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Olsen, Peter
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Publikasjoner (3 av 3) Visa alla publikasjoner
Stamm, A., Biundo, A., Schmidt, B., Brücher, J., Lundmark, S., Olsén, P., . . . Syrén, P.-O. (2019). A retrobiosynthesis-based route to generate pinene-derived polyesters. ChemBioChem (Print), 20, 1664-1671
Åpne denne publikasjonen i ny fane eller vindu >>A retrobiosynthesis-based route to generate pinene-derived polyesters
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2019 (engelsk)Inngår i: ChemBioChem (Print), ISSN 1439-4227, E-ISSN 1439-7633, Vol. 20, s. 1664-1671Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Significantly increased production of biobased polymers is aprerequisite to replace petroleum-based materials towardsreaching a circular bioeconomy. However, many renewablebuilding blocks from wood and other plant material are notdirectly amenable for polymerization, due to their inert backbonesand/or lack of functional group compatibility with thedesired polymerization type. Based on a retro-biosyntheticanalysis of polyesters, a chemoenzymatic route from (@)-apinenetowards a verbanone-based lactone, which is furtherused in ring-opening polymerization, is presented. Generatedpinene-derived polyesters showed elevated degradation andglass transition temperatures, compared with poly(e-decalactone),which lacks a ring structure in its backbone. Semirationalenzyme engineering of the cyclohexanone monooxygenasefrom Acinetobacter calcoaceticus enabled the biosynthesis ofthe key lactone intermediate for the targeted polyester. As aproof of principle, one enzyme variant identified from screeningin a microtiter plate was used in biocatalytic upscaling,which afforded the bicyclic lactone in 39% conversion in shakeflask scale reactions.

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Bioteknologi
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urn:nbn:se:kth:diva-260797 (URN)10.1002/cbic.201900046 (DOI)000477916100008 ()2-s2.0-85066903140 (Scopus ID)
Merknad

QC 20191008

Tilgjengelig fra: 2019-09-30 Laget: 2019-09-30 Sist oppdatert: 2019-10-08bibliografisk kontrollert
Olsen, P., Jawerth, M., Lawoko, M., Johansson, M. & Berglund, L. (2019). Transforming technical lignins to structurally defined star-copolymers under ambient conditions. Green Chemistry, 21(9), 2478-2486
Åpne denne publikasjonen i ny fane eller vindu >>Transforming technical lignins to structurally defined star-copolymers under ambient conditions
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2019 (engelsk)Inngår i: Green Chemistry, ISSN 1463-9262, E-ISSN 1463-9270, Vol. 21, nr 9, s. 2478-2486Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Transforming biomass derived components to materials with controlled and predictable properties is a major challenge. Current work describes the controlled synthesis of starcopolymers with functional and degradable arms from the Lignoboost (R) process. Macromolecular control is achieved by combining lignin fractionation and characterization with ring-opening copolymerization (ROCP). The cyclic monomers used are epsilon-caprolactone (epsilon CL) and a functional carbonate monomer, 2-allyloxymethyl-2-ethyltrimethylene carbonate (AOMEC). The synthesis is performed at ambient temperature, under bulk conditions, in an open flask, and the graft composition and allyl functionality distribution are controlled by the copolymerization kinetics. Emphasis is placed on understanding the initiation efficiency, structural changes to the lignin backbone and the final macromolecular architecture. The present approach provides a green, scalable and cost effective protocol to create well-defined functional macromolecules from technical lignins.

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Identifikatorer
urn:nbn:se:kth:diva-252978 (URN)10.1039/c9gc00835g (DOI)000468627300033 ()2-s2.0-85065578205 (Scopus ID)
Merknad

QC 20190814

Tilgjengelig fra: 2019-08-14 Laget: 2019-08-14 Sist oppdatert: 2019-12-11bibliografisk kontrollert
Yang, X., Reid, M. S., Olsén, P. & Berglund, L.Eco-Friendly Cellulose Nanofibrils Designed by Nature: Effects from Preserving Native State.
Åpne denne publikasjonen i ny fane eller vindu >>Eco-Friendly Cellulose Nanofibrils Designed by Nature: Effects from Preserving Native State
(engelsk)Manuskript (preprint) (Annet vitenskapelig)
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Identifikatorer
urn:nbn:se:kth:diva-262841 (URN)
Merknad

QC 20191023

Tilgjengelig fra: 2019-10-21 Laget: 2019-10-21 Sist oppdatert: 2019-10-23bibliografisk kontrollert
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