Journal
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
Volume 28, Issue 6, Pages 837-844Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/01932690701341827
Keywords
pickering emulsions; microfibrillated cellulose (MFC); hydrophobication; water-in-oil; emulsions; particle wettability
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The properties of water-in-toluene emulsions stabilized solely by hydrophobized microlibrillated cellulose (MFC) were investigated. By varying the degree of surface substitution (DSS), the wettability of the MFC was altered. All emulsions prepared with MFC displayed excellent stability to coalescence. The stability to gravity-induced sedimentation increased with increasing MFC concentration, the highest stability being obtained with MFC of moderate hydrophobicity. Drop sizes increased with increasing DSS, with a corresponding decrease in stability to sedimentation. An increase in the toluene:water ratio at constant MFC concentration resulted in a decrease in the average drop size. For all emulsions, the polydispersity in drop size decreased with decreasing average drop diameter.
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