氟化石墨烯複合材料塗層於多功能披覆之研究;The study on the multifunctional coating of fluorinated graphene composite

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題名:	氟化石墨烯複合材料塗層於多功能披覆之研究;The study on the multifunctional coating of fluorinated graphene composite
作者:	蕭慎吾;Hsiao, Shen-Wu
貢獻者:	能源工程研究所
關鍵詞:	氟化石墨烯;複合材料;腐蝕;Fluorinated graphene;composite material;corrosion
日期:	2022-08-22
上傳時間:	2022-10-04 11:35:05 (UTC+8)
出版者:	國立中央大學
摘要:	石墨烯相關材料具備高度化學與熱的穩定性、高機械強度與抗水氧穿透能力，在防腐蝕塗層的研究中，成為一種極具潛力的添加材料，可是，石墨烯卻因自身優異的導電能力，反而在複合塗層中有著添加濃度上的極限，因此將石墨烯氟化改質就成為了最好的改良方式，但是傳統的改質方式又有著高毒性、高汙染與無法均質氟化的問題，所以無法達到目前工業化的需求，而且目前文獻所提及的複合塗層塗佈方式，大多無法符合高階電子元件所需要的均勻、厚度可控，以及複雜表面塗佈等精密的需求，同時，也無法達到最大化延長腐蝕介質擴散路徑，因此，大幅度限制了防腐塗層在工業上的可應用性。本研究將提出一種相較於過去更加環境友善，且可量產的低能量氟化製程，並且使用電泳沉積法製備具有順向排列性的防腐蝕保護塗層，並透過調整塗佈時間來控制其厚度。在防腐蝕研究成果上顯示，該塗層可以在浸泡於3.5 wt.%的NaCl水溶液 30天後，仍然保持著腐蝕速率只有2.0×10-3 m/year的優異表現，相較於原高分子塗層浸泡10天提升了兩個數量級；在保護塗層的散熱表現上，含有添加材料的高分子塗層的熱傳導係數也較原先提升了97 %；另外其具有高電性阻抗，該塗層在28 kV/cm的電場下之導通電流密度僅1.32×10-8 A/cm2，展現複合塗層具多功能性。本研究除了展現該塗層的防腐蝕能力與熱傳導能力外，創新的製備方式也符合大面積、均勻、厚度可控等工業應用的需求。憑藉著具備工業上量產與環境友善等製備條件，以及展現了多功能塗層性質的表現，本研究提供了一種在防腐蝕保護塗層上極具深入研發價值的改善方案。 ;Graphene-related materials have become potential additives in the research of anti-corrosion coatings due to their high chemical and thermal stability, high mechanical properties, and penetration resistance. However, graphene has a limited concentration added to the composite coating due to its high electrical conductivity that promotes galvanic corrosion, therefore the fluorination of graphene has become the best way to improve this issue. However, the traditional preparation method shows the problems such as the use of high toxic precursors, high pollution, and the inability to achieve homogeneous fluorination, so it cannot meet the requirement for current industrial apply applications addition, most of the composite coating methods mentioned in the literature cannot meet the requirements of uniformity, controllable thickness, and complex surface coating that are required by the high-end electronic components, and cannot maximize the extension of the diffusion path of the corrosive medium either. Therefore, the industrial application of anti-corrosion coatings is greatly limited. This study will propose a more environmentally friendly and mass-produced low-energy fluorination method than previous works. Also, the use of the electrophoretic deposition (EPD) method allows for the preparation of composite coating with adjustable thickness, from which the assembled FG flakes are highly aligned among the polymer matrix. In terms of anti-corrosion testing, the coating can still maintain an excellent corrosion rate of only 2.0×10-3 m/year after being immersed in 3.5 wt.% NaCl solution for 30 days. In terms of the heat dissipation performance of the protective coating, the thermal conductivity of the FG composite coating increased by 97% when compared with the pristine polymer. Also, the composite coating exhibit a high electrical resistance, from which the current density of the coating is only 1.32×10-8 A/cm2 when the applied electric field of 28 kV/cm. These results demonstrate the multifunctional properties of our proposed composite coating. In addition to the corrosion resistance and thermal conductivity of the coating, the preparation method also meets the requirements of large area, uniformity, and controllable thickness. With the preparation conditions of industrial mass production and environmental friendliness, as well as the performance of multifunctional coating properties, this study shows a promising way to improve anti-corrosion protective coatings.
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