Photoisomerization of l,4-diphenyl-l,3-butadiene (DPB), l,6-diphenyl-l,3,5-hexatriene (DPH) and l,8-diphenyl-l,3,5,7-octatetraene (DPO) in polyvinyl alcohol) (PVA) films was studied unter daylight and direct irradiation. The most efficient photoisomerization occurs in the DPB molecule, the smallest among the compounds investigated. For the greatest, DPO, molecule no distinct isomerization was o...

The antimicrobial activity of a wound dressing is a key factor for preventing and treating wound infection. The current study evaluated the physiochemical properties and antimicrobial activities of semi-IPNs (interpenetrating polymer networks) based on chitosan/polyvinyl alcohol (PVA) films and nanofibers as candidates for wound dressings and investigated the effects of morphologies (nanofibrou...

In this work, the coexistence of Write Once Read Many Memory (WORM) and memristor can be achieved in a single device of Poly(3,4-ethylenedioxythiophene): polystyrene sulfonate (PEDOT: PSS) and Polyvinyl Alcohol (PVA) blend organic memory system. In memristor mode, the bistable resistance states of the device can be cycled for more than 1000 times. Once a large negative bias of -8V was applied t...

Polyvinyl alcohol and calcium oxide composites appeared by casting technique. The calcium oxide added to polyvinyl alcohol with different weight percentages are (0,1,2 and 3) wt.%. Results showed that the absorbance increases with increase the weight percentage of calcium oxide. The absorption coefficient, extinction coefficient, refractive index and real and imaginary parts of dielectric const...

Polymer blend electrolytes have been prepared using the casting technique. The electrolyte is composed of two polymers polyvinyl alcohol (PVA)/polyvinylpyrrolidone (PVP)) with a fixed ratio (50 : 50) loaded varied ratios FeCl2 (0.5, 1, and 2 wt.%). impedance analysis indicates that AC conductivity increased as temperature was following power law. Nyquist plots for pure composite samples present...

Homogeneous membranes were prepared by blending poly (acrylic acid) with poly (vinyl alcohol). These blend membranes were evaluated for the selective separation of alcohols from toluene by pervaporation. The flux and selectivity of the membranes were determined both as a function of the blend composition and of the feed mixture composition. The results showed that a polymer blending method coul...

In the present study, an attempt has been made to impart antimicrobial finishing on cotton woven fabric using nano silver solution, at various concentrations: 5 gpl, 10 gpl, 15 gpl, 20 gpl, and 25 gpl in the presence of PVOH (5 gpl, 7.5 gpl and 10 gpl) and an eco-friendly cross linking agent, namely 100gpl glyoxal/65 gpl Appretan N 92111 (binder) applied by the pad-dry-cure technique. Curing co...