Formation of Stable Charcoal Layer Coating the Wooden Material Surface by the Application of Tannin-Charcoal Suspensions
Formation of Stable Charcoal Layer Coating the Wooden Material Surface by the Application of Tannin-Charcoal Suspensions
复制标题
应用单宁木炭悬浮液在木质材料表面形成稳定的木炭层
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
Akitsuki Katsufumi
中科院分区：
文献类型：
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作者：
Ohara Seiji;Fujii Tomoyuki;Akitsuki Katsufumi
原稿受付:平成 15 年 7 月 30 日 Received July 30, 2003 原稿受理:平成 15 年 11 月 26 日 Accepted Nov. 26, 2003 * Department of Forest Chemistry, Forestry and Forest Products Research Institute (FFPRI),1 Matsunosato, Tsukuba, Ibaraki 305-8687, Japan; e-mail: oharas@ffpri.affrc.go.jp 1) Department of Forest Chemistry, Forestry and Forest Products Research Institute (FFPRI) 2) Research Planning and Coordination Division, Forestry and Forest Products Research Institute (FFPRI) 3) Biocarbon Research Institute Inc. Introduction Wood charcoal has a long history as a material for fuels. Recently, it has been utilized also for materials for filtration and adsorption in the chemical industry (Ishihara, 1996). Sugi (Cryptomeria japonica D. Don, Taxodiaceae) wood carbonized at 1000°C can effectively remove mercury from aqueous solutions (Pulido et al., 2001). A charcoal that was produced by carbonizing sugi sapwood at 600°C and following steam-activating at 850 °C for 50 min can also remove chloroform from drinking water (Abe et al., 2001). Recently, there have been many useful functions of wood charcoals demonstrated, some of which are the abilities to regulate the humidity of a room, to adsorb formaldehyde, to deodorize ammonia, and to shield electromagnetic waves (Abe et al., 1998, Saito et al., 2000, Honma et al., 2000, Ide et al., 1992). Therefore, the utilization of wood charcoals as materials for the improvement in housing environment will be considerably extended if they are easily fixed on various wooden materials. However, the utilization of them for this purpose is actually restricted because it is difficult to form a charcoal layer on the surface of wooden materials. In this study, tannin-charcoal suspensions were prepared by mixing wood charcoals with several kinds of tannin aqueous solutions and applied to coating with a brush on the surface of sugi plywood. After air-drying, the fixation of wood charcoals on the plywood was examined. As wood charcoal has a black color, a plywood will be occasionally needed to be overlaid when it is applied for interior wooden materials. On such occasions, certain water-soluble adhesives are used conveniently. Therefore, it is also an important factor that the charcoal powders are not eliminated on dropping of water. Thus, it was also examined whether wood charcoal layers formed were eliminated or not on dropping of water to the plywood. Furthermore, microscopic study was done in order to investigate the morphology of wood charcoals fixed in the tannin-charcoal layer.