本研究將探討如何合成以水為連續相之奈米級二氧化矽透明溶膠，利用水玻璃( Sodium silicate solution )為起始劑並以超純水為溶劑，經由離子交換樹酯後，進行反應即可得到穩定奈米級二氧化矽溶膠。本研究並探討反應溫度、反應時間、離子交換程度以及偶合劑含量，藉由實驗變數的控制來探討其成核及成長之機構，以及對水性二氧化矽溶膠粒徑及穩定度之影響，在實驗中分別改變顆粒成長的條件，並藉由在不同成長時間的取樣，來觀察實驗變數對矽酸膠成核與成長的影響；進而找出最佳反應條件。

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.

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