Polyvinylpyrrolidone (PVP) hydrogel coating for cylindrical polyurethane scaffolds

Polyvinylpyrrolidone-polyurethane interpolymer hydrogel coating as a local drug delivery system.

Hydrogels are continuous hydrophilic threedimensional polymeric networks able to swell large amounts of water or aqueous fluid, without dissolution (1, 2). They are extensively exploited in the field of biomedical applications, since the middle of the twentieth century, when the first synthetic hydrogel poly(2-hydroxyethyl methacrylate) (PHEMA), a material for contact lenses, was reported (3). ...

Manufacturing and acoustical characterization of electrospun PolyVinylPyrrolidone (PVP) Blankets

In this work, new light soundproofing fibrous materials were obtained through electrospinning technique. The sound absorbers were obtained in the form of blankets of thin disks of 10 cm diameter, characterized by fibres with a diameter in order of 2 μm. Different activities involved for acoustical characterization of specimens, in particular to the evaluation of the sound absorption coefficient...

Polyurethane/poly(vinyl alcohol) hydrogel coating improves the cytocompatibility of neural electrodes

Neural electrodes, the core component of neural prostheses, are usually encapsulated in polydimethylsiloxane (PDMS). However, PDMS can generate a tissue response after implantation. Based on the physicochemical properties and excellent biocompatibility of polyurethane (PU) and poly(vinyl alcohol) (PVA) when used as coating materials, we synthesized PU/PVA hydrogel coatings and coated the surfac...

Polyurethane-based scaffolds for myocardial tissue engineering.

Bi-layered scaffolds with a 0°/90° lay-down pattern were prepared by melt-extrusion additive manufacturing (AM) using a poly(ester urethane) (PU) synthesized from poly(ε-caprolactone) diol, 1,4-butandiisocyanate and l-lysine ethyl ester dihydrochloride chain extender. Rheological analysis and differential scanning calorimetry of the starting material showed that compression moulded PU films wer...

Unbalanced Cylindrical Magnetron for Accelerating Cavities Coating