![]() CO 2 is known to be capable of plasticizing polymers and decreasing their viscosity, melting point, and glass transition temperature. Among gases, CO 2 is known to dissolve well in polymers and has been reported as a specific interaction between the CO 2 and polymer, estimation of the solubility of CO 2 in polymers, measurement of solubility of CO 2 in crystalline polymers, and measurement of solubility of CO 2 in amorphous polymers. The demonstrated CO 2 process is a suitable method for manufacturing parts used for the food industry, medical treatment, and living environments that demand high purity. CO 2 has also been practically used as an extraction solvent for biomass in the food industry. CO 2 is known as an environmentally friendly solvent in particular its supercritical state is recognized as a green solvent, and its application in various processes has been researched. In addition, CO 2 is a very low toxic substance it is also used in the food industry, e.g., carbonated beverages. As the CO 2 used is released into the atmosphere and does not remain in the polymer, impurities do not remain. Because the method is a room temperature process and no heater is required, it is a low energy process. Considering the advantages of such materials, CO 2-assisted polymer compression (CAPC), a method that uses CO 2 to adhere fibrous sheets to create a porous polymer material, has been developed. ![]()
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