The structural and physical stability of solid dispersions have not been adequately explored during spray drying manufacturing processes. In this study a wide range of compositions of naproxen/PVP-VA 64 (poly(1-vinylpyrrolidone-co-vinyl acetate)) and miconazole/PVP-VA 64 solid dispersions prepared by different laboratory spray dryers were collected from various selected locations and used to in...

Modification of the surface layer of polyurethane with plasma-immersion ion implantation (PIII) and studying its physical and chemical changes have been discussed in this paper. The goal of the research was to obtain carbonized layer allowing creating biocompatible polyurethane implants. The experiments of PIII treatment in various modes were performed. The investigation of the modified surface...

When it comes to personal items like condoms, it?s definitely a different-strokes-for-differentfolks kind of situation. Generally, polyurethane condoms are recommended as an alternative barrier method for people who have known latex allergies [2] and can?t use latex condoms. While the warning labels may be a little bit confusing (more on this later), this non-latex alternative has been shown to...

BACKGROUND Biodegradable polyurethanes have found widespread use in soft tissue engineering due to their suitable mechanical properties and biocompatibility. METHODS In this study, polyurethane samples were synthesized from polycaprolactone, hexamethylene diisocyanate, and a copolymer of 1,4-butanediol as a chain extender. Polyurethane scaffolds were fabricated by a combination of liquid-liqu...

The following paper introduces the problem of noninvasive pressure measurements in Polish artificial heart prosthesis. The pressure sensor is proposed and introduced, and preliminary tests are shown. The paper deals with the proposed sensing elements, requirement noninvasive solution and preliminary tests of polyurethane membrane transmission. The paper includes also experimental results of a f...

Table S1. Host materials and references for Figure 5 in the main text. Reference numbers are those used in the main text. Filler material Host material Reference SWNT PDMS [15] SWNT epoxy [18] SWNT polystyrene [14] SWNT PEDOT-PSS [21] MWNT PDMS [3] MWNT epoxy [17] MWNT polystyrene [11] MWNT polyurethane-urea [10] EG polystyrene [12] EG NBR [5] silver particles PDMS [1] CB polystyrene [16] CB po...

This paper presents an EM analysis of dispersions & discontinuities in a microstrip transmission lines. Dispersion characteristics of a microstrip lines are investigated by the existing models for study of microstrip lines and then compare the results with Software Simulation. Dispersions on microstrip lines with characteristics impedance 50Ω are investigated for the frequency range 1 to 18 GHz...

Dispersions of isolated single wall carbon nanotubes (SWNTs) in pure organic solvents can usually be prepared only at low concentrations (∼0.01-0.02 g/L). Here, we use poly(vinylpyrrolidone) as a dispersant for unfunctionalized SWNTs in N-methyl-2-pyrrolidone and achieve concentrations of up to ∼0.16 g/L. Such dispersions remain stable by visual inspection for at least 1 year after preparation....

We systematically study the properties of dispersions of iron-based colloids synthesized in a broad size range by thermal decomposition of ironcarbonyl using different stabilizing surfactants. The synthesis results in stable dispersions of monodomain magnetic colloids. Our particles appear to consist of an amorphous Fe(0.75)C(0.25) alloy. Sizes of particles coated with modified polyisobutene or...

In this work, different sizing agent aqueous dispersions based on polyetherimide (PEI) were elaborated in order to improve the interface between carbon fibers and a thermoplastic matrix (PEEK). The dispersions were obtained by the emulsion/solvent evaporation technique. To optimize the stability and the film formation on the fibers, two surfactants were tested at different concentrations, with ...