NOPR Collection:

Adsorption of Congo Red on Viscose Fibres

2016-07-20T06:15:19Z

Title: Adsorption of Congo Red on Viscose Fibres Authors: Iyer, S R Sivaraja; Raghunath, R Abstract: The adsorption and rate of dyeing of the highly aggregate anionic dye Congo Red on viscose fibres in the presence of water structure breaking electrolyte cations parallel almost quantitatively those of a monodisperse anionic dye, giving more evidence for the existence of a complex equilibrium between mobile dye aggregates in solution mobile single dye ions and adsorbed single dye ions. Page(s): 49-50

Studies on Interaction of Non-Ionic Surfactants with Some Acid Dyes by Spectrophotometric Method

2016-07-20T06:14:20Z

Title: Studies on Interaction of Non-Ionic Surfactants with Some Acid Dyes by Spectrophotometric Method Authors: Karmakar, S R; Kulkarni, P P; Savsani, M P Abstract: The interaction of non-ionic surfactants in aqueous solutions containing some acid dyes has been studied spectro-photometrically. The spectral shift suggests that interaction decreases with increase in sulfonic acid group and increases with increase in the hydrophobic character of the dye molecule as well as with increase in the number of ethylene oxide unit of the surfactants, The results are explained in terms of definite binding of dye with surfactant, probably in the form of complexion. Page(s): 45-48

Role of Polyethylene Glycol-Fatty Acid Condensation Products in High-Temperature High-Pressure Dyeing of Polyester Fibres

2016-07-20T06:13:16Z

Title: Role of Polyethylene Glycol-Fatty Acid Condensation Products in High-Temperature High-Pressure Dyeing of Polyester Fibres Authors: Dhara, Debasis; Gulrajani, M L Abstract: The effect of four polyethylene glycol-fatty acid condensation products on the exhaustion of a disperse dye (C.I. Disperse Orange 13) in high-temperature high-pressure dyeing of polyester fibres was investigated. The experimental planning was done using a second order response surface design technique. The addition of polyethylene glycol-fatty acid condensation products affected dye exhaustion in two different ways depending upon dyeing temperature. At lower temperature (100°C) these products accelerated dye exhaustion by increasing dye solubility. At higher temperature (130°C), these products retarded dye exhaustion by further increasing dye solubility, which tends to retain a certain amount of dye in the dyebath. Page(s): 37-44

Low-Energy One-Step Fabric Preparation Using Peroxygen Booster

2016-07-20T06:12:31Z

Title: Low-Energy One-Step Fabric Preparation Using Peroxygen Booster Authors: Kaushik, R C D; Deshpande, S D; Srivastava, M L Abstract: A low-energy one-step process for fabric preparation has been developed using sodium persulphate (sodium peroxodisulphate) as peroxygen compound. The concentrations of hydrogen peroxide, sodium hydroxide, sodium silicate and sodium persulphate have been optimized to give acceptable whiteness, strength and wettability to treated fabrics. The fabric bleached by the proposed method has been found to be superior in whiteness and strength to the one semi-bleached and quite comparable to the one full-bleached by the conventional three-stage process. Page(s): 31-36