A5025249448- Dyeing and Modifying Textile Fibers
- Textile materials and evaluations
- Nanoparticles: synthesis and applications
- Advanced Photocatalysis Techniques
- Surface Modification and Superhydrophobicity
- Additive Manufacturing and 3D Printing Technologies
- Pigment Synthesis and Properties
- Advanced oxidation water treatment
- Skin Protection and Aging
- Advanced Nanomaterials in Catalysis
- Natural Fiber Reinforced Composites
- Iron oxide chemistry and applications
- Medical and Biological Ozone Research
- Augmented Reality Applications
- Polymer Nanocomposites and Properties
- Antimicrobial agents and applications
- Material Properties and Applications
- Laser-Ablation Synthesis of Nanoparticles
- Healthcare, Law, Governance, and Management Studies
- Flame retardant materials and properties
- Bacterial biofilms and quorum sensing
- Copper-based nanomaterials and applications
- Ionic liquids properties and applications
- Silk-based biomaterials and applications
- Advanced Cellulose Research Studies
Riga Technical University
2014-2024
In the current study, antibacterial activity of positively and negatively charged spherical hematite (α-Fe2O3) nanoparticles (NPs) with primary size 45 70 nm was evaluated against clinically relevant bacteria Escherichia coli (gram-negative) Staphylococcus aureus (gram-positive) as well naturally bioluminescent Vibrio fischeri (an ecotoxicological model organism). α-Fe2O3 NPs were synthesized using a simple green hydrothermal method surface charge altered via citrate coating. To minimize...
CeO 2 /CuO primary antimicrobial mechanism was high ROS production, resulting in faster and stronger activity than CuO. It showed low cytotoxicity to human keratinocytes vitro no acute toxicity the bacterium Vibrio fischeri .
Copper and chitosan are used for biomedical applications due to their antimicrobial properties. In this study, a facile method the synthesis of chitosan-copper oxide nanocomposites (nCuO-CSs) was modified, yielding stable colloidal nCuO-CSs suspensions. Using method, with different copper-to-chitosan (50-190 kDa) weight ratios (1:0.3, 1:1, 1:3) were synthesized, physicochemical properties characterized, antibacterial efficacy assessed against Gram-negative
In this research pure cotton textile was successfully modified by zinc oxide nanosol prepared the sol-gel method. The fabric dipped in solution for 10 minutes, dried at 90 °C minutes with further thermal post-treatment 120 °C, 140 or 160 2 minutes. Comparison of coating samples using different post-treatments made. Before and after laundering tests ultraviolet protective properties were determined according to standards, results show that textiles treatment have excellent protection...
This paper reports about cotton textile modification by sol-gel technology with the purpose of obtaining antibacterial properties, evaluation properties and dermal toxicity tests Zn Si coating. Antibacterial against pathogenic microorganisms Pseudomonas aeruginosa, Staphylococcus aureus, Escherichia coli made using Parallel streak method in accordance ATCC147 standard. For more specific coated textile, vitro cytotoxicity test epidermal HaCat cells was done. It is concluded that coatings...
One of the main tasks research is to impact additional value on natural textiles by adding them ultraviolet (UV) absorption and antimicrobial protection properties with ZnO nano-level coatings. shows high in UV region light spectrum, comparison organic absorbers conventionally used textile industry no significant degradation, stable classified as non-toxic material. Nanosols were prepared using sol-gel process. In this work samples coated nanosols zinc acetate (Zn (CH3COO)2-2H2O) sulphate...
When particles are mixed in polymer, particle surfaces become passivated by polymer matrix, leading to significantly reduced photocatalytic and, thus, also antibacterial activity, as the catalytic isolated from outer environment and microorganisms reaching surface. Herein, we demonstrate a facile rapid approach for coating preparation at room temperature, yielding good adhesion of combination with particles' interface location. Flexible ethylene-co-vinyl acetate Ag/AgCl/α-Fe2O3 composite...
The hematite photo-Fenton catalysis has attracted increasing attention because it offers strong oxidation of organic pollutants under visible light at neutral pH. In the present work, aqueous synthesis catalysts with high activity is demonstrated. We compare for obtained by hydrolyzation 60 °C or a thermally induced transformation from iron-bearing nanoparticles, such as amorphous iron oxyhydroxide goethite. A link between their structure and reactivity established. highest was observed...
Comparison of the antimicrobial properties textiles with amorphous coatings containing Zn and Si obtained by sol-gel technology against microorganisms Pseudomonas fluorescens , Saccharomyces cerevisae Trichoderma viride that can cause cotton textile destruction was made. Modified were evaluated using scanning electron microscopy, energy dispersive x-ray spectroscopy. Investigation fabric samples treated different zinc acetate dihydrate concentration sols various thermal post-treatments...
The surface of cotton textile was modified to create a water-repellent finishing by depositing modifying coatings using the sol-gel technique. Treated textiles evaluated scanning electron microscopy, X-Ray powder diffraction (XRD). wettability treated fabrics characterized water contact angle and drop test. results showed that with 7.5 wt.% zinc acetate dihydrate sol excellent hydrophobic properties, could reach 145°C without decreasing after 50 hydrothermal treatment cycles.
Abstract Water disinfection is a crucial challenge for humanity. Approaches that are effective, cheap, environmentally friendly, and do not promote gene exchange between bacteria urgently required. Strongly oxidizing radicals highly promising to achieve this as they lead bacterial activation at high efficiencies. However, sources consistently generate these limited energy UV/H 2 O treatments requiring large input. Here the use of abundant, brownmillerite (Ca Fe 5 ) demonstrated an efficient...
AbstractIn this research, pure cotton textile was modified by the sol-gel technology with low thermal post-treatment temperatures: drying at 90 °C for 10 min after curing 120, 140 and 160 2 min. The impact of coating technology, different temperatures multiple washing cycles to adhesion coating, air permeability abrasion resistance were studied. morphology changes surface before evaluated scanning electron microscopy. treatment can impart antibacterial properties against Pseudomonas...
One of the main tasks presented research are to impact additional value on natural fabrics by adding them new properties with a metal nano-level coating, evaluate coating technologies. Having ability control surface fiber offers great rewards that go far beyond pure economics as fibers renewable and biodegradable. The paper describes process vacuum evaporation magnetron sputtering copper coatings cotton textile materials, analysis coated laser laboratory complex SEM. investigation results...
The present study evaluates the influence of low-pressure air plasma before vacuum evaporation process on cotton textile surface morphology, as well evaporated copper coating adhesion. During experiment, commercial was functionalized with technique or without low– pressure pre-treatment. Surface analysis treated and carried out using Scanning electron microscope. As shown in experimental results, modification by applying noticeably deteriorates adhesion to substrate. These can be explained...
This article reviews efficiency of the fluorine, silica and zinc compounds containing textile coating conformity with day-to-day wearing conditions cotton knitwear used as first level clothing to wearer skin. Silica sol modified acetate dehydrate was for weft knitted single-jersey double-jersey fabrics chemical modification. The experimental part presented research includes evaluation structure characteristics, air vapour permeability water-repellent abilities. wettability textiles were...
A variety of applications requires production textile materials with specially designed surface properties. Surface coating by metallic have attracted a lot attention due to their special properties, such as UV-absorbsion, antimicrobial, anti-fungicidal and ect. The paper describes the process vacuum evaporation magnetron sputtering copper layers on cotton analysis metal coated morphology laser laboratory complex. samples been finished technologies tested for bonding strength, light...