Iranian Journal of Textile Nano-bio Modification
Volume:1 Issue: 3, Dec 2022

Using nitrosyl chloride reagent, supported by nano silica gel, some of the azo dyestuffs, based on α-naphthol and β-naphthol, was synthesized in a very short time at room temperature, with high efficiency, which reduced the corrosion of the pot, environmental pollutionand the other problems. The molecular structure of the synthesized dyestuffs was characterized by FTIR, 1HNMR, 13C-NMR and UV-Vis spectroscopic techniques.The results showed that the structure of the synthesized dyestuffs corresponded with the general structure of the dye azo, and the applications are categorized into disperse or acidic dyes. The synthesized dyestuffs were applied to dyeing nylon and polyester, as we explored the ability of dyeing. Also, according to the results obtained in washing stability, nylon and polyester fibers are equal in b and c , respectively, and are higher than other washing fastness measurement modes. In general, the Light fastness of polyester fibers is slightly better compared to nylon fibers and its washing stability is lower. Finally, results indicated that the new method had a good ability for producing the azo dyestuffs.

In this research, the simultaneous cross-linking and antibacterial finishing of bleached cotton and cationized cotton by 3-chloro2-hydroxy propyl tri methyl ammonium chloride (Quat -188) with butane tetra carboxylic acid (BTCA) and nano TiO2 was explored. Butane tetra carboxylic acid can be linked to the cellulosic chains by ionic and covalent bonds. To do this, different concentrations of nano TiO2 and BTCA were examined to obtain the highest cross-linking and antibacterial effects Various characteristics of samples such as antibacterial against different microorganisms like two gram-positive bacteria (Bacillus cereus, Staphylococcus aureus), one gram-negative bacteria (Escherichia coli), and one fungus (Candida albicans), crease recovery angle, bending length, yellowness index, weight changes, water drop absorption time were investigated. The results showed that both the bleached cotton, and cationized cotton can be finished by the optimum concentration of nano TiO2 and BTCA for producing a cotton fabric with anti-wrinkle and antibacterial properties.

Electro spraying is similar to electro spinning but when the viscosity of polymeric solution is not high enough to form nanofibers, electro spraying can be used to make nanoparticles .In this study Chitosan / gum tragacanth blend nanoparticles were produced using electro - spinning / sparying device and the chitosan and gum tragacanth concretions on properties of resulting nanoparticles was investigated . The morphology of electro - sprayed chitosan / gum tragacanth blend were characterized using scanning electron microscope (SEM) . The results showed that electro spraying technique is capable of forming gum tragacanth - chitosan blend nanoparticles with an average size of 200 to 300 nm . The miscibility of blend was determined using Fourier transform infrared spectrometer (FTIR) . Antibacterial property of samples was also investigated. Wettability results of gum tragacanth - chitosan nanoparticles ( Contact - angle measurements ) indicate hydrophilic property of nanoparticles which is needed for biocompatible applications.`

Sunlight causes to damage skin in the form of sunburns and skin cancer in comparison to exposure time because of including ultraviolet radiation (UVR). It is recommended application of sunscreen products and the use of proper clothing for skin protection from UVR. Therefore in this research the wool fabrics dyed by different dyes (Acid, Chrome and metal complex dyes) and the amount of UV-protection factor of dyed wool fabrics were investigated. The results revealed that the UV protection factor (UPF) of wool fabrics have increased just a little after dyeing. The UPF is increased from 2.7 to 4.4 for undyed and metal complex dyed samples, respectively. The other dyed samples have got the UPF as much as Benzophenone, a UV absorber. The amount of UPF displayed that the dyed wool fabrics have got weak UV-protection as well as the dyeing has not influenced significantly on UV-protection of wool fabric. .

With the emergence of the industrial age, the growing concern over environmental pollution has been to drug resistance in humans due to the use of antibiotics and their discharge in environment. The aim of this work was to synthesis of a carbon ceramic composite based on molecular imprinted polymers (MIP) particles via non-covalent procedure as selective adsorbent for removal of Cloxacillin (CLO) antibiotic from aqueous and biological media (MILK). The effect of operational parameters includes pH (3-10), contact time (1-120 min), MIP (0.1 – 5.0 %wt) and adsorbent dosage (0.1- 2.0 g/L) was studied for optimization of CLO removal condition. The synthesized MIP particles and fabricated carbon composites were characterized using scanning electron microscopy and nitrogen absorption/desorption (BET). The results showed that the removal efficiency was highest in neutral conditions and increased as amount of MIP particles increased. The optimum conditions for removal of CLO (94%) were determined at pH = 6.5, 87 minutes as contact time and the 1.6 g/L carbon composite contain 3.1 % wt MIP. The performance of the synthesized composites was evaluated for Cloxacillin removal from the milk sample. The performance of the MIP particles for the Cloxacillin removal of milk samples supplied from livestock showed that these adsorbents can help to effectively reduce the residues of drug contamination in dairy samples.

In the present research, nylon 6-silver (NS)/ Chitosan (CS)/Rosemary master-batch nanofibers was provided in order to be used in packaging food. Morphology and structure of the nanofibers was investigated using the Scanning Electron Microscope (SEM) and Fourier-transform infrared spectroscopy (FTIR). The antibacterial activity of synthetic nanofibers was evaluated for E. Coli and S. Aureus bacteria. The antioxidant activity of oxidant glucose of glucose oxidase and Rosemary as well as the function of the provided membranes in packaging and maintaining strawberry was investigated. Morphology and diameter of synthetic nanofibers were determined with SEM images. According to the results of the carried out investigations on the deterrent effect of silver on the activity of glucose oxidase of 70/30 NS-CS sample was selected as the optimum for subsequent studies, and based on the results, the highest enzyme activity (79.5%) with 0.05 grams of glucose oxidase was obtained. The antibacterial test of the membranes showed the perfect antibacterial activity of such membranes against the negative and gram-positive and gram-negative bacteria. In addition, the FTIR spectroscopy approved the presence of glucose oxidase, silver, and Rosemary in synthetic membranes.