Enhanced Fibroblasts Functions in a New Family of Hierarchically Organized Nanohybrid Elastomers

TiO 2 nanoparticles have been synthesised using sol-gel technique by titanium tetraisopropoxide (C 12 H 28 O 4 Ti,) as a precursor. The particle has been modified using 3-aminopropyltriethoxysilane as a surface modifier. The unmodified and modified particles were characterise for size and distribution using a particle size analyser, which works on dynamic light scattering principle. The particles have been applied on polyester/cotton woven fabric for various concentrations of nanoparticles. The treated fabric has been characterised for protective properties such as antimicrobial activity (against Staphylococcus aureus, Klebsiella pneumonia and Escherichia coli) and ultraviolet protection factor (UPF) factors and for easy care properties such as soil release and self-cleaning behaviours. The functionality of the treated fabric was studied and also tested for durability for repeated wash cycles. The particle size of unmodified and modified TiO 2 have been found to be 25 and 18 nm respectively. The treated samples with modified TiO 2 have shown higher antimicrobial activity. Self-cleaning effect of the modified TiO 2 treated fabric has been found to be notably higher than the unmodified TiO 2 treated fabric. Soil release effect, which was studied subjectively, also showed improved performance for those fabrics treated with modified nano-TiO 2 . The UPF results of the unmodified and modified nano-TiO 2 fabric did not have notable differences but were almost the same. Both unmodified and modified TiO 2 treated fabrics have shown the::deceasing treated in all the functional properties studied; however, the rate of decrease was low up to the tenth wash, and then, it became notable at the fifteenth and above wash cycles. The surface light reflection characteristics, through whiteness index of the unmodified TiO 2 treated fabrics, were also found to be at increasing trend with treatment concentration.

Section: Antimicrobial Screening For Fabricsmentioning

confidence: 96%

Evaluation of multifunctional properties of polyester/cotton blend treated with unmodified and modified nano-TiO₂particles

Sivakumar

Ramu

Periyasamy

2016

“…Moreover, the increase in annealing temperature significantly enhances the photocatalytic and antimicrobial performance, which are related to a decrease in the band gap energy of titania. [8][9][10][11][12][13][14][33][34][35][36][37][38]…”

Section: Optical Characterisationmentioning

confidence: 99%

Influence of annealing temperature on structural, morphological and optical properties of nanostructured TiO₂thin films

Sönmezoğlu

Çankaya

Serin

2012

Thermal annealing is widely used to improve crystal quality, which affects electrical and structural properties by reducing study defects in materials. Therefore, enormous research efforts were focused on the control of material surface nanostructure through annealing processes, which is of interest for various technologies. However, no work providing a detailed explanation for the structural, morphological and optical parameters of nanostructured TiO 2 thin films deposited on glass at temperature above 500uC by the sol-gel dip coating method has been presented to date. In this work, we have grown nanostructured TiO 2 thin films by sol-gel dip coating method on glass substrates at room temperature and studied the effects of annealing temperature from 200 to 700uC on optical performance, microstructural changes and surface morphology evolution. The results of this work may be summarised as follows: the X-ray diffraction results show that annealed TiO 2 thin films have anatase crystal structure, and the intensities of the peaks of the crystalline phase increased with the increase in annealing temperature; from atomic force microscopy images, distinct variations in morphology of the thin films were also observed; and optical results show that TiO 2 films exhibit high visible transmittance, and it has a maximum transmittance of ,93?61% at 500uC annealing temperature. The optical band gap of the as grown thin films decreases from 3?68 to 3?31 eV with the increase in annealing temperatures. The TiO 2 thin film annealed at 500uC has the best optical property. The change in structural, morphological and optical properties with annealing temperature demonstrates that this material has a potential to be used as a novel technology such as nanoelectronics and possibly nano-optoelectronic devices based on nanomaterial for insulating, semiconducting and electron and/or hole blocking layer, etc.

“…In the past several years, many approaches have been applied in synthesising NTs, such as SnO 2 , TiO 2 and ZnO. [1][2][3][4][5] Mixed oxides have been researched for practical application in optical and electric devices, gas sensors, catalytic and photocatalytic materials, 6 antimicrobial activity, 7-13 soft tissue engineering 14,15 and so forth. Among the coupled semiconductor materials, many efforts have been devoted the SnO 2 -TiO 2 nanomaterial system.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterisation of TiO₂–SnO₂binary oxide nanotubes

Ma¹,

2012

The nanotubular architectures of metal oxides have emerged as a fascinating class of nanomaterials because of their superior performance in numerous applications, such as gas sensing, drug delivery and electronic and optoelectronic device. One of the most powerful and now extensively synthesising methods for nanotube (NT) structures relies on solid state templates and sol-gel to control the diameter and length of nanostructures. Among the metal oxides, TiO 2 and SnO 2 are the functional semiconductor oxides for their wide applications in nanodevice. It is meaningful to prepare the TiO 2 oxide NT compositing the SnO 2 component. In this work, the synthesis of nanotubular architectured composite materials consisting of TiO 2 and SnO 2 by the combination of the sol-gel chemical method and the anodic aluminium oxide templating method is reported. The method can control the diameter and tube end morphology, and the as obtained products were characterised by X-ray diffractometry, scanning electron microscopy, transmission electron microscopy and energy dispersive X-ray spectrometry. The diameter of the composite NT is y150 nm with open tube end. The composite NTs are composed of mixed oxides of Sn, O and Ti. The mechanisms of formation of NTs have been elucidated. The reported results are expected to have a significant impact on synthesising other binary oxide NTs.