Antibacterial Finishing and Dyeing Affinity Enhancement of cellulose-based fabrics via pre-treatment by chitosan nanoparticles treatment (original) (raw)
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Egyptian Journal of Chemistry, 2020
T he present work was carried out to study the effect of prepared chitosan nanoparticles (CNPs) on the dye ability of silk fabric dyed with mono and bi functional reactive dyes. In order to obtain the optimum condition of using nano chitosan the silk fabric was treated with different concentration of nano-chitosan using three different methods (a)pretreatment,(b)one bath process and (c)post-treatment. The colour strength (K/S) and colour parameters of dyed silk samples were measured for each method. The change in silk fabric surface morphology after using nano chitosan was examined with SeM. The K/S results of silk dyed samples treated with nano chitosan solution were higher comparable to the untreated samples.furthermore nanochitosan exhibit superior behaviour as antibacterial agent against both gram-positive and negative bacteria .
Eco-Friendly Pretreatment of Cellulosic Fabrics with Chitosan and Its Influence on Dyeing Efficiency
Natural Dyes, 2011
Wet processing of textiles uses large quantities of water, and electrical and thermal energy. Most of these processes involve the use of chemicals as assisting, accelerating or retarding their rates and are carried out at elevated temperatures to transfer mass from processing liquid medium across the surface of textile material in a reasonable time. So, we can use some natural materials and some physical tools to reduce the chemicals, water, energy and pollution. This tools and natural material can use also to improvement the fabrics surface via introduce new active groups on its. Improvement of the fabrics surface can increase the efficiency of bleaching, dyeing and finishing processes. Chitin, a major component of the shell of crab and shrimp is one of the most abundant natural polysaccharides with a large unexplored commercial potential. Chitosan is partially or completely N-deacetylated chitin and mainly consists of B-(1,4)-linked 2-amino-2-deoxy-B-D-glucopyranose. In recent years, a number of investigations have been carried out to exploit the potential applicability of chitosan (1). Chitosan have many applications in the medical and textile fields. Cellulose which has been known to have good physical properties has been widely used as construction material, paper and clothes. Cellulosic fabrics can be oxidized by several oxidizing agents such as hydrogen peroxide (H 2 O 2) , sodium persulphate (Na 2 S 2 O 8) and potassium periodate (KIO 3). Oxidation of cellulosic fabric using sodium metaperiodate (NaIO 4) has been extensively investigated in the literature, since it leads to selective cleavage at the C2 and C3 vicinal hydroxyl groups to yield a product with 2,3-dialdehyde units along the polymer chain (2). The latter is an important functional polymer for further derivatisation to specialized products. As a naturally deriving substances, chitosan and cellulose share several common beneficial properties such as being nontoxic and biodegradable. Structurally, chitosan is slightly different from cellulose as the monosaccharide in chitosan chain is 2-amino-2-dehydroxy-Dglucose instead of D-glucose. The presence of amino group is responsible for the complete solubility of chitosan in a diluted aqueous acidic solution as a polycationic polymer whereas cellulose is totally insoluble. This polycationic nature makes chitosan very appealing as a surface treating agent for cellulose fabrics to improve its dyeability to reactive and acid dyes. C h i t o s a n u s e d f o r s u r f a c e m o d i f i c a t i o n o f c e l l u l o s e f a b r i c s. D i r e c t p a d d i n g o r www.intechopen.com Natural Dyes
Cellulose, 2008
The surface modification of cellulose fabric with chitosan was achieved through an oxidation of the fabric with KIO 4 followed by reductive ammination with chitosan. The chitosan content in the fabric determined by Kjeldahl nitrogen analysis technique was 1.69%. The scanning electron micrograph revealed submicron particles of chitosan attached on the fabric surface. Dyeing of the modified fabrics with mono-chloro-triazine and vinyl sulfone anionic reactive dyes, showed vastly improved exhaustion and color yield (K/S) indicating that this method of surface modification is effective for changing surface activity of the fabric. The enhancement of the dye uptake brought about an improved dyeing process in which the dye and salt used could be reduced by half and 14%, respectively. A Significant drop in burst strength upon the oxidation but no discernable adverse color fastness property was observed for the chitosan-modified fabric.
Materials, 2021
This research proposed two pretreatments of viscose fabrics: oxidation with 2,2,6,6-tetramethylpiperidine-1-oxy radical (TEMPO) and coating with TEMPO-oxidized cellulose nanofibrils (TOCN), to introduce functional groups (COOH and CHO) suitable for irreversible binding of chitosan nanoparticles without and with embedded zinc (NCS and NCS + Zn, respectively) and consequently achieving washing durable antibacterial properties of the chitosan nanoparticles functionalized fabrics. The characterizations of pretreated and chitosan nanoparticles functionalized fabrics were performed by FTIR and XPS spectroscopy, elemental analysis, inductively coupled plasma optical emission spectrometry, zeta potential measurements, scanning electron microscopy, determination of COOH and CHO groups content, and antimicrobial activity under dynamic contact conditions. Influence of pretreatments on NCS and NCS + Zn adsorption, chemical, electrokinetic, and antibacterial properties as well as morphology, and...
Multifunctional properties of cotton fabric treated with chitosan and carboxymethyl chitosan
Carbohydrate Polymers, 2007
A water soluble carboxymethyl derivative of chitosan was prepared with a view to develop a multifunctional finish on cotton. Results show that treated cotton has better dyeability with direct and reactive dyes. Treatment with modified chitosan makes it possible to dye cotton in bright shades with cationic dyes having high wash fastness. Treated samples showed good antimicrobial activity against Escherichia coli and Staphylococcus aureus at 0.1% concentration as well as improved wrinkle recovery. The effect was found to be durable for five laundering cycles.
Studies on dyeing properties of chitosan modified cellulosic fiber
Journal of Textile Engineering & Fashion Technology
This paper presents the possibility of salt free dyeing of cotton fabric with reactive dye by treating the cotton with chitosan from fish scale and used as a salt for dyeing of cotton with reactive dye. Cellulosic fiber acquires negative charge in aqueous medium and thus repels negatively charged dye anion during dyeing. Such repulsion between fibre and dye is offset by using large quantity of salt in dye bath, particularly for reactive dyes. A low dye bath exhaustion also leads to low dye fixation of reactive dyes on cotton. Therefore the discharged wastewater from dye house creates avoidable environmental threats due to very high dye concentration. Hence, surface modification of cotton to increase dye-fibre interaction is thus the best route to overcome the lack of affinity of cotton to reactive dyes making salt-free reactive dyeing. In this investigation an attempt was made to modify cotton with chitosan extracted from fish scales. The chitosan modified cotton was dyed with react...
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 (
Materials
The main objective of this study was to obtain chitosan functionalized viscose fabric with improved antibacterial properties and washing durability. In this regard carboxyl and aldehyde groups, as binding points for irreversible chitosan attachment into/onto viscose fabric, were introduced by two different pretreatments: 2,2,6,6-tetramethylpiperidine-1-oxy radical (TEMPO) oxidation and coating with TEMPO oxidized cellulose nanofibrils (TOCN). The Fourier transform infrared spectroscopy, elemental analysis, zeta potential measurements, scanning electron microscopy, breaking strength and antibacterial testing were used to evaluate the influence of these pretreatments on chitosan binding, but also on chemical, electrokinetic, morphological, mechanical and antibacterial properties of pretreated and chitosan functionalized viscose fabrics. Washing durability of chitosan functionalized viscose was monitored through changes in the chitosan content, electrokinetic and antibacterial properti...
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.