Dynamic moduli change of aluminum hydroxide sol during sol-gel transition |
| |
Authors: | Ki Chang Song In Jae Chung |
| |
Affiliation: | (1) Department of Chemical Engineering, Keonyang University, Nonsan, Chungnam, Korea;(2) Department of Chemical Engineering, Korea Advanced Institute of Science & Technology, Yusung, Taejon, Korea |
| |
Abstract: | Aluminum hydroxide sol was prepared by the sol-gel method. Dynamic moduli such as storage and loss moduli were measured to
investigate the relative dominance of elastic and viscous contributions to the viscoelastic response of aluminum hydroxide
sol during sol-gel transition. The loss modulus, a measure of viscous response. is larger than the storage modulus, a measure
of elastic response, for the sols of low particle concentrations. But at a high particle concentration above 15.3 wt%, the
storage modulus is found to be larger than the loss modulus. This inversion from a viscous to an elastic response with the
increase of particle concentration is attributable to the formation of gel structures by the aggregation of dispersed particles |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|