Microwave-assisted TiO2: anatase formation on cotton and viscose fabric surfaces

Abstract

The method of TiO 2 -anatase film preparation on cotton and viscose fabric surfaces using the sol-gel process and microwave treatment is presented. Microwave treatment was used to change the amorphous TiO 2 form to anatase directly on the fabrics. The influence of microwave treatment conditions on the obtainable polymorphic form of TiO 2 was examined. Fabrics were pretreated with low-temperature air plasma (30 min). The root mean square height in the selected area increased from 44 to 166 nm (cotton) and from 9 to 112 nm (viscose). Infrared analysis showed the new band at 1748 and 1732 cm -1 corresponding to C=O stretching for plasma-treated cotton and viscose textiles, respectively. The plasma pretreatment also improved the wetting properties by TiO 2 sol and increased the surface free energy of fabrics. TiO 2 film thickness was 180 nm (12 %wg. Ti) and 140 nm (3 %wg. Ti) for cotton and viscose, respectively. TiO 2 -modified cotton reduced the nicotine concentration three times more and TiO 2 -modified viscose was two times higher under sunlight compared to raw fabrics. No changes in strength were observed for TiO 2 -modified cotton, while the strength of TiO 2 -modified viscose decreased about 45 %. No effect of UV irradiation on cotton and a slight reduction of the strength of raw viscose (7 %) and TiO 2 -modified viscose (16 %) were observed. The Ti contents after washing decreased from 12 to 11 % (cotton) and from 3 to 2.6 % (viscose). The presented method allows obtaining TiO 2 film-anatase on the cotton and viscose fabrics, but its total effectiveness is better for cotton fabrics.

Investigation on functionalization of cotton and viscose fabrics with AgNWs

“…The breaking elongation for CO and CO10AgNW fabrics is 10.2 and 9.90%, respectively, and for CV and CV15AgNW fabric is 19.40 and 19.90%, respectively. Similar results of lower strength viscose fabric after modifications (among others with TiO 2 ) were observed in our previous work (Giesz et al 2016). …”

“…The 3D pictures of unmodified CO and CV fabric surfaces and the roughness parameters were shown by Giesz et al (2016). Obtained by this research team, the value of the root-mean-square height in the selected area (S q ) for unmodified CO and CV was 44 and 9 nm, respectively.…”

“…The differences in the results of AgNW application, durability of the modification effect and changes of tensile strength for two cellulose fabrics are related to the variety of their morphological and topographical structures, discussed by Giesz et al (2016).…”

Influence of corona discharge on the surface and thermal properties of aramid fabrics

“…Consequently, the surface roughness and wettability increased. Generally, plasma treatment changes the physicochemical properties of modified textile materials by creating new functional groups and shaping surface topography, and thus can change the wettability and adhesion …”

Visible-Light-Driven, Dye-Sensitized TiO2 Photo-Catalyst for Self-Cleaning Cotton Fabrics

“…Figure 3a represents the spectrum of pure cotton fabric. The peaks at around 3289 cm −1 , 2879 cm −1 , 1318 cm −1 and 1038 cm −1 are associated with the hydroxyl groups (-OH) of cellulose, C-H stretching vibrations of the cellulose chains in the cotton fabrics, C-O, C-H bending vibrations, and C-O, O-H stretching vibrations of the polysaccharide in cellulose respectively [29][30][31]. The FTIR-ATR spectrum of the TiO 2 -coated cotton fabric is presented in Figure 3b.…”