Abstract Chemical modification of poly(vinyl alcohol) (PVA) with different monomers is a convention method for the development its properties. In this study, new multifunctional membranes (PVA-A) 1–3 , (PVA-P) (PVA-AG) and (PVA-PG) were designed synthesized by reaction PVA heterocyclic compounds [ N ʹ-bi- α -azido succinimide (A), -phthalimido- (P)] using glutaraldehyde (G) as cross-linker, res...

An investigation on the panchromaticity of a silver-doped poly(vinyl alcohol)/acrylamide photopolymer system is presented in this paper. Frequency-doubled Nd:YAG (532 nm) and Ar⁺ (488 nm) lasers were used for the characterization of the films. Previous studies using an He-Ne laser (632.8 nm) showed that plane-wave transmission grating with a high diffraction efficiency of 75% could be stored in...

Nanocomposites of a polymer and carbon nanotubes exhibit high electrical and thermal conductivity and enhanced mechanical properties in comparison to the polymer alone. Film formation from latex dispersions is an ideal way to create nanocomposite coatings with the advantages of solvent-free processing and a high uniformity of dispersion. It is shown here that carbon nanotubes functionalised wit...

In this study, the development and characterization of novel polymer blends based on chitosan-poly (vinyl alcohol) and physically cross-linked by freeze-thaw method for possible use in a variety of biomedical application is reported. The present investigation deals with designing savlon-loaded blend hydrogels (coined as cryogels) of poly (vinyl alcohol) (PVA) and chitosan by repeated freeze-tha...

The interest in the development of edible and biodegradable films has increased because it is every day more evident that non-degradable materials are doing much damage to the environment. Blends based on different ratios of plasticized poly(vinyl alcohol) (PVA), carboxymethyl cellulose (CMC) and Tannin compound were prepared by solution casting in the form of thin films. Then the blend films w...

Dedicated to Professor Gregorio Weber in the occasion of his 80th birthday It was found by investigating dichroism and emission anisotropy in the case of oneand two-photon excitation of Hoechst 33342 [bis-benzimide,2,5'-bi-lH-benzimidazole, 2'-(4-ethoxyphenyl)-5-5(4methyl-l-piperazinyl)] in stretched poly(vinyl alcohol) (PVA) films, that the absorption and fluorescence transition moments lie al...

Films of pure poly(vinyl alcohol) (PVA) and samples doped with di€erent concentrations of heptahydrated ferrous sulphate were prepared using a casting method. Mechanical and relaxation properties were measured before and after irradiation. The modulus of elasticity, yield strength, tensile strength ductility and relaxation time were produced from true stress±true strain and stress relaxation me...

This paper describes the rapid fabrication of an organic/inorganic multi-layered composite film: Parylene-poly(vinyl alcohol) (PVA)-calcium carbonate (CaCO3) composite film. CaCO3 crystals on PVA film were sandwiched between Parylene films, and thermal bonding was carried out after folding the sandwiched crystals eight times. Using this method, a millimeterthick 48-layered organic/inorganic com...

objective(s): the aim of this study was to insert nitrofurazone in a chitosan membrane to be used as a wound dressing.   materials and methods: several blend films using chitosan (cs) and polyvinyl alcohol (pva), containing nitrofurazone were prepared by means of casting/solvent evaporating technique. different characteristics such as mechanical properties, water vapor transmission rate (wvtr),...