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2,293 Newest Publications about the topic dyes

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A study on the effect of bulk water content and drying temperature on the colour of dyed cotton fabrics

01-Jun-2011 | Senthilkumar, Muthusamy; Selvakumar, Natarajan, Coloration Technology, 2011

In the present study, the effect of various levels of bulk and free water content and its distribution on the colour of cotton fabrics dyed with direct dyes and their combinations were analysed. Twill and plain structures with two different parameters of fabric construction were chosen. The dyed ...

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Decolorisation of reactive dye wastewater and the effect of surfactants using laccase

01-Jun-2011 | Hou, Aiqin; Zhang, Xufang, Coloration Technology, 2011

Laccase (benzenediol, oxidoreducase; Enzyme Commission Number) is a multi‐copper oxidase from biomass. Laccase enzyme recycling on molecular oxygen as an electron acceptor can be applied for the decolorisation of synthetic dyes. The decolorisation of 49 commercial reactive dyes using laccase was ...

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Review Article: Effect of cationic charge and hydrophobic index of cellulose‐based polymers on the semipermanent dyestuff process for hair

01-Jun-2011 | Ballarin, B.; Galli, S.; Mogavero, F.; Morigi, M., International Journal of Cosmetic Science, 2011

Synopsis In this work, the effects of a new class of polymers generally used in hair and skin cleansing products, the SoftCAT (SofCAT SL and SoftCAT SX), on the dye uptake on the hair fibre and the fading effects has been studied. These polymers, based on quaternary ammonium salts of ...

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Experimental and ab initio DFT calculated Raman spectrum of Sudan I, a red dye

01-Jun-2011 | Kunov‐Kruse, Andreas J.; Kristensen, Steffen B.; Liu, Chuan; Berg, Rolf W., Journal of Raman Spectroscopy, 2011

Abstract The red dye Sudan I was investigated by Raman spectroscopy using different excitation wavelengths (1064, 532 and 244 nm). A calculation of the Raman spectrum based on quantum mechanical ab initio density functional theory (DFT) was made using the RB3LYP method with the 3‐21G and 6‐311 ...

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Aqueous polymeric sensors based on temperature-induced polymer phase transitions and solvatochromic dyes

31-May-2011 | Christian Pietsch; Ulrich S. Schubert; Richard Hoogenboom, Chemical Communication, 2011

This feature article provides, for the first time, an overview of the research that guided the way from fundamental studies of the thermo-responsive phase separation of aqueous polymer solutions to polymeric sensor systems. The incorporation of solvatochromic dyes into thermoresponsive polymers ...

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Multipolar symmetric squaraines with large two-photon absorption cross-sections in the NIR region

31-May-2011 | E. Collini; S. Carlotto; C. Ferrante; R. Bozio; A. Polimeno; J. Bloino; V. Barone; E. Ronchi; L. Beverina; G. A. Pagani, Physical Chemistry Chemical Physics, 2011

The two-photon absorption (TPA) properties of two extended symmetric squaraine dyes are thoroughly characterized from the experimental and quantum-chemical point of view. The two molecules are specially engineered to have a multipolar structure with increasing complexity, D-π-A-π-D and ...

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Aqueous polymeric sensors based on temperature-induced polymer phase transitions and solvatochromic dyes

31-May-2011 | Christian Pietsch; Ulrich S. Schubert; Richard Hoogenboom, Chemical Communication, 2011

This feature article provides, for the first time, an overview of the research that guided the way from fundamental studies of the thermo-responsive phase separation of aqueous polymer solutions to polymeric sensor systems. The incorporation of solvatochromic dyes into thermoresponsive polymers ...

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Analysis of natural red dyes (cochineal) in textiles of historical importance using HPLC and multivariate data analysis

30-May-2011 | Ana Serrano, Micaela M. Sousa, Jessica Hallett, João A. Lopes, M. Conceição Oliveira, Analytical and Bioanalytical Chemistry, 2011

A new analytical approach based on high-performance liquid chromatography with diode array detector (HPLC-DAD) and multivariate data analysis was applied and assessed for analyzing the red dye extracted from cochineal insects, used in precious historical textiles. The most widely used method of ...

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Phenoxazine Dyes for Dye‐Sensitized Solar Cells: Relationship Between Molecular Structure and Electron Lifetime

27-May-2011 | Karl Martin Karlsson; Xiao Jiang; Susanna K Eriksson; Erik Gabrielsson; Håkan Rensmo; Anders Hagfeldt; Licheng Sun, Chemistry - A European Journal, 2011

Abstract A series of metal‐free organic dyes with a core phenoxazine chromophore have been synthesized and tested as sensitizers in dye‐sensitized solar cells. Overall conversion efficiencies of 6.03–7.40 % were reached under standard AM 1.5G illumination at a light intensity of 100 mW cm−2. A ...

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Increasing the Isomerisation Kinetics of Azo Dyes by Chemical Bonding to Liquid‐Crystalline Polymers

27-May-2011 | Garcia‐Amorós, Jaume; Finkelmann, Heino; Velasco, Dolores, Chemistry - A European Journal, 2011

Abstract It is well known that the proper substitution of the azobenzene core allows tuning the thermal cis‐to‐trans isomerisation kinetics of azo dyes. The thermal isomerisation process of nitro‐substituted azobenzenes is accelerated up to 13 times with respect to that in the common isotropic ...

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