We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Colloidal particle size of fumed silica dispersed in solution and the particle size effect on silica gelation and some electrochemical behaviour in gelled electrolyte.
- Authors
Sun, Xiaoxiang; Zhao, Jianxi; Chen, Tixian; Liu, Xiaowei
- Abstract
Commercial-grade fumed silica was dispersed by mechanical shearing and/or ultrasonic force to produce dispersed silica particles with different sizes. The light-scattering technique and a diagrammatic method of extrapolation used to eliminate the influence of particle interaction were applied to determine the size of the particles. Then, the effect of particle size on the gelation of fumed silica in sulphuric acid medium, as well as some electrochemical properties, such as ion transfer and redox capacities of lead, in the gelled electrolyte were examined. The results showed that the size of dispersed particles affected the gelation of fumed silica itself: with increasing size, the thixotropy of the system increased and the gelling time decreased, particularly for those particles obtained only by simple stirring. The strength of the gel increased with increasing particle size. At an identical silica content, the increase in particle size led to a decrease in the density of the particles: this weakened the three-dimensional structure of the silica particle network and reduced the efficiency of ion transfer. However, the effect of silica particle size on the redox capacities of lead was negligible.
- Subjects
PARTICLE size determination; PARTICLE size distribution; ION analysis; GELATION; SILICA gel
- Publication
Journal of Solid State Electrochemistry, 2016, Vol 20, Issue 3, p657
- ISSN
1432-8488
- Publication type
Article
- DOI
10.1007/s10008-015-3090-6