(467b) Surface Structure Patterning for Fabricating Non-Fluorinated Super-Hydrophobic Cellulosic Membrane

Liu, W. - Presenter, Georgia Institute of Technology
Du, X., Georgia Institute of Technology
Zhang, Z., Georgia Institute of Technology
Deng, Y., Georgia Institute of Technology
Superhydrophobic surface have attracted great interesting in scientific and industry. Surface pattern-featured nano-cellulose membranes were fabricated by a simple pressing process. After chemical modified by non-fluorine chemicals, such as AKD, wax and isocyanates, the nano-cellulose membrane shows water contact angles greater than 150°. The micro-sized pattern and nano-sized cellulose fibers create a hierarchical structure that improves the superhydrophobic properties. SEM, optical microscopy and profile simulation were used to evaluate characters in the fiber network and hierarchical scale structures. Wetting testing experiments shows water droplets can roll off from the cellulose membrane, which may be used as liquid packaging materials. The process used in this superhydrophobic cellulose membrane fabrication is simple, cost effective and amenable to scale-up.