The increasingconcentrationof carbondioxidein the atmos-phereposessignificantchallengesfor its capture.Carbondioxideemissionscontributesubstantiallyto the greenhouseeffect,leadingto detrimentaleffectson ecosystemsand drasticclimatechange.In this study,we synthesizedtwo polymericSchiff’sbases,by condensingpartiallyoxidizedpolyvinylalcohol(OPVA)with1,2-ethylenediamineand1,6-hexamethylenediamine.The formedSchiff’sbasesare abbreviatedOPVA-EDandOPVA-HMD,respectively.OPVAwasinitiallypreparedthroughoxidationof polyvinylalcoholusingpotassiumpermanganate.We investigatedthe potentialof theseSchiff’sbasesfor CO2adsorption.Structuralelucidationof the Schiff’sbaseswas conductedusingFouriertransforminfrared(FTIR),1Hnuclearmagneticresonance(NMR),and X-raydiffraction(XRD)techniques.Thermogravimetricanalysis(TGA)and gas adsorp-tion experimentswereemployedto determinetheirphysicalproperties.The captureand releaseof CO2wereevaluatedat atemperatureof 25°C usingtheseSchiff’sbasesas adsorbents.ThefindingsindicatethatOPVA-EDexhibitssuperiorCO2adsorptioncapacitycomparedto OPVA-HMD,withadsorptioncapacitiesof 0.22 mmol/gand0.18 mmol/gat 15 barsforOPVA-EDand OPVA-HMD,respectively.
Preparation and characterization of polymeric Schiff's base for carbon dioxide adsorption
Policicchio, Alfonso;
2023-01-01
Abstract
The increasingconcentrationof carbondioxidein the atmos-phereposessignificantchallengesfor its capture.Carbondioxideemissionscontributesubstantiallyto the greenhouseeffect,leadingto detrimentaleffectson ecosystemsand drasticclimatechange.In this study,we synthesizedtwo polymericSchiff’sbases,by condensingpartiallyoxidizedpolyvinylalcohol(OPVA)with1,2-ethylenediamineand1,6-hexamethylenediamine.The formedSchiff’sbasesare abbreviatedOPVA-EDandOPVA-HMD,respectively.OPVAwasinitiallypreparedthroughoxidationof polyvinylalcoholusingpotassiumpermanganate.We investigatedthe potentialof theseSchiff’sbasesfor CO2adsorption.Structuralelucidationof the Schiff’sbaseswas conductedusingFouriertransforminfrared(FTIR),1Hnuclearmagneticresonance(NMR),and X-raydiffraction(XRD)techniques.Thermogravimetricanalysis(TGA)and gas adsorp-tion experimentswereemployedto determinetheirphysicalproperties.The captureand releaseof CO2wereevaluatedat atemperatureof 25°C usingtheseSchiff’sbasesas adsorbents.ThefindingsindicatethatOPVA-EDexhibitssuperiorCO2adsorptioncapacitycomparedto OPVA-HMD,withadsorptioncapacitiesof 0.22 mmol/gand0.18 mmol/gat 15 barsforOPVA-EDand OPVA-HMD,respectively.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
