A5084553772- Surface Modification and Superhydrophobicity
- Hydrogels: synthesis, properties, applications
- Electrospun Nanofibers in Biomedical Applications
- 3D Printing in Biomedical Research
- Surfactants and Colloidal Systems
- Chemical and Physical Properties in Aqueous Solutions
- Polymer Surface Interaction Studies
- Adhesion, Friction, and Surface Interactions
- Additive Manufacturing and 3D Printing Technologies
- Spectroscopy and Quantum Chemical Studies
- Thermodynamic properties of mixtures
- Silk-based biomaterials and applications
- Innovative Microfluidic and Catalytic Techniques Innovation
- Electrohydrodynamics and Fluid Dynamics
- Diffusion Coefficients in Liquids
- Proteoglycans and glycosaminoglycans research
- Civil and Geotechnical Engineering Research
- Particle Dynamics in Fluid Flows
- Material Properties and Applications
- Plant Physiology and Cultivation Studies
- Cellular Mechanics and Interactions
- Polysaccharides and Plant Cell Walls
- Advanced Materials and Mechanics
- Recycling and Waste Management Techniques
- Microfluidic and Capillary Electrophoresis Applications
Tomas Bata University in Zlín
2017-2024
Masaryk University
2016
Stable antimicrobial nisin layers were prepared on the carrying medium-polyvinyl alcohol (PVA) films, crosslinked by glutaric acid. Surface plasma dielectric coplanar surface barrier discharge (DCSBD) modification of polyvinyl was used to improve hydrophilic properties and provide better adhesion biologically active peptide-nisin polymer. The films studied in correlation their cross-linking degree. Nisin attached directly from salt solution commercial product. In order achieve a stable...
Magneto-responsive soft hydrogels are used for a number of biomedical applications, e.g., magnetic hyperthermia, drug delivery, tissue engineering, and neuromodulation. In this work, type hydrogel has been fabricated from hyaluronan (HA) filled with binary system Al2O3 nanoparticles multicore particles (MCPs), which were obtained by clustering superparamagnetic iron oxide FeOx NPs. It was established that the presence diamagnetic several positive effects: it enhances storage modulus...
The ways of producing porous-like textured surfaces with chemical etching on aluminum-alloy substrates were studied. most appropriate etchants, their combination, temperature, and time period explored. influence a specifically surface adhesive joints’ strength or superhydrophobic properties was evaluated. samples examined scanning electron microscopy, profilometry, atomic force goniometry, tensile testing. It found that, the multistep process, substrate can be effectively modified to same...
Smart hydrogels based on natural polymers present an opportunity to fabricate responsive scaffolds that provide immediate and reversible reaction a given stimulus. Modulation of mechanical characteristics is especially interesting in myocyte cultivation, can be achieved by magnetically controlled stiffening. Here, hyaluronan with carbonyl iron particles as magnetic filler are prepared low-toxicity process. Desired behaviour using combination two cross-linking routes-dynamic Schiff base...
Dynamic light scattering (DLS), viscosity and surface tension (SFT) measurements were used to characterize influence of salts containing ions Hofmeister series (Na2SO4, (NH4)2SO4, NaSCN, NH4SCN NaCl) on the behaviour hyaluronan in diluted solutions at a temperature range 15-45 °C. The results study showed that chaotropic kosmotropic notably influenced folding unfolding coils due interactions between respective ion hydrophilic or hydrophobic patches present backbone polymer chains. This was...
Essential features of well-designed materials intended for 3D bioprinting via microextrusion are the appropriate rheological behavior and cell-friendly environment. Despite rapid development, few utilizable as bioinks. The aim our work was to design a novel cytocompatible material facilitating extrusion-based printing while maintaining relatively simple straightforward preparation process without need harsh chemicals or radiation. Specifically, hydrogels were prepared from gelatines coming...
The nanotexturing of microstructured polystyrene surfaces through CF4 plasma chemical fluorination is presented in this study. It demonstrated that the parameters a surface micropore-generation process, together with setup subsequent plasma-chemical modifications, allows for creation long-term (weeks) surface-stable micro- and nanotexture high hydrophobicity (water contact angle >150°). Surface micropores were generated initially via time-sequenced dosing mixed solvents onto (Petri dish)...
In the current study, we present methods of sodium hyaluronate, also denoted as hyaluronan (HA), nanofiber fabrication using a direct-current (DC) electric field. HA was spun in combination with poly(vinyl alcohol) (PVA) and polyethylene oxide (PEO) pure polymer. Nonaggressive solvents were used due to possible use fibers life sciences. The influences polymer concentration, average molecular weight (Mw), viscosity, solution surface tension analyzed. PVA fluorescent-labeled order examine...
A combination of mechanical and chemical treatments was utilized to modify the surface textures copper duralumin inserts in order enhance adhesion at metal-polymer interface provide an adhesive joint with a high loadbearing capacity. Pretreatment surfaces sandblasting followed by etching various mixtures. The resulting were evaluated scanning electron microscope (SEM) optical confocal microscope. Surface geometry parameters (Sa, Sz, Sdr) measured their relationships strength studied. It...
Knowledge of mass transport parameters, diffusion, and viscosity hyaluronic acid (HA) in the presence cyclodextrins is considerable importance for areas such as food packaging drug delivery, among others. Despite a number studies investigating functionalization HA or corresponding sodium salt by cyclodextrins, only few have reported effect on these oligosaccharides. Here, we report tracer binary ternary interdiffusion coefficients hyaluronate (NaHy) water aqueous β-cyclodextrin solutions....
Abstract Bio-inspired conductive scaffolds composed of sodium hyaluronate containing a colloidal dispersion water-miscible polyaniline or polypyrrole particles (concentrations 0.108, 0.054 and 0.036% w/w) were manufactured. For this purpose, either crosslinking with N -(3-dimethylaminopropyl- -ethylcarbodiimide hydrochloride -hydroxysuccinimid freeze-thawing process in the presence poly(vinylalcohol) was used. The comprised interconnected pores prevailing porosity values ~ 30% pore sizes...
Tracer diffusion coefficients obtained from the Taylor dispersion technique at 25.0 °C were measured to study influence of sodium, ammonium and magnesium salts 0.01 0.1 mol dm−3 on transport behavior sodium hyaluronate (NaHy, 0.1%). The selection these was based their position in Hofmeister series, which describe specific different ions (cations anions) some physicochemical properties a system that can be interpreted as salting-in or salting-out effect. In our case, general, an increase...
Nanofibrous composite membranes were prepared by the elecrospinning process of poly(vinyl butyral) (PVB) solution that contained hydrophobic silica nanoparticles (SiO2). Various surface modifications have been used to improve waterproofing capacity membrane. Specifically, investigation was made into effects rheological properties solution, as well on fibre diameter exerted applied voltage and tip-to-collector distance. It found drastically increasing shear viscosity elasticity with...
This work explores application of phase separation phenomena for structuring films made from hyaluronan. A time-sequenced dispensing different solution mixtures was applied under rotation hyaluronan-covered substrates to generate surface textures. method is applicable in direct modification or cover layer deposition. Changes the topography were characterized by atomic force microscopy, optical and contact non-contact profilometry. The mechanical properties surface-modified self-supporting...
Mutual diffusion coefficients of chloroquine diphosphate (CDP) in aqueous solutions both without and with β-cyclodextrin (β-CD) were measured at concentrations from (0.0000 to 0.0100) mol dm−3 298.15 K, using the Taylor dispersion technique. Ternary mutual (Dik) by same technique are reported for CDP + β-CD K. The presence β CD led relevant changes process, as showed nonzero values cross-diffusion coefficients, D12 D21. concentration gradients produced significant co-current coupled flows...
The use of polymers for water storage or distribution is closely monitored, especially with regard to the possible contamination substances coming from material's surfaces. Different standards are practiced across countries according type applied materials and such test methods prevalently based on constant temperature conditions. However, these systems could be located in diverse environment which does not necessarily provide Experimental findings show that exposure liquid inside polymeric...