Wei Wu, Bo Fan, Qingqing Zhou, Qingyong Zhao, Yi Zhong, Hong Xu, Jian Wang, Zhiping Mao
{"title":"超临界二氧化碳流体中聚酯分子链弛豫行为对染色性能的影响","authors":"Wei Wu, Bo Fan, Qingqing Zhou, Qingyong Zhao, Yi Zhong, Hong Xu, Jian Wang, Zhiping Mao","doi":"10.1111/cote.12809","DOIUrl":null,"url":null,"abstract":"<p>This study investigated the mechanism of dye uptake in supercritical carbon dioxide fluid (ScCO<sub>2</sub>) by examining fibre swelling and molecular chain relaxation. The swelling rate of 30 D/3 Fila polyester fibres was tested under varying temperatures and pressures using a high-temperature and high-pressure in situ imaging platform. The swelling rate increased with temperature and pressure, but the rate of increase slowed above 100°C. The Williams–Landel–Ferry equation was used to analyse the relationship between the thermal relaxation of polyester macromolecular chains and dye uptake at high pressure (27 MPa) during ScCO<sub>2</sub> dyeing. For dyes with poor solubility, dyeing behaviour above 100°C aligns closely with the free volume diffusion model. Conversely, for dyes with good solubility, dyeing behaviour follows the free volume diffusion model within the 50-100°C range and reaches equilibrium above 100°C.</p>","PeriodicalId":10502,"journal":{"name":"Coloration Technology","volume":"141 5","pages":"630-639"},"PeriodicalIF":2.2000,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Influence of the relaxation behaviour of polyester molecular chains in supercritical carbon dioxide fluid on dyeing performance\",\"authors\":\"Wei Wu, Bo Fan, Qingqing Zhou, Qingyong Zhao, Yi Zhong, Hong Xu, Jian Wang, Zhiping Mao\",\"doi\":\"10.1111/cote.12809\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>This study investigated the mechanism of dye uptake in supercritical carbon dioxide fluid (ScCO<sub>2</sub>) by examining fibre swelling and molecular chain relaxation. The swelling rate of 30 D/3 Fila polyester fibres was tested under varying temperatures and pressures using a high-temperature and high-pressure in situ imaging platform. The swelling rate increased with temperature and pressure, but the rate of increase slowed above 100°C. The Williams–Landel–Ferry equation was used to analyse the relationship between the thermal relaxation of polyester macromolecular chains and dye uptake at high pressure (27 MPa) during ScCO<sub>2</sub> dyeing. For dyes with poor solubility, dyeing behaviour above 100°C aligns closely with the free volume diffusion model. Conversely, for dyes with good solubility, dyeing behaviour follows the free volume diffusion model within the 50-100°C range and reaches equilibrium above 100°C.</p>\",\"PeriodicalId\":10502,\"journal\":{\"name\":\"Coloration Technology\",\"volume\":\"141 5\",\"pages\":\"630-639\"},\"PeriodicalIF\":2.2000,\"publicationDate\":\"2025-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Coloration Technology\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1111/cote.12809\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"CHEMISTRY, APPLIED\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Coloration Technology","FirstCategoryId":"88","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1111/cote.12809","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, APPLIED","Score":null,"Total":0}
Influence of the relaxation behaviour of polyester molecular chains in supercritical carbon dioxide fluid on dyeing performance
This study investigated the mechanism of dye uptake in supercritical carbon dioxide fluid (ScCO2) by examining fibre swelling and molecular chain relaxation. The swelling rate of 30 D/3 Fila polyester fibres was tested under varying temperatures and pressures using a high-temperature and high-pressure in situ imaging platform. The swelling rate increased with temperature and pressure, but the rate of increase slowed above 100°C. The Williams–Landel–Ferry equation was used to analyse the relationship between the thermal relaxation of polyester macromolecular chains and dye uptake at high pressure (27 MPa) during ScCO2 dyeing. For dyes with poor solubility, dyeing behaviour above 100°C aligns closely with the free volume diffusion model. Conversely, for dyes with good solubility, dyeing behaviour follows the free volume diffusion model within the 50-100°C range and reaches equilibrium above 100°C.
期刊介绍:
The primary mission of Coloration Technology is to promote innovation and fundamental understanding in the science and technology of coloured materials by providing a medium for communication of peer-reviewed research papers of the highest quality. It is internationally recognised as a vehicle for the publication of theoretical and technological papers on the subjects allied to all aspects of coloration. Regular sections in the journal include reviews, original research and reports, feature articles, short communications and book reviews.