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Introduction to Textile Printing
Published in Asim Kumar Roy Choudhury, Principles of Textile Printing, 2023
From ancient times, people were fascinated by color and used to dye textile materials with coloring matters available in nature. Natural dyes can be sorted into three categories: Natural dyes obtained from plants (e.g., indigo),Those obtained from animals (e.g., cochineal) andThose obtained from minerals (e.g., ochre). Although some fabrics such as silk and wool can be colored simply by being dipped in the dye, others such as cotton require a mordant. Natural dyes can therefore be classified into two categories: Substantive andAdjective. Substantive dyes become chemically fixed to the fiber without the aid of any other chemicals or mordant, namely indigo or certain lichens. Adjective dyes, or mordant dyes, require some sort of substance (usually a metal salt) to prevent fading of color during washing.
Soga Tingi (Ceriops Tagal) as an alternative eco-friendly textile color
Published in Ratri Wulandari, Idhar Resmadi, Vika Haristianti, Rahmiati Aulia, Riky Taufik Afif, Gema Ari Prahara, Aulia Ibrahim Yeru, Dynamics of Industrial Revolution 4.0: Digital Technology Transformation and Cultural Evolution, 2021
A. Hendrawan, S. Mohamad, W. Listianingrum
Natural dyes are alternative textile dyes that are non-toxic, can be renewable, are easily degraded, and environmentally friendly (Pujilestari 2015). Using natural materials as textile dyes could preserve natural resources, improve the community's economy, and add cultural value to its products. Natural dyes have great potential to be developed.
New sustainable processes in the textile industry: Extraction of natural dyes
Published in Gianni Montagna, Cristina Carvalho, Textiles, Identity and Innovation: In Touch, 2020
P.M.S. Silva, T.R. Fiaschitello, R.S. Queiroz, S.A. Costa, S.M. Costa
Natural dyes are generally non-toxic, non-carcinogenic and biodegradable (Mirjalili, Nazarpoor & Karimi, 2011). The most used natural dyes are those of plant origin, obtained from various parts of plants, such as seeds, leaves, flowers, roots, bark, woods and fruits. The main sources of dyes are raw materials from the natural environment and agriculture and residues from agriculture, forestry and industry (Mussak & Bechtold, 2009; Rossi et al., 2017; Shahid, Shahid-Ul-Islam & Mohammad, 2013).
Natural Basil as Photosensitizer with ZnO Thin Films for Solar Cell Applications
Published in IETE Journal of Research, 2022
Tulshi Shiyani, S. K. Mahapatra, Indrani Banerjee
The dye can be classified into two main categories: natural and synthetic. Ruthenium (Ru)-based synthetic dyes have been used by most of the researchers. Ruthenium is a heavy metal and rare earth element. Hence, they are very costly and have not environment-friendly nature [14]. The synthetic dye can be replaced by natural dyes. Natural dyes can be simply extracted from plants, seeds, flowers, fruits, leaves, and vegetables. Natural dyes have received important attention in research because of abundant and non-toxic materials, low cost, and eco-friendly behavior [15]. Natural dye plays an important role to increase light absorption in hybrid solar cells. For effective performance, the highest occupied molecular orbit and lowest unoccupied molecular orbit (HOMO and LUMO) of the dye exist in the band gap and the conduction band of the semiconductor, respectively [16,17].
Sustainable plant-based bioactive materials for functional printed textiles
Published in The Journal of The Textile Institute, 2021
Alka Madhukar Thakker, Danmei Sun
To circumvent the top global environment crisis efficiently, we ought to comply and copiously support the declared climate emergency (Fleming, 2019). Concurrently, earnestly cohort binoculars on the existing dermatological, respiratory, and ecological ill effects of fossil-based textiles (Tang et al., 2018), for example, 75% of synthetic PET microfibers detected in the fish gut (Mowbray, 2019-2020), titanium dioxide, and aniline indigo scrutinized as carcinogens and so forth (Glover, 2019). Thus, there is paradigm shift worldwide to focus on alternative materials and methods to achieve the standards set by US Environmental protection agency (EPA) and ‘Registration, Evaluation, Authorization & Restriction Of Chemicals’ (REACH; Maida, 2019) and ‘Sustainable Development Goals’ (SDG) set by UN in 2015 for future ethics and responsibility toward environment and humans (United Nations, 2016). These government agencies promulgate the use of eco-friendly natural dyes in the textile dyeing and printing sector. The textile dye industry is the second chief polluter of the biosphere, after big oil. The research and development in the textile dye industry are thus concentrated in renewing natural dye interests for a sustainable future. Likewise, it is anticipated that the global market share of natural dyes will increase the revenue generation by $5 + billion by 2024. The compound annual growth rate would be 11% from 2018 to 2025 (Maida, 2019).
Adsorption equilibrium, kinetics and thermodynamics studies of anionic methyl orange dye adsorption using chitosan-calcium chloride gel beads
Published in Chemical Engineering Communications, 2021
S. Y. Tay, V. L. Wong, S. S. Lim, I. L. R. Teo
Over half of the commercial synthetic dyes originates from the textile industry, and approximately 100 tons of this effluent are released yearly (Katheresan et al. 2018). Evidently, fast fashion predominantly contributes to the increasing demand in the textile industry. The market of fast fashion approached an astonishing 1.65 trillion US dollars in sales worldwide, with a yearly market growth of 5.91% (Singh 2017). With a huge expansion of dye usage in textile industry, there is a clear absence of utilizing natural dyes in mainstream productions as synthetic dyes are proven to be a cheaper and higher quality option (León et al. 2018). The harmful chemicals present in synthetic dyes could pose a major threat to the environment if these dye effluents are released without proper treatment. In addition to that, synthetic dyes are inert and recalcitrant components, therefore they are difficult to be removed from wastewater effluents (Shajahan et al. 2017). The aromatic structure and nitrogen component of the dyes also contribute to the complexity of removing them from wastewater (Zhai et al. 2018).