碳化溫度對木陶瓷之碳化物收率及部分物理性質之影響

Effect of Carbonization Temperature on the Carbide Yield and Physical Properties of Woodceramics

翁儷芯(Li-Hsin Weng) ； 李源弘(Yuan-Hong Li) ； 王松永(Song-Yung Wang)

《林產工業》 17卷1期 (1998/03) Pp. 155-170

摘要

木質材料（粒片板，硬化層積材（compreg）等），經高溫（500°C~900°C），在一定昇溫速度5°C/min，通入氮氣之條件下，經碳化處理所製得之碳化物稱為木陶瓷（woodceramics）。因這些碳化物具有多數微細孔隙，其內部表面積甚大，具有吸附、過濾、改良土壤等等功能，可有效的利用木材廢料以及回收再利用。本報告主要探討碳化溫度對其基本性質的影響，初步結果為碳化物之收碳率大致會依材料種類而異，並隨著碳化溫度之增加而減低，其收率大小依序為台灣杉硬化層積材＞黃柳桉硬化層積材＞杉木粒片板＞杉木實木，且碳化物之收碳率是以盼甲醇樹脂含浸率愈高者愈高。以Segal高度法計算不同碳化溫度所得木陶瓷碳化物之結晶度有隨碳化溫度之增加而增大趨勢。燒成後，所得陶瓷化碳化物之結晶度較木材結晶度高，2θ約22°之002繞射峰，有隨燒成溫度的提高而向高角度移動之趨勢，且相對d值變小。經由SEM觀測其碳化物粉末，發現隨著燒成溫度提高，木材纖維表面微小之碳結晶構造有些微增加現象。

關鍵字

木陶瓷 ； 碳化溫度 ； 碳化物收率 ； 碳化物結晶度 ； SEM觀察

並列摘要

Woodceramics is the carbide that woody material (particle board, resin-treated laminated compressed wood ＂compreg＂, etc) were carbonized in nitrogen to temperatures of 500 °C ~ 900 °C at a heating rate of 5 °C per minute. The carbide has many fine pores, big internal specific surfaces, and it can be used to absorb, leach and improve soil… etc. Wood wastes can be used and recycled in the process. This report explores the effects of carbonization temperature on basic properties of ceramics usually the carbide yield decreased when the carbonization temperature increase. The carbide yields were found in the order of Taiwania-fir compreg ＞ Yellow lauan compreg ＞ China-fir particle board ＞ China-fir solid wood. The higher the PF resin contain the higher carbide yield. The carbide crystallinity as calculated by Segal's Peak height method, it increased with the carbonization temperature. Woodceramics carbide crystallinity is higher than wood crystallinity, the (002) peak moves to higher angle with the higher carbonization temperature, and the d value decreases with the increases carbonization temperature, the micro carbon crystal on the surface of wood fiber increases.

並列關鍵字

Woodceramics ； carbonization temperature ； carbide yield ； carbide crystallinity ； SEM obseration