Search

This study investigates the potential of Prangos ferulacea, as a sustainable flavonoid-based natural dye source for textile dyeing, UV protection, and antioxidant finishing. It examines the influence of dyeing conditions, and various mordant types, and evaluates their respective impacts on color characteristics, mechanical properties, antioxidant and UV protection properties. Quantitative analysis reveals the distinct yellow hue achieved through the use of aerial parts extract of P. ferulacea extract, with hues ranging from 70° to 96°, producing warm tones. In general, different natural mordants, when combined with specific metal mordants, create color variations. However, in particular, combinations of iron and copper mordants provide the most intense colors. Comprehensive color fastness assessments highlight the good washing and light fastness of aerial parts extract with copper and iron biomordant combinations. FT-IR and SEM analysis of undyed and dyed wool yarns provided additional support to the current dyeing results of enhanced color shade and high color depth values. Furthermore, the two-step mordanting and subsequent dyeing process provide a sustainable way of enhancing the shade range on wool fiber with 75.0% (o.w.f.) P. ferulacea aerial parts extract without any significant damage (tensile strength) to the surface of the wool. Wool yarns dyed with P. ferulacea whole plant extract showed enhanced antioxidant and UV protection properties, potentially enhancing the sustainability of textile products such as medical textiles and UV-protective clothing which in turn reduces the need for synthetic chemical agents in textiles. P. ferulacea emerges as a promising natural colorant, offering attractive hues, antioxidant, and UV protection benefits for sustainable textile dyeing. [ABSTRACT FROM AUTHOR]

Cellulosic fabric finishing via silver nanoparticles to develop antimicrobial properties and to upsurge its esthetic worth is flourishing in the textile industry. To contribute this research effort, the current project was conducted for the application of starch-embedded stable silver nanoparticles on cotton fabric before and after dyeing using a newly synthesized heterofunctional reactive dye. SEM imaging was used to check the morphological changes in cellulose polymeric structure after silver nanoparticles loading. Interaction between silver nanoparticle finishing and dyeing properties (colorimetric, fastness, and UV protection) of samples was explored and delineated. Silver-loaded cotton samples retained antimicrobial activities even after five laundry actions and pre- and post-dyeing treatment had no significant effect on the antimicrobial activity. Superb color buildup of samples revealed that silver nanoparticles should be applied before dyeing because pre-application of nanoparticles would increase the active surface area of cotton fabric which increased color strength and esthetic quality of fabric. Fastness properties and UPF of dyed cellulosic fabric were improved due to silver nanoparticles finishing. Future perspectives of the current study comprised the application and assessment of dyeing properties of new heterofunctional azo reactive dye on polyester cotton (PC) fabric. [ABSTRACT FROM AUTHOR]

Yellow emission zinc oxide (ZnO) quantum dots were prepared by hydrolysis of zinc acetate dehydrate and potassium hydroxide in methanol solution. The structure and luminescence of the ZnO nanoparticles were investigated through X-ray diffraction, Fourier transform infrared attenuated total reflection and fluorescence spectrophotometer. The UV-blocking coating was deposited on the surfaces of cotton fabrics by water-based self-assembly between cationized cotton fabrics and ZnO quantum dots as well as graphene oxide. The UV-blocking property of as-coated cotton fabrics was evaluated by UV protection factor (UPF). Even after 20 consecutive launderings, the UPF value of the resultant cotton fabric still reached 57.6, suggesting promising potential as UV protective materials and excellent laundering durability. [ABSTRACT FROM AUTHOR]

In recent years there is progressive research conducted on modification of textile and nanoparticles for long-lasting performances without compromising the sensorial and non-sensorial comfort. The appropriate finishing treatment of textile is of great concern to impart comfort along with durable multifunctional characters. The main objective of this study was to achieve the durable functionality without compromising the comfort and physical properties of cotton fabric. TiO2 nanoparticles have been modified with two different silane coupling agents such as (3-Glycidoxypropyl)trimethoxysilane (GPTS) and 1,2-Bis(triethoxysilyl)ethane (BTSE) using different concentrations. The modified nanoparticles were characterized using Scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA) to confirm the modification and fixing of chemicals at the surface. Modified nanoparticles were applied on textile by pad-dry-cure method. The treated cotton fabrics were washed to confirm the adhesion of nanoparticles after several washing cycles. The durable ultraviolet (UV) blocking capabilities were analyzed before and after washing. Then, comfort properties were evaluated and compared to made selection of best silane coupling agent having minimum effect on inherent properties of cotton textiles. [ABSTRACT FROM AUTHOR]

Deterioration of polyamide 6 fabrics upon exposure to ultraviolet radiation for a long time is an acute dilemma. Imparting ultraviolet protection to polyamide fabrics is of prime importance from the performance and economic point of views. In this investigation, polyamide 6 fabrics were modified with an environmentally friendly product (sericin) in presence or absence of crosslinking agents; namely citric acid or epichlorohydrin using pad-dry-cure technique. Topographical investigation of the used sericin powder was conducted using transmission electron microscopy (TEM). The morphological structure of treated as well as untreated fabrics was investigated using high resolution field emission scanning electron microscope (FE-SEM). The alteration in some physico-mechanical characteristics of the treated polyamide 6 fabrics; Viz. bending stiffness, burst test, degree of yellowness, and moisture regain were assessed. The treated polyamide fabrics were dyed with acid and reactive dyestuffs. The colour strength and washing fastness for dyed fabrics with both acid and reactive dyes were assessed. The photo-protection against UV light of the said fabrics were evaluated. The treated fabric exhibited excellent UV protection without significant discrepancy in their inherent physico-mechanical properties. [ABSTRACT FROM AUTHOR]

Linen fiber, which is claimed to be more comfortable than cotton, is an important textile fiber obtained from Linum usitatissimum (Flax) plant. However, the lack of functional properties of linen limits its application in functional textile products. Nowadays, use of natural colorant for textile dyeing has become an attractive option for sustainable textile coloration. Kapok flower is an unexplored source of natural dyestuff which can also be utilized for functionalization of cellulose-based textiles. In the current work, kapok flower extract (KFC) was utilized as a functional dye for dyeing of linen fabric in the presence of metallic mordants. The dyed fabrics were evaluated for coloration properties (color values, color coordinates, and fastness properties) as well as functional properties viz. antibacterial activity, UV protection, and antioxidant activity. The satisfactory level of dyeing with acceptable fastness ratings was achieved on linen fabrics. The dyed fabrics displayed an excellent antibacterial activity against gram-positive and gram-negative bacteria. The efficient level of UV protection and radical scavenging (antioxidant activity) was also obtained. The mechanism of functional modification of linen using KFC was discussed. [ABSTRACT FROM AUTHOR]

In this study, natural dyes were extracted from five plants, namely diospyros kaki, dioscorea cirrhosa, millettia ( jixueteng), ecliptae, and macrocarpa nucuma, using environmentally-friendly solvents, including ethanol and deionized (DI) water. A plant mordant, tannin extracted from Emblica officinalis G., and a metal mordant, copper sulfate, were used in the pre-dyeing process. Cotton and silk fabric samples were treated using the five natural dyes without and with mordanting for comparison on their color strength and characteristics as well as protection against ultraviolet radiation (UVR). Results revealed that Emblica officinalis G. had the highest total phenol content, followed by dioscorea cirrhosa. The presence of abundant phenolic groups in the natural dyes and mordant makes them effective coloration agents for fabrics. Cotton and silk fabrics dyed using ecliptae without pre-mordanting had the highest K/ S values. Silk fabrics had higher K/ S values than cotton fabrics, indicating greater color strength in pre-mordanted silk treated with DI water-extracted dyes. Natural mordant used before treatment with natural dyes contribute to significant enhancement in color strength, and Emblica officinalis G. alone could darken the color of cotton and silk fabrics dyed with plant pigment. Moreover, treatment with natural dyes after mordanting can increase ultraviolet protection factor (UPF) and the enhancement in UVR protection is greater and more significant in cotton fabrics than in silk fabrics, and in fabrics treated with DI water-extracted natural dyes than in those treated with ethanol-extracted ones. In conclusion, pre-dyeing with natural mordant followed by treatment with natural dyes extracted using environmentally-friendly solvents can enhance significantly K/ S and UPF, offering directions for manufacturing textiles without environmental hazards but with good appearance and health benefits. [ABSTRACT FROM AUTHOR]

High performance cellulosic fabrics are of increasing attention as a wearable fabric with special functions. The current report deals with preparation of multifunctional cotton fabrics by using simple and facile layer by layer technique. Firstly, silver nitrate was reacted with carboxymethyl cellulose to prepare Ag nanoparticles-carboxymethyl cellulose composite. Multi-layers of the so-obtained composite were applied on the cotton fabrics using pad-dry-cure method. Ag nanoparticles were deposited with mean size of 18.2 nm onto cotton fabrics which served as a cross linker between carboxymethyl cellulose macromolecules and cotton macromolecular blocks. Application of composite multilayers brought new properties for the finished cloths such like coloration, ultraviolet resistance, electrical resistance and biocidal action. The ultraviolet transmission radiation was significantly reduced to 7-10 % after applying ten composite layers. Valuable antibacterial textiles which are required in different medical purposes could be successfully produced, as excellent antibacterial activities were achieved by using the reported method. The developed process can be easily adapted to the existing textile machinery, making it industrially viable to produce fabric's versatility. [ABSTRACT FROM AUTHOR]