Carbon dioxide was known the gas that affect to greenhouse effect. Hence, many studies to storage or reduce carbon dioxide generation were attempted. In the other side, measuring studies of carbon dioxide concentration in atmosphere were carried out at a time. In this study, we prepared non-eluted polymer composite film with the dye that can visually indicate for carob dioxide gas through head space. For the indicating of carbon dioxide through head space, Cresol Red sodium salt (CRNa) as hydrophilic pH indicator [7.2(yellow) ~ 8.8 (purple)] and tetraoctylammonium bromide (TOABr) were reacted, and then hydrophobic ion-pair dye as Cresol red anion/tetraoctylammonium cation (CR-/TOA+) was prepared through the extraction. In here, the prepared CR-/TOA+ ion-pair dye was yellow as high acidity. CR-/TOA+ ion pair dye that has reversible property was needed that changed to basicity because the pH was decreased according to increase concentration of carbon dioxide. So, we used the amine polymer as polyethyleneimine (PEI) to increase pH. PEI was known polymer that has many amine groups, was high viscosity liquid, and was soluble in water. To can be not eluted, poly(styrene-co-maleic anhydride) (PSMA) was dissolved, and then we were reacted with maleic anhydride of PSMA and amine groups in PEI. After finish reaction, CR-/TOA+ ion pair dye was doped in PEI-PSMA. The carbon dioxide indicating films were prepared through mixing and blending with polystyrene (PS), then casting on polytetrafluoroethylene (PTFE) sheet using doctor blade method. These films were analyzed by UV-visible spectrometer as concentration of carbon dioxide

Carbon dioxide gas indicating film using the hydrophobic ion pair dye doped on polyethyleneimine/poly(styrene-co-maleic anhydride)

253rd National Meeting (2017)

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