石墨烯添加量對高分子塗層抗蝕及吸音能力之影響

Effect of graphene addition on corrosion resistance and sound absorption of polymer coatings

蔡佩穎(Pei-Ying Tsai)

指導教授 ： 李岳聯

國立臺灣大學/工學院/工程科學及海洋工程學研究所/碩士(2017年)

https://doi.org/10.6342/NTU201703664

摘要

研究中將不同比例之石墨烯(Graphene)添加至PU塗層中，再將此複合塗層塗佈於鋼底材上進行抗蝕能力與吸音能力分析。利用交流阻抗法以及鹽霧試驗量測不同石墨烯含量對抗蝕能力的影響，並搭配光學顯微鏡及掃瞄式電子顯微鏡觀察塗層微結構，最後再以落沙衝擊試驗、摩擦係數量測，以及拉拔測試、百格測試評估塗層的耐磨耗性與附著力。此外，為量測複合塗層吸音能力，以水下麥克風量測塗層在水下的吸音係數，測試頻率範圍為2K~6K Hz，此為一般潛艦常用的聲波頻段。實驗結果顯示在PU塗層中添加4 wt%及8 wt%石墨烯可以有效提升塗層抗蝕性，但隨著石墨烯含量添加，耐磨性質隨之降低，在吸音方面，添加4 wt%石墨烯有最高的吸音係數，比純PU提高約20%的吸音效果。

關鍵字

石墨烯 ； 聚氨酯 ； 吸音塗層 ； 抗蝕 ； 交流阻抗

並列摘要

In this research, different proportions of graphene were added to the PU coating, and the corrosion resistance and sound absorption ability coating were analyzed by the follow tests. The influence of the different contents of graphene coating was characterized by the Electrochemical Impedance Spectroscopy (EIS) and Salt Spray Tests (SST). The microstructure was examined by Optical Microscopy (OM) and Scanning Electron Microscopy (SEM). The falling sand abrasion test, coefficient of friction test, pull-off test and cross-cut tape test were used to evaluate the wear resistant and adhesion of the coatings. In order to characterize the sound absorption ability, we use the underwater impedance tube to measure the underwater sound absorption coefficient, and the frequency range is 2K~6K Hz. The results showed that the additions of 4wt% and 8wt% graphene in the PU coating can effectively improve the corrosion resistance. In the aspect of sound absorption, compared to the neat PU, the sound absorption coefficient increased about 20% when PU coatings combined with 4wt% graphene.

並列關鍵字

Graphene ； Polyurethane ； Sound absorption coating ； Anti-corrosion ； EIS

參考文獻

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[71] 邱大維, "水下阻抗管之設計與吸音材量測," 海洋科學, 臺灣大學, 2003.

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