Rapid Probing of Self-Cleaning Activity on Polyester Coated by Titania-Natural Silica Nanocomposite Using Digital Image-Based Colorimetry

Diana R Eddy; Annisa Luthfiah; Muhamad D Permana; Yusi Deawati; M Lutfi Firdaus; Iman Rahayu; Yasuo Izumi

doi:10.1021/acsomega.2c07606

Rapid Probing of Self-Cleaning Activity on Polyester Coated by Titania-Natural Silica Nanocomposite Using Digital Image-Based Colorimetry

ACS Omega. 2023 Feb 15;8(8):7858-7867. doi: 10.1021/acsomega.2c07606. eCollection 2023 Feb 28.

Authors

Diana R Eddy¹, Annisa Luthfiah¹, Muhamad D Permana^{1

2}, Yusi Deawati¹, M Lutfi Firdaus³, Iman Rahayu¹, Yasuo Izumi⁴

Affiliations

¹ Department of Chemistry, Padjadjaran University, Jl. Raya Bandung-Sumedang Km. 21, Sumedang 45363, Indonesia.
² Center for Crystal Science and Technology, University of Yamanashi, Kofu, Yamanashi 400-8511, Japan.
³ Graduate School of Science Education, University of Bengkulu, Jl. W.R Supratman, Bengkulu 38371, Indonesia.
⁴ Department of Chemistry, Graduate School of Science, Chiba University, Yayoi 1-33, Inage-ku, Chiba 263-8522, Japan.

Abstract

Titania-silica nanocomposites (TiO₂-SiO₂) show outstanding performance and is very well applied in photocatalysis. In this research, SiO₂ extracted from Bengkulu beach sand will be used as a supporting material of the TiO₂ photocatalyst for application to polyester fabrics. TiO₂-SiO₂ nanocomposite photocatalysts were synthesized using the sonochemical method. The coating of the TiO₂-SiO₂ material on polyester was carried out using the sol-gel-assisted sonochemistry method. The method of determining self-cleaning activity uses a digital image-based colorimetric (DIC) method, which is much simpler than using an analytical instrument. The scanning electron microscopy-energy dispersive X-ray spectroscopy results showed that the sample particles adhered to the fabric surface and the best particle distribution was shown in pure SiO₂ and 1:0.5 TiO₂-SiO₂ nanocomposites. Analysis of Fourier-transform infrared (FTIR) spectroscopy proved the presence of Ti-O and Si-O bonds as well as the typical spectrum of polyester, which indicated that the fabric had been successfully coated with nanocomposite particles. The analysis of the contact angle of the liquid on the polyester surface showed a significant change in the properties of the TiO₂ and SiO₂ pure coated fabrics, but changes occur only slightly in the other samples. Self-cleaning activity against the degradation of methylene blue dye has been successfully carried out using DIC measurement. The test results showed that the best self-cleaning activity was shown by TiO₂-SiO₂ nanocomposite with a ratio of 1:0.5 with the degradation ratio reaching 96.8%. Furthermore, the self-cleaning property remains after the washing process, which shows excellent washing resistance.