The method of capturing CO2 greenhouse gas in cellulose matrix

Reducing greenhouse gas has been important issue in recent years. Capturing CO2 gas in polymer matrix is attractive method to reduce the greenhouse gas and uses as a natural resource, such as polymer–CaCO3 composite. Calcium carbonate (CaCO3) and cellulose composite have been synthesized by bubbling CO2 gas into the mixture of cellulose acetate (CA) and Ca(OH)2 solution. Completely dissolved and transparent Ca(OH)2 solution was prepared to react stoichiometric reaction of Ca(OH)2 and CO2. Since the strong absorption peak of the CA in infrared spectra, it is difficult to identify the existence of the CaCO3. To confirm the existence of CaCO3 in the cellulose matrix, the CA was removed by dissolving the reaction composite and by centrifuging the solution to separate CaCO3 particles. The characteristic absorption peaks of CaCO3 at 1450, 875 and 712 cm−1 were obtained for the particles. Field emission scanning electron microscope images show the shape and size of the CaCO3 particles in the cellulose matrix. Therefore, using cellulose and Ca(OH)2 is one of the effective method capturing the CO2 greenhouse gas.