Part III.—Manufacturing processes. On the theory of the dyeing process. The influence of acid-dyes on animal fibres

1933 ◽  
Vol 29 (140) ◽  
pp. 327-345 ◽  
Author(s):  
Egon Elöd
Keyword(s):  
Manufacturing Processes ◽  
Acid Dyes ◽  
Dyeing Process

Study on the Dyeing Behavior of Wool Fiber Treated with Nano-SiO2/Ag Antibacterial Agent

2011 ◽  
Vol 332-334 ◽  
pp. 27-30 ◽  
Author(s):  
Mei Niu ◽  
Zi Lu Wu ◽  
Jin Ming Dai ◽  
Wen Sheng Hou ◽  
Sheng Shi ◽  
...  
Keyword(s):  
Low Temperature ◽  
Antibacterial Agent ◽  
Important Influence ◽  
Wool Fiber ◽  
Experimental Results ◽  
Ultrasonic Frequency ◽  
Acid Dyes ◽  
Nano Sio2 ◽  
Dyeing Process ◽  
The Impact

Wool fiber was firstly pretreated by nano-SiO2/Ag antibacterial agent, and then dyed with an acid dyes at low temperature by ultrasonic dyeing. Many factors had an important influence on the dye ability and the antibacterial behavior during the dyeing process of antibacterial wool fiber. The experimental results indicate that the dye-takeup rates of antibacterial wool fiber were enhanced with the increase of the concentration of nano-SiO2/Ag, the dyeing temperature, the dyeing time and the ultrasonic frequency (less than 60Hz). However, the antibacterial ratios of wool fiber were declined in the impact of these factors other than the concentration of antibacterial agent.

Surface Modification on Polyamide 6.6 with Double Barrier Discharge (DBD) Plasma to Optimise Dyeing Process by Direct Dyes

2010 ◽  
Vol 636-637 ◽  
pp. 846-852 ◽  
Author(s):  
Fernando R. Oliveira ◽  
A.P. Souto ◽  
Noemi Carneiro ◽  
J.H.O. Nascimento
Keyword(s):  
Photoelectron Spectroscopy ◽  
Barrier Discharge ◽  
Microstructural Analysis ◽  
Atmospheric Conditions ◽  
Acid Dyes ◽  
Direct Dyes ◽  
Dbd Plasma ◽  
Double Barrier ◽  
Dyeing Process ◽  
Polyamide 6.6

Dyeing of polyamide fibers is normally made with acid dyes, however, it is somewhat difficult to achieve uniformity and control of pH and temperature must be carefully made. The possibility to dye polyamide 6.6 in a larger gamut of colours with good properties may be achieved using other classes of dyes after plasmatic modifications in textile substrates. Polyamide 6.6 fabrics were treated with Double Barrier Discharge (DBD) plasma obtained at atmospheric conditions in a semi-industrial machine and very positive results were obtained when dyeing is made with direct dyes. Surface modifications were evaluated, namely, roughness in terms of Atomic Force Microscopy, changes in chemical composition by X-Ray Photoelectron Spectroscopy (XPS) and microstructural analysis by SEM. In order to optimize dyeing process, different dye concentrations, pH and temperatures were attempted on dyeing with DBD treated fabrics. Important parameters were studied such as exhaustion, colour strength (K/S) and washing fastness. Chemical and physical effects of plasmatic discharge contribute to excellent results obtained in yield, exhaustion and fastness of dyeing of polyamide with direct dyes demonstrating extensive improvement of dye exhaustion from baths, easily achieving 100% in shorter dyeing times. These results mean less dyes in effluents and less time for dyeing processes. The cleanness of the processes and lower cost of direct dyeing are additional advantages when compared to difficulties in acidic dyeing of polyamide.

scholarly journals Influence of protease on dyeing of wool with acid dyes

2011 ◽  
Vol 9 (1) ◽  
pp. 157-164 ◽  
Author(s):  
Monica Periolatto ◽  
Franco Ferrero ◽  
Mirco Giansetti ◽  
Raffaella Mossotti ◽  
Riccardo Innocenti
Keyword(s):  
Acid Dyes ◽  
Enzymatic Pretreatment ◽  
Fiber Damage ◽  
Dyeing Process ◽  
Finishing Process ◽  
Sds Page ◽  
Research Goal ◽  
Wool Dyeing ◽  
Leveling Agent ◽  
Section Analysis

AbstractThe application of enzymes in the wool dyeing process is an important research goal in order to reduce the environmental impact and costs of this finishing process. The work has focused on the possibility of reducing the temperature of conventional dyeing, using an enzymatic pretreatment with a neutral protease to improve the diffusion of the dye into the fibers. After the identification of the optimal dyeing process, the study goes on transferring the method to an industrial application. For this reason the influence of a leveling agent added to the dyeing bath was considered and further tests with an industrial dyeing recipe were performed. In order to evaluate possible fiber damage, samples treated with enzyme were observed by scanning electron microscopy (SEM) and analyzed by gel electrophoresis (SDS-PAGE). Moreover, the variation of tensile strength and elongation of dyed samples were determined. In addition, color fastness to domestic laundering, perspiration and rubbing were carried out. Finally, color measurements and fiber section analysis were performed. The results show the possibility, thanks to the pretreatment with the investigated enzyme, to obtain a homogeneous and solid dyeing on fibers maintaining good mechanical properties, already working at 85°C instead of 98°C currently used in industry.

Large Unilamellar Vesicle Liposomes for Wool Dyeing: Stability of Dye-Liposome Systems and Their Application on Untreated Wool

1992 ◽  
Vol 62 (7) ◽  
pp. 406-413 ◽  
Author(s):  
A. de la Maza ◽  
J. L. Parra ◽  
P. Bosch ◽  
L. Coderch
Keyword(s):  
Dye Adsorption ◽  
Acid Dyes ◽  
Large Unilamellar Vesicle ◽  
Dyeing Process ◽  
Wool Fibers ◽  
Physicochemical Stability ◽  
The Mean ◽  
Wool Dyeing ◽  
Hydrolysis Of ◽  
Acid Blue

Studies are described involving the use of large unilamellar liposomes (LUV) as carriers of dyes to untreated wool. To this end, we investigated liposomes made with egg phosphatidylcholine and containing the commercial acid dyes Polar red B (Ciba-Geigy), CI acid red 249, or Polar blue 6B, CI acid blue 83. We first studied the physicochemical stability of liposomes by measuring the mean particle size distribution of phospholipid vesicles after preparation and during the dyeing process, and we also investigated the possible hydrolysis of phospholipid molecules, studying the alteration of fatty acids built up on the liposomic structures. We then investigated the kinetic aspects of dye adsorption and bonding on untreated wool samples by means of LUV liposomes at different lipid concentrations. This process leads to an inhibition of dye exhaustion in untreated wool fibers, improving the bonding of these acid dyes to the keratinic structure.

scholarly journals The influence of surfactant structure on the dyeing of polyamide knitting with acid dyes

2018 ◽  
Vol 24 (2) ◽  
pp. 117-125
Author(s):  
Nebojsa Ristic ◽  
Ivica Dodic ◽  
Ivanka Ristic
Keyword(s):  
Nonionic Surfactants ◽  
Significant Contribution ◽  
Polyamide 6 ◽  
Acid Dyes ◽  
Kinetic And Thermodynamic Parameters ◽  
Slowing Down ◽  
Dyeing Process ◽  
High Utilization ◽  
Kinetics Of ◽  
Dyeing Kinetics

The influence of nonionic and anionic surfactants on the dyeing kinetics of polyamide 6 knitting was studied in this work. The influence of surfactants on the dyeing process is presented by determining the kinetic and thermodynamic parameters of dyeing. Nonionic surfactants create unstable polydisperse associates which reduce the concentration of individual ionic forms of dyes in the solution, slowing down the dyeing process, with the dyeing having higher leveling. Interactions were confirmed by measuring the cloud point of nonionic surfactants and they are stronger with more hydrophobic dye and are related to the results of the studied dyeing kinetics. The anionic surfactant as a retarding agent, which behaves like a colorless dye in the studied dyeing system, makes a significant contribution even at concentrations of 0.5 and 1 g/dm3, indicating the conclusion that the surfactant concentration in a dyeing solution should be optimized by previous trials, so that the process would be efficient with high utilization of dye.

scholarly journals Environmentally Friendly Techniques for Wool Dyeing Process

2015 ◽  
Vol 23 (2) ◽  
pp. 65-76 ◽  
Author(s):  
Simona Antighin ◽  
Laura Chirila ◽  
Alina Popescu
Keyword(s):  
Heavy Metal Concentration ◽  
Organic Content ◽  
Point Of View ◽  
Wool Fiber ◽  
Acid Dyes ◽  
Dyeing Process ◽  
Zinc Salts ◽  
Iron Nickel ◽  
Wool Dyeing

Abstract The aim of this research was to evaluate the influence of dyeing process on the quality of surface waters contaminated with heavy metals and organic compounds, resulted after the wool dyeing process. In order to mark out this aspects an environment friendly method was proposed which involves dyeing wool fiber with new complex combinations derived from a new acid dyes which were complexed, using copper, iron, nickel and zinc salts at 2:1 combination ratio. In order to point out the environmental point of view of wastewaters an experimental protocol was tested by dyeing wool fiber at different pH. Evaluation of complexed combinations impact on the environment involve the following indicators: consumption degree of dyeing solution from the process bath, treatment degree related to the organic content expressed by COD indicator and treatment degree related to the heavy metal concentration respectively.

scholarly journals Multifunction Finishing of Cellulose Based Fabrics via 3-Chloro-2-Hydroxypropyl Trimethyl Ammonium Chloride (Quat-188) and Silver Nanoparticles (AgNPs) to Improve its Dyeability and Antibacterial

2020 ◽  
Vol 11 (4) ◽  
pp. 11666-11678
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Antibacterial Properties ◽  
Cotton Fabrics ◽  
Diffusion Method ◽  
Acid Dyes ◽  
Color Strength ◽  
Disk Diffusion Method ◽  
Dyeing Process ◽  
Colour Strength

The main goal of this study is to modify cotton as cellulose-based fabrics through cationization to improve its dyeing with acid dyes and its antibacterial. Quat-188 was applied to cotton to prepare cationized cotton, overcoming the negative charges between cotton and acid dyes during the dyeing process without using any electrolyte via the pad-dry-cure method. Then the cationized cotton fabrics were treated with the prepared silver nanoparticles to improve their antibacterial properties. The untreated and treated cotton fabrics were dyed with two acid dyes Acid Brilliant Blue PB 100% (acid blue 25; AB25) and Acid Metanil Yellow MT 100% (acid yellow 36) at concentrations of 2%, 4%, and 6% of by exhaust method. Colour strength, color, and washing fastness of untreated and treated cotton fabrics were studied. Antibacterial properties of fabrics were also evaluated against S. aureus and E. coli by using the disk diffusion method. Dyeing properties showed that the treated cotton fabrics significantly improved color strength and fastness properties (light, washing, perspiration, and rubbing). Also, the antibacterial properties of treated cotton fabrics showed antibacterial activity towards tested bacteria. This study reveals that modified cotton fabrics via cationization with Quat-188 and AgNPs have multifunctional properties from their ability for acid dyes and their higher antibacterial activity towards Gram-positive and Gram-negative bacteria that is can be used in many applications.

Control of a Batch Dyeing Process with Three Acid Dyes

2001 ◽  
Vol 71 (1) ◽  
pp. 57-62 ◽  
Author(s):  
Warren J. Jasper ◽  
Ritcha P. Joshi
Keyword(s):  
Acid Dyes ◽  
Dyeing Process

Single bath dyeing of modified nylon/cotton blended fabrics using direct/acid dyes

2020 ◽  
Vol 49 (3) ◽  
pp. 165-170
Author(s):  
Kashif Iqbal ◽  
Amjed Javid ◽  
Abdur Rehman ◽  
Aisha Rehman ◽  
Munir Ashraf ◽  
...  
Keyword(s):  
Design Methodology ◽  
Positive Charge ◽  
Dye Uptake ◽  
Acid Dyes ◽  
Content Type ◽  
Chemically Modified ◽  
Dyeing Process ◽  
Color Yield ◽  
Single Bath ◽  
The Impact

Purpose This study aims to deal with the dyeing of nylon-/cotton-blended fabric in one bath using direct and acid dyes. Design/methodology/approach The cellulose in cotton/nylon-blended fabric was chemically modified using 3-chloro-2-hydroxypropyl tri-methyl ammonium chloride (CHPTAC) as cationizing agent to impart positive charge on the cellulose. The modified and unmodified blended fabrics were dyed in a single bath with direct and acid dyes under various concentrations of 0.5, 1, 2, 4 and 6 per cent on the weight of fabric by exhaust method. The dyeing of modified and unmodified fabrics was characterized through the properties such as K/S and colorfastness to washing, rubbing and light. Findings The modified fabric exhibited higher color yield, comparable rubbing fastness and good washing fastness. Originality/value The dye uptake was maximum in a single-bath dyeing process of nylon-/cotton-blended fabrics without electrolyte addition, which minimizes the impact of dyes on environment.

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