Felix Netzer, Avinash P. Manian, Thomas Bechtold, Tung Pham
{"title":"纤维素阳离子化水平和分子染料结构对吸附和迁移行为的影响","authors":"Felix Netzer, Avinash P. Manian, Thomas Bechtold, Tung Pham","doi":"10.1016/j.dyepig.2025.113260","DOIUrl":null,"url":null,"abstract":"<div><div>The occurrence of unlevel colouration in salt-free reactive dyeing of cationised cellulose textiles represents a significant hindrance in the replacement of conventional reactive dyeing processes. The phenomenon is attributed to the rapid adsorption of dye molecules onto cationised cellulose. However, it is hypothesised that the migration ability and the strength of the dye fibre interaction are responsible for poor levelling. In this study, three anionic dyes – C.I. Acid Blue 25, C.I. Reactive Blue 19 and C.I. Reactive Red 120 – were utilised to examine the rates of sorption, the extent of migration, and the relative affinity of the dye molecules to cationised cellulose fibres. It was observed that at low cationisation levels, the sorption rates, especially for larger dye molecules, were slowed down. This phenomenon is attributed to slow intraparticle diffusion. In migration test and dye exchange experiments, it was observed that the relative affinity of a dye molecule to cationised cellulose determines the extent of dye migration and dye exchange. It was concluded that the primary factors contributing to the non-uniformity observed in the dyeing process were the high affinity of dye molecules and thus low migration ability, and the incomplete saturation of cationic groups by dye molecules, i.e. when complete dye exhaustion occurs due to too high cationisation levels for the desired colour shade, rather than the rate of sorption.</div></div>","PeriodicalId":302,"journal":{"name":"Dyes and Pigments","volume":"245 ","pages":"Article 113260"},"PeriodicalIF":4.2000,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effect of cellulose cationisation level and molecular dye structure on sorption and migration behaviour\",\"authors\":\"Felix Netzer, Avinash P. Manian, Thomas Bechtold, Tung Pham\",\"doi\":\"10.1016/j.dyepig.2025.113260\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>The occurrence of unlevel colouration in salt-free reactive dyeing of cationised cellulose textiles represents a significant hindrance in the replacement of conventional reactive dyeing processes. The phenomenon is attributed to the rapid adsorption of dye molecules onto cationised cellulose. However, it is hypothesised that the migration ability and the strength of the dye fibre interaction are responsible for poor levelling. In this study, three anionic dyes – C.I. Acid Blue 25, C.I. Reactive Blue 19 and C.I. Reactive Red 120 – were utilised to examine the rates of sorption, the extent of migration, and the relative affinity of the dye molecules to cationised cellulose fibres. It was observed that at low cationisation levels, the sorption rates, especially for larger dye molecules, were slowed down. This phenomenon is attributed to slow intraparticle diffusion. In migration test and dye exchange experiments, it was observed that the relative affinity of a dye molecule to cationised cellulose determines the extent of dye migration and dye exchange. It was concluded that the primary factors contributing to the non-uniformity observed in the dyeing process were the high affinity of dye molecules and thus low migration ability, and the incomplete saturation of cationic groups by dye molecules, i.e. when complete dye exhaustion occurs due to too high cationisation levels for the desired colour shade, rather than the rate of sorption.</div></div>\",\"PeriodicalId\":302,\"journal\":{\"name\":\"Dyes and Pigments\",\"volume\":\"245 \",\"pages\":\"Article 113260\"},\"PeriodicalIF\":4.2000,\"publicationDate\":\"2025-09-20\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Dyes and Pigments\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0143720825006308\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, APPLIED\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Dyes and Pigments","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0143720825006308","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, APPLIED","Score":null,"Total":0}
Effect of cellulose cationisation level and molecular dye structure on sorption and migration behaviour
The occurrence of unlevel colouration in salt-free reactive dyeing of cationised cellulose textiles represents a significant hindrance in the replacement of conventional reactive dyeing processes. The phenomenon is attributed to the rapid adsorption of dye molecules onto cationised cellulose. However, it is hypothesised that the migration ability and the strength of the dye fibre interaction are responsible for poor levelling. In this study, three anionic dyes – C.I. Acid Blue 25, C.I. Reactive Blue 19 and C.I. Reactive Red 120 – were utilised to examine the rates of sorption, the extent of migration, and the relative affinity of the dye molecules to cationised cellulose fibres. It was observed that at low cationisation levels, the sorption rates, especially for larger dye molecules, were slowed down. This phenomenon is attributed to slow intraparticle diffusion. In migration test and dye exchange experiments, it was observed that the relative affinity of a dye molecule to cationised cellulose determines the extent of dye migration and dye exchange. It was concluded that the primary factors contributing to the non-uniformity observed in the dyeing process were the high affinity of dye molecules and thus low migration ability, and the incomplete saturation of cationic groups by dye molecules, i.e. when complete dye exhaustion occurs due to too high cationisation levels for the desired colour shade, rather than the rate of sorption.
期刊介绍:
Dyes and Pigments covers the scientific and technical aspects of the chemistry and physics of dyes, pigments and their intermediates. Emphasis is placed on the properties of the colouring matters themselves rather than on their applications or the system in which they may be applied.
Thus the journal accepts research and review papers on the synthesis of dyes, pigments and intermediates, their physical or chemical properties, e.g. spectroscopic, surface, solution or solid state characteristics, the physical aspects of their preparation, e.g. precipitation, nucleation and growth, crystal formation, liquid crystalline characteristics, their photochemical, ecological or biological properties and the relationship between colour and chemical constitution. However, papers are considered which deal with the more fundamental aspects of colourant application and of the interactions of colourants with substrates or media.
The journal will interest a wide variety of workers in a range of disciplines whose work involves dyes, pigments and their intermediates, and provides a platform for investigators with common interests but diverse fields of activity such as cosmetics, reprographics, dye and pigment synthesis, medical research, polymers, etc.