The antimicrobial activity of triangular silver nanoplates on cotton fabric pretreated with chitozan

Triangular silver nanoplates are a type of most-studied noble-metal nanostructures over the past decade, owing to their special structural architecture, outstanding plasmonic features across both visible and IR regions, and catalytic properties for a wide range of applications. Herein, we used these nanoparticles to deposit on cotton (Co) fabric pretreated with biopolymer chitosan (CHT) and investigated their antimicrobial activity. The antimicrobial efficiency of the coated fabrics was evaluated toward Gram-negative bacteria E. coli, Gram-positive bacteria S. aureus and fungus C. albicans. It was found that deposited silver nanoparticles imparted excellent antimicrobial properties to Co fabric

Impedance analysis of milk quality using functionalized polyamide textile-based sensor

Present paper demonstrates design and characterization of a textile based microfluidic chip sensor for the detection of milk adulteration through measuring the real part of the impedance and impedance phase angle. Polyamide (PA) based textile fabric was chemically functionalized with polyaniline and titanium dioxide nanoparticles (PANI/TiO2) nanocomposite and embedded in the microfluidic chip. Prototyping of microfluidic chip was performed by xurography and hot lamination using polyvinyl chloride foils. Morphological and chemical properties of fabricated textile-based PA-PANI/TiO2 chip sensor were evaluated by scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). Quality of milk was accessed with fabricated textile sensor using cow and goat milk samples. The electrochemical impedance spectroscopy (EIS) was applied to detect the change in resistance and phase angle of pure and diluted milk. The developed PA-PANI/TiO2 chip sensor acted as a variable resistor that was able to identify adulterations and spoilage of the milk samples with sensitivity of 0.06 degrees of phase angle variation per % of water dilution. Our work promises that application of textile electronics could be efficiently exploited for food safety, point-of-care and environment monitoring applications

Antimicrobial activity and cytotoxicity of silver-based nanoparticles in situ synthesized on cotton fabric using walnut leaf

U ovom radu je ispitana mogućnost in situ sinteze nanočestica na bazi srebra primenom ekstrakta lista oraha, na pamučnoj tkanini prethodno modifikovanoj limunskom kiselinom. Tokom sinteze su formirane sferne nanočestice prečnika oko 60 nm, koje su ravnomerno raspoređene po površini pamučnih vlakana. Prisustvo nanočestica na bazi srebra je obezbedilo odličnu antimikrobnu aktivnost prema bakterijama Staphylococcus aureus i Escherichia coli, kao i kvascu Candida albicans. Tekstilni nanokompozitni materijal nije citotoksičan prema ćelijama zdravih keratinocita kože (HaCaT linija) i zdravih fibroblasta (MRC-5 linija), što omogućava njegovu bezbednu primenu za medicinske potrebe.This study discusses the possibility to utilize walnut leaf extract for in situ synthesis of silver-based nanoparticles on cotton fabric previously modified with citric acid. Synthetized spherical nanoparticles with an average diameter of 60 nm were evenly distributed over the surface of cotton fibers. The presence of silver-based nanoparticles provided excellent antimicrobial activity against bacteria Staphylococcus aureus and Escherichia coli, and yeast Candida albicans. The textile nanocomposite did not show any cytotoxicity towards healthy skin keratinocytes cells (HaCaT line) and healthy fibroblast cells (MRC-5 line). Thus, it could be considered as a safe for potential medical applications

Recycled wool-based nonwoven material for removal of basic dyes from water

U ovom radu je ispitana mogućnost primene netkanog materijala na bazi vune kao sekundarne sirovine za uklanjanje baznih boja C.I. Basic Yellow 28 i C.I. Basic Red 46 iz vode. U cilju poboljšanja sorpcionih svojstava materijal je obrađen biopolimerom hitozanom i vodonikperoksidom. Ispitana je kinetika sorpcije kao i uticaj početne koncentracije boje i pH na sorpcioni kapacitet materijala. Rezultati su pokazali da se netkani materijal na bazi vune kao sekundarne sirovine može koristiti kao efikasan sorbent za uklanjanje ispitivanih baznih boja iz vode. Obrada vodonik-peroksidom značajno je poboljšala sorpciona svojstva materijala za obe boje. Materijal obrađen hitozanom se ponaša slično kao neobrađen materijal. Povećanje početne koncentracije boje i pH pozitivno utiču na sorpciju baznih boja na materijalu.The aim of this study was to investigate the potential use of recycled wool-based nonwoven material for removal of basic dyes C.I. Basic Yellow 28 and C.I. Basic Red 46 from water. To improve the sorption properties, the material was treated with biopolymer chitosan and hydrogen peroxide. The sorption kinetics and the influence of initial dye concentration and pH on the sorption capacity of the material were studied. The results indicated that recycled wool-based nonwoven material can be used as an efficient sorbent for removal of investigated basic dyes. Hydrogen peroxide treatment considerably improved the sorption properties of the material for both dyes. The chitosan treated material showed similar sorption behaviour to that of the untreated material. The increase of initial dye concentration and pH positively affected the sorption of basic dyes

The toxicity of basic dyes solution after the sorption on recycled wool-based nonwoven material treated by hydrogen peroxide

U ovom radu je ispitana akutna toksičnost rastvora baznih boja C.I. Basic Yellow 28 i C.I. Basic Red 46 pre i posle sorpcije na netkanom materijalu na bazi vune kao sekundarne sirovine, koji je obrađen vodonik-peroksidom. Akutna toksičnost boja je utvrđena korišćenjem biološkog testa ToxAlert® 100, koji je baziran na inhibiciji bioluminescencije bakterije Vibrio fischeri. Određeni su procenat inhibicije (%I) pre i posle sorpcije, 50% efektivna koncentracija (EC50) i jedinice toksičnosti (TU). Procenat inhibicije i vrednosti parametara EC50 i TU su pokazale da je boja C.I. Basic Yellow 28 značajno toksičnija od C.I. Basic Red 46. Posle tri sata sorpcije na netkanom materijalu obrađenom vodonik peroksidom, toksičnost rastvora boje C.I. Basic Yellow 28 se neznatno smanjila, dok je rastvor boje C.I. Basic Red 46 postao netoksičan.The aim of this study was to determine the acute toxicity of basic dyes C.I. Basic Yellow 28 and C.I. Basic Red 46 solutions before and after the sorption on recycled wool-based nonwoven material, which was treated by hydrogen peroxide. The acute toxicity of dyes was evaluated using a ToxAlert® 100 biological test, which is based on inhibition of the bioluminescence of bacteria Vibrio fischeri. The percent of inhibition (%I) before and after the sorption, 50% effective concentration (EC50) and toxicity units (TU) were determined. The percent of inhibition, EC50 and TU values showed that C.I. Basic Yellow 28 was considerably more toxic than C.I. Basic Red 46. After 3 h of sorption onto the hydrogen peroxide treated material, the toxicity of C.I. Basic Yellow 28 solution slightly decreased, whereas C.I. Basic Red 46 solution became nontoxic

The Study of Sorption of Toxic Basic Dyes from Aqueous Solutions on H2O2 Treated Recycled Wool-based Nonwoven Material and Related Toxicity Analysis

The aim of this study was to investigate the potential use of recycled wool-based nonwoven material for removal of basic dyes C.I. Basic Yellow 28 and C.I. Basic Red 46 from aqueous solutions, To improve the sorption properties, the recycled wool-based nonwoven material was treated with hydrogen peroxide. The sorption capacity, the sorption kinetics, and the influence of initial dye concentration and pH on the sorption were studied. The acute toxicity of dyes was evaluated using a ToxAlert (R) 100 biological test, which is based on inhibition of the bioluminescence of Vibrio fischeri. The percent of inhibition (%I) before and after the sorption, 50% effective concentration (EC50) and toxicity units (TU) were determined. The results indicated that recycled wool-based nonwoven material can be used as an efficient sorbent for removal of investigated basic dyes. Hydrogen peroxide treatment considerably improved the sorption properties of the material for both dyes. The sorption kinetics of dyes on the hydrogen peroxide treated material obeyed pseudo-second order kinetic model. The Freundlich sorption isotherm was found to represent well the experimental sorption data. The increase of initial dye concentration and pH positively affected the sorption of basic dyes. An ion exchange mechanism of dye sorption was confirmed by desorption studies. The toxicity decreased after the sorption of both dyes

Plasma-induced Decolorization of Indigo-dyed Denim Fabrics Related to Mechanical Properties and Fiber Surface Morphology

The aim of this study was to investigate how morphology of fibers is affected by plasma during the process of decolorization by a low-pressure RF plasma (gas, treatment time, and power were varied) and atmospheric pressure industrial corona (number of passages and power). CIE LAB colorimetric system was used for determination of color difference between untreated and differently plasma-treated denim fabrics. Particular emphasis was put on the morphological changes induced by plasma treatment, because they indicate changes in mechanical properties of the fabrics. The morphology of plasma-treated fibers was analyzed by scanning electron microscopy (SEM). SEM images revealed that, when plasma conditions that lead to a decolorization were chosen, specific fiber surface changes were always observed in the form of submicrometer-sized striations, pits, and cracks. Mechanical properties of denim fabrics were moderately influenced by treatment conditions. The results indicated that decolorization was highly affected by plasma parameters and desired worn look effects could be designed by adequate control of plasma processing while paying attention to limiting the plasma-induced damage

Recycled wool-based nonwoven material for decolorisation of dyehouse effluents

Purpose - The purpose of this paper is to investigate the possible application of recycled wool-based nonwoven material (RWNM) for removal of different dyes that are used in textile dye houses. Design/methodology/approach - The sorption kinetics, the influence of initial dye concentration, pH and temperature are analyzed. Basic, reactive, direct and metal complex dyes are studied. Findings - The sorption properties are highly influenced by the type of the dye owing to differences in their chemical structure and thus, the mechanism of binding to wool. Modification of material with chitosan and hydrogen peroxide improves the sorption capacities and sorption rates but no general trend can be established. Consequently, the sorption behaviour is analyzed separately for each type of the dye. Originality/value - The results indicate that RWNM can be used as an efficient, low-cost Sorbent for decolorisation of effluents

Use of modern methods of fibre surface modification to obtain the multifunctional properties of textile materials

The modern textile fibre treatments aim to obtain the required level of beneficial effect while attempting to confine the modification to the fibre surface. Recently, much attention has been focused on different physical methods of fibre surface modification, cold plasma treatment being considered as very useful. Moreover, there are efficient chemical methods available, such as peroxide, biopolymer and enzyme treatment. Some interesting combinations of these physical and chemical surface modification methods as means to modify fibre surface topography and thus controlling the surface-related properties of the fibre are presented in this paper. The properties obtained are discussed on the basis of the physico-chemical changes in the surface layer of the fibre, being assessed by wettability and contact angle measurements, as well as by FTIR-ATR and XPS analysis. The SEM and AFM technique are used to assess the changes in the fibre surface topography and to correlate these changes to the effectiveness, uniformity and severity of the textile fibre surface modification treatments

Sustainable non-woven sorbents based on jute post-industrial waste for cleaning of oil spills

Intensified oil exploitation accompanied with frequent oil spills having a detrimental impact on ecosystems are seeking efficient, environmentally and economically feasible solutions. In an attempt to develop an efficient, reusable, biodegradable and cheap sorbent for oil clean-up non-woven sorbents based on recycled jute post-industrial textile waste were fabricated. The influence of area density of non-woven sorbents and hydrophobicity of fibers on overall oil sorption performance was the focus of this research. All sorbents showed a good reusability after five sorption cycles and buoyancy in water even after 24 h independently of sorbent structure. The area density of sorbents and viscosity of studied oils (crude oil, diesel oil and two types of motor oils) highly affected the oil sorption capacity and oil retention. The sorbent with the lowest area density exhibited the best oil sorption performance. The esterification of jute with stearic fatty acid contributed to decrease in water uptake of sorbents but also to negligible change of oil sorption behavior indicating that the structure of the sorbent in this case plays a crucial role