The sol–gel synthesis of cotton/TiO2 composites and their antibacterial properties

Abstract

Access to the published version may require journal subscription. Published with permission from: Elsevier.Standard set statement from the publisher: This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT AbstractPresent work is devoted to investigation of structure and functional properties of hybrid nanomaterials based on the TiO 2 -modified cellulose fibers of cotton. The titania hydrosol was successfully prepared using the titanium tetraisopropoxide as precursor and the nitric acid as peptizing agent via the low-temperature sol-gel synthesis in aqueous medium and applied to cotton fabric. For cross-linking of titania nanoparticles to cotton the 1,2,3,4-butanetetracarboxylic acid (BTCA) was used as a spacer. The morphology and composition of the surface pure and TiO 2 modified cotton fibers were investigated by the Scanning Electron Microscopy (SEM). The cotton/TiO 2 composite was characterized by the dielectric permittivity.For the estimation of total titania concentration, all samples were calcined at 650°C. The antimicrobial activity of the treated TiO 2 cotton fibers was investigated against Escherichia coli as a model Gram -negative bacteria after exposure to UV-irradiation for 10 minutes.

Bacteriostatic photocatalytic properties of cotton modified with TiO2 and TiO2/aminopropyltriethoxysilane

“…The insignificant changes in bacteria growth on the untreated illuminated and not illuminated samples proved that UV irradiation did not add to the antimicrobial effect. The E. coli growth reduction of 60 % obtained for the TiP coating was very similar to that observed for TiO 2 powder (P25 Aeroxide, Degussa), which represents an anatase-brookite modification (Kowal et al 2014), and nanocrystalline titania sol obtained by low-temperature sol-gel synthesis (Galkina et al 2014). It should be noted that, despite being amorphous, the TiP/ APTES hybrid finishes also showed a photocatalytic bacetriostatic effect, which is much more pronounced for crystalline anatase modification than for the Table 2 clearly indicate very good and durable bacteriostatic activities of the TiP and TiP/APTES coatings that were enhanced by UV irradiation.…”

Cellulose nanofiber–titania nanocomposites as potential drug delivery systems for dermal applications

“…This approach, however, has potential to open endless possibilities for creation of new efficient drug delivery systems with a whole range of functional properties. Previously, we obtained TiO 2 /cotton composites with high photocatalytic and antibacterial activity 28,29 . The aim of the present work was to develop potential application of the nanocomposites based on cellulose nanofibers and grafted titania as drug delivery system.…”

Comparative study of the effects of anatase and rutile titanium dioxide nanoparticles on the structure and properties of waterborne polyurethane

“…Nowadays, being used as inorganic additive into polymers has attracted much more attention [3][4][5]. The addition of nano-TiO 2 into polymers can not only improve the UV resistance [6] and mechanical properties [7], but also endows some functional properties, such as photocatalytic antibacterial [8,9] and photocatalytic self-cleaning [10][11][12].…”