In this study, we aim to obtain biomaterials with antibacterial properties by combining poly(vinyl alcohol) the extracts obtained from various selected plants Romania. Natural herbal of freshly picked flowers lavender plant (Lavandula angustifolia) and leaves peppermint (Mentha piperita), hemp (Cannabis sativa L.), verbena (Verbena officinalis) sage (Salvia officinalis folium) were after an intensive analyzing diverse medicinal often used as healing agents country flora. The characterized...

The main strategy of this study was to combine the traditional perspective using medicinal extracts with polymeric scaffolds manufactured by an engineering approach fabricate a potential dressing product antimicrobial properties. Thus, chitosan-based membranes containing S. officinalis and H. perforatum were developed their suitability as novel materials investigated. morphology films assessed scanning electron microscopy (SEM) chemical structure characterization performed via Fourier...

This study investigated silicone composites with distributed boron nitride platelets and carbon microfibers that are oriented electrically. The process involved homogenizing dispersing nano/microparticles in the liquid polymer, aligning particles DC AC electric fields, curing composite IR radiation to trap within chains. innovative concept utilized two fields align particles, improving even distribution of among BN Based on SEM images, chains uniformly surface sample, fully formed mature,...

Polyether urethane (PU)-based magnetic composite materials, containing different types and concentrations of iron oxide nanostructures (Fe2O3 Fe3O4), were prepared investigated as a novel platform that could be explored in applications, especially for the improvement image quality MRI investigations. Firstly, PU structure was synthetized by means polyaddition reaction then hematite (Fe2O3) magnetite (Fe3O4) nanoparticles added to matrices prepare nanocomposites. The type amount influenced...

The current study focuses on the application of cytotoxicity tests upon one membrane matrix based electrospun polyimide fibers, appealing for biomedical application, such as scaffolds cell growth, patches or meshes wound healing, etc. Assays were performed in order to determine viability and proliferation L929 murine fibroblasts after they kept direct contact with studied fibers. Increased detected cells seeded fibers membrane, comparison control system, either two six days evaluation....

Composite hydrogels based on pullulan (HP) and poly(vinyl alcohol) (PVA) were both prepared by simple chemical crosslinking with sodium trimethaphosphate (STMP) or dual (simultaneously STMP physical freeze-thaw technique). The resulting cryogels designed for tissue engineering applications. PVA, two different molecular weights (47,000 125,000 g/mol; PVA47 PVA125, respectively), as well P/PVA weight ratios tested. physico-chemical characterization of the was performed FTIR spectroscopy...

The majority of recent studies have focused on obtaining MRI materials for internal use. However, this study focuses a straightforward method preparing gelatin-based with iron oxide nanoparticles (G-Fe2O3 and G-Fe3O4) external newly obtained must be precisely tuned to match the requirements usage situation because they will in close touch human/animal skin. biocompatible structures formed by gelatin, tannic acid, were investigated using FTIR spectroscopy, SEM-EDAX analysis, contact angle...

Experimental results are presented on the generation and dynamics of concentric as well non-concentric multiple double layers in hot filament type discharge plasma. These emphasize striking similarities between both types layers, i.e. similar potential steps corresponding to ionization energy used gas, hysteresis cycles current–voltage characteristic exciting electrode, dynamic behaviour, etc. The show that a common physical mechanism is at origin phenomena, which electron-neutral impact...

Abstract This study investigates structural and adsorption properties of the powdered waste shells Rapana gastropod their use as a new cheap adsorbent to remove reactive dye Brilliant Red HE‐3B from aqueous solutions under batch conditions. For powder characterization, solubility tests in acidic X‐ray diffraction (XRD), scanning electron microscopy (SEM), energy‐dispersive spectroscopy (EDX), Fourier transform IR (FT‐IR) thermogravimetric analyses were performed. The results revealed that...

Bio-based compounds are a leading direction in the context of increased demand for these materials due to numerous advantages associated with their use over conventional materials, which hardly degrade environment. At same time, essential oils and components is generated mainly by finding alternative solutions antibiotics synthetic preservatives bioactive characteristics, but also synergistic capacity during manifestation different biological properties. The present study devoted...

This study presents the synthesis and characterization of polyimide (PI-2) films incorporated with spirulina powder for potential biomedical applications. The PI-2 was achieved through a two-step polycondensation reaction using N-methyl-2-pyrrolidone (NMP) as solvent. incorporation systematically varied to investigate its effects on structural surface properties hybrid materials. Scanning electron microscopy revealed tightly bound interface between matrix, indicating effective dispersion...

This paper reports on biofunctionalisation of a poly(lactic acid) (PLA) film by surface activation through cold plasma treatment followed coating with chitosan-gelatin xerogel. The UV cross-linking the xerogel precursor was simultaneously performed fixation onto PLA support. has strong effect properties, in terms wettability, free energy, morphology and micromechanical features. hydrophilic - hydrophobic character surface, determined contact angle measurements, tuned along process, passing...

The present study is concerned with the assessment of relative resistance a monumental dolomitic limestone (Laspra – Spain) used as building material in stone monuments and submitted to artificial ageing by SO2 dry deposition presence humidity. To investigate protection efficiency different polymeric coatings, three commercially available siloxane-based oligomers (Lotexan-N, Silres BS 290 Tegosivin HL 100) newly synthesized hybrid nanocomposite silsesquioxane units (TMSPMA) were used. A...

A series of nanofibrous composite mats based on polyurethane urea siloxane (PUUS), hydroxypropyl cellulose (HPC) and β-cyclodextrin (β-CD) was prepared using electrospinning technique. PUUS synthesized by two steps solution polymerization procedure from polytetramethylene ether glycol (PTMEG), dimethylol propionic acid (DMPA), 4,4′-diphenylmethane diisocyanate (MDI) 1,3-bis-(3-aminopropyl) tetramethyldisiloxane (BATD) as chain extender. Then, the composites were blending with HPC or βCD in a...

Electrospinning is a widely used technology for obtaining nanofibers from synthetic and natural polymers. In this study, electrospun mats collagen (C), polyethylene terephthalate (PET) blend of the two (C-PET) were prepared stabilized through cross-linking process. The aim research was to prepare characterize nanofiber structure by Fourier-transform infrared with attenuated total reflectance spectroscopy (FTIR-ATR) in close correlation dynamic vapor sorption (DVS). studies indicated that...

In this paper, hydroalcoholic solutions of Thymus vulgaris, Salvia officinalis folium, and Hyperici herba were used in combination with poly (vinyl alcohol) the aim developing novel alcohol)-based nanofiber mats loaded phytotherapeutic agents via electrospinning technique. The chemical structure morphology polymeric nanofibers investigated using Fourier Transform Infrared Spectroscopy (FTIR) Scanning Electron Microscopy (SEM). addition extracts to pure polyvinyl alcohol fibers led changes a...