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

IF 2.2 4区 工程技术 Q3 CHEMISTRY, APPLIED
Wei Wu, Bo Fan, Qingqing Zhou, Qingyong Zhao, Yi Zhong, Hong Xu, Jian Wang, Zhiping Mao
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引用次数: 0

摘要

本研究通过观察纤维膨胀和分子链弛豫来研究超临界二氧化碳流体中染料的吸收机理。使用高温高压原位成像平台测试了30d /3 Fila聚酯纤维在不同温度和压力下的膨胀率。膨胀率随温度和压力的增加而增加,但在100℃以上增加速度减慢。采用Williams-Landel-Ferry方程分析了高压(27 MPa) ScCO2染色过程中聚酯大分子链的热弛豫与染料吸收量的关系。对于溶解度差的染料,在100°C以上的染色行为与自由体积扩散模型密切相关。相反,对于溶解度好的染料,在50-100℃范围内,染色行为遵循自由体积扩散模型,在100℃以上达到平衡。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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.

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来源期刊
Coloration Technology
Coloration Technology 工程技术-材料科学:纺织
CiteScore
3.60
自引率
11.10%
发文量
67
审稿时长
4 months
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.
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