Novel nanocomposite concept based on cross-linking of hyperbranched polymers in reactive cellulose nanopaper templates
2011 (English)In: Composites Science And Technology, ISSN 0266-3538, Vol. 71, no 1, 13-17 p.Article in journal (Refereed) Published
Cellulosic fibers offer interesting possibilities for good interfacial adhesion due to the high density of hydroxyl groups at the surface. in the present study, the potential of a new nanocomposite concept is investigated, where a porous cellulose nanofiber network is impregnated with a solution of reactive hyperbranched polyester. The polymer is chemically cross-linked to form a solid matrix. The resulting nanocomposite structure is unique. The matrix surrounds a tough nanopaper structure consisting of approximately 20 nm diameter nanofibers with an average interfiber distance of only about 6 nm. The cross-linked polymer matrix shows strongly altered characteristics when it is cross-linked in the confined space within the nanofiber network, including dramatically increased T-g, and this must be due to covalent matrix-nanofiber linkages.
Place, publisher, year, edition, pages
2011. Vol. 71, no 1, 13-17 p.
nano composites, fibre/matrix bond, interface, dynamic mechnical thermal analysis
IdentifiersURN: urn:nbn:se:kth:diva-13488DOI: 10.1016/j.compscitech.2010.09.006ISI: 000285904100003ScopusID: 2-s2.0-78649715826OAI: oai:DiVA.org:kth-13488DiVA: diva2:325828
QC 20100621. Updated from submitted to published 20120326. Previous title: Novel Nanocomposite Concept based on Hyperbranched Polymers in Reactive Cellulose Nanopaper Templates2010-06-212010-06-212012-03-26Bibliographically approved