本研究第一部份係合成奈米級二氧化矽透明水溶膠，以四乙氧基矽烷為單體、超純水為溶劑，並加入界面活性劑十二烷基硫酸鈉降低油-水相之界面張力，當四乙氧基矽烷在水中經過水解和聚縮合反應後，加入氨水終止反應，即可得到奈米級二氧化矽透明水溶膠，實驗中並探討反應溫度、反應時間、氨水含量對二氧化矽水溶膠粒徑之影響。
第二部份則係將奈米級二氧化矽( Aerosil 200 )分散在醇類溶劑中，加入3-Aminopropyltriethoxysilane進行恆溫吸附，以紫外光/可見光 分光光度計可估算A-1100吸附在奈米級二氧化矽表面上的濃度、穿透式電子顯微鏡觀察改質後之奈米級二氧化矽粒子在有機相中之分散情形，並探討溶劑、溫度和pH等效應。

The first part of this work is to prepare and characterize transparent nanosized silica hydrosol using tetraethylorthosilicate ( TEOS ) as the monomer, double-deionized water as the solvent, and a small amount of surfactant SDS to reduce the interfacial tension of the O/W phase. After hydrolysis of TEOS followed by a condensation reaction in aqueous solution, ammonium hydroxide solution is added to terminate the sol-gel reaction. And the nanosized silica hydrosol is obtained. In this work, we also study the influence of reaction time, reaction temperature, and amount of ammonium hydroxide solution on the particle size and colloidal stability of the silica hydrosol.
The second part deals with the adsorption isotherm, in which silica nanoparticles are used as adsorbent, 3-Aminopropyltriethoxysilane ( A-1100 ) as adsorbate, and alcohol as solvent. The concentration of A-1100 adsorbed the surface of silica nanoparticles is calculated by UV-Visible spectrophotometer, and the silica dispersion is analyzed by Transmission Electron Microscopy. Finally, in this part of the work, the effects of different solvents, reaction temperature, and pH will be discussed.

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