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Publications (10 of 51) Show all publications
Fogelström, L., Norström, E., Khabbaz, F., Brucher, J. & Malmström, E. (2019). A fully green wood adhesive based on hemicelluloses derived from pulp processes. Paper presented at National Meeting of the American-Chemical-Society (ACS), MAR 31-APR 04, 2019, Orlando, FL. Abstracts of Papers of the American Chemical Society, 257
Open this publication in new window or tab >>A fully green wood adhesive based on hemicelluloses derived from pulp processes
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2019 (English)In: Abstracts of Papers of the American Chemical Society, ISSN 0065-7727, Vol. 257Article in journal, Meeting abstract (Other academic) Published
Place, publisher, year, edition, pages
AMER CHEMICAL SOC, 2019
National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:kth:diva-257592 (URN)000478860503060 ()
Conference
National Meeting of the American-Chemical-Society (ACS), MAR 31-APR 04, 2019, Orlando, FL
Note

QC 20190919

Available from: 2019-09-19 Created: 2019-09-19 Last updated: 2019-09-19Bibliographically approved
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
Open this publication in new window or tab >>A retrobiosynthesis-based route to generate pinene-derived polyesters
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2019 (English)In: ChemBioChem (Print), ISSN 1439-4227, E-ISSN 1439-7633, Vol. 20, p. 1664-1671Article in journal (Refereed) 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.

National Category
Polymer Chemistry
Research subject
Biotechnology
Identifiers
urn:nbn:se:kth:diva-260797 (URN)10.1002/cbic.201900046 (DOI)000477916100008 ()2-s2.0-85066903140 (Scopus ID)
Note

QC 20191008

Available from: 2019-09-30 Created: 2019-09-30 Last updated: 2019-10-08Bibliographically approved
Stamm, A., Tengdelius, M., Schmidt, B., Engström, J., Syrén, P.-O., Fogelström, L. & Malmström, E. (2019). Chemo- enzymatic pathways toward pinene- based renewable materials. Green Chemistry, 21(10), 2720-2731
Open this publication in new window or tab >>Chemo- enzymatic pathways toward pinene- based renewable materials
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2019 (English)In: Green Chemistry, ISSN 1463-9262, E-ISSN 1463-9270, Vol. 21, no 10, p. 2720-2731Article in journal (Refereed) Published
Abstract [en]

Sobrerol methacrylate (SobMA) was synthesized and subsequently polymerized using different chemical and enzymatic routes. Sobrerol was enzymatically converted from -pinene in a small model scale by a Cytochrome P450 mutant from Bacillus megaterium. Conversion of sobrerol into SobMA was performed using both classical ester synthesis, i.e., acid chloride-reactions in organic solvents, and a more green approach, the benign lipase catalysis. Sobrerol was successfully esterified, leaving the tertiary alcohol and ene to be used for further chemistry. SobMA was polymerized into PSobMA using different radical polymerization techniques, including free radical (FR), controlled procedures (Reversible Addition Fragmentation chain-Transfer polymerization, (RAFT) and Atom Transfer Radical Polymerization (ATRP)) as well as by enzyme catalysis (horseradish peroxidase-mediated free radical polymerization). The resulting polymers showed high glass-transition temperatures (T-g) around 150 degrees C, and a thermal degradation onset above 200 degrees C. It was demonstrated that the T-g could be tailored by copolymerizing SobMa with appropriate methacrylate monomers and that the Flory-Fox equation could be used to predict the T-g. The versatility of PSobMA was further demonstrated by forming crosslinked thin films, either using the ene'-functionality for photochemically initiated thiol-ene'-chemistry, or reacting the tertiary hydroxyl-group with hexamethoxymethylmelamine, as readily used for thermally curing coatings systems.

National Category
Polymer Technologies Polymer Chemistry
Identifiers
urn:nbn:se:kth:diva-252972 (URN)10.1039/c9gc00718k (DOI)000468627800016 ()2-s2.0-85066853137 (Scopus ID)
Note

QC 20190812

Available from: 2019-08-12 Created: 2019-08-12 Last updated: 2019-08-12Bibliographically approved
Fogelström, L., Stamm, A., Tengdelius, M., Syrén, P.-O. & Malmström, E. (2019). New chemo-enzymatic pathways for sustainable terpene-based polymeric materials. Paper presented at National Meeting of the American-Chemical-Society (ACS), MAR 31-APR 04, 2019, Orlando, FL. Abstracts of Papers of the American Chemical Society, 257
Open this publication in new window or tab >>New chemo-enzymatic pathways for sustainable terpene-based polymeric materials
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2019 (English)In: Abstracts of Papers of the American Chemical Society, ISSN 0065-7727, Vol. 257Article in journal, Meeting abstract (Other academic) Published
Place, publisher, year, edition, pages
AMER CHEMICAL SOC, 2019
National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:kth:diva-257595 (URN)000478860502626 ()
Conference
National Meeting of the American-Chemical-Society (ACS), MAR 31-APR 04, 2019, Orlando, FL
Note

QC 20190919

Available from: 2019-09-19 Created: 2019-09-19 Last updated: 2019-09-19Bibliographically approved
Malmström, E., Fogelström, L., Stamm, A., Tengdelius, M., Biundo, A. & Syrén, P.-O. (2019). Sustainable terpene-based polymeric materials. Paper presented at 257th National Meeting of the American-Chemical-Society (ACS), MAR 31-APR 04, 2019, Orlando, FL. Abstracts of Papers of the American Chemical Society, 257
Open this publication in new window or tab >>Sustainable terpene-based polymeric materials
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2019 (English)In: Abstracts of Papers of the American Chemical Society, ISSN 0065-7727, Vol. 257Article in journal, Meeting abstract (Other academic) Published
Place, publisher, year, edition, pages
American Chemical Society (ACS), 2019
National Category
Other Chemistry Topics
Identifiers
urn:nbn:se:kth:diva-257660 (URN)000478861204618 ()
Conference
257th National Meeting of the American-Chemical-Society (ACS), MAR 31-APR 04, 2019, Orlando, FL
Note

QC 20190903

Available from: 2019-09-03 Created: 2019-09-03 Last updated: 2019-09-03Bibliographically approved
Torron, S., Johansson, M., Malmström, E., Fogelström, L., Hult, K. & Martinelle, M. (2017). Telechelic polyesters and polycarbonates prepared by enzymatic catalysis. In: Handbook of Telechelic Polyesters, Polycarbonates, and Polyethers: (pp. 29-64). Pan Stanford Publishing Pte. Ltd.
Open this publication in new window or tab >>Telechelic polyesters and polycarbonates prepared by enzymatic catalysis
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2017 (English)In: Handbook of Telechelic Polyesters, Polycarbonates, and Polyethers, Pan Stanford Publishing Pte. Ltd. , 2017, p. 29-64Chapter in book (Other academic)
Abstract [en]

The majority of polyesters and polycarbonates are traditionally synthesized through conventional metal-based catalysis. Although effective, due to environmental concerns, their substitution for other more environmentally friendly alternatives has received increasing interest during the last decades. The search for catalytic systems that also allow milder reaction conditions has been intensified, owing to 30the unwanted side reactions, for example, backbone scissoring, that the metal-based catalysts may cause [1]. In this context, enzymes are anticipated as suitable alternatives [2,3,4,5,6,7,-8]. 

Place, publisher, year, edition, pages
Pan Stanford Publishing Pte. Ltd., 2017
National Category
Organic Chemistry
Identifiers
urn:nbn:se:kth:diva-236854 (URN)10.1201/9781315364469 (DOI)2-s2.0-85053748623 (Scopus ID)9789814745635 (ISBN)9789814745628 (ISBN)
Note

QC 20181219

Available from: 2018-12-19 Created: 2018-12-19 Last updated: 2018-12-19Bibliographically approved
Fogelström, L., Norström, E., Holmqvist, J., Pendergraph, S. A., Brucher, J. & Malmström, E. (2017). Wood-derived hemicelluloses as green binders in wood adhesives. Paper presented at 253rd National Meeting of the American-Chemical-Society (ACS) on Advanced Materials, Technologies, Systems, and Processes, APR 02-06, 2017, San Francisco, CA. Abstracts of Papers of the American Chemical Society, 253
Open this publication in new window or tab >>Wood-derived hemicelluloses as green binders in wood adhesives
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2017 (English)In: Abstracts of Papers of the American Chemical Society, ISSN 0065-7727, Vol. 253Article in journal, Meeting abstract (Other academic) Published
Place, publisher, year, edition, pages
American Chemical Society (ACS), 2017
National Category
Chemical Sciences
Identifiers
urn:nbn:se:kth:diva-243602 (URN)000430568503334 ()
Conference
253rd National Meeting of the American-Chemical-Society (ACS) on Advanced Materials, Technologies, Systems, and Processes, APR 02-06, 2017, San Francisco, CA
Note

QC 20190206

Available from: 2019-02-06 Created: 2019-02-06 Last updated: 2019-08-20Bibliographically approved
Liu, D., Pourrahimi, A. M., Pallon, L. K. H., Sanchez, C. C., Olsson, R. T., Hedenqvist, M. S., . . . Gedde, U. W. (2016). Interactions between a phenolic antioxidant, moisture, peroxide and crosslinking by-products with metal oxide nanoparticles in branched polyethylene. Polymer degradation and stability, 125, 21-32
Open this publication in new window or tab >>Interactions between a phenolic antioxidant, moisture, peroxide and crosslinking by-products with metal oxide nanoparticles in branched polyethylene
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2016 (English)In: Polymer degradation and stability, ISSN 0141-3910, E-ISSN 1873-2321, Vol. 125, p. 21-32Article in journal (Refereed) Published
Abstract [en]

Polyethylene composites based on metal oxide nanoparticles are emerging materials for use in the insulation of extruded HVDC cables. The short-term electrical performance of these materials is adequate, but their stability for extended service needs to be assessed. This study is focussed on the capacity of the nanoparticles to adsorb polar species (water, dicumyl peroxide and byproducts from peroxide-vulcanisation, acetophenone and cumyl alcohol) that have an impact on the electrical conductivity of nanocomposites, the oxidative stability by adsorption of phenolic antioxidants on the nanoparticles and the potential transfer of catalytic impurities from the nanoparticles to the polymer. The adsorption of water, dicumyl peroxide, acetophenone, cumyl alcohol and Irganox 1076 (phenolic antioxidant) on pristine and coated (hydrophobic silanes and poly(lauryl methacrylate)) Al2O3, MgO and ZnO particles ranging from 25 nm to 2 gm was assessed. Composites based on low-density polyethylene and the particles mentioned (<= 12 wt.%) were prepared, the degree of adsorption of Irganox 1076 onto the particles was assessed by OIT measurements, and the release of volatile species at elevated temperature was assessed by TG. The concentration of moisture adsorbed on the particles at 25 degrees C increased linearly with both increasing hydroxyl group concentration on the particle surfaces and increasing relative humidity. Dicumyl peroxide showed no adsorption on any of the nanoparticles. Acetophenone and cumyl alcohol showed a linear increase in adsorption with increasing concentration of hydroxyl groups, but the quantities were much smaller than those of water. Irganox 1076 adsorbed only onto the uncoated nanoparticles. Uncoated ZnO nanoparticles that contained ionic species promoted radical formation and a lowering of the OIT. This study showed that carefully coated pure metal oxide nano particles are not likely to adsorb phenolic antioxidants or dicumyl peroxide, but that they have the capacity to adsorb moisture and polar byproducts from peroxide vulcanisation, and that they will not introduce destabilizing ionic species into the polymer matrix. Low contents of dry, equiaxed ZnO and MgO particles strongly retarded the release of volatile species at temperatures above 300 degrees C.

Place, publisher, year, edition, pages
Elsevier, 2016
Keywords
Polyethylene, Metal oxide nanoparticles, Water, Acetophenone, Cumyl alcohol, Phenolic antioxidant, Adsorption
National Category
Polymer Technologies
Identifiers
urn:nbn:se:kth:diva-184031 (URN)10.1016/j.polymdegradstab.2015.12.014 (DOI)000370894900003 ()2-s2.0-84954186925 (Scopus ID)
Note

QC 20160324

Available from: 2016-03-24 Created: 2016-03-22 Last updated: 2017-11-30Bibliographically approved
Fogelström, L., Norström, E., Nordqvist, P., Khabbaz, F. & Malmström, E. (2016). Polysaccharides as green binders for wood adhesives. Abstracts of Papers of the American Chemical Society, 251
Open this publication in new window or tab >>Polysaccharides as green binders for wood adhesives
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2016 (English)In: Abstracts of Papers of the American Chemical Society, ISSN 0065-7727, Vol. 251Article in journal, Meeting abstract (Other academic) Published
Place, publisher, year, edition, pages
AMER CHEMICAL SOC, 2016
National Category
Organic Chemistry
Identifiers
urn:nbn:se:kth:diva-242679 (URN)000431903802555 ()
Note

QC 20190221

Available from: 2019-02-21 Created: 2019-02-21 Last updated: 2019-08-21Bibliographically approved
Malmström, E., Norström, E., Fogelström, L., Nordqvist, P. & Khabbaz, F. (2015). Can hemicelluloses be used for durable wood adhesives?. Abstract of Papers of the American Chemical Society, 249
Open this publication in new window or tab >>Can hemicelluloses be used for durable wood adhesives?
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2015 (English)In: Abstract of Papers of the American Chemical Society, ISSN 0065-7727, Vol. 249Article in journal, Meeting abstract (Other academic) Published
Place, publisher, year, edition, pages
AMER CHEMICAL SOC, 2015
National Category
Biological Sciences
Identifiers
urn:nbn:se:kth:diva-243691 (URN)000411186504738 ()
Note

QC 20190305

Available from: 2019-03-05 Created: 2019-03-05 Last updated: 2019-03-05Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0001-7132-3251

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