摘要
A comparative study was conducted on liquid penetration of the freeze-drying and air-drying sapwood and heartwood lumber of plantation Chinese fir （Cunninghamia lanceolata）. The maximum amount of dyeing solution uptake by the capillary rise method was used to evaluate the liquid penetration properties of the treated wood. The pit aspiration ratio was determined by semithin section method. Changes in wood microstructure were investigated using scanning electron microscopy. The results showed that compared with air drying, the freeze drying had a significant effect on liquid penetration of sapwood and heartwood of Chinese fir. The liquid penetration of sapwood is significantly higher than that of the heartwood for both drying treatments. Low pit aspiration ratio and cracks of pits membrane of some bordered pits are the main reasons for increasing liquid penetration after freeze drying treatment.
比较研究在 freeze-dryingand air-drying 边材和赤木质的液体穿入上被进行种植园汉语冷杉木(Cunninghamia lanceolata ) 伐木。由毛状的上升方法染答案举起的 Themaximum 数量被用来评估对待的木头的液体穿入性质。坑渴望比率是坚定的 bysemithin 切片法。在木头微观结构的变化用扫描电子显微镜学被调查。结果证明与弄干的空气相比，弄干的 freeze 在边材的液体穿入和中国冷杉木的赤木质上有重要效果。边材的液体穿入比为两个都弄干处理的赤木质的显著地高。某具缘纹孔的坑膜的低坑渴望比率和裂缝是为增加液体穿入在以后的主要原因结冰弄干处理。
基金
This paper was supported by the National Natural Science Foundation of China （No. 30271053）
