添加柳杉及相思樹活性碳之塗料製備、性質及其於甲醛吸附之應用

Manufacture of Cryptomeria japonica and Acacia confusa Activated Carbon Contained Coatings and Their Applications on the Adsorption of Formaldehyde

方偉銘(Wei-Ming Fun) ； 張家偉(Chia-Wei Chang) ； 盧崑宗(Kun-Tsung Lu)

《林產工業》 36卷2期 (2017/06) Pp. 97-108

https://doi.org/10.6561/FPI.2017.36(2).4

摘要

本研究以國產柳杉（Cryptomeria japonica）與相思樹（Acacia confusa）為材料，製成400-500 mesh之微粉粒活性碳，再以二液型水性聚胺基甲酸酯（Polyurethane, PU）為展色劑，將活性碳粉依體積濃度1、5及10%分別與PU展色劑調配成6種活性碳塗料，除分析各種塗料與塗膜性質外，亦探討活性碳塗膜對游離甲醛之吸附效果。結果得知，兩種活性碳塗料之黏度均低於PU展色劑者，而塗料可使用時間與乾燥時間亦較短。所有活性碳塗膜之隱蔽率均較PU展色劑者高，當體積濃度5%時，柳杉與相思樹活性碳塗膜分別於膜厚300及200 μm即具遮蓋效果。柳杉活性碳體積濃度愈高者塗膜表面愈粗糙，但相思樹活性碳塗膜於不同體積濃度間無明顯差異，顯示相同條件下，相思樹活性碳塗料可得到較為平滑的塗膜。又所有活性碳塗膜之拉伸強度均較PU展色劑者差，其中以相思樹活性碳塗膜者較柳杉者有較佳之拉伸強度。所有塗膜附著性皆優良達10等級。經TGA分析顯示，活性碳塗膜耐熱性質優於PU展色劑者。此外，對游離甲醛之吸附，兩種活性碳塗膜均隨活性碳體積濃度增加而有更高的吸附量，又10%柳杉活性碳塗膜吸附效果隨塗膜面積增加而提高，但相思樹活性碳塗膜則無此趨勢。

關鍵字

柳杉 ； 相思樹 ； 活性碳 ； 塗料 ； 甲醛吸附

並列摘要

The activated carbon micro-powder (size of 400-500 mesh) were prepared from the domestic Cryptomeria japonica and Acacia confusa wood, and the six kinds of activated carbon coatings were obtained by blending the activated carbon micro-powder with two-pack waterborne polyurethane (PU) vehicle at various activated carbon volume concentrations of 1, 5 and 10%, respectively. Fundamental properties of coating and films with different activated carbon volume concentration as well as the adsorption efficiency of free formaldehyde were investigated. The experimental results indicated that the viscosity, shorter pot-life and curing time of the activated carbon coatings were lower than those of PU vehicle. All of the activated carbon films had higher hiding power than PU vehicle films. The effect of covering ratio of activated carbon films could be reached at the 5% volume concentration and the film thickness of 300 and 200 μm for C. japonica and A. confusa activated carbon coating, respectively. The roughness of C. japonica activated carbon films increased with increasing the volume concentration, but that of A. confusa were no significant difference among the coatings with different volume concentrations. The films of A. confusa activated carbon coatings were smoother than those of C. japonica ones. The tensile strength of both activated carbon films were lower than those of PU vehicle films, meanwhile, the A. confusa activated carbon coatings had higher tensile strength than that of C. japonica ones. All of the coatings had a superior adhesion of 10 grades. The activated carbon films had a better thermal stability than those of PU vehicle films by the TGA analysis. In addition, the adsorption efficiency of free formaldehyde of both activated carbon films increased with increasing the volume concentrations of activated carbon, and the adsorption efficiency of the C. japonica with 10% of volume concentration increased with increasing film area, while the A. confusa coatings with 10% volume concentration had no significant difference with various film areas.

並列關鍵字

Cryptomeria japonica ； Acacia confusa ； Activated carbon ； Coating ； Formaldehyde adsorption