Applications of SEM-servo tesing machine to wood-based materials science and technology.

1.木材的静态和疲劳断裂：用扫描电镜实时观察了几种木材和木质材料在拉伸、压缩、剪切和疲劳过程中的断裂过程。2.树木细胞硬度和生长应力的发展过程：阐明了生长应力与胶质层（木质素含量和微丝角）之间的关系。本文还测量了外力对树枝生长应力的影响，并与有限元计算结果进行了比较。3.速生材的结构与利用：对绿色原木进行蒸煮预处理，可有效地减少热带地区桉树的萎蔫和干燥时间。4.利用SELI观测技术研究了圆锯片锯切过程中切削因素与木材表面的相互作用：Af、锯齿角度、磨损、每齿进给量、顺纹切削方向等因素对木材锯切表面的影响。5.静态和疲劳试验中木基材料粘接面的断裂：根据SEM观察和断裂力学的结果，预测了指接层片在弯曲时的承载力。6.功能化合物聚合物的聚集形态：寡糖取代的苯乙烯单体经辐射聚合，在溶液中发现直径为0.6 - 1.3 μ m的微球。7.成品木材的吸湿性能：吸湿（商品：Ketsuronain），聚氨酯和氨基醇酸树脂涂料暴露于加速风化程序长达100小时。吸湿涂层表现出类似的行为，没有涂层或聚氨酯涂层。

1. Fracture of wood under static and fatigue tests : Fracture processes of several woods and wood-based materials in tension, compression, shear, and fatigue were catched with SEM observation in realistic time. 2. Developing processes of cell stiffness and growth stresses in trees : Relationships between growth stresses and gelatinous layers (liginin contents, and microfiril angles) were clarified. Effects of external forces on growth stresses in branches were also measured and compared with FEM results. 3. Structure and utilization of rapid growth trees : Steaming as a pretreatment of green loggs were proved to be effective to decreasing of collapses and drying times of gum-trees for tropical regions. 4. Interactions of cutting factors and wood surfaces in circular saw cutting : Af, fects of angles and wearing of tooth, feed per tooth, cutting direction to the grain, and others to sawed surfaces of wood were investigated with SELI observation. 5. Fracture of bonding surfaces in wood-based materials in both static and fatigue-tests : Bearing forces of finger-jointed laminae in bending were predicted from the results of SEM observations and fracture mechanics. 6. Aggregated morphology of functional compoundpolymers : Oligosaccharide-substituted styrene monomers were plymerized by radiation, and microspheres with diameters 0.6 to 1.3 mu m were found in solution. 7. Hygroscopic behaviours of finished wood : Hygroscopic (commercial products : Ketsuronain), urethane, and amino-alkyd resin coatings were exposed to accelerated weathering procedures up to 100 hours. Hygroscopic coating showed similar behaviours to those of no coating or urethane coating.