A new approach to improve dyeability of nylon 6 fibre using a subtilisin enzyme

Abstract

This study confirms the structural changes of nylon 6 fibres using protease by measuring the dyeability, hydrophilicity, chemical changes and fastness properties. For this purpose, nylon 6 fabrics were first treated with different concentrations of protease enzyme in aqueous solutions. The dyeing process was then carried out on the treated fabrics with disperse and acid dyes. Acid and disperse dyes showed higher exhaustion on the enzyme‐treated samples. The results of colour measurement in the CIELAB system showed that the darkness of the samples increased with an increase in the enzyme percentage in the solution. The results of moisture regain showed that treatment of nylon fabrics with a proteolytic enzyme caused an increase in moisture absorbency. The wash and light fastness properties of samples were measured according to ISO 105‐C05 and daylight ISO 105‐B01 and are discussed.

Clay nanoadsorbent as an environmentally friendly substitute for mordants in the natural dyeing of carpet piles

“…The peaks at 2929, 1385, 1236, and 617 cm −1 are related to weak C–H stretching and bending vibrations of aliphatic chains in the wool. The appearance of other weak bands at 3850 and 3739 cm −1 is attributed to O–H stretching vibrations in free primary and secondary alcohols .…”

Preparation and adsorption behavior of diethylenetriamine/polyacrylonitrile composite nanofibers for a direct dye removal

“…The PAN spectrum (curve a) exhibited the absorption peaks of stretching vibrations at 3446 cm -1 (OH), 2242 cm -1 (C≡N) [15], 1737 cm -1 (C=O) [9,16], 2966 cm -1 (CH stretching in CH, CH 2 , and CH 3 groups) [16,17] and 1200-300 cm -1 (C-O) [18][19][20], which suggests that PAN is a copolymer containing both of acrylonitrile and vinylacetate polymers. In the spectra of the composite nanofibers mats (curves b-d), the band at 3436 cm -1 , corresponding to the overlapping of the stretching vibration bands of OH and NH groups is intensified and shifted to the lower wavenumbers compared to that at pure PAN.…”

Effect of Colloidal Dispersion of Clay on Some Properties of Wool Fiber

“…[1,2] Researchers utilized various methods for modifying the surface of wool and other textile fibers using various chemical and physical modification methods including, treatment with various enzymes and reagents, [3][4][5][6][7][8][9][10][11] grafting of different monomers, [12] application of supercritical carbon dioxide in scouring and dyeing, [13] microencapsulation techniques, [14] corona discharge, [15] gamma and ultraviolet irradiations, [16,17] ultrasound vibration, [18,19] and plasma functionalization, [20][21][22] However, some of these methods often damage other excellent mechanical and bulk properties of natural and synthetic fibers while they are time and energy consuming methods which in turn increase the manufacturing costs. [23] Some others have difficulties in the textile industry as development of scale-up strategies from laboratory to the industrial scale.…”