Beads-Milling of Waste Si Sawdust into Microflakes and Applied for UV-curable Polystyrene Anticorrosion Composite Coatings
| Autor: | Hsin-Kai Yu, 俞欣愷 |
|---|---|
| Rok vydání: | 2018 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 106 This dissertation is mainly focused on the study of polymer composites containing beads milled waste sawdust and applied in anticorrosion application. First of all, the sawdust obtained from cutting of commercially available solar panels was processed by beads-milled procedure by Zr beads of ~ 5 mm in diameter. Subsequently, the photo-polymerization of styrene monomer in the presence of suitable amount of beads-milled sawdust was performed under UV radiation of exposed wavelength of 365 nm, exposed time of 4 hours, exposed distance of 10 cm. The as-prepared polystyrene (PS)/Si sawdust composites were characterized by Fourier transformation infrared (FTIR) spectroscopy. Morphological dispersion of sawdust in PS was studied by scanning electron microscopy (SEM) and EDX. It should be noted that the PS/Si sawdust composites were found to exhibit better anticorrosion performance as compared to that of neat PS based on a series of electrochemical corrosion measurements in saline conditions. According to the test results, the addition of the micro-slice structure of the Si sawdust can effectively improve the corrosion resistance of polystyrene. The polystyrene added with the Si sawdust has increased from the original corrosion protection efficiency from 58.81% to 93.57%, confirming the addition. Si sawdust can prolong the diffusion path of corrosion factor to achieve anti-corrosion effect. The O2 gas permeability of composite membranes was found to lower than that of neat PS membrane, after adding Si sawdust the penetration rate of polystyrene to oxygen decreased from the original 23.64 g/m2-h to 11.55 g/m2-h, which supports the corresponding data of anticorrosion performance of coatings. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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