Artículos
Efecto de las variables de síntesis de telas de TiO2/poliéster sobre su fotoactividad y estabilidad
Publicado 2016-12-15
Palabras clave
- Tela Recubierta,
- TiO2-SiO2,
- Fotocatálisis,
- Inactivación de E.Coli.
Cómo citar
Velasco, E., Castro, C., & Giraldo, S. (2016). Efecto de las variables de síntesis de telas de TiO2/poliéster sobre su fotoactividad y estabilidad. Revista ION, 29(2). https://doi.org/10.18273/revion.v29n2-2016004
Resumen
Muestras de tela recubiertas con TiO2-SiO2 fueron obtenidas por inmersión de un poliéster comercial de 9 cm2 en una suspensión de TiO2-SiO2.Esta suspensión se preparó adicionando TiO2 P25 a una matriz de sílice sintetizada mediante la hidrólisis de ortosilicato de tetraetilo (TEOS). El objetivo de este trabajo fue estudiar la relación entre el tiempo de inmersión de la tela, y la actividad fotocatalítica y estabilidad del recubrimiento a varios ciclos de uso y lavado. Las muestras obtenidas fueron caracterizadas por microscopía electrónica de barrido (SEM), espectroscopía de energía dispersiva (EDS) y espectroscopía infrarroja (FTIR-ATR). La evaluación de los textiles se llevó a cabo mediante pruebas de autodesinfección bajo 250W/m2 de luz solar simulada usando E. coli como microorganismo modelo. En general, todas las telas modificadas (excepto las obtenidas con 2h de inmersión) inactivaron la bacteria en menos de 120min, previniendo su recrecimiento bacteriano al menos por 24h después de las pruebas de desinfección. Se determinó que los tiempos de inmersión bajos (3-4h) dejan telas activas y estables a 3 ciclos de uso y lavado, mientras que tiempos de inmersión más altos (12h) dejan telas más activas pero inestables.
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Referencias
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[2] Yuranova T, Laub D, Kiwi J. Synthesis, activity and characterization of textiles showing self-cleaning activity under daylight irradiation Catal. Today. 2007;122:109–17.
[3] Wu D, Long M, Zhou J, Cai W, Zhu X, Chen C, et al. Synthesis and characterization of self-cleaning cotton fabrics modified by TiO2through a facile approach. Surf. Coat. Technol. 2009;203:3728–33.
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[5] Rincón AG, Pulgarin C. Absence of E. coliregrowth after Fe3+ and TiO2 solar photoassisted disinfection of water in CPC solar photoreactor. Catal. Today. 2007;124:204–14.
[6] Moncayo-Lasso A, Torres-Palma RA, Kiwi J, Benítez N, Pulgarin C. Bacterial inactivation and organic oxidation via immobilized photo-Fenton reagent on structured silica surfaces. Appl. Catal. B. 2008;84:577–83.
[7] Acosta S, Aragón JC, Benoit SR, Betancourt MI, Clara LI, Costa SF, et al. Evaluación de la infección hospitalaria en siete países latinoamericanos Rev. Panam. Infectol. 2008;10(4):112-22.
[8] Struelens MJ, Denis O, Rodriguez-Villalobos H. Mocrobiology of nosocomial infections: progress and challenges. Microbes Infect. 2004;6:1043-8.
[9] Sligl W, Taylor G, Brindley PG. Five years of nosocomial Gram-negative bacteremia in a general intensive care unit: epidemiology, antimicrobial susceptibility patterns, and outcomes. Int. J. Infect. Diseases. 2006;10(4):320-5.
[10] Cáceres Manrique FM, Díaz Martínez LA. Incidencia de infección nosocomial, ESE Hospital Universitario Ramón González Valencia, 1995-2000. MEDUNAB. 2002;5(13):5-13.
[11] Del Río J, Buriticá O. Evaluación de un sistema de vigilancia epidemiológica y riesgos de infección intrahospitalaria en pacientes quirúrgicos. Colombia Médica. 2000;31(2):71-6.
[12] Montazer M, Pakdel E. Functionality of nano titanium dioxide on textiles with future aspects: Focus on woolJ. Photochem. Photobiol. C. 2011;12(4):293– 303.
[13] Dastjerdi R, Montazer M. A review on the application of inorganic nano-structured materials in the modification of textiles: Focus on anti-microbial properties. Colloids Surf. B. 2010;79(1):5-18.
[14] Shan AY, Ghazi TIM, Rashid SA. Immobilisation of titanium dioxide onto supporting materials in heterogeneous photocatalysis: A review. Appl. Catal. A. 2010;389:1-8.
[15] Liu B, Wang Z, He J. SiO2/TiO2 multilayer films grown on cotton fibers surface at low temperature by a novel two-step process. Mater. Lett. 2012;67:8–10.
[16] Bellardita M, Addamo M, Di Paola A, Marcì G, Palmisano L, Cassar L, et al. Photocatalytic activity of TiO2/SiO2 systems. J. Hazard. Mater. 2010;174:707–13.
[17] Fakin D, Veronovski N, Ojstrsek A, Bozic M. Synthesis of TiO2–SiO2 colloid and its performance in reactive dyeing of cotton fabrics. Carbohydr. Polym. 2012;88:992–1001.
[18] Nakano R, Chand R, Obuchi E, Katoh K, Nakano K. Performance of TiO2 photocatalyst supported on silica beads for purification of wastewater after absorption of reflow exhaust gas. Chem. Eng. J. 2011;176–177:260–4.
[19] Lim LL, Lynch RJ, In SI. Comparison of simple and economical photocatalyst immobilization procedures. Appl. Catal. A. 2009;365:214-21.
[20] Li F, Xing Y, Ding X. Silica xerogel coating on the surface of natural and synthetic fabrics. Surf. Coat. Technol. 2008;202(19):4721–7.
[21] Mejía MI, Marín JM, Restrepo G, Rios LA, Pulgarín C, Kiwi J. Preparation, testing and performance of a TiO2/polyester photocatalyst for the degradation of gaseous methanol. Appl. Catal. B. 2010;94(1-2):166–72.
[22] Weenk GH. Microbiological assessment of culture media: comparison and statistical evaluation of methods. Int. J. Food Microbiol. 1992;17(2):159-81.
[23] Pakdel E, Daoud WA. Self-cleaning cotton functionalized with TiO2/SiO2: Focus on the role of silica. J. Colloid Interface Sci. 2013;401:1–7.
[24] Permpoon S, Houmard M, Riassetto D, Rapenne L, Berthomé G, Baroux B, et al. Natural and persistent superhydrophilicity of SiO2/TiO2and TiO2/SiO2 bi-layer films. Thin Solid Films. 2008;516(6):957–66.
[25] Martinez JR, Ruiz F. Mapeo estructural de sílica xerogel utilizando espectroscopia infrarroja. Revista Mexicana de Física. 2002;48(2):142-9.
[26] Jaroenworaluck A, Pijarn N, Kosachan N, Stevens R. Nanocomposite TiO2–SiO2 gel for UV absorption. Chem. Eng. J. 2012;181–182:45–55.
[27] Rincón AG, Pulgarin C. Effect of pH, inorganic ions, organic matter and H2O2 on E. coli K12 photocatalytic inactivation by TiO2: Implications in solar water disinfection. Appl. Catal. B. 2004;51(4):283–302.
[28] Pulgarin C, Kiwi J, Nadtochenko V. Mechanism of photocatalytic bacterial inactivation on TiO2 films involving cell-wall damage and lysis. Appl. Catal. B. 2012;128:179–83.
[29] Selishchev DS, Karaseva IP, Uvaev VV, Kozlov DV, Parmon VN. Effect of preparation method of functionalized textile materials on their photocatalytic activity and stability under UV irradiation. Chem. Eng. J. 2013; 224:114–20.