Extraction Of Natural Dye Research Articles

Study of Dyeing With Natural Extract of Butterfly Pea Flowers (Clitoria Ternatea) on Cotton Fabrics

Objective: This study aims to optimize the dye extraction and dyeing variables in cotton fabrics using dried Butterfly Pea flowers (Clitoria ternatea), in order to evaluate its potential as a natural dye in the dyeing of cotton fabrics. Theoretical Framework: This research is presented based on fundamentals related to dyeing with natural dyes, dye extraction and pre-mordanting procedures, as well as studies related to the dyeing of cotton fabrics. Method: This research was carried out by varying the dye extraction temperature and dyeing parameters, which were documented and optimized. The pre-mordanting process was also used with 5 different biomordants, at the end the washing and friction fastness properties of the fabrics dyed with and without the pre-mordanting process were observed. Results and Discussion: The results showed that the best dye removal temperature was 70°C and the optimized dyeing conditions were a temperature of 50°C, time of 60 minutes and pH 3. In general, the use of biommordants did not promote improvements in solidity interactions. Research Implications: The use of natural dye made from Butterfly Pea flowers in dyeing provides a blue color to the cotton fabric, which is difficult to achieve. Originality/Value: The use of natural dye made from Butterfly Pea flowers in dyeing provides a blue color to the cotton fabric, which is difficult to achieve.

Extract of Papaver Rhoeas for Daylight Imaging of Latent Fingerprints

AbstractThe extraction of natural red dye (PR) from the flower Papaver rhoeas (common poppy) and its adsorption on montmorillonite clay (PR@MM) was reported. The powder PR@MM was used for the development and visualization of LFPs taken on common household, nonporous, and colored surfaces in daylight using powder dusting method without any pre‐ or posttreatment and equipment. The information of level 1 (ridge classification) and level 2 (minutiae details) from the fingerprint can be obtained using PR@MM powder.

Research of coloristic properties of textile materials dyed with natural dyestuff

The development of an environmentally friendly technology for dyeing textile materials for various purposes implies the modification of technological processes by using less harmful consumables, namely, dyes of plant origin. Dyes of plant origin have biological decomposability and the most friendly to human nature, and many of them also have a complex of antibacterial and medicinal properties. The purpose of this work is to study the colorimetric properties and develop mathematical models of the obtained dyes based on natural herbs. Extracts of dyes for dyeing textile materials are obtained from the peel of onions, walnut shell, tansy and hypericum with the addition of the following modifying components: aluminum-potassium alum or copper sulfate. The study of the coloristic properties of the obtained dyes was carried out using the Konica Minolta CM-3600d device in the color coordinates 360-700 nm. The results of the study showed the high efficiency of the use of modifying additives in the composition of dyes on the quality of coloring of textile materials. Based on the results of coloristic studies, regression equations and mathematical models describing the effects of staining depth and color reflection on the intensity of tissue coloring are constructed. Due to the active extraction of natural dyes and expanded color shades, the introduction of natural dyes into the textile industry is an urgent task. The introduction of developed natural dyes with modifying additives will improve the hygienic properties of products and increase the environmental friendliness of the finishing process.

Extraction of natural dye from Broccoli (Brassica oleracea) and evaluation of its antimicrobial, ultraviolet and dyeing properties on cotton fabrics

Extraction of natural dye from Broccoli (Brassica oleracea) and evaluation of its antimicrobial, ultraviolet and dyeing properties on cotton fabrics

Spectroscopic study of wemple-didomenico empirical formula and taucs model to determine the optical band gap of dye-doped polymer based on chitosan: Common poppy dye as a novel approach to reduce the optical band gap of biopolymer

This study investigates the effect of a natural dye extracted from common poppy (Papaver rhoeas) waste flowers on the optical properties of chitosan (CS) films. The extraction of natural dyes from waste flowers can be considered a new field for research in green chemistry. CS films are flexible and biodegradable but have low optical activity and band gap, limiting their applications in optical devices. The doped CS polymer with different concentrations of Papaver rhoeas dye exhibited enhanced optical properties. Also, 30 % glycerol was added as a plasticizer to omit film brittleness. The FTIR examinations is helpful to propose a mechanism that explains the interaction of the dye with the host polymer. The UV–vis spectroscopic examination establish that the optical characteristics of the films can be modified by adjusting the dye concentration. Furthermore, optical absorption properties are described using the Tauc non-direct transition model, revealing an approximate optical band gap of 1.64 eV. This band gap defines the energy required for electron transitions, elucidating the material’s electronic characteristics. The extinction coefficient (k) and refractive index (n) of the CS-doped films’ shows a dispersion behavior at visible regions of EM radiation. The Wemple-DiDomenico single oscillator model was used to investigate the n dispersion and determine the oscillator energy equivalent to the optical band gap. Additionally, calculations have been performed on optical dielectric properties and optical conductivity. The Urbach energy was measured and used to detect the structure of the films. The findings underscore the potential applications of these natural dye-doped CS films in eco-friendly materials and optical devices.

Evaluating Supercritical Carbon Dioxide Extraction vs. Conventional Aqueous Extraction of Natural Dyes from Hypericum triquetrifolium for Textile Fibers Dyeing

Evaluating Supercritical Carbon Dioxide Extraction vs. Conventional Aqueous Extraction of Natural Dyes from Hypericum triquetrifolium for Textile Fibers Dyeing

Using natural antioxidant Rhubarb extracts in PVA/chitosan bio-adsorbent films for efficient removal of cationic and anionic dyes from polluted water

In this research, sustainable membrane films were developed for removal of cationic and anionic dyes from wastewater based on polyvinyl alcohol/chitosan (PVA/CS) incorporated with natural antioxidant Rhubarb dye (Rh) extracts. Rh dye was extracted from Rhubarb roots by a green method. Three different quantities of Rh dye extracts (i.e., 2.5, 5, and 10 %) were used to fabricate crosslinked PVA/CS films by solvent-casting approach. The fabricated films subjected to different techniques such as X-ray diffraction (XRD), scanning electron microscopy combined with energy dispersive X-ray spectroscopy (SEM-EDX), dynamic mechanical analysis (DMA), as well as antioxidant activity. In all cases, the incorporation of Rh dye extracts inside the composite improved the crystallinity, biocompatibility, stress–strain properties, besides the DPPH scavenging activity reached 42.50 % for PVA/CS-10 % Rh membrane compared to PVA/CS blank (i.e., ∼ 2.10 %). Dyes adsorption including different cationic and anionic dyes implemented for all selected membranes. The data revealed that the membrane containing 10 % Rh dye was the optimum for removal of malachite green oxide (MG, 93 %) as cationic dye and methyl orange (MO, 95.70 %) as anionic dye. Moreover, the kinetics of the removal process exhibited that this process followed the Langmuir, Freundlich, Temkin, Dubinin-Radushkevich models, and the pseudo-1st order kinetic model, with an R2 of 0.998 and 0.943 for MG and MG, respectively. Whereas, the adsorption process corresponded to the Freundlich isotherm model, with coefficients R2 was of 0.989 and 0.988 for MO and MG, respectively. Other parameters including dye concentration, contacting time, pH media, and kinetic studies were also applied on PVA/CS-10 % Rh membrane.

Chemical modification of marigold (Tagetes erecta) dye via diazo-coupling reaction for enhanced dyeing on polyester: A sustainable approach

Plant-derived natural extracts contain large amounts of polyphenolic compounds, presenting opportunities for chemical modification. The present study deals with the extraction of dye from Marigold (Tagetes erecta), a widely cultivated and commercially utilised flower, using water as an extraction medium followed by its chemical modification for sustainable synthesis of yellow dye and dyeing of polyester fabric. Phytochemical analysis and FTIR spectroscopy of the natural dye extract from Marigold flowers indicated the presence of polyphenolic flavonoids. The water-extracted natural dye was subsequently chemically modified with aniline, a primary aryl amine, via diazotisation and coupling reactions to yield a semi-synthetic natural dye with a 1.2 ± 0.3 g yield. The major constituents in the marigold natural extract and the Modified Marigold Extract (MME) dye were characterised using High-Resolution Liquid Chromatography-Mass Spectrometry (LC-HRMS). The marigold water extract contained a high concentration of Gossypetin 8-Glucoside, a yellow-coloured flavonoid compound with a mass-to-charge ratio (m/z) of 480.0904. LC-HRMS analysis further confirmed the presence of a constituent (m/z 424.0485) in the MME dye, corresponding to the predicted mass of chemically modified Gossypetin 8-Glucoside. The MME dye was subsequently employed for dyeing polyester fabric, exhibiting maximum colour strength at 10 % shade under acidic condition. The dyeing performances of the MME-dyed fabrics were evaluated in terms of fastness and post-dyeing strength. This study demonstrates a unique and novel approach to develop a yellow semi-synthetic natural dye, emphasising its potential utility for polyester dyeing.

Review on Classification, Extraction and Application of Natural Dyes

India has over 450 plants capable of producing dyes. Dyes from natural sources such as plant leaves, roots, bark, insectsecretions and minerals. Natural dyes are mainly used for dyeing natural fibers such as cotton, wool and silk. Most natural colors have special properties such as antibacterial, low toxicity, allergenicity and UV protection. They have been used since ancient times and are widely accepted in various fields such as food, textiles, fine arts and papermaking. There are currently many different dye extraction methods/processes, including Solvent extraction, aqueous extraction, enzymatic extraction, etc. All these extraction methods have their advantages and disadvantages. Experimental results show that it performs well with all natural dyes and may be a better alternative to synthetic dyes. In recent years, it has been observed that synthetic dyes have many drawbacks, such as toxicity, pollution, and allergenicity, but natural dyes do not have such drawbacks. This article discusses the types of natural dye sources and their extraction methods, classification, environmental benefits, and other uses.

Natural dyes in textile printing: parameters, methods, and performance.

In recent years, consumer preferences have begun to turn back to natural dyes, whereas synthetic dyes have been pushed into the background over the previous 60years. This is a result of increased knowledge of the potential hazards associated with the creation of synthetic dyes, which use raw materials derived from petrochemicals and involve intense chemical interactions. Such dyes need a lot of energy to produce, and their negative effects on the environment increase pollution. It has been discovered that several of these dyes, particularly the azo-based ones are carcinogenic. On the contrary, natural dyes are getting more attention from scientists and researchers as a result of their several advantages like being eco-friendly, biodegradable and renewable, sustainable, available in nature, having no disposal problems, minimizing the consumption of fossil fuel, anti-bacterial, insect repellent, and anti-allergic, anti-ultraviolet, intensify dyeing and finishing process efficiency, less expensive, and no adverse effects on human health and environment. However, there are also some drawbacks, like poor fastness properties, natural dye printing for bulk production, difficulties in reproducibility of shades, and so forth. Despite all these limitations, the demand for natural dyes is increasing significantly in textile industries because they offer far more safety than synthetic dyes. This study provides an overall concept of the natural dyes in textile printing. It illustrates parameters of printing performance, methods, and techniques of extraction of natural dyes, printing methods, and printing of natural and synthetic fibers. Finally, this study describes the challenges and future prospects of natural dyes in textile printing.

Extraction and application of eco-friendly ratio natural Dye from Jamun on different fibers by using ratio Combination of Mordents

Extraction and application of eco-friendly ratio natural Dye from Jamun on different fibers by using ratio Combination of Mordents

Exploration of Cajanus Cajan Husk for Natural Dye Extraction: Its Characterization and Application on Cotton Fabric

Exploration of Cajanus Cajan Husk for Natural Dye Extraction: Its Characterization and Application on Cotton Fabric

Studi Pustaka: Ekstraksi Pewarna Alami dari Tanaman di Indonesia

Dyes have played an important role in human life, therefore the production of dyes has continued to increase from the past until now. The use of synthetic chemical dyes has apparently caused various health and environmental problems, this is what has triggered the return to use of natural dyes. Through advances in science and technology, research related to the extraction of natural dyes in Indonesia was carried out until 31 scientific reports were found that studied this matter in the last ten years. Literature studies with secondary data have summarized the novelty of research related to the extraction of natural dyes from plants, where currently flower objects are of great interest for observational studies. Various types of flowers have potential pigments that can be converted into natural dyes. The maceration extraction method is still the choice for extracting plant bioactive substances. Recently a study on the extraction of dyes from fruit peel waste was also carried out. It is hoped that the development of information related to the extraction of natural dyes will have more opportunities to be applied in various aspects.

Encapsulation Characteristic of Bougainvillea (Bougainvillea glabra) Dye Extract in Comparison of Maltodextrin and Carrageenan

Bougainvillea flower is recognized as food coloring agent due to the presence of betacyanin compounds. The extraction of these compounds is followed by a subsequent process for encapsulation. Therefore, this research aimed to determine the effect of maltodextrin and carrageenan on encapsulation characteristics of bougainvillea flower dye extract and obtain the best ratio. Encapsulation was carried out with the ratio of maltodextrin and carrageenan, namely 10:0 (MC1), 9.5:0.5 (MC2), 9:1 (MC3), 8.5:1.5 (MC4), 8:2 (MC5) and 7.5:2.5 (MC6). The results showed that maltodextrin and carrageenan ratio significantly affected the amendment, moisture content, solubility, brightness level (L*), redness level (a*), yellowness level (b*), total betacyanin, surface betacyanin and encapsulation efficiency. Based on the test, the effectiveness index to produce the best treatment was MC3 with characteristics of amendment, moisture content, solubility, brightness level (L*), redness level (a*), yellowness level (b*), total betacyanin, surface betacyanin and encapsulation efficiency at 91.61 ± 0.34, 6.53 ± 0.22, 87.35 ± 1.90 %, 80.43 ± 1.37, 20.37 ± 0.49, 20.73 ± 0.40, 246.99 ± 2.70, 35.76 ± 0.46 mg/100 g and 85.52 ± 0.09 %, respectively. The encapsulated formulation of bougainvillea flower extract with maltodextrin and carrageenan in a balanced ratio can be used as an alternative to provide natural coloring in food processing. HIGHLIGHTS Bougainvillea flowers can be extracted to produce an extract containing betacyanin Bougainvillea extract is liquid and is easily damaged by oxidation Application of encapsulation in bougainvillea extract can protect betacyanin from damage due to oxidation and hydrolysis, evaporation or heat degradation The novelty in this research is the optimal treatment for producing encapsulated natural bougainvillea flower dye extract is a ratio of maltodextrin and carrageenan of 9:1. The formulation of bougainvillea flower extract with maltodextrin and carrageenan in an appropriate ratio can be used as a potential natural coloring alternative in functional food processing. GRAPHICAL ABSTRACT

Optimization of natural dye extraction from the root of Rumex abyssinicus plant using response surface methodology

In this study, Rumex abyssinicus (R. abyssinicus) roots were used for dye extraction via Soxhlet extraction. The effects of particle size, solid-to-liquid ratio and extraction time on dye yield were examined. The optimization of dye extraction wascarried out using response surface methodology coupled with the Box–Behnken approach. A maximum dye yield of 53 % was attained at an optimumparticle size of 0.355 mm, a solid-to-liquid ratio of 0.075 g/mL and an extraction time of 5 h. Functional group analysis using FTIR and a UV–vis spectrophotometer was performed to determine the characteristics of the extracted dye. The FTIR analysis results showed the presence of various functional groups in the extracted dye. Additionally, UV–vis spectrophotometer confirmed that the maximum absorbance peakwas detected at 281 nm, with an absorbance of 0.908. Overall, the results show that R. abyssinicus root is a potential source ofdye that has applications in various industries.

Effect of Natural Dye Extracts on the Absorbance Characteristics of TiO2 in Dye-Sensitized Solar Cells

Natural dye extracts from Chinese Ixora (Ixora chinensis) flower, Cassod flower (Cassia Siamea), Cassava leaf (Manihot Esculenta), purple heart (Tradescantia Pallida) and Copper leaf (Acalypha Wilkesiana) have been explored as sensitizers for the fabrication of dye-sensitized solar cells. The properties of the dyes were investigated using the FTIR and they all showed broad absorption bands in the 3800 to 3000cm-1 wavelenght and strong presence of intermolecular H-bonds. The effect of dye extracts on the absorbance and transmittance features of TiO2 was well studied by the UV-VIS and the absorbance peak was in the case of sensitization with Manihot Esculenta seen to radically improve above 1.0 at 350nm wavelength. Finally, the current and voltage characteristics of the DSSC were studied in sunlight and at a peak sunlight intensity of 601m/w2, the Manihot and Cassod sensitized devices exhibited maximum voltage values of 115 and 84mV respectively and maximum current values of 4.32 and 2.99mA. These plants have shown great potential for application in fabrication of cost effective and environmentally friendly DSSCs.

Colour gamut analysis of low‐cost dye‐sensitised solar cells using natural dyes

AbstractDue to the increasing effects of greenhouse gases and environmental pollution, the need for new clean energies like solar energy attracts much attention. Although the characteristics and the efficiency of green photovoltaic devices have been researched, the colour gamut achievable from those devices has not been studied. This study investigates the colour gamut of low‐cost dye‐sensitised solar cells (DSSCs). To do this, 14 natural dye extracts were obtained from herbal resources including dragon fruit, blueberry, mango, radish, yellow rose, red cabbage, sour pomegranate, beetroot, olive, green cabbage pepper, eggplant, parsley, bramble and cherry, and employed as photosensitiser in solar cells. Then, the colorimetric attributes of the photosensitisers were studied in three‐dimensional (3D)‐colour space, that is, CIELab, CIELCH and CIE1931 chromaticity diagram. Additionally, the convex hull method was employed to determine the colour gamut boundary and the corresponding colour gamut volume. Results showed that the majority of samples benefited from approximately 3°–82° of hue angle in a*b* diagram of CIELab colour space and showed the yellowish to reddish tint effects. In CIELCH colour order system, cherry and parsley showed the lowest and highest lightness attributes while the chroma property of samples varied from minimum 1.2 for eggplant to maximum 60.2 for the dragon fruit. Moreover, the results of using the convex hull method showed the volume of 7.73 × 104 that is bounded by the colour gamut of 3D colour points over the CIELab colour space.

Assessing the dyeing efficacy and environmental impact of cotton fabric dyed with sawmill bio‐waste extracts and metal salts

AbstractTextile coloration is a complex process involving the interaction of dye molecules with fibers in a dye bath. Synthetic dyes pose environmental hazards, leading to increased interest in natural dyes sourced from plants, animals, and minerals. However, natural dyes often require mordants for application to textiles. Despite their eco‐friendliness, natural dyes can exhibit poor wash fastness on fabrics, necessitating further research to enhance their performance. This study investigates the use of mahogany sawdust extract as a natural dye for cotton coloration, focusing on the enhancement of fastness properties through metallic mordants and associated environmental risks. Mahogany sawdust, rich in flavonoids and tannins, shows promise as a sustainable alternative to synthetic dyes. The dyeing process involves the extraction of natural dyes from sawmill bio‐waste and subsequent application onto cotton fabrics using various metallic mordants. Evaluation of colorfastness properties, color strength, color coordinates, tensile strength, FTIR, and SEM analysis provides insights into the dye‐fiber interactions and fabric properties. Environmental risk assessment considers metal exhaustion onto fabric surfaces, residual metal concentrations in mordant baths, and metal content in dyeing wastewater. Overall, this study contributes to the development of sustainable dyeing processes and highlights the importance of environmental considerations in textile coloration.Highlights Mahogany sawdust extract: potential natural dye for sustainable cotton coloration. Metallic mordants enhance colorfastness and fabric durability in dyeing processes. Comprehensive analysis reveals the intricate dynamics of dye‐fiber interactions. Environmental risk evaluation guides sustainable textile manufacturing practices. Research paves the way for greener, more sustainable textile industry practices globally.

Enhancing the dyeing efficiency and color fastness properties of wool fabric coffee natural dye extract

Enhancing the dyeing efficiency and color fastness properties of wool fabric coffee natural dye extract

Investigating the influence of natural dye extracts from Ocimum gratissimum, Solanum melongena, Piper guineese, and their blend in the fabrication of perovskite solar cells

Perovskite solar cells (PSCs) represent a promising alternative to conventional silicon solar cells but face challenges like instability stemming from structural defects, environmental toxicity due to the selection of precursors and additives, and concerns regarding long-term reliability. To address these issues, we investigated the viability of cost-effective and eco-friendly PSCs by strategically incorporating natural dyes derived from indigenous plants, including Ocimum gratisimum, Solanum melongena, and Piper guineese, into the MAPbI3 perovskite crystal, using a two-step sequential drop-casting technique. The resulting perovskite films underwent comprehensive analysis for their structural, morphological, optical and elemental composition using an X-ray diffractometer (XRD), scanning electron microscopy (SEM), UV–visible spectrophotometer (UV–Vis) and energy dispersive X-ray microscopy (EDX). Performance evaluation was conducted through J-V curve analysis using a solar simulator. The XRD analysis revealed polycrystalline films with enhanced diffraction intensities corresponding to a hexagonal structure, and the UV–Vis analysis demonstrated substantial improvements in light absorption with improved optical properties. SEM studies provided crucial correlations between morphology and performance, with each sample exhibiting unique attributes, and EDX analysis confirmed essential elements within the films. The current density-voltage analysis demonstrated a 1.83 % power conversion efficiency (PCE) for the natural dye-doped device under air, surpassing the pristine device. This study advances the understanding of the synergies between natural dyes and perovskite materials, emphasizing their potential to enhance PSC efficiency. The findings underscore the considerations for designing and optimizing PSCs, paving the way for further exploration of natural dye-based approaches in sustainable photovoltaic technologies.