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

This systematic review aims at investigating different wound dressings commonly used for the healing process and skin repair. Five databases, namely SCOPUS, Web of Science, Medline, Google Scholar, and Cochrane Database of Systematic Reviews, up to 2020, were scanned for papers specific to the topic of concern. The blinded randomized controlled trials, in vivo and in vitro studies comparing common wound dressings, including traditional, natural/biological, and artificial ones were studied in the present review. Finally, the researchers selected 22 studies. From which the data related to the clinical features of wound dressings and their advantages and disadvantages) were derived. The review of literature suggests that many treatment combinations are utilized as wound dressings based on the wound type and hospital guidelines. Nevertheless, there are conflicting views about the most appropriate choice. The findings of the reviewed articles indicate that hydrogels are the most common wound dressing used for wounds and burns due to high thermal/mechanical stability and low water evaporation. However, it is suggested to apply hybrid hydrogel membranes to overcome the low mechanical strength of a single component

In this study, we tried to present an efficient method for removal of Reactive red 241 (RR241) from aqueous media, using a modified carbon composite with GO sheets. The prepared nanocomposites were then charcterizded by commonly identical techniques involve FESEM, BET and FT-IR. In removal studies, various parameters affecting the adsorption process including pH, time, adsorbent dose, temperature as well as the amount of GO in the constraction of composite were studied by respond surface method. The optimum conditions for removal of 100 mg/L of dye was pH of 5.0, time of 75 minutes and the adsorbent dose of 1.47 g/L containing 4.15 wt.% of GO. The maximum removal of 96% was also achieved under optimum conditions. Experiments showed that the adsorption was more consistent with the Langmuir equations and the maximum adsorption under this model was 160 mg/g. The results of the removal experiments showed that the amount of the adsorbent, GO content and pH had a significant effect on RR241 removal. BET analysis indicated that the addition of GO to the carbon composite structure improved the pore size, total pore volume, and effective surface area of the composite. Also, isotherms, kinetics and thermodynamic studies of adsorption were depicted that Langmuir isotherm model, pseudo-second-order kinetic model and self-adsorption are suitable models for RR241dye adsorption.

In this paper was investigated dyeability cotton fabric sample using surface modification to corona discharged method. At first ,In accordance with the design of experiments, We exposed the samples to Corona conditions with power of 100 (w) and the main current was 4A applied, at 60 and 300 secs and then dyed with Reactive Yellow K-RN Dyes. Then, scanning electronic microscope(SEM) was used to determine the effects of this operation on the surface morphology and also, a reflective spectrophotometer was employed to evaluate K/S , %R and L* a* b* values. Experiments indicated that dye stability of the samples were good and but with increased time of Corona after washing it was decline. Also, results showed that greater time of Corona operation at a constant pressure, enhanced cracks and pores on the surface morphology of the samples. As, Fourier transform infrared (FTIR) spectroscopy test displayed the effects of the Corona operation on the determination of Surface changes as well as changes in the existing functional groups in fabric after being wash and finally, the optimal conditions of the experiment were determined using the statistical method of Central Composite Design. In fact, aim of this study was to investigate the dyeing properties of cotton fabric and surface morphology changes using corona operation and to obtain optimal dyeing conditions. The results obtained in this research illustrated that optimize condition of cotton fabric samples dyed with the Reactive Yelow3 dye for K/S1 and K/S2 at F-value ,respectively, equal to 29879.53 and 15940.10,

Dye compounds are known as one of the most important environmental pollutants. Up to now, several methods have been offered to eliminate these pollutants from industrial wastes especially in the textile industry. A method that has received a great deal of attention in recent years is sono- electro- chemical method. In this study, using the Central Composite Design, the interactive effects of four important variables including pH, initial dye concentration, time and applied potential on sono- electro- chemical decolorization of Basic Blue 47 were optimized and investigated. Based on the obtained results in the absence oxidant agents, the best index for decolorization in optimal conditions including pH of 9.0, initial dye concentration of 303.3 μM, time of 93 min, and a potential of 0.81 V corresponding to the design by the CCD was 98%. It was experimentally found to be 96.0 %, and the Chemical Oxygen Demand (COD) was 97 %.

This study reports the antibacterial capability a low density polyethylene (LDPE) modified with ZnO nanoparticles using Sol Gel technique. Antibacterial activity of prepared films against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) was examined. The operational conditions such as pH, time, amount of ZnO nanoparticles and silanol concentration was optimized using respond surface methodology (RSM). The proposed film under optimum condition was applied for packaging of milk sample. The highest antibacterial activity of ZnO/LPDE were pH (6.0), time (103 min), amount of ZnO nanoparticles (0.68 % w/v) and silanol agent concentration (4.81 % v/v). The antibacterial properties of ZnO/LDPE films were assessed based on the diameter of inhibition zone in a disk diffusion test against E. coli and S. aureus. These films have significantly reduced the growth of mentioned bacteria. Overall, antimicrobial packaging shows promise as an effective method for the inhibition of certain bacteria include E. coli and S. aureus in milk. The resulting ZnO/LDPE package films containing Milk sample exhibit superior and prolonged antibacterial activity against E. coli and S. aureus during 7 and 14 days.

This study presents the findings of experiments on the impact of multi-walled carbon nanotubes on the pressure drop of the flow in helical annuli. The exterior of the heat exchanger is insulated. The nanofluid travels through the annulus as hot water flows through the inner helical tube. Two double-pipe cases are produced, each with a different curvature ratio. Several experiments are conducted to assess the effect of the coiled annuli geometry on the flow pressure drop. Additionally, the effects of the Dean Number and nanotube concentration are examined. The results indicated that the friction factors related to the nanofluid flow are higher than those of water, but our previous study demonstrated that they have superior heat transfer coefficients. Therefore, the performance evaluation criteria are achieved. In all the cases, they are higher than unity showing the superiority of this kind of heat exchanger.