Ultrasound-Accelerated Alkaline Hydrolysis of PET at Ambient Temperature: A High-Speed Approach to Chemical Recycling
발표자
박진 (테라클)
연구책임자
박진 (테라클)
초록
내용
The depolymerization of polyethylene terephthalate (PET) via hydrolysis usually requires long reaction times and harsh conditions, hindering large-scale application. Although photocatalysis, microwave irradiation, and enzymatic depolymerization have been studied, most still demand high energy input and cost. In this study, we successfully established an ultrasound-assisted hydrolytic depolymerization process that dramatically accelerates PET breakdown under mild conditions. Ultrasound generates cavitation, creating localized microenvironments of high temperature and pressure that promote polymer chain scission. A toluene–ethanol co-solvent system with sodium hydroxide as a catalyst was used to enhance reactivity. Results showed that the reaction time decreased from 2 hours without ultrasound to 10 minutes with ultrasound at 60 °C and atmospheric pressure. Catalyst and solvent reusability were confirmed, indicating improved energy efficiency and potential economic benefits.