期刊：
Journal of Thermal Analysis and Calorimetry,2021年146(6):2353-2364 ISSN：1388-6150
通讯作者：
Liping Yuan<&wdkj&>Yunchu Hu
作者机构：
[Hu, Yunchu; Tang, Liandong; Yuan, Guangming; Yuan, Liping; Liu, Yuejiao] Cent South Univ Forestry & Technol, Sch Mat Sci & Engn, Changsha 410004, Peoples R China.;[Wu, Yuanbo] Cent South Univ Forestry & Technol, Sch Sci, Changsha 410004, Peoples R China.;[Fan, Youhua] Hunan Acad Forestry, Changsha 410004, Peoples R China.
通讯机构：
[Liping Yuan; Yunchu Hu] S;School of Material Science and Engineering, Central South University of Forestry and Technology, Changsha, China<&wdkj&>School of Material Science and Engineering, Central South University of Forestry and Technology, Changsha, China
关键词：
App;silicon gel;Metal salt of cu or mn;Catalytic char formation;Flame retardant;Smoke suppression;Green environment-friendly
摘要：
Wood is favored by furniture and decorative materials due to its beautiful color and texture, lightweight and high strength, but the thermal stability and flame retardants of wood have not been well solved. In this paper, metal salt-doped ammonium polyphosphate silicon gel (Cu, Mn/APP/Gel) was trapped in the wood cell wall and cell cavity by vacuum-pressure infusion method and vacuum drying method. Compared with unmodified wood, Cu, Mn/APP/Gel impregnated wood can rapidly enhance the flame retardant and smoke suppression capability of wood due to the catalysis of Cu2+ and Mn2+, and the total heat release rate, heat release rate peak value, mean heat release rate, smoke produce rate, total smoke release, CO and CO2 yield (YCO, YCO2) are obviously reduced. The electronic microscope picture of the burned carbon layer shows that the Cu, Mn/APP/Gel doped wood no longer has a clear and beautiful carbon layer formed by cell structure, but completely forms a whole. It is this dense and firm carbon layer structure that effectively inhibits the thermal decomposition of wood and has a role in flame retardant and smoke suppression. This study proposed an environment-friendly and green scheme for flame retardant modification of wood.
作者机构：
[汤连东; 袁利萍; 胡云楚; 刘月姣] College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha;410004, China;[吴袁泊] School of Science, Central South University of Forestry and Technology, Changsha;[范友华] Hunan Academy of Forestry, Changsha;[汤连东; 吴袁泊; 袁利萍; 胡云楚; 刘月姣; 范友华] 410004, China
通讯机构：
[Yuan, L.] C;College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, China
作者机构：
[胡云楚; 李慧; 黄自知; 吴袁泊] College of Science, Central South University of Forestry and Technology, Changsha, 410004, China;[袁利萍; 汤连东; 胡进波] College of Material Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China
通讯机构：
[Yuan, L.] C;College of Material Science and Engineering, Central South University of Forestry and Technology, Changsha, China
作者机构：
[胡云楚; 冯斯宇; 田梁才; 黄自知] College of Science, Central South University of Forestry and Technology, Changsha, 410004, China;[吴义强; 袁利萍] College of Material Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China
关键词：
Epoxy resin and polyamide composites;char sulfonic acid;ammonium polyphosphate;flame retardant
摘要：
Char sulfonic acid and ammonium polyphosphate were used to improve the flame retardancy of composites. A synergistic effect between char sulfonic acid and ammonium polyphosphate on the flame retardancy of epoxy resin and polyamide composites was proposed. The results showed that the optimal synergistic effects were achieved when the weight ratio of char sulfonic acid:ammonium polyphosphate was 1:3. Thermogravimetric analysis indicated that the flame retardants improved the amount of residue. The char sulfonic acid and ammonium polyphosphate additives greatly decreased the peak heat release rate and suppressed smoke according to cone calorimetry testing. Scanning electron microscope results showed that a compact and thick char layer was formed, which hindered the transfer of heat flow and combustible gases in the condensed phase. Thus, the combination of char sulfonic acid and ammonium polyphosphate had been proved to be a promising flame retardant system for epoxy resin and polyamide composites.
作者机构：
[夏燎原; 陈旬; 袁利萍] Material Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China;[田梁材; 王洁] College of Science, Central South University of Forestry and Technology, Changsha 410004, China;[胡云楚] Material Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China, College of Science, Central South University of Forestry and Technology, Changsha 410004, China
通讯机构：
[Hu, Y.-C.] M;Material Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
摘要：
The flammability and thermal stability of ammonium polyphosphate–treated flame-retarded sawdust boards were compared with those also containing 5A zeolite and 5A zeolite that had been impregnated with 4-picolinic acid. This comprehensive study was performed using cone calorimetry, thermogravimetric analysis and scanning electron microscopy. The results demonstrated that acid-treated 5A zeolite, which was incorporated into ammonium polyphosphate–based flame-retardant systems, showed superior performance to ammonium polyphosphate being used alone. This was determined by comparing the peak heat release rate, total heat release, fire growth index, smoke release rate, and total smoke emission. The thermogravimetric analysis results showed that 4-picolinic acid significantly altered the thermal stability of ammonium polyphosphate, which was catalytically decomposed in advance so as to retard combustion. Digital photography and scanning electron microscopy observations showed that 5A zeolite used with 4-picolinic acid efficiently promoted the formation of a continuous and consolidated charred layer.
作者机构：
[胡云楚; 陈旬; 夏燎原; 袁利萍] College of Material Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China;[王洁; 胡云楚; 田梁材] College of Science, Central South University of Forestry and Technology, Changsha 410004, China
通讯机构：
College of Material Science and Engineering, Central South University of Forestry and Technology, China
作者机构：
[胡云楚; 袁利萍] College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China;[伍国云] Hunan Food and Drug Vocational College, Changsha 410014, China
通讯机构：
College of Materials Science and Engineering, Central South University of Forestry and Technology, China
