Impregnation of Zinc Oxide Mediated Chitosan Nano-composites on Polyester Fabric for Performance Characteristics (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.
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.
Tailoring of multifunctional cotton fabric by embedding a TiO2+ZnO composite into a chitosan matrix
Tekstilec
The use of nanomaterials to functionalise textiles offers new opportunities for chemical modification of textile fibres’ surfaces to achieve multifunctional protective properties. In this study, novel coatings were tailored on cotton fabric by embedding a mixture of TiO2 and ZnO nanoparticles (NPs) of different molar ratios into a chitosan polymer matrix. The excitation energies of the TiO2+ZnO composites generated in the coatings ranged from 3.20 eV to 3.25 eV, indicating that the photocatalytic performance of the functionalised cotton was driven by UV light. The presence of TiO2+ZnO composites increased the UV protection factor (UPF) of the cotton fabric from 4.2 for the untreated sample to 15–21 for the functionalised samples. The UPF values of the coatings slightly decreased after repeated washing. The ZnO in the TiO2+ZnO composites conferred biocidal activity to the coatings, which were resistant to washing at higher ZnO concentrations. In addition, the TiO2 in the TiO2+ZnO com...
Polymer Bulletin
A green sustainable strategy for biosynthesis of ZnONPs and chitosan nanoparticles (ZnONPs: 20–25 nm and CSNPs: 70–90 nm) has been developed, their potential applications in multifunctional finishing of cotton and viscose fabrics to impart anti-crease, anti-UV and antibacterial functions using citric acid/Na-hypophosphite CA (15 g/L)/SHP (15 g/L), as CH2O-free ester-crosslinking system and the pad-dry-cure method. The obtained results signify that the extent of improvement in the imparted functional properties is governed by type of cellulosic substrate, kind and concentration of nano-additive as well as type of bio-functional additive, namely, L-ascorbic acid or vanillin (20 g/L each). Moreover, the best results show that using CSNPs (2.5 g/L)/ZnONPs (15 g/L), as an eco-friendly two component mixture, brought about an enhancement in both chemical and functional properties of treated substrates which can be ranked as follows: nitrogen content (N%): viscose (1.818) > cotton (1.592...
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 .
RSC Advances, 2015
ZnO and Ag:ZnO nanoparticles were prepared by hydrolysis of zinc acetate in the presence of lithium hydroxide (LiOH). In combination with binders based on hybrid polymer sols, these metal oxide materials were applied for textile treatment. Hybrid coatings based on ZnO, Ag:ZnO/CS, Chitosan (CS), 3-glycidyloxypropyltrimethoxysilane (GPTMS) and tetraethoxysilane (TEOS) prepared by sol-gel method were applied on cotton 100% and cotton/polyester (50/50%) textiles using "pad-dry-cure" technique. The obtained nanoparticles incorporated within chitosan matrix were characterised by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), UV/Vis spectroscopy and field emission scanning electron microscopy (FE-SEM). The antimicrobial activity of Ag/CS, ZnO/CS and Ag:ZnO/CS composite coatings was investigated in comparison to that of the pure chitosan using the paper disc method on Mueller-Hinton agar, against the Gram-negative E. coli and the Gram-positive S. aureus bacteria. For the same composite coatings applied on textile, the antimicrobial activity was investigated by UV /Vis absorption spectroscopy using TTC method, against the bacteria E. coli and M. luteus. The investigated nanocomposite materials showed good antimicrobial activity and are promising materials for use as medical applications.
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...
Polímeros
This study dealt with the fabrication and analysis of poly(lactic acid) (PLA) mediated chitosan nanocomposite. Such a novel nanobiocomposite may get future applications in drug delivery, and nanofinising of textile and polymer surfaces. Herein, this nanocomposite has been considered as an antibacterial finishing agent for a hydrophobic textile fabric like polyester. The prepared nanocomposite was characterized for zeta size and morphology, and subsequently applied on a woven polyester fabric though a coross linker. The treated polyester fabric was analyzed for textile functional characteristics as well asantibacterial activity. The spectral and optical properties demonstrated that the nanocomposite developed exhibited spherical morphologies with a mean nano particle size of ca. 88 nm. The treated fabric projected satisfactory antibacterial and fair fabric attributes. Hence, the nanofinished polyester fabric is a potential biocompatible candidate as medical and antibacterial textiles in addition to be used in antibacterial water filtration and materials packing.
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.