Sorption of sodium dodecylsulfate and cetyltrimethylammonium bromide on polyurethane foams

Polyurethane foams as solid chromogenic reagents for diffuse reflectance spectroscopy

“…This is evidence of chemical reaction of the functional groups of the polymer. The changes observed in the infrared spectra were interpreted by using reported data on the characteristic vibration frequencies of corresponding groups, modern concepts of the mechanisms of reactions in polymers [24] and the chemical properties of the compounds studied [25].…”

“…PUF tablets (16 mm in diameter, 5 mm thick) were cut from a commercially available polymer sheet. The mass of a PUF tablet was approximately 0.04±0.005 g. The tablets were washed as described elsewhere [24]. Polyurethane foam loaded with 5 mol L -1 HCl was also used.…”

“…An approach combining preconcentration by PUF and direct determination on the sorbent by thin layer spectrophotometry [11], diffuse reflectance spectroscopy [12,13,14,15,16,17], luminescence [18,19,20,21] or X-ray fluorescence [22] also seems promising.…”

“…One approach is based on the sorption of colored compounds formed by an analytical reagent and the test component in the analyzed solution. This approach has been applied to metal ions [12], phenols [13], 1-naphthol [16], and cationic [14] and anionic [15] surfactants. Another approach is based on the use of loaded PUF.…”

Chemical compatibility of PU/PAN interpenetrating polymer network membrane with substituted aromatic solvents

“…The use of geomembranes in hazardous waste treatment has been increased in the recent past [1][2][3][4][5]. Polyether-based polyurethane (PU) foam are being studied by many scientists for the isolation of heavy metal ions like cobalt and antimony and absorption of phenol compounds in aqueous solutions [6][7][8]. Generally, the hazardous materials are to be stored in holding tanks or open ponds before the treatment.…”