Equipe Physico-Chimie des Polymères / Polymer Chemical Physics

Equipe Physico-Chimie des Polymères / Polymer Chemical Physics Team
CEMEF – Mines ParisTech http://www.cemef.mines-paristech.fr/ ©
Diffusion coefficients of NaOH and NMMO during regeneration of
Avicel/8%NaOH/water gels and Solucell/NMMO solutions in a water bath of 25°C.
Cellulose concentration, wt% 0 3 5 6 7
D
NaOH
, × 10
-10
m
2
/s 15.1
a)
2.09 1.42 1.21 1.10
Cellulose
concentration,
wt%
0 0.3 1.1 2.3 3 6
c)
8
c)
10
c)
12
c)
D
NMMO
, × 10
-
10
m
2
/s 7.04
b)
1.42 1.31 1.20 1.25 1.10 0.98 0.81 0.50
a) Taken from: Handbook of Tables for Applied Engineering Science, 2nd ed.; CRC, Press:
Boca Raton, FL, 1983.
b) Calculated from the size of NMMO, using Stoke-Einstein formula.
c) Taken from: Biganska, O.; Navard, P. Biomacromolecules 2005, 6, 1948.
R.GAVILLON, T.BUDTOVA
« Kinetics of cellulose regeneration from cellulose-NaOH-water gels and comparison with cellulose-NMMO-
water solutions », Biomacromolecules, 8, 424-432 (2007).
R.GAVILLON.
PhD thesis. Ecole des Mines de Paris, Sophia-Antipolis, France, 2007.