TY - JOUR
T1 - Cellulose porosity improves its dissolution by facilitating solvent diffusion
AU - Hu, Yang
AU - Acharya, Sanjit
AU - Abidi, Noureddine
N1 - Funding Information:
The authors thank Texas Tech University for its partial financial support. The authors also thank Mrs. Hbe (Erandi) Rajakaruna for her help in GPC measurement.
Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2019/2/15
Y1 - 2019/2/15
N2 - This paper reports on the effect of improved porous characteristics of cellulose on its solubility in DMAc/LiCl. The use of freeze-drying (FD) treatment led to higher surface area and void fraction of volume for high-molecular-weight (HMW) cotton cellulose (DP~5000). Improvement in porous characteristics of cellulose did not change the chemical and crystalline structures of cellulose, as compared to hot-drying (HD) treatment. However, significant improvement in the dissolution of FD-HMW cellulose in DMAc/LiCl was observed under relatively low temperature (80 °C). The relationship between the solubility and the porous characteristics of cellulose was discussed using Stokes-Einstein Equation and effective diffusion coefficient equation. It was concluded that the increase in the diffusion coefficient of the solvent and the improvement in the porous characteristics of cellulose played key roles to enhance the diffusion rate of the solvent through the cellulose molecular network.
AB - This paper reports on the effect of improved porous characteristics of cellulose on its solubility in DMAc/LiCl. The use of freeze-drying (FD) treatment led to higher surface area and void fraction of volume for high-molecular-weight (HMW) cotton cellulose (DP~5000). Improvement in porous characteristics of cellulose did not change the chemical and crystalline structures of cellulose, as compared to hot-drying (HD) treatment. However, significant improvement in the dissolution of FD-HMW cellulose in DMAc/LiCl was observed under relatively low temperature (80 °C). The relationship between the solubility and the porous characteristics of cellulose was discussed using Stokes-Einstein Equation and effective diffusion coefficient equation. It was concluded that the increase in the diffusion coefficient of the solvent and the improvement in the porous characteristics of cellulose played key roles to enhance the diffusion rate of the solvent through the cellulose molecular network.
KW - Cellulose dissolution
KW - Porous characteristics
KW - Solvent diffusivity
UR - http://www.scopus.com/inward/record.url?scp=85055619593&partnerID=8YFLogxK
U2 - 10.1016/j.ijbiomac.2018.10.062
DO - 10.1016/j.ijbiomac.2018.10.062
M3 - Article
C2 - 30342150
AN - SCOPUS:85055619593
VL - 123
SP - 1289
EP - 1296
JO - International Journal of Biological Macromolecules
JF - International Journal of Biological Macromolecules
SN - 0141-8130
ER -