Antimicrobial chitosan finish of cotton and silk fabrics by UV-curing with 2-hydroxy-2-methylphenylpropane-1-one (original) (raw)
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Journal of Cleaner Production, 2013
The topic of the present study was the antibacterial finishing of cotton fabrics by ultraviolet grafting of chitosan biopolymer on fiber surface. A first part, carried out at laboratory level, deals with the optimization of process parameters, followed by a deep characterization of treated samples, revealing the effectiveness of the treatment. Therefore, the applied method was carefully monitored, laboratory apparatus were used and just samples of small surface were prepared by UV-grafting of pure chitosan in inert atmosphere, on dried samples, as recommended for radical curing.
Use of Chitosan as Antimicrobial, Antiviral and Antipollution Agent in Textile Finishing
Fibres and Textiles, 2022
With the industrial developments in recent times, the textile industry also needs sustainable and environmental-friendly resources. Today's world has been overburdened with the use of synthetic or hazardous materials in day-today life. Chitosan polymer obtained from chitin deacetylation, having a lot of properties beneficial to mankind without being hazardous to environment and humans is currently gaining popularity for research and development all over the globe. Antimicrobial and antiviral textile finishing with the help of chitosan is a new trend in the textile field. Also, chitosan having good adsorption properties finds its application in textile effluent treatments. This review reports and discusses multifunctional finishing and dyeing of textiles with chitosan and highlights its application for textile wastewater treatment.
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.
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.
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.
Multifunctional finishing of wool fabrics by chitosan UV-grafting: An approach
Carbohydrate Polymers, 2013
The aim of this study was the surface modification of wool fibers to confer a multifunctional finishing to the fabrics, improving the textile value and its applications without damage of comfort properties. The attention was focused on an economical and environmental friendly process to obtain an effective treatment with good durability to washing.
Journal of Polymers and the Environment, 2019
Health and hygiene are the primary obligations for human beings to live comfortably and work with maximum safety. The aim of the present work is to develop environmentally friendly protective textiles. Aloe vera extract and chitosan on bleached cotton woven fabrics for medical and health care apparel. The modified fabric was tested for its resistance to the growth of gram-positive Staphylococcus aureus bacteria. The A. vera extract and chitosan were applied, alone or together, on cotton samples by the pad-dry-cure method, using critic acid as the cross-linking agent. The applications of 2 g/l chitosan and 2 g/l A. vera combinations on cotton fabric showed excellent antimicrobial resistance against gram-positive S. aureus bacteria. Bacteria were reduced by 81%, which was greater than the 6 g/l individually-treated result. After treatment, the tensile strength and whiteness index were tested. Thickness and crease recovery angle were increased. Soil degradation tests proved the bio-compatibility of the treated sample. The incorporation of chitosan and A. vera on the surface of the cotton fabric was investigated by FTIR, XRD and thermal analysis. The surface morphology of treated and untreated fabrics was evaluated using high resolution scanning electron microscopy. Air permeability, water vapour permeability and thermal conductivity indicate thermal comfort that was not significantly affected by finishing treatment. Finished cotton fabric also showed a significant improvement in UV-protection.
Journal of Applied Polymer Science, 2008
Nonwoven polypropylene and cotton fabrics were subjected to plasma pretreatment followed by flash evaporation and radiation crosslinking acrylate polymer coating, which is based on a vacuum deposition, solvent free, process that produces high quality, uniform fabrics with various thicknesses (0.05-5.0 mm). These treated fabrics were then dipped into chitosan, carboxymethyl chitosan, and carboxymethyl chitin solution. These polysaccharides form strong complexes with the modified surface. The antimicrobial activity of these treated samples was then evaluated for their antifungal and antibacterial properties. The antifungal activity for Fusarium oxysporum f. sp. lycopersici, Verticillium albo-atrum, and Alternaria solani (A. alternata) were examined by the disc plate method. The antibacterial activities of the modified fabrics against Clavibacter michiganensis and Pseudomonas solanacearum were also examined by the viable cell counting method. The inhibition zone of the chitosan covered samples has increased by a factor of 2-3.1 over the original pretreated samples. The chitosan-modified fabrics showed a good antibacterial activity in killing almost 10 5 cells/mL within 18-23 h.
Molecular weight effect on antimicrobial activity of chitosan treated cotton fabrics
Journal of Applied Polymer Science, 2001
The effect of the molecular weight of chitosan on antimicrobial activity was investigated using three chitosans of different molecular weights [1800 (water soluble), 100,000, and 210,000] and similar degrees of deacetylation (86 -89%). Cotton fabrics were treated with chitosan by the pad-dry-cure method. The molecular weight dependence of the antimicrobial activity of chitosan was more pronounced at a low treatment concentration. Chitosans with molecular weight of 100,000 and 210,000 effectively inhibited Staphylococcus aureus at a 0.5% treatment concentration. Chitosan with a molecular weight of 1800 was effective against S. aureus at a 1.0% treatment concentration. Escherichia coli was effectively inhibited by chitosan with a molecular weight of 210,000 at a 0.3% treatment concentration and by chitosans with a molecular weight of 1800 and 100,000 at a 1.0% treatment concentration. Proteus vulgaris was effectively inhibited by chitosans with molecular weight of 100,000 and 210,000 at a 0.3% treatment concentration and by chitosan with a molecular weight of 1800 at a 0.5% treatment concentration. None of the chitosans significantly inhibited Klebsiella pneumoniae and Pseudomonas aeruginosa below a 1.0% treatment concentration. Chitosans with high molecular weights were more effective in inhibiting bacterial growth than chitosans with low molecular weights.
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 .