Closing the loop for poly(butylene-adipate-co-terephthalate) recycling: depolymerization, monomers separation, and upcycling
(2024) In Green Chemistry- Abstract
- Efficient recycling and upcycling strategies to retain the material in
the economy and away from the ecosystems are important to achieve a
sustainable plastic system. Poly(butylene adipate-co-terephthalate)
(PBAT) is a biodegradable polyester that has gained considerable
interest for various applications. Here, we report a study on enzymatic
depolymerization of PBAT, recovery and purification of its monomers, and
feasible routes for their recycling/upcycling. PBAT films (15 g L−1)
were completely hydrolysed employing a leaf-branch compost cutinase
variant (LCC-WCCG, 1.4 mg per gram polymer) to its monomers at a rate of
0.49 g L−1 h−1. LCC-WCCG kinetics... (More) - Efficient recycling and upcycling strategies to retain the material in
the economy and away from the ecosystems are important to achieve a
sustainable plastic system. Poly(butylene adipate-co-terephthalate)
(PBAT) is a biodegradable polyester that has gained considerable
interest for various applications. Here, we report a study on enzymatic
depolymerization of PBAT, recovery and purification of its monomers, and
feasible routes for their recycling/upcycling. PBAT films (15 g L−1)
were completely hydrolysed employing a leaf-branch compost cutinase
variant (LCC-WCCG, 1.4 mg per gram polymer) to its monomers at a rate of
0.49 g L−1 h−1. LCC-WCCG kinetics were superior to that of other enzymes engineered for PBAT hydrolysis; the data were supported by in silico
investigations. The released monomers were separated using membrane
filtration and precipitation techniques and recovered with purity
exceeding 95%. To close the loop, the monomers were re-polymerized and
successfully cast into PBAT films. Moreover, adipic acid was reacted
with hexamethylene diamine using Novozym®435 to form a polyamide, while
1,4-butanediol was oxidized to 4-hydroxybutyrate using Gluconobacter oxydans cells. The current study exemplifies a high-impact scientific approach toward a circular plastics economy. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/f3de523d-5de9-4dd1-accf-3d58f00a9557
- author
- Ismail, Mohamed LU ; Abouhmad, Adel LU ; Warlin, Niklas LU ; Pyo, Sang-Hyun LU ; Englund Örn, Oliver LU ; Al-Rudainy, Basel LU ; Tullberg, Cecilia LU ; Zhang, Baozhong LU and Hatti-Kaul, Rajni LU
- organization
- publishing date
- 2024-02-21
- type
- Contribution to journal
- publication status
- epub
- subject
- in
- Green Chemistry
- publisher
- Royal Society of Chemistry
- external identifiers
-
- scopus:85186408447
- ISSN
- 1463-9270
- DOI
- 10.1039/D3GC04728H
- language
- English
- LU publication?
- yes
- id
- f3de523d-5de9-4dd1-accf-3d58f00a9557
- date added to LUP
- 2024-03-14 10:42:25
- date last changed
- 2024-03-19 15:02:21
@article{f3de523d-5de9-4dd1-accf-3d58f00a9557, abstract = {{Efficient recycling and upcycling strategies to retain the material in <br> the economy and away from the ecosystems are important to achieve a <br> sustainable plastic system. Poly(butylene adipate-<em>co</em>-terephthalate)<br> (PBAT) is a biodegradable polyester that has gained considerable <br> interest for various applications. Here, we report a study on enzymatic <br> depolymerization of PBAT, recovery and purification of its monomers, and<br> feasible routes for their recycling/upcycling. PBAT films (15 g L<sup>−1</sup>)<br> were completely hydrolysed employing a leaf-branch compost cutinase <br> variant (LCC-WCCG, 1.4 mg per gram polymer) to its monomers at a rate of<br> 0.49 g L<sup>−1</sup> h<sup>−1</sup>. LCC-WCCG kinetics were superior to that of other enzymes engineered for PBAT hydrolysis; the data were supported by <em>in silico</em><br> investigations. The released monomers were separated using membrane <br> filtration and precipitation techniques and recovered with purity <br> exceeding 95%. To close the loop, the monomers were re-polymerized and <br> successfully cast into PBAT films. Moreover, adipic acid was reacted <br> with hexamethylene diamine using Novozym®435 to form a polyamide, while <br> 1,4-butanediol was oxidized to 4-hydroxybutyrate using <em>Gluconobacter oxydans</em> cells. The current study exemplifies a high-impact scientific approach toward a circular plastics economy.}}, author = {{Ismail, Mohamed and Abouhmad, Adel and Warlin, Niklas and Pyo, Sang-Hyun and Englund Örn, Oliver and Al-Rudainy, Basel and Tullberg, Cecilia and Zhang, Baozhong and Hatti-Kaul, Rajni}}, issn = {{1463-9270}}, language = {{eng}}, month = {{02}}, publisher = {{Royal Society of Chemistry}}, series = {{Green Chemistry}}, title = {{Closing the loop for poly(butylene-adipate-<i>co</i>-terephthalate) recycling: depolymerization, monomers separation, and upcycling}}, url = {{http://dx.doi.org/10.1039/D3GC04728H}}, doi = {{10.1039/D3GC04728H}}, year = {{2024}}, }