Microviscosity of hydrophobically modified hydroxyethyl cellulose aqueous solutions.
The microviscosity of hydrophobically modified hydroxyethyl cellulose (HMHEC) aqueous solutions is experimentally determined by conductometry with added ions as probe. Compared to its bulk viscosity, the microviscosity of HMHEC solution could be lower by four orders of magnitude. Since the electric conductivity reduction of added NaCl is almost the same for HMHEC and its unmodified counterpart at an equal weight concentration, one can conclude that the hydrophobic modification for the polymer hardly has any effect on the solution's microviscosity.
Zhao
Guangqiang
G
Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117576, Republic of Singapore.
Chen
Shing Bor
SB