Abstract
Cellulose is the renewable, biodegradable and abundant resource and is suggested as an alternative material to silica due to the high price and environmental load of silica. The first step for cellulose aerogel production is to dissolve cellulose, and hydrated calcium thiocyanate molten salt is one of the most effective solvents for preparing porous material. Cellulose aerogels were prepared from dissolved cellulose samples of different degree of polymerization (DP) and drying methods, and tested with shrinkage, density and mechanical strength. Supercritical CO2 dried cellulose aerogels shrank less compared to freeze-dried cellulose aerogels, whereas the densities were increased according to the DP increases in both cellulose aerogels. Furthermore, scanning electron microscope (SEM) images showed that the higher DP cellulose aerogels were more uniform with micro-porous structure. Regarding the mechanical strength of cellulose aerogels, supercritical CO2 dried cellulose aerogels with higher molecular weight were much more solid.
Similar content being viewed by others
References
S. S. Kistler, Nature 227, 741 (1931).
B. J. C. Duchemin, M. P. Staiger, N. Tucker and R. H. Newman, J. Appl. Polym. Sci. 115, 216 (2009).
S. S. Kistler, J. Phy. Chem. 36, 52 (1932).
K. Letters, Colloid. Polym. Sci. 58, 229 (1932).
J. O. Warwicker and E. B. White, Shirley Institute Pamphlet (1966).
S. Fischer, H. Leipner, K. Thummler, E. Brendler and J. Peters, Cellulose 10, 227 (2003).
S. Hoepfner, L. Ratke and B. Milow, Cellulose 15, 121 (2008).
S. Kuga, J. Colloid. Interf. Sci. 77, 413 (1980).
H. Jin, Y. Nishiyama, M. Wada and S. Kuga, Colloids Surf. A 240, 63 (2004).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Lee, S., Kang, KY., Jeong, MJ. et al. Evaluation of supercritical CO2 dried cellulose aerogels as nano-biomaterials. Journal of the Korean Physical Society 71, 483–486 (2017). https://doi.org/10.3938/jkps.71.483
Received:
Published:
Issue Date:
DOI: https://doi.org/10.3938/jkps.71.483