Silver Nanoparticle-Based Finishing for Leather Antimicrobial and UV Protection.

Rational strategy for construction of multifunctional coatings for achieving high fire safety, antibacterial, UV protection and electrical conductivity functions of textile fabrics

New nanocomposite design from zeolite and poly(lactic acid)

This work deals about polymer-metal nano-composites. Polymers are utilized in the synthesis of metal nanoparticles, metal-nanofluids and thin film with metal nanoparticles. In these synthesis processes, polymers are holding the roles like reducing agent, capping agent and suspending agent. Polymers can be used as a substrate or binder for metal-nanoparticles. Polymers encapsulated metal nanoparticles are the promising material for the applications such as solar cells, conductivity improved electronic circuits, sensors and biosensors particularly for sensing of viruses and cancer molecules. This work has reviewed about the processing and various applications of polymer-metal nano-composites. When copper/silver nanoparticles are incorporated into polymers such as poly(vinylalcohol) improvement in antibacterial properties can be expected. In addition, electrical conductivity is increased when these composites materials are synthesized and formed as nanofibres by electro-spinning technique. The reviewed patents of polymer-metal nano-composites show the growth status and scope. The analyzed trends reveal the challenges and sustainable future of this field.

Polymethylhydrosiloxane and ZIF-8/color nanoparticles enhanced the UV-resistance, antibacterial and hydrophobicity performance of cotton fabrics

In this work, after cationic pretreatment of cotton fabric with cetylpyridinium chloride (CPC), the compound of citric acid (CA) and succinic acid (SUA) were used as crosslinking agents to dye cotton fabrics with natural madder dye to improve the dyeing and antibacterial properties and realise the multifunctional finishing of cotton fabric. The effects of mordant dyeing, CA + SUA crosslinked dyeing, and CPC/CA + SUA crosslinked dyeing on the microstructure and properties of cotton fabrics were compared. The dyeing by the three processes occurred primarily in the amorphous zone of the fibres, and all kept the original crystalline form of the cotton. CA + SUA crosslinked dyeing and CPC/CA + SUA crosslinked dyeing increased the thermal stability of the cotton fabric. CPC/CA + SUA crosslinked dyed cotton obtained excellent dyeing results with the colour depth value (K/S) of 12.3 and rubbing fastness and washing fastness of levels 4–5, and the levelness and dye permeability were acceptable. Furthermore, the antibacterial rate against Escherichia coli and Staphylococcus aureus reached 99.99%, and the ultraviolet protection factor (UPF) reached 50+. Moreover, the wrinkle recovery angle (WRA) increased by 55% compared with raw cotton. This showed that CPC/CA + SUA crosslinked dyed cotton had excellent antibacterial, anti‐ultraviolet, and anti‐wrinkle performances.

Purpose This study aims to focus on developing a functional cotton fabric with biosynthesized titanium dioxide nanoparticles (TiO2NPs) using Cucumis maderaspatanus (CM) leaf extracts. This biological approach offers a safer, greener and more cost-effective way to create nanoparticles for textile applications. Design/methodology/approach The research included titanium dioxide nanoparticles (TiO2NPs) synthesis, characterization, namely, phytochemical analysis, UV-Vis spectrophotometer analysis, Fourier transform infrared spectroscopic, X-ray diffraction, particle size, field emission scanning electron microscope and energy dispersive X-ray spectroscopy analysis and application of synthesized nanoparticles onto the cotton fabrics. The functional performance of TiO2NPs-coated cotton fabric was assessed for UV protection property and self-cleaning properties. Findings This study validates the biogenic synthesis of titanium dioxide nanoparticles for functional textile applications, showcasing a 46 % reduction in color when exposed to sunlight, emphasizing the self-cleaning property. The finished cotton fabric also exhibited very good UV protection properties, highlighting its potential for UV protection applications. Originality/value Functionalizing cotton fabric with titanium dioxide (TiO2) nanoparticles enhances its individuality by imparting UV protection, self-cleaning, and antibacterial properties. This nanotechnology-driven modification ensures durability while maintaining breathability and softness. Evaluating functional properties like UV resistance and antimicrobial efficiency highlights its enhanced performance and long-term usability.

An unexampled approach for simultaneous heat setting process with optimized condition at C3 (140°C, 45 s) and functional finishing, i.e. UV protection and antibacterial properties of cotton/spandex fabric were studied in this research. Experimental results disclosed that, ameliorative antibacterial efficacy and perdurable UV protection of heat-treated cotton/spandex fabrics with best sample A3 among all samples was achieved and mechanical properties also improved as the temperature rose from 120 to 140°C. In addition, Ultraviolet (UV) radiation protection and antibacterial properties are becoming increasingly necessary for human health, and textiles play an important role and this report will be appurtenant to meet regular demand.

Zinc oxide (ZnO) nanoparticles were loaded over non-thermal plasma (P1) and citric acid (P2)-functionalized cotton fabrics using a room temperature sonification process. The cotton samples were pretreated with dielectric barrier discharge (DBD) plasma and citric acid to introduce some reactive moieties on the fabric to enhance the adhesion power of ZnO nanoparticles with an average particle size of 41 nm. The nanoparticles were dispersed homogeneously on the surface of the P1 sample, which enhanced the antibacterial, UV protection and photocatalytic self-cleaning characteristics of ZnO-loaded fabric. The self-cleaning efficiency of P1 and P2 samples was measured to be about 77% and 63%, respectively. The inhibition zones of 5.5 mm and 5.4 mm were produced by sample P1 against E. coli and S. aureus bacteria, respectively, which were slightly higher than the inhibition zones produced by sample P2. The inhibition zone of the samples roughly decreased by 17% after performing 10 wash cycles. The unloaded cotton fabric had a UPF value of 70.02 units and blocking percentage of 70.92% and 76.54% for UVA and UVB radiations, respectively. The UVA-blocking capacity of samples P1 and P2 was 95.27% and 91.22, respectively. Similarly, the UVB blocking capacity was 94.11% and 92.65%, respectively. The pre-coating plasma treatment was found to be helpful in improving the UV-blocking ability of ZnO-loaded cotton fabric.

PurposeThis study aims to study the simultaneous treatment of polyethylene terephthalate (PET) fabric with sodium hydroxide (NaOH) and TiO2 nanoparticles (NPs).Design/methodology/approachPET fabrics loaded by TiO2 NPs were investigated by the use of scanning electron microscopy (SEM), energy dispersive X-ray (EDX) and Fourier transformed infrared spectroscopy (FT-IR). Factors affecting the finishing process such as NaOH and TiO2 NPs concentrations, finishing duration and temperature were discussed.FindingsThe finished PET fabrics imparted new properties such as antimicrobial and ultraviolet protection factor protection, what is undoubtedly will increase the spread of this type of fabric and its use in new areas.Research limitations/implicationsThe method used mainly depends on activating the surface of PET fabrics by a chemical method, specifically NaOH to cause partial decomposition, which may lead to an environmental impact.Practical implicationsThe obtained results revealed that the simultaneous treatment of PET fabric with NaOH and TiO2 NPs showed antimicrobial and UV protection properties. They exhibited a strong antimicrobial activity and UV protection efficiency even after five washing cycles, indicating excellent laundering durability.Originality/valueThe approach has simplicity and implementability on an industrial scale without cost investment.

Agricultural waste Ipomoea batatas leaves for low-temperature dyeing and functional finishing of polyester fabrics

Polyvinyl alcohol-based nanocomposite film reinforced with green nanocellulose and silver nanoparticles: structure, properties, and potential applications in food preservation.

The peculiarities of the technology of hybrid modification of lignite humic acids of biodegradable films based on hydroxypropylmethylcellulose are considered. As a result of the conducted research, hybrid biodegradable films with antibacterial properties were obtained for the first time. Hydroxypropylmethylcellulose of the Walocel brand was used for the production of biodegradable films, and citric acid (99.88%) according to GOST 3652 is used as a catalyst for crosslinking biodegradable polymer films. As part of the research, the hybrid structures of hydroxypropylmethylcellulose modified with different types of humic acids were actually determined by IR spectroscopy. As a result of the study, the regularities of changes in the time of appearance of mold of films within the framework of the technology of hybrid modification with lignite humic acids were established. It was also established that the technology of hybrid modification of hydroxypropylmethylcellulose films with humic acids of lignite and giving them antibacterial properties allows to preserve the properties of biodegradation. It was established that the technology of hybrid modification of hydroxypropylmethylcellulose with lignite humic acids of biodegradable hydroxypropylmethylcellulose films with different types of humic acids, while giving them antibacterial properties, allows the biodegradation of films based on them to be at least 91% within 6 months with an optimal humic acid content of 10% by mass. Biodegradable films with bactericidal properties based on hydroxypropylmethylcellulose, obtained according to the technology of hybrid modification with humic acids of lignite, in terms of their operational characteristics, are superior to known similar biodegradable films based on natural biopolymers and can be recommended for the manufacture of packaging of dry food products (bread, cereals, nuts, etc.) with an extended storage period.

Design of multifunctional food packaging films based on carboxymethyl chitosan/polyvinyl alcohol crosslinked network by using citric acid as crosslinker

Silver nanoparticles (AgNPs) are capable of inhibiting the growth of a broad spectrum of bacterial species. The minute size of the nanoparticulates enhances their biocidal activity and is thus widely utilized as antibacterial agents. The most recently researched and recognized antibacterial and wound-healing properties of published AgNPs were investigated in this article. The following parameters of the AgNPs affecting their properties and potency were explored: particle size, shape, and type of ligand or stabilizing agent. Research regarding the antibacterial activity enhancement of high-valent silver nanoparticles compared to those of the lower valent forms were summarized and analyzed. Nanocrystalline silver is capable of binding to components that may enhance their preparation and antibacterial properties. By forming complexes with ligands that exhibit desired properties, silver nanoparticles can be synthesized to exhibit those desired properties without compromising their performance. This review will provide a detailed discussion regarding the parameter-dependent bactericidal properties of silver nanoparticles and nanocomposite silver complexes as potent multifunctional wound-healing agents.

Herbal extract application on textile substrates is in great demand around the globe. In this study, a natural dye extracted from Lantana camara L. leaves' extract was tested to assess the ultra-violet protective properties on cotton fabric using direct dip dyeing technique. Extraction of phytochemicals was carried out using ethanol and aqueous solvents. Total phenolic content (TPC) quantification revealed that TPC of L. camara leaves* extracts were highest in ethanolic extraction as compared to aqueous extracts. The ultra violet protection factor (UVF) values ranged between good to excellent for the cotton fabrics. A cotton fabric treated in a solution containing cross linking agent showed a shade of light yellowish green. The colour fastness against light, washing, rubbing and perspiration of cotton fabric treated in extracted dye solution as well as treated with citric acid as cross-linking agent showed good to very good colour fastness properties (4–5). The results confirmed that natural dye from Lantana camara extract have potential for application in fabric dyeing and also helpful in producing UV protective fabric.