Nanocrystalline TiO2 Coated-Fabric for UV Shielding and Anti-Bacterial Functions

2008 ◽  
Vol 569 ◽  
pp. 21-24 ◽  
Author(s):  
O. Nimittrakoolchai ◽  
Sitthisuntorn Supothina
Keyword(s):  
Optical Properties ◽  
Food Packaging ◽  
Tio2 Layer ◽  
Uv Shielding ◽  
Coated Fabric ◽  
Before And After ◽  
Qualitative Test ◽  
Coated Fabrics ◽  
Fabric Surface ◽  
Commercial Tio2

Due to excellent photocatalytic and optical properties of titanium dioxide (TiO2), it has been applied in several products such as food packaging plastics, materials for vehicles or for buildings and sunscreen-protecting cosmetics. In this present work, the synthesized as well as commercial TiO2 was coated onto a household curtain fabric for anti-microbial and ultraviolet (UV) shielding functions. The coating was performed by inducing the deposition of TiO2 layer from the Ti precursor onto the fabric surface pre-treated with silane adhesive agent so as to improve the adhesion. Ag nanoparticles were also incorporated in some samples to further improve the antibacterial function. Anti-bacterial activities of the coated fabric were evaluated by standard qualitative test (the Kirby-Bauer test (AATCC 147)). Efficiency for UV shielding was evaluated by measuring a UV-Vis reflection of the coated fabrics both before and after subjecting to several washing cycles. The result showed that the TiO2-coated fabrics developed had potential as antibacterial and UV shielding for the curtain industry.

Thermal resistance of polyurethane-coated knitted fabrics before and after weathering

2014 ◽  
Vol 84 (19) ◽  
pp. 2015-2025 ◽  
Author(s):  
Vesna Marija Potočić Matković ◽  
Ivana Salopek Čubrić ◽  
Zenun Skenderi
Keyword(s):  
Thermal Resistance ◽  
Thermal Protection ◽  
Winter Season ◽  
Outdoor Exposure ◽  
Woven Fabrics ◽  
Knitted Fabric ◽  
Knitted Fabrics ◽  
Coated Fabric ◽  
Before And After ◽  
Coated Fabrics

Polyurethane-coated knitted fabrics are of interest because they exhibit several positive properties, they are more stretchable, elastic and comfortable than coated woven fabrics and yet they are little studied. Information of weather durability, as well as thermal properties, is essential to ensure thermal protection for textile materials intended for outdoor use. In the presented research, a series of coated knitted fabrics for protective clothing were developed and exposed to weathering in summer and winter seasons. After three months of outdoor exposure, thermal resistance of all the tested materials decreased by 13% after the summer season and 25% after the winter season. A very good correlation of knitted fabric mass per unit area and thermal resistance of knitted fabric, coated fabric and aged coated fabric occurred. The studied materials experienced a partial degradation of the polyurethane layer, which is not related to the deterioration of the knitted substrate. The presented investigation of thermal resistance of coated fabrics and their dependence on the knitted substrate, as well as the influence of environmental conditions, allows the improvement of coated fabrics with the aim of better thermal protection.

The Evaluation Methods on the Wear Resistance of Magnetron Sputtering Coated Fabrics

2011 ◽  
Vol 332-334 ◽  
pp. 1154-1157
Author(s):  
Lei Wang ◽  
Xing Feng Guo
Keyword(s):  
Wear Resistance ◽  
Magnetron Sputtering ◽  
Process Conditions ◽  
Nylon Fabric ◽  
Coated Fabric ◽  
Large Fluctuations ◽  
Before And After ◽  
Weight Loss Method ◽  
Loss Method ◽  
Coated Fabrics

In order to find the appropriate method to appraise the wear resistance of coated fabrics, Ti film was manufactured on the nylon fabric in different process conditions through magnetron sputtering, and then methods of breakage, mass loss, transmissivity and the changes of grey value were used to analyze the wear resistance of coated fabric. The results show that: the test data of sample breakage method can not be easily collected. The weight loss method has a very small difference before and after rubbing, and the static electricity attracts dust during the friction process that adds the error of experimental results. The Gaps between the fabric yarns result in large fluctuations in the method of transmissivity. The change of grey value method reflects well with the wear of coated fabric after rubbing and is suitable for evaluating the wear resistance of magnetron sputtering coated fabric.

scholarly journals Effect of fixation conditions on yellowing behavior of cellulose powder–coated fabrics

2019 ◽  
Vol 14 ◽  
pp. 155892501982904
Author(s):  
Gizem Manasoglu ◽  
Mehmet Kanik ◽  
Kenan Yildirim
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Curing Temperature ◽  
Cellulose Powder ◽  
Spectroscopy Analysis ◽  
Surface Change ◽  
Coated Fabric ◽  
Powder Samples ◽  
Coated Fabrics ◽  
Fabric Surface

In this study, the yellowing behavior of cellulose powders, which is applied to pretreated polyester woven fabrics with concentrations of 100 g/kg by knife coating technique, was investigated. After drying process, coated fabrics were cured at different conditions to determine the effects of the curing temperature and time on yellowing behaviors. The yellowness–whiteness of coated fabrics was measured with a spectrophotometer according to ASTM E313. As the curing temperature and time increase, yellowing effect was more observable. However, the effect of temperature increase is found to be more significant than the increase in curing duration in terms of more observed yellowness. In order to investigate the reason of yellowing, cellulose powder samples were heated in drying oven at three different heating temperatures (130°C, 150°C, and 170°C) for three different heating periods (3, 5, and 7 min). Then, thermal gravimetric analysis and Fourier transform infrared spectroscopy analysis of powder samples were performed for each temperature–period combinations. No ring-opening reaction on the cellulose group was found in the Fourier transform infrared spectroscopy analysis. However, the changes in the spectra can be attributed to the chain breakage in the cellulose macromolecules as well as water loss from the molecular structure during the heating process. Microscopic and scanning electron microscopic analysis was carried out to see any surface change on the fiber and coated fabric. There was no detectable surface change on the fiber and coated fabric surface, apart from a color change on the fabric surface.

scholarly journals High Flame Retardant Performance of SiO2-TiO2 Sol Coated on Polyester/Cotton Fabrics

2021 ◽  
Vol 37 (1) ◽  
Author(s):  
Pham Thi Thu Trang ◽  
Le Ha Giang ◽  
Nguyen Ba Manh ◽  
Trinh Duc Cong ◽  
Ngo Trinh Tung ◽  
...  
Keyword(s):  
Flame Retardant ◽  
Titanium Chloride ◽  
Coating Materials ◽  
Sem Image ◽  
Coated Fabric ◽  
Tio2 Sol ◽  
Coating Method ◽  
Coated Fabrics ◽  
Fabric Surface

SiO2 and TiO2 sols were successfully synthesized by using sodium silicate and titanium chloride as Si and Ti sources. SiO2-TiO2 sol coated polyester/cotton fabric was fabricated by deep-coating method and using SiO2, TiO2 sols as coating materials. SiO2-TiO2 coated fabric were characterized by XRD, FTIR, TGA, SEM and EDX. From SEM image, it showed the SiO2, TiO2 particles of 20-30 nm which well deposited on fabric surface. TGA result revealed the significant improvement of thermal resistance and stability of SiO2-TiO2 coated fabric as compared to those of uncoated fabric. Flame retardant performance of SiO2-TiO2 coated fabrics was much better than that of uncoated fabric. Thus, SiO2-TiO2 coated fabric SiO2-TiO2 content of 26wt% showed the UL-94 classification of V-0 and LOI value of 30.3 were obtained. Moreover, mechanical property (tear strength) of SiO2-TiO2 coated fabrics were also improved.

scholarly journals Transparent TiO2/Cu/TiO2 Multilayer for Electrothermal Application

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 1024
Author(s):  
Jingjing Peng ◽  
Changshan Hao ◽  
Hongyan Liu ◽  
Yue Yan
Keyword(s):  
Optical Properties ◽  
Heating Rate ◽  
Figure Of Merit ◽  
Annealing Temperature ◽  
Critical Thickness ◽  
Experimental Results ◽  
Tio2 Layer ◽  
Electrical And Optical Properties ◽  
Partial Crystallization

Highly transparent indium-free multilayers of TiO2/Cu/TiO2 were obtained by means of annealing. The effects of Cu thickness and annealing temperature on the electrical and optical properties were investigated. The critical thickness of Cu mid-layer with optimal electrical and optical properties was 10 nm, with the figure of merit reaching as high as 5 × 10−3 Ω−1. Partial crystallization of the TiO2 layer enhanced the electrical and optical properties upon annealing. Electrothermal experiments showed that temperatures of more than 100 °C can be reached at a heating rate of 2 °C/s without any damage to the multilayers. The experimental results indicate that reliable transparent TiO2/Cu/TiO2 multilayers can be used for electrothermal application.

Optical Properties of Nano-Structure Tungsten-Doped Vanadium Oxide

2012 ◽  
Author(s):  
W. B. Cai ◽  
F. Wang ◽  
Y. P. Miao ◽  
J. Wei ◽  
K. L. Zhang
Keyword(s):  
Optical Properties ◽  
Transition Temperature ◽  
Oxide Film ◽  
Vanadium Oxide ◽  
High Vacuum ◽  
Infrared Transmission ◽  
Dc Magnetron Sputtering ◽  
Nano Structure ◽  
Before And After ◽  
Deposited Film

Tungsten-doped vanadium oxide has been proved to decrease the transition temperature, which enables vanadium oxide film to be more promising. Besides, the nano-structure can improve the properties of the film when compared with the as-deposited film. In this letter, a nano-structure tungsten-doped vanadium oxide film is proposed. Tungsten-doped vanadium oxide film was deposited on the Si (400) substrate by DC magnetron sputtering. The doping level was controlled by adjusting the sputtering time. Then the as-deposited film was annealed to form a nano-structure film at the temperature of 500 °C for 1 h in high vacuum. The morphology and crystalline structure of such films were characterized by AFM and XRD, respectively. Optical properties of the films were tested by FTIR, mainly comparing the infrared transmission before and after annealing.

scholarly journals Optical Properties of Polypropylene upon Recycling

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Felice De Santis ◽  
Roberto Pantani
Keyword(s):  
Optical Properties ◽  
Rheological Properties ◽  
Isotactic Polypropylene ◽  
Food Packaging ◽  
Polymeric Materials ◽  
Optical Characteristics ◽  
Cooling Rates ◽  
Commercial Grade

In the last few years there has been an increasing interest in the possibility of recycling polymeric materials, using physical recycling. However, is it well known that polymers experience a depletion of all the properties upon recycling. These effects have been widely characterized in the literature for what concerns the mechanical or rheological properties. The changes of optical properties after recycling have been much less studied, even if, especially in food packaging, optical characteristics (above all the opacity) are of extreme importance, and thus it is quite significant to assess the effect of recycling on these properties. In this work, the influence of recycling steps on the opacity of films of a commercial grade of isotactic polypropylene (i-PP) was studied. The material was extruded several times to mimic the effect of recycling procedures. After extrusion, films were obtained by cooling samples of material at different cooling rates. The opacity of the obtained films was then measured and related to their crystallinity and morphology. It was found that opacity generally increases on increasing the amount ofαphase and for the same amount ofαphase on increasing the size of the spherulites.

Mechanical properties of PVDF-coated fabric under tensile tests

2015 ◽  
Vol 35 (4) ◽  
pp. 377-390 ◽  
Author(s):  
Andrzej Ambroziak
Keyword(s):  
Mechanical Properties ◽  
Polyvinylidene Fluoride ◽  
Cyclic Load ◽  
Tensile Tests ◽  
Woven Fabrics ◽  
Uniaxial Tensile ◽  
Cyclic Tests ◽  
Comprehensive Investigation ◽  
Coated Fabric ◽  
Coated Fabrics

Abstract This article describes the laboratory tests necessary to identify the mechanical properties of the polyvinylidene fluoride (PVDF)-coated fabrics named Precontraint 1202S and Precontraint 1302S. First, a short survey of the literature concerning the description of coated woven fabrics is presented. Second, the material parameters for PVDF-coated fabrics are specified on the basis of biaxial tensile tests. A comparison of the 1:1 biaxial and the uniaxial tensile tests results is also given. Additionally, biaxial cyclic tests were performed to observe the change of immediate mechanical properties under cyclic load. The article is aimed as an introduction to a comprehensive investigation of the mechanical properties of coated fabrics.

Sign in / Sign up

Export Citation Format

Share Document