1. Quantitative assessment of interactions between cellulose nanocrystals and water
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COST Action FP1205 “Cellulosic material properties with industrial potential”, Borås, Sweden, April 13th-14th 2016
Katri Kontturi, Elina Niinivaara, Eero Kontturi, and Tekla Tammelin

2. Objective of the study Ultrathin CNC films 
Nano-scale quantification of mass and thickness variations within cellulose nanocrystal (CNC) thin films during water uptake
Clarification of the possibilities and limitations of the selected analytical techniques
Ultrathin CNC films
fluid-flow/
evaporation
aqueous CNC suspension
ultrathin CNC film
500 nm
exhaust
substrate 
Film thickness ~10-40 nm
COST Action FT1205, Borås, Sweden, April 13th-14th 2016

3. Analytical techniques
Quartz Crystal Microgravimetry: recording of mass
Surface Plasmon Resonance: recording of refractive index
medium
Plasmon wave
medium
CNC film
CNC film
detection of
light intensity and SPR angle
resonating quartz crystal
light
ΔSPR angle ∝
refractive index
Δf ∝ Δm
The techniques complement each other reasonably well
Suitable for in-situ monitoring of CNC thin film water uptake
COST Action FT1205, Borås, Sweden, April 13th-14th 2016