Basic Study on the Manufacture of Carbonized Wood Shaving Mat and its Application to Insutation Materials

在200 ~ 300 kg/m^3的初始密度和400 ~ 500℃的炭化温度下，获得了良好的成形性能。测定碳化后的木材剃须垫的导热系数随初始密度和碳化温度的变化规律，发现其最小导热系数比碳化前的木材剃须垫小25%。为了研究这种更好的绝缘性背后的机制，使用导热混合定律计算了粗孔的表观导热系数，其中包括对流和辐射传热的影响。另一方面，考察了炭化温度与活性炭对甲醛和氨的吸附能力之间的关系，并从表面化学特征和孔径等方面探讨了炭化温度对甲醛和氨的吸附能力的机理。

Good formability was obtained at initial mat densities ranging 200-300 kg/m^3 and at carbonizing tenperatures ranging 400-500℃. Thermal conductivity of carbonized wood shaving mats was measured as a function of initial mat density and carbonizing temperature, and it was found that the minimun thermal conductivity was 25% less than that of wood shaving mats before carbonizing. To investigate the mechanisms behind this better insulation, apparent thermal connductivity of coarse pores which includs the effects of convective and radiative heat transfer was calculated by the use of a mix law of thermal conduction. On the other hand, relationships between carbonization temperature and adsorption ability to formaldehyde and ammonia were examined and then the mechanisms behind the adsorption ability were discussed from surface chemical characteristics and pore sizes.