Schiff’s base vanillin thiourea polyurethane foam

Schiff’s base vanillin thiourea polyurethane foam (PUF) was prepared using open cell flexible polyurethane foam polyether type which supply from an Egyptian company for foam production. A 5 g of PUF cubes was soaked in 1 mol/L HCl leaving it whole night soaked then squeezed it very well to get over all HCl remain and then washed it with water. A 30 ml concentrated HCl was added to 5 g PUF-NH2 cubes until this mixture was warmed. A 60 ml of saturated solution of ammonium thiocyanate (1:2) was added slowly to PUF-NH2 cubes until got turbid solution. The foam was poured into cold water, washed and dried at room temperature (Mathapati et el., 2012). The next step is adding vanillin to PUF (1:1) to reflux with 200 ml ethanol for 2h. SVT-PUF (yellow foam) was refluxed with ZnONPs for 6 h to get [email protected] composite, filtered, washed with ethanol and air dried