<Preliminary>Mechanism and Clarification of Electrical Conduction through Wood Charcoal

この論文は国立情報学研究所の学術雑誌公開支援事業により電子化されました

Fire Proofing Properties of Wood and Filter Paper treated with Cationic Melamine-Formaldehyde Condensation Products : Effect of Inorganic Acids on the Fire Proofing Efficiencies

この論文は国立情報学研究所の学術雑誌公開支援事業により電子化されました。The durable fire-retardants based on the colloidal solution of cationic aminotriazinealdehyde resin have been applied to HINOKI sliced veneer and filter paper. The treatment is accomplished by soaking samples through an aqueous solution of these resins, drying and curing at room temperatures. The effect of kind of acids and of varying ratio of fire retardant components in treating solution on the fire proofing efficiencies of HlNOKl sliced veneer and filter paper are discussed. Results are compared with those reported in previous paper and ammonium salts as fire retardant agents for wood, paper, fabrics and other combustible materials. Aminotriazine-aldehyde condensation products combined with strong acids such as phosphoric acid, hydrobromic acid, sulfuric acid and sulfamic acid imparted excellent fire resistance to wood and filter paper. Satisfactory fire proofing properties can be obtained in both HlNOKl sliced veneer and filter paper at resin add-on as low as about 10～15% with a few exceptions. Total amount of resin required becomes lower as the melamine/acid ratio is decreased

<Original>Fire Endurance of Surface Densified Wood of Albizzia falcata Treated with Fire Retardant

この論文は国立情報学研究所の学術雑誌公開支援事業により電子化されました。Bending strength and creep behavior under fire of solid wood, laminated veneer lumber (LVL) and glued-laminated timber of albizzia (Albizzia falcata Backer) coated with fire retardant and hot pressed (surface densified) at several temperatures were evaluated. Chemical used was trimethylolmelamine mixed with phosphoric acid coated at the amount of 100g/m^2. Results showed that the fire endurance (time to creep rupture) of surface densified albizzia treated with the chemicals was improved, compared to that of untreated ones. Temperature of hot pressing of 160℃ resulted in the longest time to creep rupture. Bending strength of woods was not affected when pressed at the temperature below 200℃

<Note>Combustibility of China Fir Wood Treated with Standard Fire Retardants

この論文は国立情報学研究所の学術雑誌公開支援事業により電子化されました。Test specimens were prepared from China fir (Cunninghamia lanceolata Hook), and impregnated with five fire retardant chemicals listed in Chinese National Standards (CNS). The treated specimens were tested for their combustibility according to CNS 6532 to measure the time required for the temperature of the exhausting air to exceed the standard referential curve, heat generation, factor of smoke, time of after-flame, and occurrence of cracks of the test. Comparison of the results demonstrated that three chemicals could meet requirements in the standard

<Preliminary>NO_X Purification by Wood Charcoals and Their Composites with Metal Oxides

この論文は国立情報学研究所の学術雑誌公開支援事業により電子化されました

Research and Development of Carbon Composites from Wood Charcoal for Environmental Clean-up and their Applications

この論文は国立情報学研究所の学術雑誌公開支援事業により電子化されました

<Original>Removal of Mercury from Aqueous Solutions of Mercuric Chloride Using Wood Powder Carbonized at High Temperature

この論文は国立情報学研究所の学術雑誌公開支援事業により電子化されました。Japanese cedar (Cryptomeria japonica D. Don) wood powder was carbonized at varying temperatures from 400° to 2,400℃ and used to remove mercury from 5 ppm mercuric chloride solutions. The removal efficiency of the carbonized wood materials changed depending on the carbonization temperature. The carbonization temperatures that provided wood powder with high removal capacity ranged from 600° to 1,400℃. Low removal of mercury from the aqueous solutions was observed for carbonization temperatures below 400° and above 1,600℃. The specific surface area of the carbonized wood materials was highly correlated with the capacity to remove mercury