利用球磨技術將廢棄矽鋸粉轉化為微米片層材料及其添加在紫外光硬化聚苯乙烯塗料的防腐蝕應用

本碩士論文的研究動機，主要是希望對市售由太陽能板切割下來的廢棄矽鋸粉進行研磨加工，之後能當作無機填料添加劑，添加到許多不同的高分子塗料中(本論文所選用的高分子基材是光固化型聚苯乙烯)，以形成有機無機複合材料，來加強有機塗料的金屬防腐蝕性能。光固化型聚苯乙烯/矽鋸粉複合材料的製備程序是將含適量光起始劑的苯乙烯溶液，與不同百分比的經鋯珠球磨後的矽鋸粉複合後，再以UV光 (光波長= 365 nm，照光時間=4 hr，照光距離=10 cm) 照射苯乙烯單體使其進行光聚合反應，成功製備出聚苯乙烯/矽鋸粉微米複合薄膜，利用傅立葉轉換紅外線光譜儀進行樣品鑑定，且採用掃描式電子顯微鏡以及穿透式電子顯微鏡確定矽鋸粉的分散性，並且利用電化學量測裝置與交流阻抗模組進行防腐蝕性能的測試。從測試結果得知: 添加微米片層結構的矽鋸粉可以有效的提升聚苯乙烯的防腐蝕能力，添加矽鋸粉的聚苯乙烯從原本的防蝕效率58.81%提升至93.57%，證實了添加矽鋸粉可以延長腐蝕因子的擴散路徑達到防腐蝕的效果，為了進一步探討防腐蝕及阻氣的特性，利用氣體滲透分析儀來確定膜材阻氣的特性，當添加矽鋸粉之後聚苯乙烯對氧氣的穿透率由原本的23.64 g/m²-h 降至11.55 g/m²-h，證實矽鋸粉可以有效提升材料的阻氣特性。

關鍵字

防腐蝕；複合材料；光聚合；球磨；矽鋸粉；聚苯乙烯

並列摘要

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.