ABSTRACT Biomaterials having stimuli response are interesting in the biomedical field. This paper reports about swelling response and internalstructural of biomineralized (CaCO3) polyvinylpyrrolidone (PVP) carboxymethylcellulose (CMC) hydrogel having various thicknesses (0.1-0.4 mm). Samples were tested in aqueous solution using temperature ranges from 10 to 40 °C; pH varies from 4 to 9, time 6...

Celecoxib spherical agglomerates were prepared with polyvinylpyrrolidone (PVP) using acetone, water and chloroform as solvent, non-solvent and bridging liquid, respectively. The agglomerates were characterized by differential scanning calorimetry (DSC), X-ray diffraction (XRD), IR spectroscopic studies and scanning electron microscopy (SEM). The IR spectroscopy and DSC results indicated the abs...

Electrospun nanofibrous mats consisting of chitosan (CS) and polyvinylpyrrolidone (PVP) were constructed. Tuning solution process parameters was performed resulted in an electrospun system containing a 6:4 ratio PVP:CS. This is significant increase the proportion spun CS on previously reported highest PVP:CS blend. SEM analysis showed that with 4 wt% CS/6 PVP (sample E) comprised homogenous, un...

Polyvinylpyrrolidone/polyaniline emeraldine salt (PVP/PANI) with additives (TiO2, ZnO, NaCl, and Na2SO4) was synthesized via oxidative in situ polymerization. Because of using PVP/PANI as a protective membrane layer and its applications in an electrical device, we investigated the mechanical and rheological properties of PVP/PANI and other composites in orde...

In this work, polyvinylpyrrolidone (PVP), multi-walled carbon nanotubes (MWCNTs) nanocomposite was prepared and hybridized with Graphene (Gr) by the solution casting method. The morphological electrical properties were investigated field effect scanning electron microscopy (FESEM) images, portraying a uniform dispersion of graphene within PVP-MWCNT nanocomposite. AC conductivity increased from ...

In the present work, two asymmetric polymer membranes based on polyvinylidene fluoride (PVDF) and polyvinylpyrrolidone (PVP) with chitin and chitosan (as extractive agents) were synthesized through the phase inversion technique. The mechanisms of oriented process for the facilitated extraction of blue P3R dye across the as-prepared membranes were elucidated through different experiments. Furthe...

Abstract Electrospinning is a well-known and straightforward technique for creating nanofibres from various materials, such as metals, ceramics, polymers. The process takes place in strong electric field, causing the polymer solution to stretch, resulting micro/nanoscale fibres. parameters of electrospinning influence morphology nanofibres. In present study, zinc oxide (ZnO) were created polyvi...

BACKGROUND Povidone iodine (PVP-I) is a chemical complex of polyvinylpyrrolidone (also known as povidone or PVP) and elemental iodine. Iodine containing compounds are widely and commonly used as antiseptics and disinfectants. They are available in various forms like aqueous solution, tincture, aerosol, ointment, or foam. Skin irritation to them is due to the oxidative effects of iodine. Because...

In this study, we investigated the effects of polymers on pharmaceutical cocrystal formation process. Ibuprofen (IBU) was selected as active ingredient (API), nicotinamide (NIC) and saccharin (SAC) coformer (CCF), ethanol/water solvent, polyvinylpyrrolidone (PVP) poly (ethylene glycol) (PEG) representative polymers. We prepared IBU-NIC IBU-SAC cocrystals in ethanol-water cosolvent absence or pr...

Before the metabolic role of the blood plasma expander, polyvinylpyrrolidone (PVP) can be studied by the technic of ionography, some fundamental ionographic characteristics of the polymer, per se, must be determined. This study is concerned with the influence of such variable factors as time, potential gradient, temperature, the pH of the buffer and its ionic strength on the mobility of the mig...