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Chemo‐Biological Upcycling of Poly(ethylene terephthalate) to Multifunctional Coating Materials
Author(s) -
Kim Hee Taek,
Hee Ryu Mi,
Jung Ye Jean,
Lim Sooyoung,
Song Hye Min,
Park Jeyoung,
Hwang Sung Yeon,
Lee HoeSuk,
Yeon Young Joo,
Sung Bong Hyun,
Bornscheuer Uwe T.,
Park Si Jae,
Joo Jeong Chan,
Oh Dongyeop X.
Publication year - 2021
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.202100909
Subject(s) - depolymerization , terephthalic acid , hydrolysis , polyester , biotransformation , monomer , ethylene , coating , materials science , chemistry , organic chemistry , polymer chemistry , enzyme , catalysis , polymer
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.