Eco-friendly cationic modification of cotton fabrics for improving utilization of reactive dyes

Abstract

The cotton fabric was modified by the eco-friendly cationic polymer. The modified cotton fabric could be dyed with reactive dyes without salt. This investigation provided a feasible and eco-friendly way to realize salt-free dyeing of reactive dyes.

Ag nanoparticles-based antimicrobial polycotton fabrics to prevent the transmission and spread of SARS-CoV-2

“…The peaks located at 3540, 2936 and 2124 cm -1 refer to OH stretching and CH deformation respectively, the latter being related to the CH 2 groups of the cellulose structure. [44,45] The peaks located in 1947, 1710, 1338 and 1147 cm -1 correspond respectively to H 2 O adsorbed on the polycotton surface, stretching of the CH bond, asymmetric deformation of the C-O-C groups and were attributed to stretching vibrations of intermolecular ester bonding. [45][46][47] As in the Raman spectra, the cotton fingerprint can be observed in the FTIR due to the presence of the band located at 832 cm -1 , referring to the asymmetric stretching of the glycosidic ring, especially the C 1 -O-C 4 bonds.…”

“…[44,45] The peaks located in 1947, 1710, 1338 and 1147 cm -1 correspond respectively to H 2 O adsorbed on the polycotton surface, stretching of the CH bond, asymmetric deformation of the C-O-C groups and were attributed to stretching vibrations of intermolecular ester bonding. [45][46][47] As in the Raman spectra, the cotton fingerprint can be observed in the FTIR due to the presence of the band located at 832 cm -1 , referring to the asymmetric stretching of the glycosidic ring, especially the C 1 -O-C 4 bonds. [46] It is observed for the modified polycotton in relation to the non-treated polycotton the displacement of the band located at 1338 cm -1 , as well as the decrease of the band located around 647 cm -1 , referent to in-plane bending of O-H mode from the glycosidic units and deformation of the OH, respectively.…”

Synthesis of Modified Starch/Polyvinyl Alcohol Composite for Treating Textile Wastewater

“…The peak at 1027 cm −1 was attributed to the stretching vibration of C-O-C. The peak at 1444 cm −1 was assigned to the bending vibration of C-N [32,44]. For the FT-IR spectra of (a) CCS, the peaks at 3404, 2926, and 1018 cm −1 were attributed to the stretching vibration of O-H, C-H, and C-O-C, respectively.…”

Facile salt‐free process for cotton fabric dyeing: Pad‐irradiate‐pad‐steam process using 3‐chloro‐2‐hydroxypropyl trimethyl ammonium chloride

“…CHPTMAC is a commercial esterifying agent that is widely used to modify cotton fibers in practical production using the exhausting method, but the weak affinity between CHPTMAC and the fiber results in poor grafting on the cotton fabric . To address this issue and promote the reaction between CHPTMAC and the cotton fiber, cotton fabric was padded with a solution containing CHPTMAC, and microwave irradiation was used.…”

“…CHPTMAC is a commercial esterifying agent that is widely used to modify cotton fibers in practical production using the exhausting method, but the weak affinity between CHPTMAC and the fiber results in poor grafting on the cotton fabric. 14 15 When the CHPTMAC concentration is higher than 100 g/L, the nitrogen content of the cotton fabric increases slowly, while the grafting efficiency decreases drastically. This occurs because the amorphous region has a limited number of hydroxyl groups, which easily react with the cotton as the amount of CHPTMAC increases until an equilibrium is reached.…”