Work

New recycled polyethylene terephthalate imidazolium ionic liquids and their applications for co2 exhaust capture

Year: 2025

Type: article

Abstract: The recycling of polyethylene terephthalate (PET) waste using imidazolium ionic liquids IILs to capture CO 2 exhaust offers a sustainable and environmentally friendly approach to addressing the challenges of plastic waste pollution. The functionalized imidazolium acetate with two hydroxyl and amine end groups were prepared by simple method for glycolysis and amidolysis PET to produce water soluble oligomers during short reaction time at 180 °C. 1 HNMR analysis was used to determine the functionality and molecular weight of recycled PET oligomers with 1,3-bis(2-hydroxyethyl)-1H-imidazol-3-ium acetate ionic liquid (HIIL) and 1,3-bis(3-aminopropyl)-1H-imidazol-3-ium acetate ionic liquid (HIIL) AIIL that were 3565.7 and 1316.23 g.mol -1 , respectively. The thermal stability and characteristics prove that the formation of elastic oligomers having higher elasticity for RPET-HIIL > RPET-AIIL that have T g values for RPET-HIIL and RPET-AIIL at -69.34 and -48.44 °C, respectively with disappearance of T g of PET. The CO 2 absorption capacities at atmospheric pressure confirm that RPET-AIIL and RPET-HIIL absorb more CO 2 with higher efficiency to about 25.2 mol CO 2 / Kg IIL and desorbs CO 2 more easily in the short time.

Source: Scientific Reports

DOI: 10.1038/s41598-025-15433-7

Authors: Ayman M. Atta, Alia A. Melegy, A. N. El-hoshoudy

Institution: Egyptian Petroleum Research Institute

Language: English

Topic: Ionic liquids properties and applications

Subfield: Catalysis

Field: Chemical Engineering

Domain: Physical Sciences

SDGs: Responsible consumption and production, Climate action

Open Access status: gold

Estimated APC paid: $2,690