| Summary: | 碩士 === 國立中央大學 === 化學工程與材料工程學系 === 103 === In this study, (N,N-Dimethylaminopropyl)trimethoxysilane and 1,3-Propane sultone reacted to form Sulfobetaine silane(SBSi). SBSi is modified on glasses in the process of hydrolysis and condensation. By area and contact line variety to realize wetting behavior on SBSi substrates. Solution is divided into two sections, pure solution (water and hexadecane) and solution adding nonvolatile solute(cellobiose, poly(vinyl alcohol), poly(ethylene glycol), graphite oxide nanoparticle). Water spreads on SBSi substrates, area of water increasing. Then due to evaporation, area of water decreases. Hexadecane is nonvolatile solution. Hexadecane keeps spreading even passing an hour, area of hexadecane increasing. It indicates that SBSi substrates are superhydrophilic surfaces. Dipping solution on it, solution shows spontaneous spreading. Water and hexadecane are total wetting on SBSi substrates. When a SBSi substrate is placed in solution that with nonvolatile solute, bubble moves on substrates. As a result, it’s still total wetting. Nonvolatile solute deposition induces pinning behavior. In cellobiose, poly(vinyl alcohol) and graphite oxide nanoparticle solution experiments all indicate above results. Notably, poly(ethylene glycol)(PEG) solution is a special case. PEG solution doesn’t occur pinning behavior. Therefore, due to unequal evaporation rate, it can move non-directionally on level SBSi substrates. If let PEG solution deform, it can return to hemispherical shape no depending on another force. It shows that PEG solution is no hysteresis on SBSi substrates.
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