Unformatted text preview: two-step treatment method improved the amount of chemisorbed coupling agents, with the degree of improvement depending on the pH value of the treatment environment. Kamiya et al. (2004) reported that the diameter of silica particles significantly affected their surface properties. In this thesis study, a silane application guide from the producer of the agent was followed (Advanced Polymer, INC., 2009). The treatment environment was kept pH neutral. The concentration of the aqueous silane solution was 3.5%. The amount of required silane was calculated based on the following equation: where M is the amount of silane, m is amount of silica, A is the surface area of silica and A c is the minimum coating area of silane coupling agent. In our study, the surface area of M=m * A / A c...
View Full Document
- Spring '08
- Oxide, Silica and Graphite Treatments, silane coupling