Castor oil (CAO)/poly (N-vinyl-2-pyrrolidone) (PVP) hybrid was synthesized at different reaction conditions including PVP/CAO weight ratio, temperature, and time. The results indicated that the optimum to synthesis is reacting of PVP having a molecular 40,000 Da with CAO ratio 30% temperature 150°C for 60 min. characterized via FTIR. Emulsification such in water white stable emulsion. TEM analy...

This study aimed to synthesize a silver nanocomposite hydrogel based on poly (acrylic acid) and (vinyl pyrrolidone) grafted onto salep biopolymer its use in controlled drug release. Drug release is one of the medicine goals that have been happening different methods, such as injections, pills or sprays. The useful dose, has measured by concentration blood system, specific time. Researches shown...

Nanofibers of the poorly water-soluble antibiotic ciprofloxacin (CIP) were fabricated in form an amorphous solid dispersion by using poly(vinyl pyrrolidone) as a polymer matrix, low-cost electrospinning method. The solubility nanofibers well their vitro diffusion remarkably higher than those CIP powder or physical mixture two components. fiber size and morphology optimized, it was found that ad...

Sol–gel synthesis of TiO2/SiO2 multilayers was studied for application to structural color materials. The purpose this study is achieve crack-free thick films, which are indispensable high reflectance and vividness. We investigated the effect polymer additives heating conditions on fracture TiO2 gel films. critical cracking thickness increased more than three-fold at maximum by adding poly(viny...

objective: tissue engineering is an (interdisciplinary field that applies polymeric scaffolds to control tissue formation in three-dinemtion (3d). the scaffold provides the microenvironment (synthetic temporary extracellular matrix) for regenerative cells, supporting cell attachment, proliferation, differentiation, and neo tissue genesis due to their suitable chemical, physical and biological s...

Experiments Materials Toluene, NaBH 4 , AgNO 3 (99+ %) and poly(vinyl pyrrolidone)(K-30) were purchased from Sinopharm Chemical Reagent Co. Ltd. China. Ethylene glycol (anhydrous, 99.8%), 4-aminothiophenol (4-ATP) and crystal violet (CV) were purchased from Sigma-Aldrich. All chemicals used in this study were of analytical grade. HAuCl 4 • 3H 2 O was obtained from Shanghai Chemical Co. Ltd. Chi...

Applications of vanadium dioxide, VO2, able to modulate near-infrared radiation by changing from a transparent reflective/absorptive state, remain limited its shaping as films. In this work, V2O5@PVP core-shell structure is designed prior the formation island-structured VO2 Poly(N-vinyl-2-pyrrolidone) (PVP) used surface stabilizer for preparation V2O5 NP suspensions; additionally, PVP acts redu...

corrosion makes huge economic and ecologic damage all over the world. biologic corrosion of sewer pipes is considered as a serious limitation in economic perspectives. to prevent biologic corrosive damage, lining techniques can be applied by materials and aggregate resistant to attack bacterially in sewer pipes. the role of bacteria is that they convert sulfur compounds into sulfuric acid which...