本研究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。本研究並探討水玻璃起始含量、pH值、抑制劑含量以及濃縮製程，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、穩定度及固含量之影響，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；進而找出最佳反應環境以及更高的轉化率。
本研究發現當二氧化矽透明溶膠的pH值在9~10.5時，溶膠穩定性極佳，並且pH值越低，其表面電荷越高，溶膠穩定性與分散性較佳，並且可進一步濃縮二氧化矽透明溶膠，提升其固含量，最高可濃縮至固含量30%。

The objective of this work was to prepare and characterize transparent nanosized silica hydrosols using sodium silicate solution as the monomer, ultrapure water as the solvent, and acidic cation exchange resin ( IR120 ) to produce activated silicate acid. We studied the influence of initiator, pH, inhibitor, and the process of concentration on the particle size, colloidal stability and solids content of the silica hydrosols. We discussed nucleation and growth of silica hydrosols by altering the reaction conditions, and collecting samples during different growth times. As a result of this study, we presented the optimum reaction conditions and conversion rate to produce stabilized transparent nanosized silica hydrosols.
This study showed that, when the pH of the silica sol in the range 9 to 10.5, the sol was very stable. Furthermore, the lower the pH, the higher the Zeta potential and, as a result, the better the sol stability. The silica dispersion can be further concentrated, to a higher solids content, and the maximum solids content was 30%.

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