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Journal Article

Helical fibers via evaporation-driven self-assembly of surface-acylated cellulose nanowhiskers.


Dervisoglu,  R.
Department of NMR Based Structural Biology, MPI for biophysical chemistry, Max Planck Society;


Andreas,  L.
Research Group of Solid State NMR Spectroscopy-2, MPI for Biophysical Chemistry, Max Planck Society;

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Liu, H., Pang, B., Garces, R., Dervisoglu, R., Chen, L., Andreas, L., et al. (2018). Helical fibers via evaporation-driven self-assembly of surface-acylated cellulose nanowhiskers. Angewandte Chemie International Edition, 57(50), 16323-16328. doi:10.1002/anie.201808250.

Cite as: https://hdl.handle.net/21.11116/0000-0002-4B45-D
Many natural materials have helical or twisting shapes. In this work, we show the formation of helical fibers with the lengths of micrometers via evaporation-driven self-assembly of functionalized cellulose nanowhiskers (CNWs) with surface-attached acyl chains after drying on silicon wafers. The self-assembly process and the final helical structures were affected by a few critical parameters, which include the wettability of substrates, dispersing solvents, the amount of 10-undecenoyl groups, the crystallinity, the dimension of CNWs and the length of acyl chains. In particular, surface-acylated CNWs with the amount of 10-undecenoyl groups of a certain range (~3.52 mmol/g), an appropriate crystallinity (~40%), a length of ~135 nm and a diameter of around 4 nm preferentially self-assembled into explicit left-handed helical fibers from their THF suspensions on wafer. Thus, we showed on the one hand novel particular self-assembly behaviors of surface-acylated CNWs, and on the other hand we expanded the materials spectrum for the reconstruction of helical structures.