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題名 | 柳杉與相思樹活性碳塗料之性質及其遮蔽電磁波之應用=The Properties of Activated Carbon Coatings and Their Application on Electromagnetic Wave Shielding from Cryptomeria japonica and Acacia confusa |
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作者姓名(中文) | 方偉銘; 張家偉; 盧崑宗; | 書刊名 | 林產工業 |
卷期 | 36:3 2017.09[民106.09] |
頁次 | 頁149-158 |
分類號 | 474.33 |
關鍵詞 | 柳杉; 相思樹; 活性碳塗料; 體積濃度; 電磁波遮蔽; Cryptomeria japonica; Acacia confusa; Activated carbon coating; Volume concentration; Electromagnetic wave shielding; |
語文 | 中文(Chinese) |
中文摘要 | 利用柳杉(Cryptomeria japonica)與相思樹(Acacia confusa)以二階段物理活化法製成400~500 mesh之活性碳,於二液型水性聚胺基甲酸酯(Polyurethane, PU)展色劑中,分別添加體積濃度為1、5、10%之活性碳粉,得到活性碳塗料,但發現活性碳體積濃度低於10%者,塗膜均不具電磁遮蔽效果,因此將活性碳體積濃度增加為20、30、40及50%,並探討不同膜厚對於活性碳塗膜之電磁遮蔽效果及其塗料與塗膜基本性質之變化。結果發現,即使當塗膜中柳杉活性碳體積濃度增加至20-50%,且膜厚200-400 μm下,活性碳塗膜對電磁波遮蔽效果仍有限。但添加相思樹活性碳者中,當塗膜中活性碳體積濃度達40%且膜厚為400 μm時,可具有遮蔽電磁波之效能。活性碳塗料性質中,塗料黏度會隨活性碳體積濃度增加而升高,而可使用時間及乾燥時間均縮短。塗膜性質方面,硬度隨活性碳體積濃度及膜厚增加而降低,所有活性碳塗膜附著性皆為10等級。添加活性碳之塗膜耐衝擊性、拉伸強度及破壞伸長率均降低。 |
英文摘要 | The activated carbon powder (size of 400 ~ 500 mesh) were prepared from Cryptomeria japonica and Acacia confusa wood by two step physical activation. The coatings contained activated carbon were obtained by mixing the two-pack waterborne polyurethane (PU) vehicle and activated carbon powder at various activated carbon volume concentrations of 1, 5 and 10%, respectively. However, the experimental results showed that the coating films of activated carbon concentrations lower than 10% had poor ability for shielding the electromagnetic wave. Therefore, the activated carbon volume concentrations of coatings were raised to 20, 30, 40 and 50% in the following experiment, and the fundamental coatings, films properties as well as the ability for shielding the electromagnetic wave were examined. The experimented results indicated that the films contained 20-50% activated carbon from C. japonica wood could not shield the electromagnetic wave even with a high film thickness of 400 μm. While the film reached 40% activated carbon from A. confusa wood with a film thickness of 400 μm could be with the ability to reflect the electromagnetic wave. The experimented results of coating properties with different activated carbon volume concentrations and film thickness indicated that the coating viscosity increased with increasing the activated carbon volume concentration. The pot-life and curing time of coatings were shortened with increasing the activated carbon concentration. Film properties including impact resistance, tensile strength and elongation at break were decreased with increasing the activated carbon concentration. The film hardness decreased with increasing of activated carbon concentration and film thickness and all films in this study had an excellent film adhesion. |
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