本研究的主要目的是以具環氧基矽烷包覆奈米粒子，期望能製備穩定懸浮的無機-有機混成奈米粒子懸浮溶膠。再將無機-有機混成粒子懸浮溶膠塗佈塑膠表面製備硬質保護層。
實驗的步驟為先配製酸性的Boehmite或Silica奈米粒子懸浮溶膠，再以1當量的水預水解莫耳比1:0.6的Glycidoxypropyltri-methoxysilane(GPS)及Tetraethoxysilane(TEOS)矽烷溶液，然後將預水解後的GPS/TEOS矽烷溶液與奈米粒子懸浮溶膠混合，使GPS/TEOS包覆在奈米粒子表面成為無機-有機混成奈米粒子。根據實驗結果，以Bohemite奈米粒子懸浮溶膠混合預水解後的GPS/TEOS所製備的混成粒子懸浮溶膠只有少數粒子聚集，溶膠也不會凝膠。以氧化矽奈米粒子懸浮溶膠混合預水解後的矽烷所製備的混成粒子懸浮溶膠，GPS/Silica奈米粒子重量比小於0.8時混成粒子溶膠會凝膠，而GPS/Silica奈米粒子重量比大於1.0時雖然不會凝膠但有粒子聚集的情形，不過並不會發生粒子沈澱。
將無機-有機混成奈米粒子溶膠塗佈於PET(對苯二甲酸乙酯)透明塑膠片上製備硬質保護層。這層硬質層與PET附著良好不剝落也不龜裂。硬質層在研磨機上研磨1000轉後測量研磨前後硬質層足以增加塑膠的耐磨性，且不影響塑膠的透光度。

Coatings were prepared from a suspension of colloidal silica particles containing Glycidoxypropyltrimethoxysilane(GPS) and tetraethoxysilane(TEOS).The added to an aqueous silica or boeh-mite suspension.Acidic conditions relsulted in slower condensa-tion which allowed adsorption of the silane on Boehmite and Silica.Coatings with GPS modification were denser,adhered better to the polymer substrate,and could be made ticker than unmodified silica coatings.In general have to take place in organic solvents in order to control the hydrolysis and conden-sation reaction.This leads to drawbacks in applications,since
the organic solvent vapor concentration has to be controlled for example in coating applications for environmental,health or security reasons.For this reason,a reaction route has been develop to produce coating precursors stable against water as solvent.

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