以分子量为432的齐聚体甲氧基聚氧亚甲基蜜胺为原料,正丁醇为溶剂,经过溶胶凝胶、超临界干燥制得MF气凝胶。与制备三聚氰胺-甲醛(MF)气凝胶的单体法相比,齐聚体法具有制备周期短、操作简易等优点。采用SEM、BET、FT-IR、TGA对样品进行表征,结果表明:齐聚体法与单体法相比,化学结构与热稳定性保持一致,比表面积有所增大,形貌优良,粒径和孔径分布比单体法更加均匀。
Melamine-formaldehyde(MF) aerogels were prepared via poly (melamine-co-formaldehyde), methyla- ted by means of sol-gel and CO2 supercritical drying process. Compared with monomer way, the oligomer way prossesses the good point of shortage of preparation period and easy operation and so on. The samples were also characterized by SEM,BET,FT-IR and TGA. These characterizations showed that: the chemical structure and thermostability of MF aerogels prepared by oligomer and monomer stay the same,but MF aerogels prepared by oligomer is provided with the partical and pore size distribution uniformer than that prepared by monomer.
参考文献
[1] | Pekala R W .Low density resorcinol-formaldehyde aero-gels[P].US:4873218,1989-10-10. |
[2] | 李冀辉,胡劲松.有机气凝胶研究进展(I)--有机气凝胶发现、制备与分析[J].河北师范大学学报(自然科学版),2001(03):374-380,394. |
[3] | Hrubesh L W;Poco J F .Thin aerogel films for optical,thermal,acoustic and electronic applications[J].Journalof Non- Crystalline Solids,1995,188(1-2):46-53. |
[4] | Pajonk G M .Aerogel catalysts[J].Applied Catalysis,1991,72(02):217-266. |
[5] | 唐永建,张林,吴卫东,李波.ICF靶材料和靶制备技术研究进展[J].强激光与粒子束,2008(11):1773-1786. |
[6] | Pekala R W .Melamine-formaldehyde aerogels[P].US.5081163,1992-1-14. |
[7] | 张勇,任洪波,徐嘉靖,杜凯,张林,修鹏.MF气凝胶的制备和结构表征[J].强激光与粒子束,2006(11):1841-1844. |
[8] | 尚承伟,任洪波,张林,胡文成.酚改性MF气凝胶的制备及表征[J].强激光与粒子束,2009(12):1815-1818. |
[9] | 詹国武;王宏涛 .应用超临界流体干燥技术制备气凝胶的研究进展[J].干燥技术与设备,2008,24(04):171-175. |
[10] | Nguyen MH.;Dao LH. .Effects of processing variable on melamine-formaldehyde aerogel formation[J].Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites,1998(1):51-57. |
[11] | 邓芹英;刘岚;邓慧敏.波谱分析教程[M].北京:科学出版社,2007:30-88. |
[12] | Y.H.Lee;C.A.Kim;W.H.Jang;H.J.Choi;M.S.Jhon .Synthesis and electrorheological characteristics of microencapsulated polyaniline particles with melamine-formaldehyde resins[J].Polymer: The International Journal for the Science and Technology of Polymers,2001(19):8277-8283. |
- 下载量()
- 访问量()
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%