Cellulose block copolymers
Reeta Salminen and Eero KontturiThe Department of Forest
Products Technology
COST Action San Sebastian/Donostia 26th-27th May 2014Cellulose
nanocrystal submonolayers1exposure to different conditionsnew
functional materialsself-assembly
patternsderivatisationIntroduction and motivationDepartment of
Forest Products Technology Reeta Salminen25.05.20152
mSubmonolayers = surface not fully covered with deposited
materialExposed surfaceCNCobservation on a single crystal
level2Experimental setting
Silica wafer is cationized with (3-aminopropyl)trimethoxysilane
(APTS)Cellulose nanocrystals (CNC) are spin coated on the
APTS-surfaceHCl (aq), 37 %H2O (l),submonolayers not oven curedHCl
(g)Samples analyzed with atomic force microscopy (AFM) before and
after exposure to an environment25.05.2015Department of Forest
Products Technology Reeta Salminen33
Example of resultsDepartment of Forest Products Technology Reeta
Salminen25.05.20154HCl (g)
mm
m
mHCl (aq), 37 %25 mg/land conlusionsAPTS adsobs CNC very
efficientlyOven curing not necessaryThe formed submonolayers are
resistant against HCl vapour, aqueous HCl and waterH2O
(l),submonolayers not oven cured4Thank you!Department of Forest
Products Technology Reeta Salminen5
