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聚对苯二甲酸丁二酯纤维在超临界二氧化碳介质中的染色研究 总被引:4,自引:0,他引:4
用超临界二氧化碳作介质,在40~120℃,10~30MPa条件下使用分散染料对聚对苯二甲酸丁二酯(PBT)纤维进行染色试验,并测定了3种分散染料在超临界二氧化碳介质中的溶解度。研究了染色温度、压力、时间及染料结构对染料上染量的影响,考察了染料溶解度与染料上染量的关系。试验表明,在80℃,20MPa下,染色30min,PBT纤维能得到良好的染色效果,上染量达4.01mg/g(分散红60)、2.43mg/g(分散黄23)、11.19mg/g(分散蓝79)。 相似文献
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丙纶是水系染色困难的纤维,利用超临界二氧化碳的染色技术实现了丙纶染色的可能性。利用超临界流体的染色技术,为了使作为染色介质的二氧化碳流体循环使用,不排出染色废液可以染色面料,近年来对这一技术研究盛行。 相似文献
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超临界CO2染色技术是一种新型的绿色环保染色技术,超临界CO2中分散染料在涤纶织物中的扩散性能是超临界CO2染色技术的一个重要基础。为了研究超临界CO2中分散染料在涤纶织物中的扩散性能,研究采用"卷层法",在温度70~110℃,压力16~24 MPa下,选用分散红54在自行研制的超临界CO2染色装置中对涤纶织物进行超临界CO2染色扩散实验。实验结果表明,染料在涤纶织物中的扩散过程是一边上染纤维一边向纤维内部扩散的过程,所建立的染色—扩散模型成功地描述了这一过程。随着温度的升高,染色速率系数与扩散系数之比随之增大,随着压力的升高,两者之比先升后降。 相似文献
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介绍了超临界二氧化碳染色具有染色时间短、匀染透染性好、染后不用还原清洗等优点,且整个染色过程中不会造成任何污染,解决了传统染色工艺使用大量的水造成浪费大,存在环境污染严重及资源消耗和有机溶剂染色的生态、成本、很难工业化应用的问题。同时介绍了超临界二氧化碳染色法的基本原理,对国内外超临界二氧化碳染色技术在合成纤维和天然纤维纺织品染色中的研究现状作了全面分析,并对其发展前景进行了展望。 相似文献
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The level dyeing of fabrics in supercritical carbon dioxide was investigated by employing an improved beam (a perforated pipe on which the knitted or woven fabric/warp is wound around). The effects of system temperature, pressure, dyeing time, a time ratio of fluid circulation to static dyeing (Rtime), different fabric layers wrapped around the beam, and the species and chemical structures of dyestuffs on leveling properties and color strength of polyester and cotton fabrics were observed. The results show that the leveling properties and color strength of fabrics were improved on the new beam, as well as with a favorably increased system temperature, pressure, dyeing time, and a time ratio of fluid circulation to static dyeing; while the leveling property and color strength decreased with fabric layers on the beam under an identical condition. Highly leveling results were obtained on polyester and cotton fabrics with disperse and reactive disperse dyes involving different chemical structures. 相似文献
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Polypropylene fibers were dyed in supercritical carbon dioxide system and the results were compared with those of fiber dyed
in water system. Dye uptake value calculated by a UV spectrum indicated that polypropylene fiber dyeing was much better in
carbon dioxide than in water. Optical microscopical analysis showed that dye molecules had diffused thoroughly into fiber
in CO2 because of the excellent compatibility between the dye and the CO2. X-ray and birefrigence analysis demonstrated that plastification caused by the implementation of CO2 made molecular chain more mobile and led to an increase in the dyeing of polypropylene fibers. Moreover a mechanical test
and DSC analysis indicated that the fiber structure was not damaged when the fabric was dyed at 100 °C. Hence dyeing polypropylene
using CO2 as a transport medium was very feasible and worthy of further development. 相似文献
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《国际聚合物材料杂志》2012,61(4):657-665
Abstract Dyeing is supercritical CO2 is one of the most advanced dyeing technologies. The dyeing medium is not water but carbon dioxide in the supercritical state (temperatures above 31°C and pressures above 74 bar). The effect of pressure and temperature on dyeing of PET in supercritical CO2 with only one dye and with mixtures of two or three dyes has been investigated. The variations of pressure (250 in 300 bar) and temperature (70 in 130°C) cause differences in colour, especially when mixtures of dyes are used. The dyed samples were evaluated using colorimetry and the extraction of dyes from the fabric. The amount of all dyes on the fabric rises with the rising temperature due to the accelerated motion of molecular chains and the formation of the free volume in the fibre, so important for the diffusion of dyes. The change of pressure does not after the amount of fixed dyes significantly, but the ratio between the dyes is changed when dyeing with mixtures of dyes. 相似文献
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近年我国染料学科的理论创新和技术进步 总被引:1,自引:1,他引:1
综述了近年我国染料科学的理论创新和技术进步。关于染料与纤维着色包括超分子化学理论、化学交联染色和通用染料的概念以及纤维表面结构生色、仿生染料;运用量子化学理论对染料分子进行计算,预测染料分子的物理化学性质或用于指导染料分子的设计;根据染色动力学,建立染色过程的数学模型;纳米二氧化钛作为光催化反应的催化剂,可用于硝基物控制还原、卫生整理、染料和印染污水的降解。这些创新理论和技术进步核心就是提高资源的优化程度和环境保护,必将有力促进我国染料工业向更高层次发展。 相似文献