Ändra sökning
Länk till posten
Permanent länk

Direktlänk
BETA
Olsen, Peter
Alternativa namn
Publikationer (3 of 3) Visa alla publikationer
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
Öppna denna publikation i ny flik eller fönster >>A retrobiosynthesis-based route to generate pinene-derived polyesters
Visa övriga...
2019 (Engelska)Ingår i: ChemBioChem (Print), ISSN 1439-4227, E-ISSN 1439-7633, Vol. 20, s. 1664-1671Artikel i tidskrift (Refereegranskat) 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.

Nationell ämneskategori
Polymerkemi
Forskningsämne
Bioteknologi
Identifikatorer
urn:nbn:se:kth:diva-260797 (URN)10.1002/cbic.201900046 (DOI)000477916100008 ()2-s2.0-85066903140 (Scopus ID)
Anmärkning

QC 20191008

Tillgänglig från: 2019-09-30 Skapad: 2019-09-30 Senast uppdaterad: 2019-10-08Bibliografiskt granskad
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
Öppna denna publikation i ny flik eller fönster >>Transforming technical lignins to structurally defined star-copolymers under ambient conditions
Visa övriga...
2019 (Engelska)Ingår i: Green Chemistry, ISSN 1463-9262, E-ISSN 1463-9270, Vol. 21, nr 9, s. 2478-2486Artikel i tidskrift (Refereegranskat) 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.

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

QC 20190814

Tillgänglig från: 2019-08-14 Skapad: 2019-08-14 Senast uppdaterad: 2019-12-11Bibliografiskt granskad
Yang, X., Reid, M. S., Olsén, P. & Berglund, L.Eco-Friendly Cellulose Nanofibrils Designed by Nature: Effects from Preserving Native State.
Öppna denna publikation i ny flik eller fönster >>Eco-Friendly Cellulose Nanofibrils Designed by Nature: Effects from Preserving Native State
(Engelska)Manuskript (preprint) (Övrigt vetenskapligt)
Nationell ämneskategori
Materialteknik Pappers-, massa- och fiberteknik
Identifikatorer
urn:nbn:se:kth:diva-262841 (URN)
Anmärkning

QC 20191023

Tillgänglig från: 2019-10-21 Skapad: 2019-10-21 Senast uppdaterad: 2019-10-23Bibliografiskt granskad
Organisationer

Sök vidare i DiVA

Visa alla publikationer