Surface modification of cellulose nanocrystals by grafting with poly(lactic acid)
2014 (English)In: Polymer international, ISSN 0959-8103, E-ISSN 1097-0126, Vol. 63, no 6, 1056-1062 p.Article in journal (Refereed) Published
The use of biopolymers obtained from renewable resources is currently growing and they have found unique applications as matrices and/or nanofillers in 'green' nanocomposites. Grafting of polymer chains to the surface of cellulose nanofillers was also studied to promote the dispersion of cellulose nanocrystals in hydrophobic polymer matrices. The aim of this study was to modify the surface of cellulose nanocrystals by grafting from L-lactide by ring-opening polymerization in order to improve the compatibility of nanocrystals and hydrophobic polymer matrices. The effectiveness of the grafting was evidenced by the long-term stability of a suspension of poly(lactic acid)-grafted cellulose nanocrystals in chloroform, by the presence of the carbonyl peak in modified samples determined by Fourier transform infrared spectroscopy and by the modification in C1s contributions observed by X-ray photoelectron spectroscopy. No modification in nanocrystal shape was observed in birefringence studies and transmission electron microscopy.
Place, publisher, year, edition, pages
2014. Vol. 63, no 6, 1056-1062 p.
grafting-from, surface modification, cellulose nanocrystals, ring-opening polymerization, L-lactide
IdentifiersURN: urn:nbn:se:kth:diva-146133DOI: 10.1002/pi.4610ISI: 000335568500016ScopusID: 2-s2.0-84899961389OAI: oai:DiVA.org:kth-146133DiVA: diva2:722793
QC 201406092014-06-092014-06-092014-06-09Bibliographically approved