neutral dyeing of polyacrylamide -hydrazine treated cotton

a novel technique of cotton dyeing with reactive dyes at

A novel technique of cotton dyeing with reactive dyes at

It was observed that the simultaneous polyacrylamide-epichlorohydrin treatment and dyeing enhances the dyeabilily of cotton at neutral pH with a series of commercial reactive dyes. The probable mechanism fo r dye fixation on polymer treated fabric has been proposed. Keywords: Cotton, Dyeing, Epichlorohydrin, Polyacrylamide, Reactive dye

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the salt-free dyeing on cotton: an approach to effluent free

The Salt-Free Dyeing on Cotton: An Approach to Effluent Free

polyacrylamide was discussed. When the fabric is treated with polyacrylamide (chitosan), the primary hydroxyl groups of cellulose is (partially) modified into amide groups, which intern leads the cellulose to act like as wool fibre and hence reactive dyes can be dyed on cotton at neutral PH in the absence of electrolyte and alkali.

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the salt-free dyeing on cotton: an approach to effluent free

The Salt-Free Dyeing on Cotton: An Approach to Effluent Free

Pretreatment of cotton with polyacrylamide enhances the possibility of dyeing cotton at neutral pH. Such pretreatment, as applied through pad – dry – cure process, brings about some chemical changes in the treated fabric. Fastness properties are adequate and quite comparable with conventionally dyed samples.

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effects of concentration of polyacrylamide on salt and alkali

Effects of Concentration of Polyacrylamide on Salt and Alkali

Polyacrylamide is a polymer formed from acrylamide subunits. When the cotton fabric is treated with polyacrylamide, the primary hydroxyl groups (-OH) of cellulose is partially modified into amide groups (- CONH2), hence reactive dyes can be dyed on cotton at neutral pH in the absence of electrolyte and alkali. The dyeing method with

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(pdf) treatment of cotton fabric with cationic polyacrylamide

(PDF) Treatment of Cotton Fabric with Cationic Polyacrylamide

Cotton fabric is pretreated with polyacrylamide and dyed with 0.5%, 1%, 2% and 3% basic dye in the Wet Processing Laboratory of Southeast University, Dhaka, Bangladesh on 3 December 2015.

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research and study of salt and salt free dyeing on cotton fabric

RESEARCH AND STUDY OF SALT AND SALT FREE DYEING ON COTTON FABRIC

Method of dyeing of cotton with reactive dyes, alkali PH is should maintain in the dye bath. This method requires more electrolytes for exhaustion and alkali for fixation. In this paper the fibre modification technique based on polyacrylamide was discussed. When the fabric is treated with polyacrylamide (chitosan), the primary hydroxyl groups

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salt and alkali free reactive dyeing on cotton fabric

Salt and Alkali Free Reactive Dyeing on Cotton Fabric

The dyeing of cotton with reactive dyes using polyacrylamide in the dye bath improves the dye ability of cellulosic fabrics with reactive dyes and reducing effluent discharge. When dyeing the modified substrates, reactive dyes can be much more efficiently exhausted and fixed onto cellulosic fabrics under neutral conditions in the absence of salt.

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synthesis and thermosensitive behavior of polyacrylamide

Synthesis and Thermosensitive Behavior of Polyacrylamide

The surface of the untreated cotton fabrics (Figure 5a,b) appears smoother versus the treated one (Figure 5c,d). This shows that there is a thin polymeric film coating on the surface of the treated cotton fabrics. The coating appeared fairly uniform throughout the fabrics.

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nopr: a novel technique of cotton dyeing with reactive dyes

NOPR: A novel technique of cotton dyeing with reactive dyes

Cotton fabric was treated with optimum concentrations of polyacryl amide and epichlorohydrin, dried, cured and then studied for morphological changes occurred due to the treatment. The modified fabric was then dyed with selected commercial reactive dyes under neutral p H in the absence of electrolyte by different dyeing sequences.

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application of tertiary amine cationic polyacrylamide with

Application of Tertiary Amine Cationic Polyacrylamide with

Keywords tertiary amine cationic polyacrylamide, reactive dye, cotton fabric, salt-free dyeing 1 INTRODUCTION Reactive dyes are very popular owing to their wide range of hues, brilliance and high wet fastness [1]. The demand for reactive dyes increases greatly with the increasing demand for cotton fabrics year by year.

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synthesis and thermosensitive behavior of polyacrylamide

Synthesis and Thermosensitive Behavior of Polyacrylamide

The surface of the untreated cotton fabrics (Figure 5a,b) appears smoother versus the treated one (Figure 5c,d). This shows that there is a thin polymeric film coating on the surface of the treated cotton fabrics. The coating appeared fairly uniform throughout the fabrics.

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covalent fixation of reactive dyes on cotton under neutral

Covalent fixation of reactive dyes on cotton under neutral

These dyes are particularly suitable for neutral, high temperature exhaust dyeing, and for one-bath dyeing of polyester/cotton blended fabrics [50]. This continues to be an active area for

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cationic pretreatment for reactive dyeing of cotton and its

Cationic Pretreatment for Reactive Dyeing of Cotton and its

The dyeing of treated cotton exhibits comparable color yield and high wash fastness for selected reactive dyes. Performance of polyimine pretreated cotton was compared with commercial cationic

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effect of chemical modification with 4-vinylpyridine on

Effect of chemical modification with 4-vinylpyridine on

Cotton fabrics were pre-treated with 4-vinylpyridine before dyeing to increase dye uptake. Various treatments for the application of monomers to fabrics were tried in different combinations and after dyeing the best result was obtained with alkali impregnation and monomer exhaustion. After decisions had been made on the processes to be applied before dyeing, different amounts of monomer

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durable antipilling modification of cotton fabric with

Durable Antipilling Modification of Cotton Fabric with

Cotton fabric, a natural cellulose material, is widely used in the textile industry for its excellent properties. However, its application in some fields are seriously restricted because of its poor antipilling behavior. In this study, cotton fabrics were modified with 2,4,6-trichloropyrimidine (TLP), 2,4-dichloro-5-methoxypyrimidine (DMP), and 2-amino-4,6-dichloropyridine (ADP). The surface

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us patent application for dyeing of textiles patent

US Patent Application for DYEING OF TEXTILES Patent

The treated fabrics were dyed with a range of reactive dyes and the fabrics washed. The cotton and velour samples were washed using wash routine iii (see methods section above) but for 15 to 20 minutes, and the cotton/wool blend using wash routine iv (see methods section above) but for 15 to 20 minutes.

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synthesis and thermosensitive behavior of polyacrylamide

Synthesis and Thermosensitive Behavior of Polyacrylamide

The surface of the untreated cotton fabrics (Figure 5a,b) appears smoother versus the treated one (Figure 5c,d). This shows that there is a thin polymeric film coating on the surface of the treated cotton fabrics. The coating appeared fairly uniform throughout the fabrics.

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de4101968a1 - continuous textile dyeing - with dye bath contg

DE4101968A1 - Continuous textile dyeing - with dye bath contg

The continuous dyeing of textiles based on cellulose and/or polyester fibre comprises pad-dyeing with aq. baths contg. vat dyes and/or dispersion dyes and copolymers of (meth)acrylic acid and (meth)acrylamide (I) as antimigration agents, followed by drying and fixing the dye.

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durable antipilling modification of cotton fabric with

Durable Antipilling Modification of Cotton Fabric with

Cotton fabric, a natural cellulose material, is widely used in the textile industry for its excellent properties. However, its application in some fields are seriously restricted because of its poor antipilling behavior. In this study, cotton fabrics were modified with 2,4,6-trichloropyrimidine (TLP), 2,4-dichloro-5-methoxypyrimidine (DMP), and 2-amino-4,6-dichloropyridine (ADP). The surface

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us patent application for dyeing of textiles patent

US Patent Application for DYEING OF TEXTILES Patent

The treated fabrics were dyed with a range of reactive dyes and the fabrics washed. The cotton and velour samples were washed using wash routine iii (see methods section above) but for 15 to 20 minutes, and the cotton/wool blend using wash routine iv (see methods section above) but for 15 to 20 minutes.

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ca1319471c - process for alkali-free dyeing and printing

CA1319471C - Process for alkali-free dyeing and printing

Abstract of the disclosure Process for alkali-free dyeing and printing with reactive dyes. Beforehand, the textile material is treated with a wetting agent and a reaction product of polyethylene-imine and a bifunctional alkylating agent.

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efficiency of the coagulation-flocculation method for the

Efficiency of the Coagulation-Flocculation Method for the

widespread use in dyeing cotton and polyester (Kim et al. 2004). Nonionic disperse dyes have extremely low water solubility; therefore, this class of dyes can be removed effectively by the coagulation-flocculation method (Kuo 1992). Reactive dyes hydrolyze easily, resulting in high portions that are unfixed or are in a hydrolyzed form.

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solution of printing and dyeing wastewater decolorizing agent

Solution of printing and dyeing wastewater decolorizing agent

Printing and dyeing wastewater refers to the waste water discharged from cotton, wool and chemical fiber during pretreatment, dyeing, printing and finishing. The composition of the printing and dyeing wastewater is complex, mainly using aromatic and heterocyclic compounds as the parent, and with the chromogenic groups (such as - N N - N O) and

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cationisation of cotton and study of kinetics and

Cationisation Of Cotton And Study Of Kinetics And

Cotton cellulose in loose fibres, yarn or fabricsis usually dyed with direct, reactive or vat dyes owing to absence of specific sites for dye attachment. Presence of minute negative charges on the surface of cotton cellulose makes its dyeing difficultGileset al., (1963). Even with direct or reactive dyes, dyeing of cotton exhibits low exhaustion.

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