Development of Antimicrobial and Water Repellent/ Hydrophobic (easy-cleaning) Properties on Cotton Fabrics Using Nanocoating Processes (original) (raw)

Characterization of nanosilver coated cotton fabrics and evaluation of its antibacterial efficacy

An ecological and viable method for coating of cotton fabrics with silver nanoparticles (AgNPs) has been carried out. Nanocoated fabrics were characterized by scanning electron microscopy, energy dispersive X-ray and infrared spectroscopy. Color coordinates and silver release were assessed and the impact ofrepeated washings was evaluated. Silver contents were measured using atomic absorption spectroscopy and were 109.07 and 97.85 mg/kg for the fabrics treated with 100 ppm of AgNPs in presence and absence of binder respectively. Antibacterial activities of the cotton fabrics coated by AgNPs were evaluated qualitatively and quantatively, and the results explored that, regardless of the concentration of AgNPs used, the biocidability was always higher without washing. However, for all coated fabrics, a sufficient antibacterial action still observed after 20 washings. The results revealed that valuable antibacterial textiles which are required in different medical textile fields could be successfully produced.

Development of improved nanosilver-based antibacterial textiles via synthesis of versatile chemically modified cotton fabrics

Carbohydrate polymers, 2014

Cationization of cotton fabric form was effected by reacting the cellulose with 3-chloro-2 hydroxypropyl trimethyl ammonium chloride in presence of sodium hydroxide as per the pad dry cure method. Thus obtained cationized cotton cellulose was reacted with a reactive copolymer, namely, reactive β-cyclodextrin grafted with polyacrylic acid (MCT-βCD-g-PAA).Bridging of another copolymer, namely, β-cyclodextrin grafted with polyacrylic acid (βCD-g-PAA) to the cationized fabric using epichlorohydrin crosslinker was also performed. Inclusion of Ag nanoparticles in these three cotton substrates via treatment of the latter with colloid of Ag nanoparticles or through in situ formation of the former was exercised. Characterization of cotton fabric before and after being chemically modified was carried out using FTIR, XRD and SEM. Bacterial examination of the cationized cotton containing either (MCT-βCD-g-PAA) or (βCD-g-PAA) incorporated with Ag nanoparticles showed these substrates function ag...

One-pot fabrication of durable antibacterial cotton fabric coated with silver nanoparticles via carboxymethyl chitosan as a binder and stabilizer

Carbohydrate polymers, 2019

In this article, durable antimicrobial cotton fabric was prepared by a one-pot modification process using a colloidal solution of silver nanoparticles (Ag NPs) stabilized by carboxymethyl chitosan (CMC). Due to coordination bonds between the amine groups of CMC and the Ag NPs and the ester bonds present between the carboxyl groups of CMC and the hydroxyl groups of cellulose, the Ag NPs were tightly immobilized onto the cotton fiber surface. As a result, the Ag NPs that were adhered on the cotton fabrics have uniform dispersion and small size, ranging from 10 nm to 80 nm. This provides the cotton fabric with remarkable and durable antibacterial activity against both S. aureus and E. coli. After 50 laundering cycles, the bacterial reduction rate (BR) for the modified cotton fabric remained over 94%. This method is simple, and it is particularly suitable for the industrial finishing process.

Development of antimicrobial activity and mechanical performances of cotton fabric treated with silver nano particles (AgNPs)

8TH BSME INTERNATIONAL CONFERENCE ON THERMAL ENGINEERING

The current research focuses on the synthesis, characterization and application of silver nano particles (AgNPs) on cotton fabric to create the antimicrobial property and improve its mechanical performances. Here nano particles are synthesized by reduction of salt in sol-gel method and applied on cotton fabric surface by mechanical thermo fixation technique. Various instrumental tests like UV spectroscopy, zetasize analyzing and scanning electron microscopy (SEM) are carried out to characterize the synthesized nano particles. The size of AgNPs is found about 60 nm and the shape is approximately spherical. The antimicrobial activity of treated fabric is examined against two bacteria named S. aureus (gram positive) and E. coli (gram negative) by bacterial reduction system. The result shows very good antimicrobial property in both gram positive and gram negative bacteria. An appreciable improvement on mechanical performances of nano treated fabric is also obtained.

Effects of Hydrodynamic Diameter of Nanoparticles on Antibacterial Activity and Durability of Ag-treated Cotton Fabrics

Fibers and Polymers, 2020

In this paper, silver nanoparticles (Ag-NPs) colloidal suspensions with different particle sizes of 5 to 40 nm were prepared. Dynamic light scattering (DLS) technique showed that the average hydrodynamic diameters of Ag-NPs were much larger than the particle diameters obtained using transmission electron microscopy and UV-Vis spectroscopy. The as-prepared Ag-NPs with different average hydrodynamic diameters were incorporated in cotton fabrics by the pad-dry-cure method. The silver content before and after washing cycles were determined by inductively coupled plasma spectrometry (ICP). The antibacterial properties of the fabrics after 0, 5 and 10 laundering cycles against both the Gram-negative bacterium of Escherichia coli (E. coli) and the Gram-positive bacterium of Staphylococcus aureus (S. aureus) were examined and a clear volcano trend was observed between the bacterial reduction rate (BR) and the hydrodynamic diameter of Ag-NPs loaded on the fibers. The cotton fabric treated by the Ag-NPs with the hydrodynamic diameter of 52 nm, exhibited the highest antibacterial activity (about 98 %) after 10 laundering cycles, while the other samples on either side of the volcano were less active. The cytotoxicity of the cotton fabrics treated with Ag-NPs was assayed on mouse embryonic fibroblast cells and evaluated by an MTT assay. The results showed that Ag-NPs were not toxic. Field emission scanning electron microscopy (FESEM) obtained from the cotton fabric before and after washing cycles demonstrated that the Ag-NPs had tight bonds with the surface of cotton fabric.

Experimental Study on Dyeing Performance and Antibacterial Activity of Silver Nanoparticle-Immobilized Cotton Woven Fabric

Autex Research Journal

The purposes of the current research were to deposit the silver nanoparticles on the surface of a textile woven fabric and evaluate their dyeing performance and antibacterial activity. The synthesis of silver nanoparticle (Ag°) is done by the in situ method. Strong alkali is used to improve functionality of cellulose before the application of silver nitrate salt (AgNO3). The silver nanoparticle is formed by reduction of ascorbic acid. Various instrumental analyses are done to prove the formation of nanoparticles on the fabric surface. The morphology of nanodeposited fabric is characterized by using scanning electron microscope (SEM), elemental composition is done by energy dispersive spectroscopy, and crystallinity of nanoparticles is obtained by X-ray diffraction (XRD). Nanodeposited fabric is then dyed with direct dyestuff (Direct Red-89). Fourier transform infrared spectroscopy analysis is done to explore the bonding phenomena of un-dyed and dyed fabrics. The dyeing performance a...

Investigation of antibacterial activity of cotton fabric incorporating nano silver colloid

Journal of Physics: Conference Series, 2009

In this work, silver nanoparticles were prepared by polyol process with microwave heating and incorporated on cotton fabric surfaces. The antibacterial performance of the antibacterial cotton fabric was tested for different concentration of nano-sized silver colloid, contact time germs, and washing times. It was found that antibacterial activity increased with the increasing concentration of nano-sized silver colloid. The antibacterial fabric with 758 mg/kg of silver nanoparticles on surface cotton was highly effective in killing test bacteria and had excellent water resisting property.

Antibacterial activity and the hydrophobicity of cotton coated with hexadecyltrimethoxysilane

AIP Conference Proceedings, 2017

In this work, cotton fiber was fabricated using silver nanoparticles to produce hydrophobic and antibacterial material. The silver nanoparticle was prepared with chemical reduction method using trisodium citrate as reducing agent and PVA as stabilizer. Silver nanoparticle was deposited on cotton fibers as antibacterial agent and HDTMS 4% v/v was coated on those as hydrophobic agent. The cotton fibers before and after modification were characterized its functional groups, contact angles, and antibacterials activities. The functional groups of cottons were determined by using ATR-FTIR, hydrophobic properties of cottons were determined by measuring contact angle, and antibacterial activities of cottons were determined by measuring clear zone. The addition of HDTMS decreased the intensity of absorption bands of functional groups but increased contact angle of cotton cloth. The cotton cloth-silver nanoparticle shows the highest antibacterial properties. The antibacterial activity of cotton cloth without and with modification against Staphylococcus aureus ATCC 25923 and Eschericia coli 32518 were significantly different.

The influence of triangular silver nanoplates on antimicrobial activity and color of cotton fabrics pretreated with chitosan

Journal of Materials Science, 2014

The effect of cotton fabric pretreatment with biopolymer chitosan (CHT) on deposition of colloidal triangular silver nanoplates was studied. Also, the influence of deposited silver nanoparticles on color and antimicrobial activity of cotton fabrics was evaluated. Characterization of colloidal silver nanoparticles as well as silver nanoparticles deposited on cotton fabrics was performed using electron microscopy (TEM and FESEM), XRD analysis, atomic absorption spectroscopy, UV-Vis absorption, and reflectance spectroscopy. The cotton fabric turned from white to blue color upon deposition of triangular silver nanoplates. Antimicrobial activity of CHT pretreated cotton fabric impregnated with silver nanoparticles was tested against Gram-negative bacteria Escherichia coli, Grampositive bacteria Staphylococcus aureus, and fungi Candida albicans. Deposited silver nanoparticles imparted excellent antimicrobial properties to cotton fabric. The standard sterilization procedure of cotton fabric for antimicrobial activity testing resulted in color change of the fabric from blue to yellow. This color change is most likely consequence of transformation of triangular silver nanoplates into nanodiscs and/or their agglomeration into spheroids.

Preparation of Antibacterial Cotton Fabric Using Chitosan-silver Nanoparticles

The aim of this study was to prepare antibacterial cotton fabric using chitosan-silver nanoparticles (CS-AgNPs). CS-AgNPs were used as finishing agent for 100 % pure cotton fabric. AgNPs were prepared by Turkevich method. CS-AgNPs were synthesized by mixing chitosan solution with silver nanoparticles. Fourier transform infrared (FTIR) spectrometer technique supported the formulation of CS-AgNPs. Cs-AgNPs crystalline peaks were in perfect agreement with JCPDS card no. 89-3722. Two gram negative bacteria Escherichia coli, Pseudomonas aeruginosa and two gram positive bacteria Bacillus cereus, Staphylococcus aureus were used to test the bacterial efficacy of synthesized AgNPs and CS-AgNPs. Scanning electron micrograph of cotton fabric revealed the presence of CS-AgNPs on the surface of cotton fabric. The presence of small amount of silver nanoparticles in the composite was enough to enhance antibacterial activity significantly compared to pure chitosan.