Structure Characterization of Fluorosilicone Oils

Fluorosilicone oil is polysiloxane with alkyl side chains containing fluorine, and because of its excellent thermal oxidation stability, cold flow property and cryogenic property, it can be widely used as a high temperature lubricant in the field of military aerospace industry. Two kinds of fluorosilicone oils, FSiO-a and FSiO-b, were synthesized by different pro- cessing means. FTICR MS was used to collect the information on composition and structure of the two polymers, respec- tively. The test results show that the two fluorosilicone oils have different contents of fluorine-containing chain segments (m/ n value), the maximum distribution of m/n value of FSiO-a oil ranges from 0.22 to 0.25, and that of FSiO-b oil ranges from 0.4 to 0.67. Difference in synthesis techniques makes this discrepancy and affects the quality and thermal stability of the fluoro- silicone oils.

三聚氰胺改性酚醛基多孔碳材料的制备及其二氧化碳吸附性能

采用浓乳液模板法制备三聚氰胺-间苯二酚-甲醛多孔树脂,将其热解后得到了可用于二氧化碳吸附的氮掺杂多孔碳材料。研究了浓乳液模板的分散相体积分数和三聚氰胺含量对多孔碳材料微观形貌的影响,结果表明,在浓乳液模板分散相体积分数为90%的条件下制备的多孔聚合物具有丰富的通孔结构。经过热解后,得到了兼具无机碳骨架和有机氮活性位点的氮掺杂多孔碳材料。进一步研究了不同热解温度和三聚氰胺含量对多孔碳材料二氧化碳吸附性能的影响,二氧化碳的吸附容量最高可达到3.32 mmol/g,同时表现出良好的选择吸附性和再生性。