In this study, functional cotton fabrics were prepared by applying titania as a photocatalyst and using silver nanoparticles as both a novel class of colorant for coloration and an agent capable of modifying the TiO 2 nanoparticles. Silver colloids with different colors were primarily synthesized through reduction of silver nitrate and then coloration of cotton fabrics and synthesis of Ag/TiO 2 nanocomposite on fabric surface was performed by adding titanium dioxide nanoparticles (P25) in an ultrasonic bath. The treated cotton fabrics were characterized by field emission scanning electron microscope, energy-dispersive X-ray spectroscopy, X-ray diffraction and UV-Vis reflectance spectroscopy. The color effect, self-cleaning property, antibacterial efficiency, ultraviolet (UV) blocking activity and hydrophobicity of the samples were also studied. The results indicated that all properties of the treated cotton fabric with Ag/ TiO 2 nanocomposite were superior compared to the treated sample with TiO 2 alone. Moreover, the photocatalytic activity of titanium dioxide has no negative effect on fabric color and the color variation of treated fabric after UV irradiation was negligible.
Fabrication of electro-conductive fi ber is a novel process. Nanocomposites of multiwall carbon nanotube/polyamide66 were produced by electrospinning with different amounts of multiwall carbon nanotube. Field emission scanning electron microscope and Fourier transform infrared spectroscopy of samples proved the existence of multiwall carbon nanotube distribution in polyamide 66 nanofi bers. Results showed that electro conductivity of electrospun multiwall carbon nanotube/polyamide 66 nano fi ber has increased in comparison with electrospun polyamide 66. Moreover, UV blocking of samples was investigated which has shown that using multiwall carbon nanotube in polyamide 66 increases UV blocking of fi bers. Furthermore, anti-bacterial activity of nanocomposite showed that these nanocomposites have antibacterial property against both Staphylococcus Aureus and Escherichia Coli bacteria according to AATCC test method.
Cross-link method has been used to load nano CeO2, ZnO, and TiO2 on the surface of cotton fabric. Three types of nanocomposite fabrics are prepared (cotton/CeO2, cotton/CeO2/ZnO, and cotton/CeO2/TiO2) and their properties were investigated. Field emission scanning electron microscopic (FESEM) images of the samples showed good distribution of nanomaterial, and energy dispersive X-ray spectroscopy (EDX) and X-ray fluorescence (XRF) samples proved the usage of amount of nanomaterials. On the other hand, elemental mapping was used to study the distribution of each nanomaterial separately. Antibacterial property of the samples showed excellent results against both Gram-negative and Gram-positive bacteria. Also ultraviolet (UV)-blocking of treated samples showed that all samples have very low transmission when exposed to UV irradiation.
Using carbon nanotubes (CNTs) in textile industry has attracted much attention due to its special properties. Also paper fibers and fabrics are the most important raw materials of textile. In this manuscript, paper yarns were weaved and treated with multi-wall CNTs (MWCNTs) in order to improve the physical properties of paper fabrics. In this regard, different percents of MWCNTs were coated on fabrics and some physical properties were investigated. Based on the results, paper fabrics treated with MWCNTs show excellent UV protection. The treated samples have more crease recovery. Also bending test and abrasion resistance analyses show improvements in treated fabrics. The adsorption test of samples shows an increase in water adsorption due to MWCNTs role of adsorbent. The results show a little decrease in strength that seems natural because of acidic pH of the used cross-link agent. In general, in addition to economic benefits of using paper fabrics, treating them with MWCNTs can also improve their physical properties.
Polymer nano fibers have gain much attention because of their fundamental importance in a wide range of applications such as filtration, tissue industry, medical science, drug carrier, biomedical applications and conductive yarns 1-5. Reduction of polymer fiber diameter in to nano scale gives rise to a set of desirable properties including an increase in surface-to-volume 6,7 , controlled release of drugs 8 , high anisotropic electrical conductivity 8,9 , and enhanced light scattering and photoluminescence 10. Based on earlier research results, electrostatic fiber spinning (electrospinning) is a
This study discusses the effect of corona pretreatment and subsequent loading of titanium dioxide nanoparticles on self-cleaning and antibacterial properties of cellulosic fabric. The corona-pretreated cellulosic fabrics were characterized by field emission scanning electron microscopy, and X-ray mapping techniques revealed that layers of the titania deposited on cellulose fibers were more uniform than the sample without pre-corona treatment. The self-cleaning property of treated fabrics was evaluated through discoloring dye stain under sunlight irradiation. The antibacterial activities of the samples against two common pathogenic bacteria including Escherichia coli and Staphylococcus aureus were also assessed. The results indicated that self-cleaning and antibacterial properties of the corona-pretreated fabrics were superior compared to the sample treated with TiO2 alone. Moreover, using corona pretreatment leads to samples with good washing fastness.
This study represents the extraction of keratin from hedgehogs spines doped with Harmaline and Ginkgo Biloba, and electrospun on the surface of cotton fabric (animal rights laws were performed). The field emission scanning electron microscopy (FESEM) was used to investigate the morphology of produced keratin Harmaline Ginkgo Biloba (KHG). The thermogravimetric analysis (TGA) shows the weight loss of samples in different temperatures. The aim and goal of producing KHG on the cotton fabric surface was to use as band aid; therefore, the bactericidal and anti‐inflammatory of samples were investigated. The results show that the KHG band aid has about 95% bactericidal properties against both gram‐positive and gram‐negative bacteria (Bacillus cereus and Escherichia coli). On the other hand, the results of oedema reduction on rats indicate that KHG band aid has good anti‐inflammatory property, which is near to the indomethacin. Furthermore, the MTT (3‐(4,5‐dimethylthiazol‐2‐yl)‐2,5‐diphenyltetrazolium bromide) analyses of KHG band aid and its cell viability demonstrate that the KHG band aid has very low cytotoxicity.
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