Adhesion dynamics for cellulose nanocomposites.
The efficiency of poly(ε-caprolactone) (PCL) as a matrix polymer for cellulose nanocomposites has been investigated at the macromolecular contact level using atomic force microscopy in a colloidal probe configuration. Model cellulose microspheres grafted with PCL were prepared via ring-opening polymerization. Force measurements between the functionalized particles revealed the adhesion to be highly dependent on the contact time because of a diffusion-controlled mechanism. Moreover, an increase of the temperature to 60 degrees C (close to T(m) for the PCL graft) greatly enhanced the adhesion at the polymer-polymer interface, demonstrating the importance of entanglements in the annealing of composite materials.
Nordgren
Niklas
N
Lönnberg
Hanna
H
Hult
Anders
A
Malmström
Eva
E
Rutland
Mark W
MW
D000327:Adsorption; D002482:Cellulose / Q000737:chemistry* / Q000378:metabolism*; D018625:Microscopy, Atomic Force; D053761:Nanocomposites / Q000737:chemistry*; D011091:Polyesters / Q000737:chemistry* / Q000378:metabolism*; D013997:Time Factors
D011091:Polyesters; C016240:polycaprolactone; D002482:Cellulose