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The Hydrolysis Properties of Polyethylene Glycol under Ambient Nonthermal Plasma Conditions
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DOI：10.1039/D5YA00163C.png)
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Abstract
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Polyethylene glycol (PEG) has been widely used in various industries for its biodegradability. However; the biodegradation of high molecular weight PEGs poses challenges due to limited microbial uptake. In this study; we investigated a rapid nonthermal plasma-assisted hydrolysis method to break down long-chain PEGs into shorter chains and valuable liquid and gas products. Utilizing a dielectric barrier discharge (DBD) reactor under ambient conditions; we achieve complete conversion of PEG into gas and liquid products; including methane (CH4); carbon monoxide (CO); carbon dioxide (CO2); methanol (CH3OH); ethanol (C2H5OH); acetic acid (CH3COOH); and ethylene glycol (C2H6O2); in mere minutes; which is significantly faster than conventional hydrolysis and biodegradation methods. Experimental results show that liquid products dominate throughout the reaction; while gas products increase over time; arising from secondary reactions of the liquid intermediates. Density functional theory (DFT) calculations elucidate the reaction pathways responsible for product generation. These findings highlight the promise of nonthermal plasma-assisted hydrolysis as an efficient approach for converting PEG into short-chain products and valuable chemical intermediates.
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