Doktorand - Syntes av blocksampolymerer för cellulosamodifier
Kungliga Tekniska Högskolan , KTH Kemivetenskap / Kemiingenjörsjobb / Stockholm
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Skolan för kemivetenskap omfattar områdena kemi, kemiteknik samt fiber- och polymerteknologi. Skolans verksamhet innefattar såväl grund- som tillämpad kemivetenskaplig forskning för en hållbar utveckling genom vetenskaplig excellens. Många forskningsaktiviteter är tvärdisciplinära och spänner från kemivetenskap till materialvetenskap, energiteknik, miljövetenskap, biokemi, biologi och medicin. Skolan ansvarar för civilingenjörsutbildningen i teknisk kemi, högskoleingenjörsutbildningen i kemiteknik och tekniskt basår samt för tre engelskspråkiga mastersprogram, kemiteknik för energi och miljö, makromolekylära material och molekylär vetenskap och teknik. Vi medverkar även med kurser i civilingenjörsprogrammen energi och miljö, materialdesign och bioteknik.
Publiceringsdatum2014-05-06ArbetsuppgifterWith the environmental awareness towards a sustainable society, great efforts are nowadays invested to replace conventional plastics and therefore decreasing the dependency of materials generated from fossilfuel. In fibre reinforced composites it is vital to have a thorough mixing between the fibres/fibrils and the polymer matrix. It is then necessary to have a high adhesion between the reinforcing fibres/fibrils and the elastic matrix polymer to fully utilize the inherent potential of the reinforcing fibres/fibrils and the polymers matrix. In order to manage a mixing of a high surface energy fibre/fibril in a low surface energy polymer matrix it is necessary to decrease the surface energy of the solid. Furthermore, it is essential that the mixing of the fibres/fibrils is combined with a tailoring of the adhesive interaction between the materials. A
promising route for creating strong adhesive interactions between solids is the double network concept where a crosslinked polymer network is intermixed with a non-crosslinked polymer to create extraordinary strong double network gels with excellent adhesive properties. In this approach the crosslinked polymers is attached to the solid fibre/fibril and a non-crosslinked polymer is then allowed to migrate into the gel to create a strong and tough adhesive joint. On a higher structural level is has recently also been shown that a larger number of contacts in the contact zone will further improve the pull-off force and work of adhesion between contacting solids and one way of creating such a mesostructure at the interface is the use of tailored block copolymers.
The current WWSC position, funded by Knut and Alice Wallenberg Foundation, will be devoted to a molecular tailoring of the adhesion between fibres and fibrils and between fibres/fibrils and matrix polymers to create strong and tough adhesive joints in nanocomposites by surface modification with polymer chains. Utilizing various polymerization methods such as controlled radical polymerization (CRP) and ring-opening polymerization as well as efficient coupling chemistries, such as click-chemistry, a library of tailored-made block copolymers will be synthesized. The polymers will be adsorbed onto fibers and fibrils and the adhesive properties of the systems will be investigated. Additionally, different architectures of the blockcopolymers will also be explored, such as tri-and penta-blocks, star-shaped and dendritic polymers.
The application should be marked with reference number, clearly specify the specific position being applied for, and must include the following:
1. CV including education and relevant academic/work experience
2. Official record of transcripts and copy of degree certificate
3. Cover letter (maximum 2 pages) with a short description of interest in the scientific studies and the specific research field
KvalifikationerThis project is dedicated towards designing and synthesizing a library of various block copolymers for a) meso-structuring of the interface between polymers and fibrils and b) for optimizing the adhesion between the interfaces.
M.Sc. degree in polymer science and engineering or similar areas. The project is synthetically intensive and includes synthesis of well-defined polymers and their structural characterization via traditional analytical techniques e.g. NMR, SEC, MALDI-TOF, DSC/TGA, FTIR, DLS etc. Documented experience of polymer synthesis via CRP, ROP, ROMP, click chemistry etc, will be regarded as advantageous when evaluating the applicant. Additional documentation on the modification of biofibers and surfaces will also be considered to the applicants favor. The candidate should be structured and creative, be able to work independently, meet agreed deadlines and critically analyze information.
Arbetstider och omfattningHeltid. Tidsbegränsad anställning
ErsättningEnligt avtal.
Så ansöker duSista dag att ansöka är 2014-05-18
Ange följande referens när du ansöker: K-2014-0273
Klicka på denna länk för att göra din ansökanKontaktMaria Salling, Academic Work, Rekryteringskonsult
maria.salling@academicwork.seFöretagKungliga Tekniska högskolan , KTH Kemivetenskap
AdressKungliga Tekniska högskolan , KTH Kemivetenskap
Brinellvägen 8
10044 Stockholm
Kontorsadress10044 Stockholm
Jobbnummer 1863519
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