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Grafting-from cellulose nanocrystals via photoinduced Cu-mediated reversible-deactivation radical polymerization
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.ORCID iD: 0000-0002-8194-0058
2017 (English)In: Carbohydrate Polymers, ISSN 0144-8617, E-ISSN 1879-1344, Vol. 157, p. 1033-1040Article in journal (Refereed) Published
Abstract [en]

In this work we describe the grafting of cellulose nanocrystals (CNCs) by surface-initiated photoinduced Cu-mediated reversible-deactivation radical polymerization (RDRP). Initially, CNCs obtained through sulfuric acid hydrolysis were functionalized with a tertiary bromo-ester moiety as an initiating group for the subsequent RDRP of methyl acrylate, targeting three different degrees of polymerization for the polymer grafts: 50, 300 and 600. The polymerizations proceeded in DMSO in the presence of CuBr2 and Me6TREN as the catalytic system utilizing a UV source (λmax ≈ 360 nm). The technique proved highly versatile for the modification of CNCs with poly(methyl acrylate), where considerably high grafting was achieved in short reaction times (90 min), with simple purification steps. CNC morphology was maintained and polymer grafts were evident through FT-IR spectroscopy, thermal analysis, contact angle measurements, X-ray photoelectron microscopy and x-ray diffraction.

Place, publisher, year, edition, pages
Elsevier, 2017. Vol. 157, p. 1033-1040
Keywords [en]
Cellulose nanocrystals, Characterization, Nanoparticle compatibilization, Photoinduced polymerization, Polymer-grafted CNC, RDRP
National Category
Polymer Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-200999DOI: 10.1016/j.carbpol.2016.10.064ISI: 000391896800115Scopus ID: 2-s2.0-85006022123OAI: oai:DiVA.org:kth-200999DiVA, id: diva2:1072237
Note

QC 20170207

Available from: 2017-02-07 Created: 2017-02-07 Last updated: 2017-11-29Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
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  • vancouver
  • Other style
More styles
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  • de-DE
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