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RISS 인기검색어
- 검색키워드
- 주제어 : Cationic reactive dyes (검색결과 6 건)
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Meihui Wang,Chong Guo,Chunhong Li,Tao Zhao 한국섬유공학회 2020 Fibers and polymers Vol.21 No.12
In this work, four novel, high fixation reactive dyes containing cationic groups were synthesized using maminophenyltrimethylammoniumsalt or 4-(ethylsulfurate sulfonyl) aniline as the diazo component, 3-(N,N-diethylamino)acetanilide or 3’-aminoacetanilide as the coupling component and m-aminophenyltrimethylammonium salt or N-(2-aminoethyl)pyridinium chloride as the cationic group. The synthesized dyes containing multiple cationic groups were characterized by FTIRand 1H-NMR spectroscopy. The spectral properties were measured by UV-Vis absorption spectroscopy. Compared withconventional reactive dyes containing cationic groups, the synthesized dyes exhibited good water solubility uponintroduction of a quaternary ammonium into the chromophore. The structural design of synthetic azo dyes allows enhancedthe water solubility due to the introduction of a cationic group. The dyeing properties of the synthesized dyes to cotton fabricwere explored at various temperatures and salt and alkaline concentrations. The results showed that the synthesized dyespossessed good dyeing properties with nearly 80% fixation and good color fastness on cotton (3-5) in the absence of salt. Thesuccess of the salt-free dyeing of cotton fabric with these dyes is an excellent example of environmentally friendly cottondyeing. This study provides an important platform for the design of novel reactive dyes for cotton dyeing to reduce effluentpollution.
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One-Bath Union Dyeing of Wool/Acrylic Blend Fabric with Cationic Reactive Dyes Based on Azobenzene
Hang Xiao,Tao Zhao 한국섬유공학회 2018 Fibers and polymers Vol.19 No.2
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 blendfabrics 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.
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Salt Free Reactive Dyeing of Cationized Cotton
Montazer, M.,Malek, R.M.A.,Rahimi, A. The Korean Fiber Society 2007 Fibers and polymers Vol.8 No.6
In this study 3-chloro-2-hydroxypropyltrimethylammonium chloride was used as a cationic agent to cationize cotton fabric by a pad-batch process. The cationized cotton samples were dyed with different reactive dyes containing various reactive groups. The dyeability of the cationized cotton samples with reactive dyes without salt was significantly improved due to an increase in the ionic attraction between the dye and cationized cotton. The results showed that the wash and dry rubbing fastness of the cationized cotton dyed with different reactive dyes are similar to those of the untreated cotton. However, the light fastness of some of the cationized fabric samples was improved.
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Gehan M. Nabil,Mohamed E. Mahmoud,Nabila M. El-Mallah 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.3
Activated carbon-immobilized-cationic surfactant (AC-CS) was designed to enhance the decolorizationbehavior of reactive black 5 (RB5), as an anionic dye, from aqueous and industrial wastewater samples inpresence of various controlling experimental conditions. Experimental data indicated that the dyeadsorption capacity by (AC-CS) was higher in strongly acidic and basic solutions. An anion exchange andion–ion interaction mechanisms were proposed in the acidic solution, while only anion exchangemechanism was suggested in the basic aqueous solution. The adsorption behavior and thermodynamicparameters were also evaluated. Treatments of textile industrial wastewater and real water samples weresuccessfully established (95.23–100.00%).
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A. Tawfik,D.F. Zaki,M.K. Zahran 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4
Decolourization of reactive dyes wastewater supplemented with 1 mg/l cationic polymer (Organo Pol.) in a down flow hanging sponge (DHS) system was investigated at different HRTs and OLRs. The results obtained revealed that, increasing the HRT from 1.7 to 5 h, significantly increased the removal efficiencies of color and COD i.e. at a HRT of 5 h, and OLR not exceeding 2.8 g COD/l d, the reactor achieved removal efficiencies of 66.5 ± 7.07% for COD t and 90.12 ± 3.13% for color. However, at longer HRT of 6.0 h, the decolorization process was substantially dropped, due to high salinity content in the influent.
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Synthesis and Application of Cationic Waterborne Polyurethane as Fixing Agent for Cotton Fabric
Zhiwei Xu,Xiangdong Zhou 한국고분자학회 2021 폴리머 Vol.45 No.1
The traditional reactive dyeing of cotton has the disadvantage of poor fastness. In order to improve the fastness, a novel environment-friendly cationic waterborne polyurethane (CWPU) was successfully synthesized via step-by-step polymerization. The CWPU was prepared from isophorone diisocyanate (IPDI), polypropylene glycol (PPG-1000), methyl ethyl ketone oxime and hydrophilic monomer (EGDEA). The chemical structure of CWPU was characterized by Fourier transform infrared spectroscopy. Effects of n (IPDI/PPG-1000), EGDEA dosage, and the neutralizational degree on the properties of the waterborne polyurethane emulsion and the fastness of the treated dyed cotton fabrics were investigated. Particle size and zeta potential were tested to evaluate the emulsion stability. Scanning electron microscope showed that CWPU had been successfully finished on the fabric. Compared with the untreated cotton fabric, the dry and wet rubbing fastness of the treated cotton fabric dyed with reactive dyes increase 0~0.5 and 0.5~1 level, respectively, and the wash fastness increases 0.5~1 level.
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