Journal
CELLULOSE
Volume 23, Issue 1, Pages 811-821Publisher
SPRINGER
DOI: 10.1007/s10570-015-0856-z
Keywords
Cellulose acetate; Degree of substitution; Hydrophobicity; Liquid marble
Funding
- National Natural Science Foundation of China [31470598]
- Award Program for Minjiang Scholar Professorship
- Training Fund for Outstanding Young Scholars of Fujian Agriculture and Forestry University [xjq201421]
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Acetylated cellulose powders with varying degree of substitution (DS) were prepared by reacting cellulose with acetic anhydride. The effect of DS on the hydrophobic properties of acetylated cellulose was examined based on contact angle and mechanical stability measurements. The surface energy of the acetylated cellulose decreases with increasing DS, and for DS of 0.39, the acetylated cellulose was able to encapsulate a water droplet to form a liquid marble. The corresponding cellulose acetate powder-over-water spreading coefficient was ca. 8.9. Increasing DS also improved the mechanical stability of the liquid marble. This study opens important perspectives for the precise control of DS of cellulose acetate for various practical applications in membranes, filters, scaffolds, and textiles.
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