Application of organic - inorganic hybrid composites material via sol - gel reaction
| Autor: | Zheng-Wei Liu, 劉正偉 |
|---|---|
| Rok vydání: | 2017 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 105 In this study, to development a series of novel materials that can protect the surface of the rock, polycarbonate and polyethylene terephthalate. In part I, silane-modified resin (epoxy-silane resin, ES) was synthesized by 3-Aminopropyl trimethoxy silane (APS), 3-Glycidyloxypropyl trimethoxy silane (GPS), diglycidyl ether of bisphenol A (DGEBA) and polytetramethylene ether glycol 2000 (PTMEG 2000) via polycondensation reaction. The Si-O-Si bond was formed between the resin and the rock via sol-gel reaction in order to strength the sandstone surface’s mechanical properties and weatherability. Furthermore, the nano silicate platelets (NSP) were also involved into the system for the purpose of introducing extra covalent bonding of the rock-based nanocomposites. Point load and Slake-durability tests were carried out to illustrate the effects of silane-introduction to the strength and weathering resistance of the rock-based nanocomposite.In part II, the multi-functional methacrylates are prepared through polycondensation by isophorone diisocynante (IPDI), pentaerythritol triacrylate (PETA) reacting with epoxy acrylate, 2,2-bis[4-(20-hydroxy-30-methacryloyloxypropoxy)phenyl]propane (Bis-GMA), the series of urethane epoxy acrylate resins are successfully synthesized. The urethane epoxy acrylate oligomer’s structure is characterized by Fourier transform infrared spectroscopy (FT-IR). In order to enhance the hardness of the resins, the colloidal silica is successfully reacted with 3-(trimethoxy silyl)propyl methacrylate (MSMA). The characteristics of the colloidal silica/MSMA are measured by means of dynamic light scattering (DLS). The acrylate functional groups are chemically bonded to the surface of the silica spheres, enhancing the compatibility of the organic/inorganic interface; the highest hardness can reach 7H, and the adhesion of the PC & PET reaches 5B. The thermal properties of the cured coating are investigated by means of thermal gravimetric analysis (TGA), with the decomposition temperature (Td) reaching up to 440 ℃. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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