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1.
Marta Biernacka Tatsiana Ilyich Ilya Zavodnik Bartomiej Paecz Artur Stepniak 《International journal of molecular sciences》2022,23(1)
In the presented studies, the interactions between ezetimibe (EZE) and selected cyclodextrins were investigated. α-Cyclodextrin (αCD), β-cyclodextrin (βCD) and its modified derivatives, hydroxypropyl-β-cyclodextrin (HPβCD) and sulfobutylether-β-cyclodextrin (SBEβCD), were selected for the research. Measurements were carried out using calorimetric and spectroscopic methods. Additionally, the Hirshfeld surface and biochemical analysis were achieved. As a result of the study, the inclusion complexes with 1:1 stoichiometry were obtained. The most stable are the complexes of β-cyclodextrin and its derivatives. The comparison of βCD with its derivatives shows that the modifications have an affect on the formation of more durable and stable complexes. 相似文献
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The synthesis, some dyeing, and fastness properties of several new dispersed and acid dyes derived from the amino-benzotriazoles 1 & 3 and the aminobenzimidazoles 2a , 2b & 4 are described. The suitability of the amino derivatives 1 , 2a , 2b , 3 & 4 as bases for azoic dyeing has also been studied. Several interesting observations between the properties of some synthesised dyes and the corresponding benzene or naphthalene analogues are cited. 相似文献
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New catalytic systems for selective oxidation of aromatic compounds by hydrogen peroxide 总被引:4,自引:0,他引:4
E. A. Karakhanov T. Yu. Filippova S. A. Martynova A. L. Maximov V. V. Predeina I. N. Topchieva 《Catalysis Today》1998,44(1-4):189-198
Some new water-soluble catalytic systems based on iron complexes of polyethylene oxide and block copolymers of ethylene oxide and propylene oxide functionalized by catechol or β-cyclodextrin have been developed. These complexes were examined as catalysts for biomimetic hydroxylation of benzene and phenol by hydrogen peroxide. It is shown that the introduction of β-cyclodextrin into the polyethylene oxide molecule is favourable for rate and selectivity of hydroxylation of aromatic compounds in a two-phase system. 相似文献
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K. Sreenivasan 《应用聚合物科学杂志》1996,59(13):2089-2093
β-Cyclodextrin was blended with poly(vinyl chloride) to study the influence of β-cyclodextrin on the leaching of phthalate ester from PVC. β-Cyclodextrin was found to reduce the migration of phthalate ester. The considerable effect of β-cyclodextrin on the leaching of phthalate ester was traced to the formation of an inclusion complex formation between the two components. © 1996 John Wiley & Sons, Inc. 相似文献
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Cesar G. Gomez Grard Chambat Alain Heyraud Marcelo Villar Rachel Auzly-Velty 《Polymer》2006,47(26):8509-8516
Selective chemical modification of both β-cyclodextrin (β-CD) and sodium alginate (alg) was performed in order to produce an alginate derivative possessing pendant β-CD cavities along the chain. The latter was then fully characterized in terms of chemical integrity and purity, complexation properties and ability to form hydrogels. Thus, a sodium alginate derivative modified with adipic dihydrazide (alg-ADH) and a β-cyclodextrin derivative possessing an aldehyde function on the primary face were synthesized, and both were selectively coupled by a reductive amination-type reaction. Comparison of the complexation properties of the grafted and natural β-CDs by isothermal titration calorimetry using sodium adamantane acetate as a model guest gave similar enthalpy values suggesting similar mechanisms of binding. However, the association constant for the grafted CD is slightly lower as a result of a less favorable change in the binding entropy. Investigation of the gelation ability in the presence of calcium ions led to the following order: alg > alg-ADH > alg-CD. The decrease of gelation efficiency for the modified alginate samples reflected the reduction of ionic interchain bonds as a result of the unavailability or non-accessibility of G units on the alginate backbone, due to the chemical modification and steric effect of the CD molecule for alg-CD. 相似文献
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Synthesis of acid dyes containing polyetheramine moieties and their low‐temperature dyeing properties on wool fiber
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To realize the low‐temperature dyeing of wool fibers, the use of auxiliaries and wool modification are common methods. Low‐temperature auxiliaries may cause water‐pollution problems, and wool modification is a costly and uncontrollable process. In this study, new acid dyes, named D1–D3, containing polyetheramine groups were synthesized and applied to wool fiber by conventional and low‐temperature exhaust dyeing procedures. The results indicate that the new acid dyes could interact with wool‐fiber‐like auxiliaries and render a high exhaustion rate to the wool fiber at a dyeing temperature of 80 °C. In comparison with Acid Blue 25, the D1–D3 dyes showed an increased dyeing rate, especially under a dyeing temperature of 80 °C. Despite the bigger relative molecular masses of D1–D3, the exhaustion rates of D1–D3 were still higher, and the times of half‐dyeing were shorter than that of Acid Blue 25. The color differences between the wool fabrics dyed with the four dyes at 80 and 98 °C, respectively, were compared. We found that the color differences of D1–D3 between 80 and 98 °C were smaller than that of Acid Blue 25. The interactions between the dyes and wool fiber were analyzed and manifested by the measurement of the ζ potential of the dyes and wool fiber. The leveling and transfer properties of the D1–D3 dyes were also investigated, and the color differences of the wool fabrics dyed with Acid Blue 25, D1, and D2 were very low at all measured pH values and temperatures. The fastnesses of D1–D3 on wool fabric were almost the same as that of Acid Blue 25. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135, 45793. 相似文献
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David W Jenkins Khaled El-Tahlawy Ahmed El-Shafei Harold S Freeman Samuel M Hudson 《Coloration Technology》2006,122(6):345-349
A candidate polymeric size was synthesised by the polymerisation of γ -cyclodextrin with epichlorohydrin under alkaline conditions. The motivation for the synthesis was to produce a polymer that could not only function as a warp size for fabric formation, but also serve as a host for dye molecules that could subsequently be released after the weaving process, ultimately promoting the merging of fabric formation and coloration processes. The γ -cyclodextrin/epichlorohydrin polymer has been found to promote the dissolution of textile dyes, such as CI Disperse Blue 3, CI Disperse Yellow 82 and CI Disperse Red 91 to yield pad baths capable of evenly coating polyester fabric. Upon padding and subsequent drying, the dye– γ -cyclodextrin/epichlorohydrin polymer pad baths have been used for dyeing the fabric upon thermofixation. Furthermore, cross-sections of fibre dyed in the same manner indicate dye penetration into the fibre. 相似文献
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Wool fibers treated with oxygen low‐temperature plasma, liquid ammonia (NH3), and high‐pressure (HP) steam were dyed with two acid and three disperse dyes. Rate of dyeing, saturation dye uptake, and dyeing transition temperature were measured. Rate of dyeing of the O2 plasma, NH3, and HP steam‐treated wools increased with acid dyes, whereas it did not increase with disperse dyes. Although dyeing transition temperature for acid dyes was decreased by the plasma, NH3, and HP steam treatments, the temperature for disperse dyes was not changed by the treatments. Therefore, it seems that acid dyes penetrate by the intercellular diffusion through the interscale Cell Membrane Complex (CMC) of wool, whereas disperse dyes penetrate by the intracellular diffusion through the intrascale cuticle surface independently with CMC relaxation by the treatments. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 80: 1058–1062, 2001 相似文献
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Microencapsulated disperse dye can be used to dye hydrophobic fabric in the absence of auxiliaries and without reduction clearing. However, little available information for dyeing practice is provided with respect to the effect of microencapsulation on the dyeing behaviors of disperse dyes. In this research, disperse dyes were microencapsulated under different conditions. The dyeing behaviors and dyeing kinetic parameters of microencapsulated disperse dye on PET fiber, e.g., dyeing curves, build up properties, equilibrium adsorption capacity C∞, dyeing rate constant K, half dyeing time t1/2, and diffusion coefficient D were investigated without auxiliary solubilization and compared with those of commercial disperse dyes with auxiliary solubilization. The results show that the dyeing behaviors of disperse dye are influenced greatly by microencapsulation. The diffusion of disperse dyes from microcapsule onto fibers can be adjusted by the reactivity of shell materials and mass ratios of core to shell. The disparity of diffusibility between two disperse dyes can be reduced by microencapsulation. In addition, the microencapsulation improves the utilization of disperse dyes due to no auxiliary solubilization. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011 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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Three series of phenylazo disperse dyes were prepared by coupling diazotised 4‐aniline dyes with 5‐indol‐2‐one dyes. The structures of these dyes were determined by proton nuclear magnetic resonance, Fourier Transform–infrared and elemental analysis. The effects of solvent on the ultraviolet–visible absorption spectra of these dyes were studied. The dyes displayed a λmax shift of between 399 and 438 nm. The dyes were finally applied in the dyeing of polyester fibres in order to investigate their colour range and dyeing properties. Most of the dyes displayed high rubbing fastness and good washing and sublimation fastnesses on polyester fibres. 相似文献
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Hirokazu Shiga Hidefumi Yoshii Taiji Nishiyama Takeshi Furuta Pirkko Forssele Kaisa Poutanen Pekka Linko 《Drying Technology》2001,19(7):1385-1395
The flavor inclusion powder was prepared by spray drying, using the combined encapsulation method of inclusion by β-cyclodextrin (β-CD) and emulsified by gum arabic (GA). d-Limonene and ethyl n-hexanoate were used as model flavors. The application of high pressure by Microfluidizer to the mixture of flavors and β-CD slurry was an effective means of forming inclusion complex. Flavor retention during spray drying under various compositions of the encapsulants was investigated. The flavor retention using the blended encapsulant was increased by adding GA in the encapsulant. The characteristics of release of encapsulated flavor during storage were evaluated at 50°C and 75% of relative humidity. The release rate of flavor in spray-dried powder depended on kinds of the flavors and composition of the encapsulant. The blending MD and β-CD in the feed liquid decreased the release rate of flavors. The rate of release of flavor was analyzed by Avrami's Equation. 相似文献
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世界染料与染整工艺科技创新 总被引:4,自引:6,他引:4
根据染料母体的生物相容性论述了非诱变性染料和仿生染料在纺织纤维着色中的发展方向;论述了实现高固色率活性染料的有效途径以及通过交联染色方法实现染料与纤维近100%化学结合的可行性;介绍了环境友好染色新工艺,活性染料无盐染色,还原染料和硫化染料生化法还原或电还原法染色,非水溶剂染色以及喷墨印染技术。 相似文献
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Thirty-five acid dyes suitable for dyeing wool and polyamide fibres were synthesized, using derivatives of arylsulphonanilides prepared from o-nitrotoluene or chloronitrotoluene. As coupling components, derivatives of 1-phenyl-3-methylpyrazolone-5 and 2-naphthol were used. Fastness and colour properties of the prepared dyes were determined. It was found that some of the prepared dyes on polyamide fibres show batho- and hypso-chromic effects as well as hypo- and hyper-chromic effects during testing of their fastness to washing and to acid and alkaline perspiration. Spectroscopic examinations and determination of pKa of the sulphonamide and hydroxyl groups of the dyes showed that the observed changes are associated with aggregation or disaggregation of the dyes on fibres or with a change in the azo-hydrazone equilibrium. Some of the prepared dyes are characterized by very good dyeing and fastness properties. 相似文献
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为实现槐米染料的工业化应用及提高棉织物的功能性,分析了使用壳聚糖、Al3+、Fe2+媒染剂预媒染色法对棉织物染色效果的影响,重点研究了铝预媒染方法染色温度、染色时间、pH值等工艺参数对染色棉织物K/S值的影响,并测试了槐米染色棉织物的抗紫外性能。结果表明:直接使用槐米染色的效果较差;壳聚糖媒染对上染效果影响不大,使用铝、铁媒染剂,可得到不同颜色的棉织物;铝媒染剂染色棉织物为鲜艳的黄色,为较好的媒染方法;铝预媒染染色方法染色优化条件为:温度为80℃,染色时间120分钟,染浴pH值为6.8;铝预媒染染色棉织物具有较好的抗紫外性能。 相似文献
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介绍了锌金属和镀锌层染色的特点,选择染料的原则及适用的染料类型(包括媒介染料、直接染料、酸性染料、活性染料和可溶性还原染料)。从染料的表面活性,染料与铬酸盐转化膜之间的作用力,染色过程及染色层的位置等方面阐述了锌金属和镀锌层染色的机理。 相似文献