The goal of this study was to create polydimethylsiloxane (PDMS) and microcrystalline cellulose (MCC) composites with high mechanical properties antimicrobial activity. Vinyl-terminated PDMS mixed bifunctional filler, which combines MCC stiffness silver nanoparticles. To provide the nanoparticles in situ were synthesized by chemical reducing method aqueous suspension. Silver (AgNPs) concentration deposited on particles surface varied. morphology, activity PDMS/MCC their components have been...

A cost-effective solution for the synthesis of high-porosity TiO2 aerogels, which can be used as a mesoporous perovskite network charge-carrier material during manufacture solar cells, is described. The effects parameters (precursor (titanium (IV) isopropoxide (TIP) and tetrabutyl orthotitanate (TBOT)), additional solvent exchange (n-hexane (nH), cyclohexane (CH), diethyl ether (DE)), subcritical drying (800 mbar vacuum, 70 °C, 8 h), aging, calcination on aerogel's structure have been...

Electrospun mats from nano/micro-fibers with control porosity and pore shape may be ideal candidate for tissue engineering scaffolds. In this study three type of poly(vinyl alcohol) (PVA) 48-65 µm thickness different diameters mostly 100-200 nm were deposited by electrospinning process. Controlled density in the electrospun was introduced Yb:KGW femtosecond laser micromachining system. The influence mat micro structure, distance between adjacent ablation points, number pulses on quality...

The aim of this investigation was to synthesize high porosity TiO2 aerogel by applying sol-gel and subcritical drying methods identify the influence reagent’s nature synthesis conditions on their structural optical properties. Methods XRD, FT-IR, BET, STA, SEM, UV-vis were applied investigate compare properties synthesized aerogels determine most effective route. parameters materials can be varied changing precursor type (titanium (IV), isopropoxide (TIP), or tetrabutylorthotitanate (TBOT))...

The aim of this research was to determine the influence pulsed CO 2 laser treatment on crust leather surface morphology and wettability. obtained results revealed that engraving can be used as an effective tool for treatment. Pulsed only negligible affects macrostructure leather, while wetting after were changed. It found increase pulses number increases initial water contact angle value intensifies droplet relaxation process. After treatment, rate twofold compare those untreated leather....

Abstract The relationship between statistical characteristics of butadiene styrene rubber (BSR) surface roughness and shear strength adhesive joints has been investigated. assumption stationary normal distribution coordinates points was made to determine the roughness. profile length above selected level l 1 (u) introduced as a new parameter characterize penetration depth. validity simulated value verified experimentally. A good correlation experimental calculated results found. depth...

Rheology and wetting properties of commercial water-born dispersion the copolymer vinyl ester a synthetic saturated monocarboxylic acid acrylate, obtained by emulsion polymerization, have been investigated.For composition modification, 0.8 phr dibutylglycol as plasticizer from 0 to 10 TiO 2 Al O 3 particles filler were added.It has shown that behaviour under shear between two coaxially placed cylinders depends not only on composition, but rate well.At low rates (up 40 s -1 ), an increase...

Surface topography, hardness and microstructure of nickel coatings electrodeposited on Si master with a periodical structure have been studied depending vacuum deposited sublayer material (Ni, Cu or Ag). It is shown that the quality replication silicon in shim simultaneously different sublayers dependent used. All types analyzed enabled transfer lateral dimensions showed good tested structures (2 μm period), while replicated using Ni exhibited worst roughness. The layers was found to be used...

The goal of this investigation was to find out influence heat treatment at low temperatures on the Lithuanian spruce wood bending strength. heating temperature and duration strength during statical has been investigated. tests were carried using samples with size 20 ´ mm in cross-section 300 length. Density varied from 460 up 500 kg/m3. heated conditions close those used manufacturing process. Temperature equal T = 60, 80, 100 120 °C selected t 24, 48, 72 96hours. obtained results reveal...

Background In the literature, misfit of implant-supported restoration 100 μm or less is often considered as clinically acceptable. The conventional and digital workflow inevitably involves reconnection impression components Ti bases to analogs implants. Moreover, position could depend on torque level. positional inaccuracies these can influence overall accuracy potentially lead technical biologic complications. Aim/Hypothesis aim this study was evaluate repositioning errors implant...

The aim of this investigation was to evaluate the ability predict roughened surface area soft polymeric materials using machine learning method. Random forest and extremely random methods have been applied monolithic butadiene styrene rubber based on grain diameter abrasive paper. It found that there is a very strong negative correlation between roughness (the Pearson coefficient equal - 0.83 Spearman 0.91). statistics Shapiro-Wilk criteria confirmed independently grain, lengths profiles are...