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Polymer Thermosets from Multifunctional Polyester Resins Based on Renewable Monomers
KTH, Skolan för kemivetenskap (CHE), Fiber- och polymerteknologi, Ytbehandlingsteknik.
KTH, Skolan för bioteknologi (BIO), Industriell bioteknologi.ORCID-id: 0000-0003-2644-0752
KTH, Skolan för bioteknologi (BIO), Industriell bioteknologi.ORCID-id: 0000-0002-2993-9375
KTH, Skolan för kemivetenskap (CHE), Fiber- och polymerteknologi, Ytbehandlingsteknik.ORCID-id: 0000-0003-3201-5138
2014 (engelsk)Inngår i: Macromolecular Chemistry and Physics, ISSN 1022-1352, E-ISSN 1521-3935, Vol. 215, nr 22, s. 2198-2206Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The use of monomers based on natural materials as a future supply of raw materials has gained more interest in the last decade. Sources ranging from wood to plant oils and algae are exploited as alternatives to traditional fossil-based resources for the synthesis of polymeric materials. The use of these raw materials is not only of interest because of its abundance, but also in terms of price, durability, and/or biodegradability. In the present study, a series of resins utilizing a monomer derived from birch bark is prepared. The thermoset resins are formed by reacting an epoxy-functional omega-hydroxy fatty acid with methacrylate monomers using enzyme catalysis to form multifunctional resins via a one-pot synthesis. The derived oligomers are crosslinked through different polymerization routes to produce thermosets with different properties and/or functionalities. This approach allows natural-based resins with tuned functionalities and mechanical and thermal properties to be obtained.

sted, utgiver, år, opplag, sider
2014. Vol. 215, nr 22, s. 2198-2206
Emneord [en]
dual curing, enzymatic catalysis, renewable monomers, suberin
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-158419DOI: 10.1002/macp.201400192ISI: 000345444200006Scopus ID: 2-s2.0-84913620344OAI: oai:DiVA.org:kth-158419DiVA, id: diva2:776200
Merknad

QC 20150107

Tilgjengelig fra: 2015-01-07 Laget: 2015-01-07 Sist oppdatert: 2024-03-15bibliografisk kontrollert
Inngår i avhandling
1. Telechelic polymers derived from natural resources as building blocks for polymer thermosets
Åpne denne publikasjonen i ny fane eller vindu >>Telechelic polymers derived from natural resources as building blocks for polymer thermosets
2015 (engelsk)Licentiatavhandling, med artikler (Annet vitenskapelig)
sted, utgiver, år, opplag, sider
Stockholm: KTH Royal Institute of Technology, 2015. s. 39
Serie
TRITA-CHE-Report, ISSN 1654-1081 ; 2015:13
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-162128 (URN)978-91-7595-469-1 (ISBN)
Presentation
2015-03-27, K1, Teknikringen 56, Stockholm, 13:00 (engelsk)
Opponent
Veileder
Merknad

QC 20150323

Tilgjengelig fra: 2015-03-23 Laget: 2015-03-23 Sist oppdatert: 2022-06-23bibliografisk kontrollert
2. Sustainable synthetic pathways towards the formation of bio-based polymeric materials
Åpne denne publikasjonen i ny fane eller vindu >>Sustainable synthetic pathways towards the formation of bio-based polymeric materials
2016 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

Increasing environmental and social awareness arising from the use of oil as main source of raw materials, has awaken the interest of many scientists to explore new synthetic pathways for polymer production. These new approaches embrace the use of alternative feedstock and sustainable synthetic routes aiming for enhancing biodegradability and recyclability. This shift towards more benign strategies is considered positive from different perspectives. Through the exploitation of bio-based feedstock it is possible to minimize the carbon foot print at the same time as new tools for material formation are provided. The use of selective catalysts reduces the formation of side-products, minimizes or avoids the use of solvents and diminish energy consumption. At the same time, new polymeric structures can be formed in terms of functionality and architectures.  

The work herein presented have focused on the development of sustainable synthetic routes for the formation of bio-based polymeric materials with targeted properties. In order to afford this, two bio-sources have been explored for the retrieval of different epoxy-fatty acids, i.e. outer birch bark and vegetable oils. In order to be able to tailor the final material properties and thus be able to target specific applications, we have relied on the selectivity of lipases to preserve the epoxy-functionalities during synthesis. Through the design of specific polymer architectures, e.g. telechelic oligomers, and branched or linear macromers, different degrees of functionality could be prepared. By covalently reacting the epoxy groups through different polymerization techniques, polymer networks were achieved. The proposed synthetic approach resulted in polymeric materials with wide variety of properties ranging from functional networks, to high Tg materials and adhesives, prepared all from renewable sources. This also proved the benefits of the use of lipases in synthesis of polymers for material applications.  

sted, utgiver, år, opplag, sider
Stockholm: KTH Royal Institute of Technology, 2016. s. 61
Serie
TRITA-CHE-Report, ISSN 1654-1081 ; 2016:38
Emneord
bio-based, polymers, materials
HSV kategori
Forskningsprogram
Kemi
Identifikatorer
urn:nbn:se:kth:diva-195079 (URN)978-91-7729-173-2 (ISBN)
Disputas
2016-12-02, F3, Lindstedtsvägen 26, Stockholm, 10:00 (engelsk)
Opponent
Veileder
Merknad

QC 20161101

Tilgjengelig fra: 2016-11-01 Laget: 2016-11-01 Sist oppdatert: 2022-06-27bibliografisk kontrollert
3. Building blocks for polymer synthesis by enzymatic catalysis
Åpne denne publikasjonen i ny fane eller vindu >>Building blocks for polymer synthesis by enzymatic catalysis
2017 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

The search for alternatives to oil-based monomers has sparked interest for scientists to focus on the use of renewable resources for energy production, for the synthesis of polymeric materials and in other areas. With the use of renewable resources, scientists face new challenges to first isolate interesting molecules and then to process them.

Enzymes are nature’s own powerful catalysts and display a variety of activities. They regulate important functions in life. They can also be used for chemical synthesis due to their efficiency, selectivity and mild reaction conditions. The selectivity of the enzyme allows specific reactions enabling the design of building blocks for polymers.

In the work presented here, a lipase (Candida antarctica lipase B (CalB)) was used to produce building blocks for polymers. An efficient route was developed to selectively process epoxy-functional fatty acids into resins with a variety of functional groups (maleimide, oxetane, thiol, methacrylate). These oligoester structures, based on epoxy fatty acids from birch bark and vegetable oils, could be selectively cured to form thermosets with tailored properties.

The specificity of an esterase with acyl transfer activity from Mycobacterium smegmatis (MsAcT) was altered by rational design. The produced variants increased the substrate scope and were then used to synthesize amides in water, where the wild type showed no conversion. A synthetic procedure was developed to form mixed dicarboxylic esters by selectively reacting only one side of divinyl adipate in order to introduce additional functional groups.

sted, utgiver, år, opplag, sider
Stockholm: KTH Royal Institute of Technology, 2017. s. 61
Serie
TRITA-BIO-Report, ISSN 1654-2312 ; 2017:15
Emneord
Enzyme, Enzyme Engineering, Biocatalysis, Lipase, CalB, MsAcT, Substrate specificity, Selectivity, Polymer Chemistry, Polymer Synthesis
HSV kategori
Forskningsprogram
Bioteknologi
Identifikatorer
urn:nbn:se:kth:diva-212499 (URN)978-91-7729-494-8 (ISBN)
Disputas
2017-09-22, Kollegiesalen, Brinellvägen 8, Stockholm, 10:00
Opponent
Veileder
Merknad

QC 20170823

Tilgjengelig fra: 2017-08-23 Laget: 2017-08-22 Sist oppdatert: 2022-06-27bibliografisk kontrollert

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