Journal
SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS
Volume 18, Issue 1, Pages 316-324Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/14686996.2017.1314776
Keywords
Coffee ring; colloid; particle; cellulose; nanofiber; ink; drop; film; soft matter; mesoscale
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Funding
- [26709008]
- Grants-in-Aid for Scientific Research [26709008] Funding Source: KAKEN
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We report that the addition of a small amount of cellulose nanofibers (CNFs) into an aqueous dispersion of colloidal particles suppresses the coffee-ring effect when the dispersion dries on a solid substrate, as revealed by the computational analysis of experimental time-series images and by particle image velocimetry. The addition of CNFs is much more effective than the increase of colloidal particle concentration at the same weight percentage; it is also more environment friendly than the use of typical molecular surfactants. This finding is promising for the fabrication of metamaterials from colloidal dispersions and for ink printing in electronics, where CNFs can also serve as a substrate for flexible devices.
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