S1 Supplementary Information High Modulus Regenerated Cellulose Fibers Spun from a Low Molecular Weight Microcrystalline Cellulose Solution Chenchen Zhu 1 , Robert M Richardson 2 , Kevin D Potter 1 , Anastasia F Koutsomitopoulou 1 , Jeroen S van Duijneveldt 3 , Sheril R Vincent 1 , Nandula D Wanasekara 4 , Stephen J Eichhorn 4* , Sameer S Rahatekar 1* 1. Advanced Composites Centre for Innovation and Science (ACCIS), Department of Aerospace Engineering, University of Bristol, Queen’s Building, University Walk, Bristol BS8 1TR, UK 2. H H Wills Physics Laboratory, Physics Department, University of Bristol, Tyndall Avenue, Bristol BS8 1TL, UK 3. School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, UK 4. College of Engineering, Maths and Physical Sciences, University of Exeter, Stocker Road, Exeter EX4 4QL, UK Total number of pages: 10 (S1-S10) including 3 Equations, 7 Figures and 0 Tables.
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S1
Supplementary Information
High Modulus Regenerated Cellulose Fibers Spun
from a Low Molecular Weight Microcrystalline
Cellulose Solution
Chenchen Zhu1, Robert M Richardson
2, Kevin D Potter
1, Anastasia F Koutsomitopoulou
1,
Jeroen S van Duijneveldt3, Sheril R Vincent
1, Nandula D Wanasekara
4, Stephen J
Eichhorn4*
, Sameer S Rahatekar1*
1. Advanced Composites Centre for Innovation and Science (ACCIS), Department of
Aerospace Engineering, University of Bristol, Queen’s Building, University Walk, Bristol
BS8 1TR, UK
2. H H Wills Physics Laboratory, Physics Department, University of Bristol, Tyndall
Avenue, Bristol BS8 1TL, UK
3. School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, UK
4. College of Engineering, Maths and Physical Sciences, University of Exeter, Stocker Road,
Exeter EX4 4QL, UK
Total number of pages: 10 (S1-S10) including 3 Equations, 7 Figures and 0 Tables.
S2
25 °C 40 °C 60 °C
70 °C 75 °C 80 °C
Clearing Temperature of Cellulose/EMImDEP Solutions
When the solutions are heated above the clearing temperature (Tc)1, the solution becomes
isotropic and the anisotropy pattern disappears. To study Tc, 12.4 wt%, 15.2 wt% and 18.0
wt% cellulose/EMImDEP solutions were heated from 25 °C to 90 °C, while polarized optical
micrographs were taken at different temperatures, respectively (Figure S1-3). The anisotropy
of cellulose/EMImDEP solutions diminished gradually as the temperature increased and
finally disappeared at Tc. For the 12.4 wt% and 15.2 wt% cellulose/EMImDEP solutions, 75
°C< Tc <80 °C (Figure S1-2); while for the 18.0 wt% solution, 85 °C< Tc <90 °C (Figure S3).
Given these differences in Tc, a fiber spinning temperature of 80 °C was used for further