Solaiman Bin Ali, Md Shakirul Islam, Merin Jahan Sabiha
{"title":"The impact of nanotechnology on textile coloration—A mini-review","authors":"Solaiman Bin Ali, Md Shakirul Islam, Merin Jahan Sabiha","doi":"10.1111/cote.70014","DOIUrl":"https://doi.org/10.1111/cote.70014","url":null,"abstract":"<p>Coloration is a key feature in the textile industry that adds value to the final apparels. This coloration of textile products is done by conventional methods which involve huge amounts of water pollution and wastages of textile colourants. Several approaches have been taken to eliminate these issues by advanced dyeing methods, however, due to process complexity advanced dyeing methods are still inconvenient on an industrial scale. Recently, involvement of nanotechnology via nanofibre or nano-colourants has drawn attention to the textile coloration field as these approaches are feasible with conventional textile coloration methods. Adding to that, reducing the wastage of textile colourants and wastewater pollution, and enhancing colour strength and better colour fastness properties by applying nanotechnology in coloration opens new dimensions. Previously, some studies have been done on nanofibre synthesis methods and application of nano-chemicals for enhancing the functional properties, but less attention has been put on textile coloration efficiency enhancement by applying nanofibre or nano-colourants. Therefore, this study emphasised on discussing nanofibres and nano-colourants synthesis by different approaches for textile purposes, dye–fibre interaction during textile coloration, and their impact on textile coloration performances—how those nanomaterials enhance the colour appearance and durability in textile fabrics, and the challenges that needs to be considered for bulk textile coloration.</p>","PeriodicalId":10502,"journal":{"name":"Coloration Technology","volume":"142 1","pages":"26-51"},"PeriodicalIF":2.2,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.70014","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145941796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Application of derivative spectrophotometry in textiles: a review","authors":"Ali Shams-Nateri, Anis Zeydabadinezhad","doi":"10.1111/cote.12834","DOIUrl":"https://doi.org/10.1111/cote.12834","url":null,"abstract":"<p>One of the most important analytical techniques in spectral data analysis is derivative spectrophotometry. This technique can increase the signal-to-noise ratio in the qualitative and quantitative analysis of multi-component samples. The appearance of the derivative spectrum, such as height, width and distance between the maximum peaks, changes with the derivative order. Additionally, derivative spectrophotometry has been used to analyse overlapping spectra of multi-component samples, improve the resolution of overlapping peaks and remove the background as noise. Derivative spectrophotometry has been applied to analyse infrared spectra, fluorescence spectra and ultraviolet–visible spectra data. The five most used methods are peak-zero, zero-crossing point, peak-peak-ratio, peak-tangent and ratio of spectra. The concentrations of coloured components in binary and ternary mixtures of dyes were estimated using peak-zero, zero-crossing point, peak-peak-ratio and ratio of spectra derivative spectrophotometry. The derivative method has been used in several scientific fields, such as characterisation of pigments, characterisation of colourants, identification of pigments in artworks, realistic texture reconstruction of an artwork, characterisation of dyes in ancient purple codices, quantitative analysis of mixed pigments, identification of natural polymers and resins in paintings, determination of food dyes, characterisation of paintings, identification of artists' materials, identification of the natural dyes and identification of pigments. The derivative method has also been applied in the textile industry, including fibre identification, prediction of dye concentrations in solution, analysis of dyes in wastewater, analysis of natural dyes and dyeing recipe prediction.</p>","PeriodicalId":10502,"journal":{"name":"Coloration Technology","volume":"142 1","pages":"5-25"},"PeriodicalIF":2.2,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145931153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Maria Luiza de Oliveira Zanini, Camila Rios Piecha, Ketnen Rieffel das Chagas, Patrícia Silva Diaz
{"title":"Coloured polyhydroxyalkanoates: A review","authors":"Maria Luiza de Oliveira Zanini, Camila Rios Piecha, Ketnen Rieffel das Chagas, Patrícia Silva Diaz","doi":"10.1111/cote.70013","DOIUrl":"https://doi.org/10.1111/cote.70013","url":null,"abstract":"<p>Polyhydroxyalkanoates (PHAs) are a class of biopolymers produced by various microorganisms, with poly(3-hydroxybutyrate) being the most extensively studied. PHAs are widely studied as substitutes for conventional plastics due to their similar physicochemical properties. However, the production cost of PHAs remains high. In this context, the use of colours in biopolymers is a marketing tool that plays a significant role in influencing consumer purchasing behaviour. Therefore, the aim of this study was to review, analyse and compare different methodologies for colouring PHAs published to date. Studies reported various methods for colouring PHA films, which were classified into two main methodologies: (i) simultaneous synthesis and colouring of PHAs; and (ii) production and colouring of PHAs in different stages. The analysis revealed that the field of PHA colouring is still under-explored, with relatively few studies conducted to date. Further research is required to optimise the production processes for coloured biopolymers. Additionally, there is a need to investigate new classes of natural dyes for colouring PHA films and their application in innovative, environmentally sustainable products, such as intelligent and biodegradable packaging. This review article is the first to systematically assess the methodologies for colouring PHA films.</p>","PeriodicalId":10502,"journal":{"name":"Coloration Technology","volume":"141 5","pages":"603-620"},"PeriodicalIF":2.2,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.70013","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145021821","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Michele Schmidt, Rachel Falkowski, Riikka Räisänen, Tova N. Williams Cherry
{"title":"Exploration of the natural dye alizarin for supercritical carbon dioxide dyeing of polyester, polyamide and cellulose acetate fibres","authors":"Michele Schmidt, Rachel Falkowski, Riikka Räisänen, Tova N. Williams Cherry","doi":"10.1111/cote.70000","DOIUrl":"https://doi.org/10.1111/cote.70000","url":null,"abstract":"<p>Conventional textile dyeing utilises large amounts of water and generates significant amounts of wastewater, highlighting the need to utilise more sustainable dyeing methods. Supercritical carbon dioxide (scCO<sub>2</sub>) dyeing offers a zero-water, zero-wastewater alternative with reduced energy requirements and carbon dioxide recyclability. While both conventional and scCO<sub>2</sub> dyeing commonly rely on synthetic (petroleum-based) dyes, incorporating natural dyes could enhance the sustainability of scCO<sub>2</sub> dyeing by reducing dependence on non-renewable resources. Thus, this study evaluated alizarin, an aglycone anthraquinone dye from <i>Rubia tinctorum</i> L. (madder plant), in scCO<sub>2</sub> without any mordant or auxiliaries. Alizarin was selected for its historical significance, colour intensity and colour stability. Its performance was compared with two additional madder-derived compounds, the glycosides ruberythric acid (RA) and lucidin primeveroside (LP). Dyes (0.5%, 1% owf) were applied to polyethylene terephthalate (PET) at 120°C and 34 MPa for 60 minutes. Findings indicated that only deglycosylated dye (aglycone) exhibited high uptake (≥65%), while RA/LP exhibited a lower uptake (27.1% ± 2.7%) on PET due to their hydrophilicity. Indeed, alizarin exhibited higher uptake on both PET and recycled PET (r-PET) fibres in scCO<sub>2</sub>, with a maximum uptake of 95.7% ± 4.3% exhibited on r-PET. Furthermore, alizarin uptake on PET using scCO<sub>2</sub> as the dyeing medium was comparable to or higher than that achieved with water. Dye uptake, colour and fastness properties were also comparable to those of C.I. Disperse Yellow 54, a synthetic dye.</p>","PeriodicalId":10502,"journal":{"name":"Coloration Technology","volume":"141 6","pages":"889-908"},"PeriodicalIF":2.2,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.70000","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145480175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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