Group, Institute of Physics, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław

autor

Bauer J.

• Bio-Optics Group, Institute of Physics, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław

autor

Ulatowska-Jarża A.

• Bio-Optics Group, Institute of Physics, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław

Bibliografia

• [1] Klein L.C. [Ed.], Sol-Gel Optics: Processing and Applications, Kluwer Academic Publishers, Boston 1994.
• [2] Paterson M.J., Ben-Nissan B., Multilayer sol-gel zirconia coatings on 316 stainless steel, Surface and Coatings Technology 86-87(1-3), 1996, pp. 153-8.
• [3] Liu D-M., Yang Q., Troczynski T., Sol-gel hydroxyapatite coatings on stainless steel substrates, Biomaterials 23(3), 2002, pp. 691-8.
• [4] Que W., Sun Z., Zhou Y., Lam Y.L., Cheng S.D., Chan Y.C., Kam C.H., Preparation of hard optical coatings based on an organic/inorganic composite by sol-gel method, Materials Letters 42(5), 2000, pp. 326-30.
• [5] Sakka S., Kozuka H., Sol-gel preparation of coating films containing noble metal colloids, Journal of Sol-Gel Science and Technology 13(1-3), 1998, pp. 701-5.
• [6] Garcia C., Galliano P., Cere S., Elecrochemical evaluation of resistance to localised corrosion of vitreous coatings containing particles applied on metalic substrates for biomedical applications, Materials Letters 57(12), 2003, pp. 1810-4.
• [7] Liu J-X., Yang D-Z., Shi F., Cai Y-J., Sol-gel deposited TiO2 film on NiTi surgical alloy for biocompatybility improvement. Thin Solid Films 429(1-2), 2003, pp. 225-30.
• [8] Olding T., Sayer M., Barrow D., Ceramic sol-gel composite coatings for elecrical insulation, Thin Solid Films 398-399, 2001, pp. 581-6.
• [9] Nablo B.J., Rothrock A.R., Schoenfisch M.H., Nitric oxide-releasing sol-gels as antibacterial coatings for orthopedic implants, Biomaterials 26(8), 2005, pp. 917-24.
• [10] Kim H-W., Kim H-E., Knowles J.C., Fluor-hydroxyapatite sol-gel coating on titanium substrate for hard tissue implants, Biomaterials 25(17), 2004, pp. 3351-8.
• [11] Boettcher H., Bioactive sol-gel coatings, Journal für praktische Chemie 342(5), 2000, pp. 427-36.
• [12] Weng W., Zhang S., Cheng K., Qu H., Du P., Shen G., Yuan J., Han G., Sol-gel preparation of bioactive apatite films, Surface and Coatings Technology 167(2-3), 2003, pp. 292-6.
• [13] Reisfeld R., Jorgensen C.K. [Eds.], Chemistry, Spectroscopy and Applications of Sol-Gel Glasses, Springer Verlag, Berlin 1992.
• [14] Podbielska H., Ulatowska-Jarza A., Holowacz I., Sol-gel applicators for medical light therapy, Physica Medica 20(Supplement 1), 2004, pp. 43-5.
• [15] Muller G., Rogan A. [Eds.], Laser-Induced Interstitial Thermotherapy, SPIE Optical Engineering Press, Bellingham, Washington, USA 1995.
• [16] Rohde E., Mesecke von Rheinbaben I., Roggan A., Podbielska H., Hopf M., Mueller G., Interstitial laser-induced thermotheraphy (LITT): Comparison of in-vitro irradiation effects of Nd:YAG (1064 nm) and diode (940 nm) laser, Medical Laser Application 16(2), 2001, pp. 81-90.
• [17] Lechna M., Holowacz I., Ulatowska A., Podbielska H., Optical properties of sol-gel coating for fiberoptic sensors, Surface and Coatings Technology 151-152, 2002, pp. 299-302.
• [18] Jelen L., Cegielski M., Ulatowska-Jarza A., Podbielska H., Influence of sample preparation methods on transmission electron micrographs of sol-gel materials, Optica Applicata 32(4), 2002, pp. 759-66.
• [19] Kobel J., Suchwalko A., Podbielska H., Ulatowska-Jarza A., Examination of sol-gel production repeatability by statistical pattern recognition method, Optical Engineering 42(4), 2003, pp. 1137-43.
• [20] Brinker C. J., Scherer G.W., Sol-Gel Science, 1st ed., Chapter 13, Academic Press, Boston 1990.
• [21] Rheims J., Koser J., Wriedt T., Refractive index measurements in the near-IR using an Abbe refractometer, Measurement Science and Technology 8(6), 1997, pp. 601-5.
• [22] Massey B.S., Mechanics of Fluid, Van Nostrand Reinhold 1989.
• [23] Landau L., Levich B., Dragging of a liquid by a moving plate, Acta Physiochim U.R.S.S. 17, 1942, pp. 42-54.
• [24] Strawbridge I., James P.F., Thin silica films prepared by dip coating, Journal of Non-Crystalline Solids 82(1-3), 1986, pp. 366-72.