Ecofriendly ultrasonic natural dyeing of cotton fabric with enzyme pretreatments
Abstract
Ecofriendly ultrasonic textile dyeing with natural dyes such as Acacia catechu and Tectona grandis show better and faster dye uptake after enzyme pretreatment on cotton fabric, and results of dyeing are better than metal mordanted fabric. It is observed that there is marked improvement in wash-fastness and light-fastness. The role of enzyme pretreatment is primarily for better absorbency, adherence and dyeability of these dyes on cotton fabric, thereby completely replacing metal mordants with enzyme for adherence of natural dyes on cotton. Scanning electron microscopy show surface characteristics at different stages of dyeing. The effect of sonication on the dyeing is compared with conventional heating. The study also shows enhancement in CIELab values.
References (11)
- E. Tsatsaroni et al.
Dyes Pigments
(1995) - M. Liakopoulou-Kyriakides et al.
Dyes Pigments
(1998) - S. Vajnhandl et al.
Dyes Pigments
(2005) - A. Riva et al.
Melliand Textiberichte
(1991) - A. Riva et al.
Dyers Colourists
(1993)
Cited by (85)
Microbial enzymes for the variable applications of textile industry processing
2023, Valorization of Biomass to Bioproducts: Biochemicals and BiomaterialsEnzymes of microbial origin are well known for several centuries in the service of textile industry processing. In the past century, employment of enzymatic treatments has substantially increased, particularly for the processing of natural fibers in manufacturing stages. The major enzymes applicable in the textile industry include amylase, protease, lipase, pectinase, catalase, cellulase, and laccase. These industrially valuable enzymes are dominantly obtained from microorganisms such as fungi and bacteria. The major reason for their use is regarded with their eco-friendly nature, substrate specificity, focused performance, and replacement of harsh chemicals from the textile treatments. Therefore, to overcome the utilization of harmful chemicals, microbial enzymes have been extensively used in textile processing such as textile desizing, bleach liquor, scouring, denim finishing, treatment of wool, fabric bleaching, dye decolorization, and textile bleach. The present book chapter summarizes the findings of the researches related to the enzymatic treatment of textile fibers with the use of potentially valuable microbial enzymes. This chapter also includes the biotechnological and potential applications of enzymes in various aspects of the textile industry.
Textile colouration with natural colourants: A review
2022, Journal of Cleaner ProductionThis paper provides an in-depth review of the natural colourants covering their classifications, sources, extraction techniques, application techniques in relation to different textile fibres and their advantages and challenges. The academic readers will find here an overview of the latest developments in extraction and application techniques of a variety of natural colourants. Almost all commercially produced natural fibres and the major synthetic fibres are found to be dyeable and printable with natural colourants. Although the production of natural colourants offers a lot of environmental benefits, their application techniques in textile colouration are not always sound for environment due to the need of synthetic mordants in colouration process. Advances in modern agriculture and biotechnology can play a key role in sorting the limitations of natural colourants and at the same time more and more investigations are still required to establish their cleaner application on textiles.
Future trends and promising applications of industrial sonochemical processes
2022, Energy Aspects of Acoustic Cavitation and Sonochemistry: Fundamentals and EngineeringDuring cavitation, nucleation, growth, and subsequent collapse of microbubbles in a liquid medium result in the generation of high temperature and pressure locally at millions of locations within, and in the immediate vicinity of the collapsing cavity in the sonochemical reactor. These effects have been effectively utilized to promote and intensify various physicochemical transformations in numerous applications in chemical synthesis via reducing the reaction time, increasing the reaction yield, switching of the reaction pathways, and initiation of the chemical reactions due to the formation of reactive free radicals. This chapter highlights various applications and future trends of the cavitation phenomenon involving intensification of various unit operations and processes in water and wastewater, biotechnology, material science, food and beverage, petroleum, textile processing, and other allied industries. For each of the applications, improvement demonstrated by ultrasound and ultrasonic cavitation over the conventional method is presented. The typical challenges in each of these segments are also presented.
Dyeing of fibers and impact on the environment
2022, Green Sustainable Process for Chemical and Environmental Engineering and Science: Green Composites: Preparation, Properties and Allied ApplicationsConventional textile dyeing technologies are based on wet processes that use a vast amount of water and energy and generate massive amounts of wastewater during textile wet processing, such as dyeing, printing, and finishing. Since wastewater carries pollutants, such as dyes, salts, alkalis, surfactants, and finishing agents, it requires to be specially treated before discharging to diminish the amount of contaminants beforehand, which requires large capital expenditure and water treatment cost. It is essential to know that some of the toxic and harmful chemicals also cannot be completely treated and pose a huge health risk to human health. In this context, we describe the textile dyeing processes, dyeing of synthetic and natural fibers, the environmental impact, and recent advances in textile dyeing technologies and effluent treatments.
Non-food applications of natural dyes extracted from agro-food residues: A critical review
2021, Journal of Cleaner ProductionFruit and vegetables contain molecules that have particular colors, which can potentially be an environmentally attractive substitute for their synthetic counterparts in (non-)food applications. The most sustainable source for such natural colorants would be by the valorization of by-products from the fruit and vegetable industries, but qualitative and quantitative characteristics of food by-products for this purpose remain scarce. Natural dyes also show mediocre stability and affinity toward textile fibers, which questions their potential feasibility for application and level of sustainability to overcome these issues. This review describes three dye classes (i.e., anthocyanins, quinones, and carotenoids) along with their occurrence, mass, and concentration in by-products that are generated from agricultural losses as well as the fruit and vegetable processing industries. To tackle the shortcomings of natural dyes on fibers, several application techniques were collected from the literature. A discussion on techno-economic potential and environmental sustainability is included. The latter is done by including a life cycle assessment (LCA) to investigate the environmental impact of extracting anthocyanins, quinones, and carotenoids from fruit and vegetable processing by-products and their subsequent application to the dyeing process. The mapping of by-products for each natural dye class illustrates the vast availability of agro-food residues (>0.1 Mt annually in the EU-28) with a natural dye content of up to 56 kg/t DW for anthocyanins, 18 kg/t DW for quinones, and 593 kg/t DW for carotenoids. Metallic mordants are mostly favored for improving the fixation of natural dyes but entail potential environmental issues. Greener approaches, such as biomordants and enzymes, still show room for improvement, chemical modification methods might also guarantee dye fixation, though questionable in environmental sustainability. The different valorization scenarios of anthocyanins, quinones, and carotenoids from food waste, analyzed with LCA, showed the environmental competitiveness of these natural dyes, applied as a crude extract, compared to synthetic dyes. The valorization routes design shows that agricultural losses and food processing waste streams are adequate sources of natural dyes, especially to be applied in niche scale applications.
Potential applications of sustainable chemistry in processing of manmade and protein fibers
2021, Green Chemistry for Sustainable Textiles: Modern Design and ApproachesThis work is aimed to focus on the recent applications for the modification of proteinic and manmade fibers as well as their blends using physical methods such as plasma technology, laser irradiation, sonication, microwave, and thermal treatments. Chemical treatments such as ozone gas treatment, supercritical carbon dioxide technique, vapor deposition, and nanoparticles deposition are also tried. Different biotechnology treatments with eco-friendly reagents including enzymes, medical plants, and chitosan are given. An overview on the applications of these various physical, chemical, and biological methods to enhance dyeability, antibacterial properties, flame retardancy, self-cleaning, and ultraviolet protection is investigated. The targeted manmade fibers include polypropylene, polyethylene terephthalate, polyamide, and polyacrylonitrile, as well as cellulose acetate. This chapter also investigates the applications of the aforementioned techniques on wool, silk, and their blends to improve their functional characteristics such as shrinkage resistance, felt proofing, water and oil repellency, soil resistance, antipilling, anti-insects, and anti-odor properties.