Dynamics of ultrasonically induced birefringence of in rod-like colloidal solutions.
This review summarized our experimental studies of ultrasonically induced birefringence on aqueous solution of rigid rod-like colloids and rod-like micelles from the view point of dynamics of particle orientation. For rigid rod-like colloids in dilute concentration, the orientational relaxation time was described in terms of the Debye-Einstein equation. This indicated that the ultrasonically induced birefringence could be one of useful tools for determining the size of particles of anisotropic shape. For rod-like micelles, the birefringence showed anomalous damping oscillation when the rod-like micelle was in an entangling state. The mechanism of damping oscillation was discussed using the results of the rheological measurements.
Matsuoka
Tatsuro
T
Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan. matsuoka@nuce.nagoya-u.ac.jp
Yasuda
Keiji
K
Yamamoto
Ken
K
Koda
Shinobu
S
Nomura
Hiroyasu
H
D001718:Birefringence; D000077286:Cetrimonium; D002593:Cetrimonium Compounds / Q000737:chemistry; D003102:Colloids / Q000737:chemistry*; D007700:Kinetics; D008823:Micelles; D008956:Models, Chemical; D012212:Rheology / Q000379:methods; D012980:Sodium Salicylate / Q000737:chemistry; D012996:Solutions / Q000737:chemistry*; D013696:Temperature; D014465:Ultrasonics; D014867:Water / Q000737:chemistry
D002593:Cetrimonium Compounds; D003102:Colloids; D008823:Micelles; D012996:Solutions; D014867:Water; D012980:Sodium Salicylate; D000077286:Cetrimonium