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1.
Following the previous studies regarding blue and yellow dyes, a series of new red dyes having different length of alkyl substituents
on the same chromophore were synthesized in order to dye unmodified polypropylene fiber. The affinity of the dyes onto unmodified
polypropylene fiber was increased with the increase of the length of alkyl substituents. Therefore, the longest hexyl-substituted
dye showed very deep shade of dyeing with K/S value of around 30 at maximum absorption wavelength. Within the range below 2 % o.w.f., the exhaustion (%) showed more than
80 %. The color fastnesses to washing, rubbing, and light of the dyeings were also improved greater for the dyes having longer
alkyl substituents than the shorter ones. Since color hue of the dyes exhibited very strong red, they could be considered
to be used as the primary red color dyes for unmodified polypropylene fibers. 相似文献
2.
Synthesis and application of alkyl-substituted disazo yellow dyes for unmodified polypropylene fiber
Taekyeong Kim Jongsuc Jung Songi Son Seokhan Yoon Mikyung Kim Jin-Seok Bae 《Fibers and Polymers》2008,9(5):538-543
The several disazo dyes having different alkyl substituents were synthesized to dye unmodified polypropylene fiber. The affinity
of the dyes onto unmodified polypropylene was increased with the increase of the length of alkyl substituents. Therefore,
the heptyl-substituted dye having the longest alkyl group in this experiment showed very high color strength of dyeings with
K/S value of over 24 at maximum absorption wavelength. The color fastnesses to washing, rubbing and light were also improved
significantly for the longer alkyl substituted dyes, so that the heptyl-substituted dye exhibited a rating of 4∼5 for all
kinds of fastnesses. 相似文献
3.
Taekyeong Kim Jongsuc Jung Kyungjin Jang Seokhan Yoon Mikyung Kim 《Fibers and Polymers》2009,10(2):148-153
A series of new monoazo yellow dyes having different alkyl substituents was synthesized to dye unmodified polypropylene fiber.
Color hue of the dyes exhibited light yellow with very high chroma enough to use as yellow primary color dyes. The affinity
of the dyes onto unmodified polypropylene was increased with the increase of the length of alkyl substituents. Therefore,
the hexyl-substituted dye having the longest alkyl group in this experiment showed very high color strength of dyeings with
K/S value of over 26 at maximum absorption wavelength. The color fastnesses to washing, rubbing and light were also improved
significantly for the longer alkyl substituted dyes, so that the hexyl-substituted dye exhibited a rating higher than 4∼5
for all kinds of fastnesses. 相似文献
4.
UHMWPE fibers were dyed with yellow and red dyes having different length of alkyl substituents on monoazo chromophores. The dyeability was investigated at various conditions and fastness of the dyeings was examined. As the length of alkyl substituents increased, the dyeability toward UHMWPE fibers tends to be improved gradually up to propyl or butyl groups and then decreased for the longer alkyl substituents. Color strength of the fabrics was increased with the increase of dyeing temperature from 100 to 130 °C. From the dyeing rate, equilibrium dyeing at 130 °C was achieved at 2～3 h. The color fastnesses to washing, rubbing, and light of the dyeings were good showing higher than 4 ratings except for light fastness of the red dye. 相似文献
5.
A new series of anthraquinoid red dyes were synthesized with 1-amino-2-bromo-4-hydroxyanthraquinone and nalkylphenols to dye UHMWPE fibers with high light fastness. Their dyeability was examined depending on the length of alkyl chains. As the length of alkyl substituents increases, the dyeability toward UHMWPE fibers improves rapidly from methyl to ethyl substituents and maintains almost same level of color strength, and then decreases from heptyl to octyl groups. The color strength of dyeings increased dramatically with the increase of dyeing temperature from 100 °C to 130 °C. The maximum build-up was shown at around 5 % owf dye amount. From the dyeing rate, equilibrium dyeing was achieved at around 5 h at 130 °C. All kinds of fastnesses were good enough showing higher than ratings 4-5 to washing and rubbing for the longer alkyl substituents. Especially, much improvement was achieved in light fastness showing ratings 4, which was higher than ratings 2 of the previous study. 相似文献
6.
UHMWPE fibers were dyed with a series of anthrquinoid blue dyes having different length of alkyl substituents at general dyeing
condition. The dyeability was investigated at various conditions and fastness of the dyeings was examined. As the length of
alkyl substituents increased, the dyeability toward UHMWPE fibers tends to be improved gradually. Color strength of the fabrics
was increased with the increase of dyeing temperature from 100 to 130 °C. From the dyeing rate, equilibrium dyeing at 130°C
was achieved at 2–3 h. The tensile strength of UHMWPE fibers after dyeing at 130 °C for 1 h was maintained at a level of 95
% of untreated fiber. However, at prolonged dyeing time at 130 °C, the tensile strength was significantly decreased to a practically
unacceptable level. The color fastnesses to washing, rubbing and light of the dyeings were very good showing higher than 4
ratings. 相似文献
7.
Reversible and stable photochromic plastic lenses were obtained using photochromic dyes that were mixed during the casting process of the lens. Photochromic lenses with blue, red, yellow, and gray dyes as well as different concentrations of blue dye were prepared. The initial colors and fading speeds of the different dyes and different concentrations were examined by measuring the transmittances of the colored and bleached lenses. The initial color increased slightly with increasing dye concentration but the contamination was not as severe as the commercial photochromic lens. The fading speed was measured by changing the concentration of the dye and it was independent of the dye concentration. The relative transmittance was found to be more convenient for comparing the photochromic properties than the absolute transmittance because it could be used regardless of the type of color and dye concentration. 相似文献
8.
Vanessa Pasquet Nemeshwaree Behary Anne Perwuelz Jalal Isaad 《Fibers and Polymers》2013,14(7):1141-1147
Development of water-soluble dyes for the dyeing of different textile fabrics is essential for the textile industry due to ecological and economical reasons. In this study, a series of new azoic dyes were prepared by diazotization reaction between the phenyl boronic acid and different aniline derivatives, and their dyeing capacity in aqueous solution was evaluated. The synthesized boronic azo dyes present good water solubility and can dye polyamide (nylon), wool, silk, and cellulose acetate fabrics. The effect of factors such as concentration of dye, dyeing temperature, and pH on the level of color strength (K/S) was studied. The dyeing results showed that higher color strength K/S (about 16) and fastness properties (about 4/5) with boronic acid dyes were achieved at higher temperatures avoiding the use of surface agents, mordants, and other polluting chemical additives. 相似文献
9.
Reactive dye is a popular dye for dyeing cotton fiber due to its very good color fastness which is explained by the formation of covalent bond between dye and fiber. In this study, practicality of reuse of reactive dye by compensating for the hydrolyzed part of the dye solution is examined. A monofunctional dye (vinyl sulfone type) was used and it was found that dyeing cotton fiber with reused dyebath is possible. Since bifunctional dye can improve the chance of dye-fiber bond formation, vinyl sulfone based bifunctional reactive dyes were also selected in this study. Three types of bifunctional dyes were used and they basically share the same vinyl sulfone group; other reactive groups are monochlorotriazine, dichlorotriazine and vinyl sulfone. Such dyes were chosen in order to compare their respective efficiencies under the effect of one common reactive group. The aim of this study was to compare the effect of hydrolyzed and unhydrolyzed proportions of mono-and bifunctional reactive dyes on cotton fiber and study the possibility and efficiency of the two different reuse dyebath systems. 相似文献
10.
The dyeing and color fastness properties of three reactive-disperse dyes containing a sulphatoethylsulphone group on Nylon,
cotton and N/C mixture fabrics were examined. Reduction-clearing was more effective in removing the unfixed dyes than soaping
since the reactive-disperse dye became hydrophobic during dyeing process. Nylon was dyed well with three reactive-disperse
dyes at pH 5∼8 and difference in chemical structure between dyes did not affect the final color strength of the dyed Nylon
fiber, but their build-up properties on Nylon were not so good. The color strength of the dyed cotton was not as high as that
of Nylon. The color strength of cotton increased by lowering dyeing temperature when the reactive-disperse dyes having hydroxy
group were used. Nylon absorbed more dye molecules than cotton in simultaneous dyeing, the color difference between Nylon
and cotton could be reduced as the dyeing temperature decreased. N/C mixture fabric was dyed well at 60 °C with the reactive-disperse
dyes having hydroxyl group when applied at pH 7 and 60 °C, and their build-up properties were good. It was also found that
washing fastness and rubbing fastness of dyed Nylon, cotton and N/C fabrics with the reactive-disperse dyes were excellent,
while light fastness was moderate. 相似文献
11.
Jae-hong Choi Mi-hyeon Kim Joon-soo Park Jeong-min Jeon Dae-ok Kim A. D. Towns 《Fibers and Polymers》2007,8(1):37-42
In Part 1 of this study, the dyeability, color shade, wash, light fastness and compatibility of homogeneous disperse dyes
on PLA fabric and PET fabric were reported. The present paper (Part 2) focuses on the application of commercial disperse dyes
to PLA fabric. Specific areas of investigation are the coloration properties of dyes originally intended for the production
of high lightfastness polyester fabrics or for application to cellulose diacetate. The compatibility of the eight members
of the dye set was investigated. In terms of lightfastness, the ratings were higher than that of conventional disperse dyes.
In addition, the use of dye combinations to achieve synergistic uptake on PLA was explored leading to the pronounced synergism
with a mixture of CI Disperse Blue 374 and 284. 相似文献
12.
The nonionic surfactant properties of ethoxylated azo dyes, such as cloud point and surface tension have been investigated.
The synthesized ethoxylated azo dyes could dye polyester fabric without any special pre-treatment. When the average number
of ethylene oxide (EO) in the ethoxylated azo dye reached 6, its fixation could exceed 90% from the thermosol dyeing process.
The average degree of condensation of ethylene glycol in the chain was interrelated with the dyeing results and did not affect
on the maximum absorption wavelength (λmax) of the polyoxyethylene dye. When the average length of polyoxyethylene chain decreased,
the molecular weight of dyes became smaller and the fixation of dyes was improved. 相似文献
13.
Continuous photografting onto polypropylene fabrics in the absence of inert gases was carried out to improve hydrophilic property
of PP fabrics, which was padded with a formulated solution of 2-hydroxyethyl methacrylate(HEMA) and benzophenone as a monomer
and a photoinitiator, respectively. The grafting yield increased with increases in benzophenone concentration up to 30 % on
the weight of the monomer and UV energy up to of 38 J/cm2, while 30 % HEMA concentration was optimal for the grafting efficiency. The physicochemical properties of the grafted PP
fabrics were monitored by FT-IR, SEM, zeta potential, and dyeability to a cationic dye. The grafting increased O1s/C1s content and remarkably produced more negative zeta potentials compared with the pristine PP fabric. Also the grafted PP showed
the increased dyeability to cationic dyes with increasing graft yield resulting from the enhanced electrostatic interaction
between the dyes and negatively charged surface of the grafted PP fiber. In addition, improved hydrophilic property of grafted
PP fabrics was ascertained by more rapid water wetting time and higher water absorbency. 相似文献
14.
The effect of hydroxypropyl-β-cyclodextrin (HPβCD) in the dyeing of polyamide fabric was investigated under conditions that mimic industrial dyebaths where dye mixtures are used. The dyes used were Telon Red BN, Telon Yellow A-2R, and Telon Blue RR. The blue dye complexed with HPβCD whereas the other dyes did not do so under the conditions used. The dyeing results were compared with those obtained using a traditional retarding agent, Albegal B. The exhaustion dyeing data showed that HPβCD mainly affected the dyeing behavior of the blue dye that became encapsulated. In the case of the yellow and red dyes, changes in the overall kinetics of dyeing were observed, resulting in modified exhaustion profiles. In comparison, Albegal B retarded the blue dyeing process and increased the rate of exhaustion of the yellow dye while the exhaustion curve of red dye remained unchanged. The color uniformity of the dyed polyamide was improved when HPβCD was used. This resulted from the more controlled exhaustion rate during the critical phase of the dyeing process. 相似文献
15.
Three unreported cationic reactive dyes based on azobenzene were synthesized using a novel synthetic route. Synthesized dyestuffs containing three primary color dyes were characterized by FTIR, H-NMR, LC-MS, Element Analysis and UV-vis spectroscopic techniques. The absorption spectra of dyes were measured in three solvents with different polarities. The dyeing and color fastness properties of three cationic reactive dyes on wool, acrylic and wool/acrylic blend fabrics were determined. The optimum pH for wool and acrylic fabrics were 6 and 5, respectively. Effect of temperature, time on dyeing properties and color fastness properties on wool fabric showed the same tendency with acrylic fabric. The K/S value of wool fabric dyed with three dyes was similar to that of acrylic fabric when both fabrics were dyed simultaneously in the same dyebath using low dye concentration. Wool/acrylic blend fabric dyed with three cationic reactive dyes using onebath one-step method achieved good union dyeing property and excellent color fastness. 相似文献
16.
The dyeing and color fastness properties of two reactive-disperse dyes containing a sulfatoethylsulfone group on nylon, PET
and N/P mixture fabrics were examined. The rate of dyeing on nylon fabric was greatly dependent upon dye bath pH. The final
dye uptakes at all pH, however, were as high as 97 %. Color strength of the dyed nylon fabric linearly increased up to 0.5
%owf and then slowed down over 1 %owf dyeing. Washing and rubbing fastness of the dyed nylon fabric were excellent, but grade
of light fastness was moderate. Dyeability of the reactive-disperse dyes on PET fabric was not much affected by pH, and K/S
values of PET fabric dyed at pH 5–8 were lower than those of nylon fabric at all pH examined. Buildup and color fastnesses
properties on PET fabric showed the same tendency with nylon fabric. The rate of dyeing of the reactive-disperse dyes on nylon
fabric was faster than on PET fabric when both fabrics were dyed simultaneously in the same dye pot, resulting in higher color
strength of nylon than PET. The reactive-disperse dyes were found to be adequate to the one-bath, one-step dyeing of N/P mixture
fabric when applied at pH 5 and 120 °C. 相似文献
17.
In this work, various series of triarylmethane dyes containing one or more terminal methoxy substituent together with a variable
tertiary amino group have been synthesized. The effects of electron-donating and electron-withdrawing groups have been systematically
examined and electron absorption spectra of dyes determined. The absorption bands of the methoxy half-analogues of Malachite
Green and Brilliant Green show pronounced hypsochromic shifts together with reduction in intensity owing to the inherent electronic
asymmetry of the system. The corresponding dye bases are incompletely ionized in acid solution. Julolidine and Kairoline analogues
of these dyes produce further hypsochromic shifts of both visible absorption bands in accordance with enhanced conjugation
of the terminally bridged substituents. Crowding substituents at the central carbon atom in the series of methoxy half-analogues
produce hypsochromic shifts of the absorption bands owing to the inherent electronic asymmetry; bond order alteration throughout
the system ensures that crowding effects are minimized by rotation about essential single bonds. 相似文献
18.
Omar HH 《Pakistan journal of biological sciences: PJBS》2008,11(10):1310-1316
This study is to inspect how the variation of molecular structures and functional groups present in our models, monoazo dye (Tartrazine) and diazo dye (Ponceau), affects decolorization capabilities of green algae, cyanobacteria and diatoms. The results revealed that the removal of azo dyes was rapid at the initial period of study (3 days) and became slowly with the time (6 days). The maximum decolorization was observed at 5 ppm Tartrazine with S. bijugatus (68%) and N. muscourm after 6 days incubation. The reduction of color removal appears to be related to the molecular structure of the dyes and species of algae used. The culture of the diatom Nitzschia perminuta was completely died after 2 days of incubation. Azo reductase of algae, which is responsible for degradation of azo dyes into aromatic amine by breaking the azo linkage, was estimated. IR spectra represented a new peak at 3300 cm(-1) and a reduction in the azo band at 1642-1631 cm(-1). In order to investigate the sorption behavior of algae, Langmuir equilibrium model was tested. 相似文献
19.
Nylon 6 can be dyed with acid dyes and therefore it can also be stained by natural or artificial acid dyes existing in some foods and drinks when they are spilled on nylon fabrics. In this study, cationic dyeable polyamide (CD-PA6) was synthesized with sodium salt from 5-sulfoisophthalic acid (5-SSIPA) and easily cationic dyeable polyamide (ECD-PA6) was prepared with 5-SSIAP and polyethylene glycol (PEG). The influence of the chemical modification to CD-PA6 and ECD-PA6 on the resultant structures were characterized by wide angle X-ray diffraction (WAXD) and Fourier transform infrared spectroscopy (FT-IR), and their thermal properties were tested by differential scanning calorimetry (DSC) and thermogravimetric analysis (TG). The effects of varying 5-SSIPA content on the cationic dye uptake and acid dye resistance rate were also investigated, as well as mechanical properties of the modified PA6. Incorporating PEG not only destroyed the regularity of molecular chain arrangement and created more amorphous regions in the ECD-PA6 samples, but also changed the nylon 6 from α-form to γ-form. Results revealed a considerable improvement in cationic dye uptake and acid dye resistance rate in the modified fibers compared with unmodified fibers. 相似文献
20.
The synthesis of a series of phthalimide based azo disperse dyes and their spectral properties were investigated. The azo
dyes containing phthalimide and N-methyl phthalimide structure in diazo component were synthesized in order to compare their spectral properties. The synthesized
dyes developed the color of yellow to violet and the N-substitution of the phthalimide gave a bathochromic effect on the color change. Most of the synthesized dyes exhibit negative
solvatochromism so that the absorption band of dyes moves toward shorter wavelengths as the polarity of the solvent increases.
In the case of halochromic effect, the bathochromic shift decreased steadily with the general electron donating capacity of
the substituents in the coupling component, and became negative especially when more powerful electron donating groups are
present in the coupling components ring. 相似文献