Comparative study of covalent grafting and physical adsorption of PCL onto cellulose
2012 (English)Conference paper (Refereed)
In this work, an investigation concerning differences between covalent and physical attachment of poly(ε-caprolactone) (PCL) to a nanocellulose modell surface was conducted. For the covalent attachment, ring-opening polymerization (ROP) was performed using the “grafting-from” approach, building the polymer from the surface. For the physical attachment, a block copolymer consisting of PCL and poly(di(methylamino)ethyl methacrylate) (PDMAEMA) was made combining ROP and atom transfer radical polymerization (ATRP). The PDMAEMA-part was then quaternized, which resulted in a charged chain – a polyelectrolyte. The charges allow for the PDMAEMA-PCL copolymer to be adsorbed onto the nanocellulose modell surface. The length of the PDMAEMA-part was kept constant (DP=20), and the length of PCL was varied (DP=150, 300, 600) for both the covalently attached polymer and for the copolymer. Finally, differences between the two approaches were evaluated regarding for example surface coverage and grafting/physiosorption efficiency investigated with techniques such as atomic force microscopy.
Place, publisher, year, edition, pages
IdentifiersURN: urn:nbn:se:kth:diva-92626OAI: oai:DiVA.org:kth-92626DiVA: diva2:514065
ACS National meeting San Diego, March 25-29, 2012
QC 201204112012-04-162012-04-052014-10-03Bibliographically approved