Preparation and Characterization of Nano Silica Dispersions

• Main Authors: Chung-Chieh Lee, 李仲傑
• Other Authors: Chorng-Shyan Chern
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/24735928821631525103

碩士 === 國立臺灣科技大學 === 化學工程系 === 97 === The main objective of this work is to prepare and characterize transparent nanosized silica hydrosol using sodium silicate solution as the monomer, ultrapure water as the solvent, and acid cation exchange resin ( IR120 ) to produce activated silicate acid. We also study the influence of reaction time, reaction temperature, the extent of ion exchange, and amount of silane added on the particle size and colloidal stability of the silica hydrosols. We study nucleation and growth of silica hydrosols by altering the reaction conditions, and collecting data during different growth time. The optimum reaction conditions to produce stable transparent nanosized silica hydrosols are presented.