PurposeThe growing environmental concerns and adverse effects of synthetic dyes have led to increasing interest in the use of nontoxic, eco-friendly natural dyes for textile coloration. This study aims to investigate the dyeing potential of a natural dye extracted from Mimusops elengi fruit, with the aim of providing a sustainable alternative for cotton fabrics.Design/methodology/approachAqueous and alkaline extracts were prepared and applied to cotton fabrics both with and without mordants. The dyed samples were evaluated in terms of color strength (K/S), CIE L *a*b* values, wash and rubbing fastness and bonding interactions between the dye and cellulose fibers.FindingsThe highest K/S value (2.265) was obtained using pomegranate peel as the biomordant. Wash fastness was evaluated using the grey scale, ranging from 4 (very good) to 4-5 (excellent), with fabrics dyed at pH 4 and treated with pomegranate peel showing superior results. The dyed fabrics exhibited bright colors with excellent wash and rubbing fastness, showcasing strong resistance to fading. Fourier transform infrared analysis revealed polyphenolic compounds such as flavonoids and tannins, which play a crucial role in dye-fabric bonding through hydrogen bonds and van der Waals interactions, improving color retention and durability.Originality/valueBased on the findings, it can be concluded that the dye extracted from Mimusops elengi can be effectively used without the need for chemical mordants. This report highlights the use of Mimusops elengi fruit as a novel source of natural dye for textiles, providing a foundation for further investigations into its applications across various textile materials and dyeing conditions.

Increasing environmental awareness has led to a growing global demand for plant-based dyes, which are safer and more eco-friendly alternatives to traditional synthetic dyes, often containing hazardous chemicals. This study aimed to explore the potential of natural dye from wax apple (Syzygium samarangense) leaves for dyeing cotton and silk fabrics. An aqueous extract was prepared and applied without the use of any mordant, at dye concentrations of 1%, 3%, 5%, 7%, and 9%. The color strength of the dyed fabrics increased with dye concentration, reaching a maximum K/S value of 1.863 at 9% for cotton, while silk achieved saturation at 7% with a K/S value of 4.463. Washing fastness, assessed using the gray scale, ranged from Fair (Rating 3) to Good (Rating 4) for cotton, whereas silk exhibited Very Good (Rating 4-5) to Excellent (Rating 5) performance. In perspiration, rubbing, and light tests, all samples showed very good to excellent results. Additionally, tensile strength tests indicated no significant impact on the structural integrity of cotton and silk fabrics after dyeing. Overall, the dye offers a sustainable and eco-friendly alternative, as it is nontoxic and abundant, and provides a renewable source of colorant for dyeing both cotton and silk textiles.

In response to the heightened awareness of infectious diseases and the growing emphasis on personal protection in daily life, the utilization of natural bioresources for textile fabric dyeing has garnered substantial research attention. This is particularly due to their ability to confer antibacterial and UV protection properties to fabrics. In this study, the dyeing properties of Mimusops elengi Linn extract, alone and mordanted, were evaluated on blended wool/acrylic and silk fabrics, along with an assessment of their antibacterial and UV protection characteristics. The dyed fabrics exhibited good color strength and color fastness. Quantitative assessment of antibacterial activity was conducted using the reduction percentage test, while UV protection properties were determined through the measurement of Ultraviolet Protection Factor (UPF). Aqueous extract alone, when applied to blended wool/acrylic fabric, demonstrated an impressive 99.88 % reduction against Staphylococcus aureus, and 48.33 % for silk fabric, albeit less effective against Escherichia coli. Notably, when fabrics were dyed with a combination of leaves extract and various metal salt mordants, a substantial improvement in antibacterial properties was observed. Zinc and copper salts, in particular, exhibited the ability to enhance antibacterial properties to almost 100 % against Staphylococcus aureus and Escherichia coli in both blended wool/acrylic and silk fabrics. Concurrently, this combination contributed to an increase in the UV protection property of both fabrics. The findings underscore the potential of plant-based natural dye for blended wool/acrylic and silk fabrics, imparting antimicrobial and UV protection properties. This has significant implications in preventing the spread of infections and skin diseases, emphasizing the vital role of such textiles in promoting health and well-being.

Purpose In recent years, natural dyes have attracted significant attention globally because of growing public awareness of the environment and health hazards associated with synthetic dyes. Natural dyes can provide special aesthetic qualities as well as the ethical significance of a product which is environmentally friendly. By keeping this burning issue in mind, this study aims to explore the dyeing properties of various unexplored environmentally friendly natural dyes. Design/methodology/approach In this study, the aqueous extract of coconut leaves is used for dyeing purpose. The silk and jute fabrics were dyed with the extract alone as well as in combination with metal salts as mordants by employing pre-, meta- and postmordanting techniques. The dyeing properties of the colored samples were evaluated by measuring their color strength; CIE L * a * b * values; and color fastness to washing, light and rubbing. Findings A yellow shade was achieved when the fabric samples were dyed solely with the extract. However, shade variations were observed when different mordants and mordanting techniques were applied. In all the cases, metallic salts improved the color fastness properties of dyed samples to washing, light and rubbing especially for the silk fabric. Originality/value To the best of the authors’ knowledge, this is the first report on a natural dye extracted from the leaves of coconut. Leaf as the source of dye has added an extra advantage, as it is reproducible and can be collected easily without harming the plants. The reported dye could be an attractive choice for sustainable and eco-friendly dyeing.

Jute is a ligno-cellulosic natural fiber that ranks second in terms of the volume of cellulosic fibers and is extensively utilized for technical textile applications. The goal of this study is to determine the flame-retardance (FR) properties of pure Jute and Jute-Cotton fabrics treated with Pyrovatex CP New at concentrations of 90% (owf), M:L: 1:7. Both fabrics exhibited a substantial improvement in flame-retardancy. After the ignition period, the recorded flame spread time in both FR treated fabrics was zero seconds; whereas for untreated Jute and Jute-Cotton fabrics, the flame spread time was measured 21 s and 28 s, respectively, to burn their entire length (15 cm). Within these flame-spread times, the length of the char was 2.1 cm and 2.57 cm in the Jute and Jute-Cotton fabrics, respectively. After FR finishing, on both fabrics in the warp and weft directions, the physico-mechanical properties significantly decreased. The deposition of flame-retardant finishes on the fabric surface was determined by Scanning Electron Microscope (SEM) images. According to Fourier Transform Infra-Red Spectroscopy (FTIR) analysis, the flame-retardant chemical had no effect on the inherent properties of the fibers. Thermogravimetric analysis (TGA) analysis revealed that FR treated fabrics had early degradation, resulting in the formation of more char than in the untreated samples. After FR treatment, both fabrics showed a significant improvement in residual mass (more than 50%). Although the formaldehyde content observed in the FR treated samples was significantly greater, it was still within the permitted limit formaldehyde content in textiles intended for outerwear and not worn next to the skin. The results of this investigation demonstrate the potential use of Pyrovatex CP New in jute-based materials.

Abstract The ligno-cellulosic Jute fiber, which holds the second largest volume among the natural cellulosic fibers after Cotton. This study focuses on the determination of the flame-retardance (FR) properties of pure Jute and Jute-Cotton fabrics treated with Pyrovatex CP New at concentrations of 90% (owf), M:L: 1:7. A significant improvement in flame-retardancy was determined on both fabrics. After the ignition period, the recorded flame spread time was zero second on both FR treated fabrics; on the other hand, it was measured 21 seconds and 28 seconds to burn the entire length (15cm) of untreated Jute and Jute-Cotton fabrics, respectively. Within these flame-spread times, the length of the char was 2.1 cm and 2.57 cm in the Jute and Jute-Cotton fabrics, respectively. The physio-mechanical properties dropped remarkably after the FR finish in both the warp and weft directions of both fabrics. The SEM images determined the deposition of flame-retardant finishes on the fabric surface. FTIR characterization showed that the inherent properties of the fibers were not affected by the flame-retardant chemical. The TGA analysis showed that the early decomposition occurred on both FR treated fabrics and hence formed more char than the untreated samples. A significant improvement in residual mass (more than 40%) was observed in both fabrics after FR treatment. The detected formaldehyde content on the FR treated samples was much higher; however, it was still in the limit of the allowed formaldehyde content present in textiles that are designed for outerwear and not worn next to the skin. The findings reported in this study show the potential application of Pyrovatex CP New to jute-based materials.

There has been recently a worldwide interest in the production and application of natural dyes due to the growing awareness about cleaner surroundings and healthy lifestyle. The new sources of natural dyes increase the scope of textile dying with eco-friendly dyes and able to alleviate the adverse effects in this sector. Reported here is a new natural dye that was extracted from the leaves of date palm using simple aqueous extraction process. The natural dye extract obtained from date leaves was used in dyeing of cotton and silk fabrics with different mordants by applying different mordanting techniques and the properties of the dyed fabrics were evaluated by their color strengths and fastness properties. A reddish shade was observed when used the dye extract only; however, a variety of shades were achieved when different mordants and mordanting technique were used. In most of the cases, impressive color strengths and fastness properties were observed for dyed fabrics. These results are very attractive from a practical point of view for eco-friendly dying.

In this study, the dyeing properties of a natural dye, extracted from the leaves of mimusops elengi Linn, on cotton and silk fabric were examined. Leaves are always an attractive choice as a raw material for natural dyes since they are readily available and reproducible compare to other parts of the plant without damaging the trees. The dye component in leaves of mimusops elengi is easily extractable by aqueous extraction process and the amount of achievable crude dye is exceptionally good. The dye extracts itself as well as mixing with various mordant including a natural one were applied to the fabrics by using pre-, simultaneous- and post-mordanting techniques. Impressive results were found for the color strength and fastness properties of dyed fabrics. Various shades and excellent color fastness of dyed samples were observed. Therefore, the eco-friendly natural dye extracted from the leaves of mimusops elengi can be an attractive choice for dying the cotton and silk fabrics with various elegant shades.