Green synthesized chitosan and ZnO nanoparticles for sustainable use in multifunctionalization of cellulosic fabrics (original) (raw)
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Synthesis of chitosan/ZnO nanoparticles was performed using different concentrations of ZnO at different temperatures. Nanoparticles of ZnO/chitosan were prepared in rod form with average length 60 nm and average width 5-15 nm. Thus, obtained nanoparticles of ZnO/chitosan were characterized using UV spectrophotometer, FTIR, TEM, X-ray, and SEM. Size and shape of chitosan/ZnO nanoparticles relied on conditions of their synthesis. Notably, chitosan/ZnO in rod form with average length of 60 nm and average width 5-15 nm could be achieved. Application of chitosan/ZnO nanoparticles to cotton fabric conferred on the latter antibacterial and UV protection properties. Cotton fabric was characterized using SEM, ultraviolet protection factor (UPF) rating, and antibacterial (gram-positive and gram-negative) characteristics. Finished cotton fabric exhibited good antibacterial properties against gram-positive and gram-negative bacteria. The UV testes indicated a significant improvement in UV protection of finished cotton fabric which is increasing by increasing the concentration of nanoparticles of ZnO/chitosan.
Egyptian Journal of Chemistry
A NTIBACTERIAL and easy care characteristics were imparted to cotton fabrics using multifinishing formulation comprising citric acid (CA) and chitosan nanoparticles (CNPs) as an eco-friendly finish. The latter of size around 60-100 nm were prepared through polymerization of meth acrylic acid (MAA) with chitosan using potassium permanganate as initiator and characterized using scanning electron microscope, transmittance electron microscope, Fourier transformer infrared spectroscopy, particle size analyzer, X-ray diffraction and thermo gravimetric analysis. Different factors affecting the degree of multifinishing treatment and their onset on fabric performance and antimicrobial activity were studied and optimized according to pad dry cure method. This was done to see the impact of chitosan nanoparticles to accomplish multifunction characteristics on cotton fabrics like reasonable strength loss, comparable wrinkle recovery angles, elongation at break, higher fabric stiffness and suitable durability in addition to antibacterial activity. It was seen from the attained results that; FTIR spectra and SEM micrograph showed the change in chemical structure and surface morphology of cotton fabric before and after finishing in absence and presence of chitosan nanoparticles. These fabrics parade antimicrobial activity against gram-positive and gram-negative bacteria tested even after 10 washing cycles. Mechanism of finishing of cotton fabric using citric acid and CNPs is identified.
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 ...
ZnO nanoparticles-chitosan composite as antibacterial finish for textiles
The antibacterial performance of sol-gel-derived inorganic-organic hybrid polymers filled with ZnO nanoparticles-chitosan against a gram-negative bacterium Escherichia coli and a gram-positive Micrococcus luteus has been investigated. Three different molecular weights (MW) of chitosan (CTS) 1.36 · 10 5 , 2.2 · 10 5 , and 3.0 · 10 5 Da with equal degree of deacetylation (DD, 85%) (coded as S 85-60, He 85-250, and He 85-500) with equal degree of deacetylation (DD, 85%) were examined. ZnO was prepared by the base hydrolysis of zinc acetate in isopropanol using lithium hydroxide (LiOH · H 2 O) to hydrolyze the precursor. Sol-gel-based inorganic-organic hybrid polymers were modified with these oxides and were applied to cellulosic cotton (100%) and cotton/polyester (65/35%) fabrics. Inorganic-organic hybrids polymers were based on 3-glycidyloxypropyltrimethoxysilane (GPTMS). Bacteriological tests were performed in nutrient agar media on solid agar plates and in liquid broth systems using ZnO nanoparticles with average particle size of (40 nm). Our study showed the enhanced antibacterial activity of ZnO nanoparticles chitosan (different MW) of against a gram-negative bacterium Escherichia coli DSMZ 498 and a gram-positive Micrococcus luteus ATCC 9341 in repeated experiments. The antibacterial activity of textile treated with ZnO nanoparticles chitosan increases with decreasing the molecular weight of chitosan.
ZnO/carboxymethyl chitosan bionano-composite was prepared at different temperatures. ZnO/ carboxymethyl chitosan bionano-composite was characterized by UV spectroscopy, FTIR and transmission electron microscope (TEM). The results obtained confirmed the formation of the bionano-composite. The mean sizes of ZnO and carboxymethyl chitosan particles were ≈28 nm and ≈100 nm, respectively. The obtained bionano-composite was used as a finishing agent for cotton fabric to impart UV protection and antibacterial properties (multifunctional finishing) to cotton fabric. The finishing was carried out using pad-dry-cure method. Cotton fabric was characterized by measuring scanning electron microscope (SEM), X-ray diffraction (XRD), UPF ratting and antibacterial properties. Finished cotton fabric exhibits very good antibacterial properties against Gram positive and Gram negative bacteria which increased with increasing the composite concentration and also has a good UV protection which increased with increasing the temperature of curing.
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...
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.
Nano-Structures & Nano-Objects, 2017
The present work is related with the fabrication of chitosan nanoparticles (CsNPs) by using ionic gelation method. The nanoparticles fabrication under gone the interaction of chitosan and sodium tripolyphosphate in acidic medium. Hence prepared CsNPs were characterized for their size, potential and morphologies by using advanced analytical techniques. The CsNPs were then applied on cotton fabric utilizing pad-dry-cure strategy. The nanofinish recipe was optimized under a Taguchi approach whereas the responses included fabric tensile strength, crease recovery angle, bending length, absorbency time and antibacterial activity against spectrum bacterial strains. The minimum average particle size was observed as 115 nm and maximum zeta potential as +31.3 mV at 0.2% (w/v) chitosan. Scanning electron microscopy equipped with EDX confirmed the presence of CsNPs on the treated fabric. The treated fabrics exhibited good and durable antibacterial activities with acceptable textile properties.
Polymer Bulletin, 2021
End-of-life textile recycling presents a real economic and environmental challenge. From a circular economy perspective, we attempt to evaluate the chitosan-ZnO nanocomposite efficiency in the recycling of cotton-used fabric, accompanied by the electroanalytic and the optoelectronic investigation of the resulting nanocomposites. For comparison, the precipitation and the sonochemical pathways were used as in situ treatment methods. The effect of chitosan characteristics on the antibacterial sustainability of the treated fabrics and the properties of the resulting nanocomposites were studied. The chemical bonding, crystal structure, morphology, optical and optoelectronic properties, intermolecular interactions and antibacterial properties of the resulting free nanocomposites were investigated. The treated used fabrics were characterized by Fourier-transform infrared spectroscopy and scanning electron microscopy equipped with energy-dispersive X-ray spectroscopy before and after 20 washes. Density functional theory study and atoms in molecules analysis of cellulose-nanocomposite interaction were carried out. The results indicate an effective dose of 2 mg against tested bacteria for all the nanocomposites. The nanocomposites have an orange-red emission with no Zn defects and large oscillator strength (ƒ) values. Medium molecular weight chitosan-based nanocomposites showed more intense orange-red emission and higher ƒ values. Sustainable antibacterial properties of treated fabrics are generated with high molecular weight chitosan-based nanocomposites. More than 83% of the antibacterial activity is retained after 20 washes. The theoretical study confirms the stability of the free nanocomposite (chitosan-ZnO) and its destabilization by contacting the fabric when ZnO is a rod shaped, which generates its growth-promoting.
Rasayan Journal of Chemistry
This study aims to conduct the synthesis and characterization of nanohybrid multilayer ZnO-SiO2/Chitosan (NHMZnO-SiO2/Chitosan) using SEM and TEM to show the rod-shape morphology. Furthermore, the compound is used as a textile fiber coating material for anti-bacterial and UV-protected applications. The process was followed by hydrophobization of Dodecyltrietoxysilane (DTS) using a 1,2,3,4-butane tetracarboxylic acid (BTCA) crosslinker. FT-IR showed that the coating of NHM-ZnO-SiO2/Chitosan on textile fibers has covalent ester interactions with the appearance of the C=O stretching functional group at ~1700 cm-1 and each cotton fabric provided different intensity. Meanwhile, SEM showed that the layer has a rough surface, which is associated with the distribution of NHM-ZnOSiO2/Chitosan to create a hydrophobic surface, as evidenced by the water contact angle WCA = 100-119o. Furthermore, UV-DRS analysis was also conducted for UV protection testing and a decrease in the value of Eg = 2.8...