Multifunctional properties of cotton fabric treated with chitosan and carboxymethyl chitosan (original) (raw)
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Study of Chemical Treated Cotton Fabric for functional Finishes using Chitosan
Cotton fabrics were treated with sodium hydroxide, morpholine and cellulase enzyme. These treated cotton fabrics were applied by chitosan followed by dyeing with some selected dyes such as annatto, onion, pomegranate, indigo, myrobalan, bar berry (natural dyes); and reactive and Sulphur dyes (synthetic) respectively. These treated samples were tested for different functional properties such as, wicking, water vapor & air permeability, K/S value, fastness properties, antimicrobial property, and SEM analysis. Results show that chitosan treatment imparts functional properties on cotton fabrics. Among all the treated fabrics, sodium hydroxide treated cotton fabric revealed higher values.
Antibacterial activity of cationically modified cotton fabric with carboxymethyl chitosan
Journal of Applied Polymer Science, 2008
A water-soluble carboxymethyl chitosan was prepared with a view to develop a multifunctional finish on cotton. Carboxymethyl chitosan (CMCTS) was synthesized by chemical reaction of chitosan with monochloroacetic acid under alkaline condition. The water soluble CMCTS was applied to cationized cotton with different concentrations. The treated fabrics were characterized through monitoring the textile physical properties and for the antibacterial activity against Escherichia coli DSMZ 498 and Micrococcus luteus ATCC 9341. The results obtained show that the physical properties of the treated fabrics are improved by increasing the CMCTS concentration, as well as the antibacterial activity.
Treatment of Cotton with Chitosan and Its Effect on Dyeability with Reactive Dyes
D yeing behaviour of chitosan pretreated cotton fabric with reactive dyes is the subject of this study. Cotton fabric is treated with chitosan using five different techniques, consisting of exhaustion, pad-dry, pad-batch, pad-steam and pad-drysteam methods. To find the influence of concentration of chitosan on the dyeability behaviour, different amounts of chitosan were used and the suitable concentration was determined. It is observed that chitosan pretreatment increases the exhaustion of reactive dyes and the highest dye up-take is achieved for pad-dry method. The effect of the period of storage of chitosan treated sample before dyeing process on dyeability of fabrics is examined by comparison of samples which was dyed immediately after treatment with the one which was kept for 48 h after treatment. The results show that dyeing immediately after treatment leads to higher dyeability and the effect of treatment decreases for the samples which were pkept for 48 h before dyeing process. The light and wash fastnesses of treated samples are measured and some reduction in light and wash fastnesses were observed.
Cellulose, 2017
In this study, cotton fabrics were chemically crosslinked with Chitosan-Cyanuric Chloride hybrid (Ch-Cy) in order to improve their physicalchemical properties. The effect of operational parameters (e.g., initial concentration of Ch-Cy, temperature, reaction time and pH) on the grafting process was evaluated. A high weight gain of the cotton fabrics (* 4%) was obtained under optimum conditions at initial concentration [Ch-Cy] = 30% over weight of fabric (o.w.f.), at 50°C, pH 4 after 3 h. The treated and untreated cotton samples were dyed with three natural dyes (i.e., cochineal, madder and weld). The dye absorption of the treated samples was improved noticeably and according to the grafted amount of Ch-Cy on the fabrics. Despite the dye adsorption enhancement, the fastness properties (washing, light, rubbing) of the dyed samples remained at acceptable level. The wrinkle recovery angle of the treated samples increased minimum 60°showing the enhancement in the crease recovery of the fabrics. The treated cotton samples also showed promising antimicrobial behavior against gram negative and gram positive bacteria. This study shows that the dye adsorption, antimicrobial and anti-creasing properties of the treated samples are enhanced by this chemical treatment without any adverse effects on their tensile strength and color fastness properties. Keywords Chitosan Á Cotton fabric Á Crosslinking Á Anti-microbial Á Anti-creasing Á Natural dyeing Electronic supplementary material The online version of this article (
Carbohydrate Polymers, 2012
The purpose of this work was to develop a textile finish based on radical UV-curing of chitosan on cotton and silk to confer antimicrobial properties. Fabrics were impregnated with a solution of 2% w chitosan in aqueous acetic acid (2% v/v) added of 2-hydroxy-2-methylphenylpropane-1-one (2% w/w with respect to chitosan) as photoinitiator and cured at room temperature by exposure to UV lamp for 60 s on both the sides. The antimicrobial activity of finished fabrics was tested according to ASTM standard test performed with Escherichia coli. Obtained results showed a strong antimicrobial activity conferred by the treatment, homogeneous on fabric surface, without affecting the hand properties of fabrics due to the low chitosan weight on (about 2%). The treatment durability to domestic laundering was tested after 5 cycles using either anionic or nonionic detergents. The antimicrobial activity resulted completely maintained after washing with a nonionic surfactant, while with anionic detergents the treatment durability was better for samples prepared with a deeper penetration of chitosan inside the fibers. The fabrics were characterized by dyeing tests, SEM and FTIR-ATR analyzes.
Multifunctional finishing of cotton using chitosan extracted from bio-waste
International Journal of Biological Macromolecules, 2013
In the current work, chitosan extracted from waste shrimp shells was used in finishing formulation for cotton fabric, along with DMDHEU and other chemicals, imparting multiple performance characteristics such as wrinkle free, antibacterial and flame retardant properties. The finished fabrics were evaluated for textile properties like tensile strength, bending length, yellowness index and functional properties like crease recovery angle, antibacterial activity and flame retardancy and also for the ecological properties like formaldehyde release. The finished fabric showed excellent crease recovery, antibacterial property and flame retardancy which were retained to a moderate extent even after 20 washes. Besides formaldehyde scavenging action, chitosan clearly showed its positive role in imparting multifunctional properties to cotton.
2021
Chitosan nanoparticles were prepared as green antibacterial finishing material and enhance antimicrobial activity of cellulose-based fabrics such as cotton and viscose. Two new bifunctional dye Bis (monochlorotriazine) (MCT) and hetero bifunctional (SES/MCT) reactive dyes have been prepared in previous work. Dimedone moiety (5,5Dimethylcyclohexane-1,3-dione) and applied in cellulose-based fabrics with various chitosan nanoparticles concentrations imparting them antimicrobial activity. In this work the effect of chitosan nanoparticles on dye ability of cellulose-based fabrics were studied from evaluation of the colour strength expressed in K/S values of the dyed fabrics at different concentration of chitosan nanoparticles and the two synthesized used dyes. Results showed that chitosan nanoparticles treated cellulose-based fabrics have higher affinity towards dyeing than untreated cellulose-based fabrics. Also, the antimicrobial properties of the treated fabrics were higher than that ...
Biopolymers are one of the suitable alternate materials for different chemical processes because of its environmental friendly behavior. This research work shows a comparative analysis of silk dye with acid dye before and after Chitosan treatment. In this analysis silk yarns are treated with two different Chitosan 0.5% & 1.0% at temperature (40 & 60)° C respectively and dyed with acid dye at pH 6.00. The study focus on the dye uptake %, color strength value (K/S), different types of fastness properties, antimicrobial properties and the strength of dyed sample. It was found that sample treated with 1% Chitosan showed better dye uptake at 40°C and 60°C are 86.82% and 88.28% respectively, color strength value at 40°C and 60°C are 6.64 and 7.10 respectively and color fastness also increases with increase of temperature. The effects of Chitosan on the antibacterial properties of silk yarns against both of gram positive and gram negative bacteria such as Bacillus cereus, Stophyloccus aureus, Escherichia coli, Salmonella typhi, Psedomonous aeroginosa and Shigella dysenteriae were investigated and show the antibacterial potential due to the antimicrobial property of Chitosan. KEYWORD: Silk fiber, acid dye, chitosan, antimicrobial activity, Scanning electron microscopy and silk dyeing.
The Chitosan Implementation into Cotton and Polyester/Cotton Blend Fabrics
Materials
Chitosan is an environmentally friendly agent that is used to achieve the antimicrobial properties of textiles. Nowadays, the binding of chitosan to the textiles has been thoroughly researched due to the increasing demands on the stability of achieved properties during the textile care processes. Most crosslinking agents for chitosan are not safe for humans or environment, such as glutaric aldehyde (GA) and formaldehyde derivatives. Eco-friendly polycarboxyilic acids (PCAs) are usually used in after-treatment. In this work, chitosan powder was dissolved in citric acid with sodium hydrophosphite (SHP) as a catalyst. Standard cotton (CO) and polyester/cotton (PES/CO) fabrics were pretreated in 20% NaOH, similar to mercerization, in order to open the structure of the cotton fibers and hydrolyze polyester fibers, continued by finishing in the gelatin chitosan bath. Afterwards, the hot rinsing process, followed by drying and curing, closed the achieved structure. The main objective was t...