Chemo-biological upcycling of poly(ethylene terephthalate) to multifunctional coating materials

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Title
Chemo-biological upcycling of poly(ethylene terephthalate) to multifunctional coating materials
Author(s)
H T Kim; M H Ryu; Y J Jung; S Lim; H M Song; J Park; S Y Hwang; H S Lee; Y J Yeon; Bong Hyun Sung; U T Bornscheuer; S J Park; J C Joo; D X Oh
Bibliographic Citation
ChemSusChem, vol. 14, no. 19, pp. 4251-4259
Publication Year
2021
Abstract
Chemo-biological upcycling of poly(ethylene terephthalate) (PET) developed in this study includes the following key steps: chemo-enzymatic PET depolymerization, biotransformation of terephthalic acid (TPA) into catechol, and its application as a coating agent. Monomeric units were first produced through PET glycolysis into bis(2-hydroxyethyl) terephthalate (BHET), mono(2-hydroxyethyl) terephthalate (MHET), and PET oligomers, and enzymatic hydrolysis of these glycolyzed products using Bacillus subtilis esterase (Bs2Est). Bs2Est efficiently hydrolyzed glycolyzed products into TPA as a key enzyme for chemo-enzymatic depolymerization. Furthermore, catechol solution produced from TPA via a whole-cell biotransformation (Escherichia coli) could be directly used for functional coating on various substrates after simple cell removal from the culture medium without further purification and water-evaporation. This work demonstrates a proof-of-concept of a PET upcycling strategy via a combination of chemo-biological conversion of PET waste into multifunctional coating materials.
ISSN
1864-5631
Publisher
Wile
DOI
http://dx.doi.org/10.1002/cssc.202100909
Type
Article
Appears in Collections:
Division of Biomaterials Research > Synthetic Biology and Bioengineering Research Center > 1. Journal Articles
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