催化剂对三聚氰胺-甲醛有机气凝胶的影响

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Effect of catalyst on melamine-formaldehyde organic aerogel

1.
Research Center of Laser Fusion,CAEP,P.O.Box 919-989,Mianyang 621900,China;
2.
Institute of Atomic and Molecular Physics,Sichuan University,Chengdu 610065,China;
3.
School of Material Science and Engineering,Shouthwest University of Science and Technology,Mianyang 621010,China

摘要: 采用溶胶-凝胶法制备出一系列不同催化剂种类和浓度的三聚氰胺-甲醛(MF)有机气凝胶模板，通过傅里叶变换红外光谱仪、热分析仪、N2吸附等测试手段对其分子结构、热稳定性、孔结构进行了表征。测试结果表明：催化剂种类和浓度变化不影响模板的分子结构和热性能；各模板热解程度均达97%；相比NaOH和NaHCO3为催化剂制备的模板，Na2CO3为催化剂时，制备的模板更优，比表面积和孔容较大，孔分布范围较宽; 当三聚氰胺与催化剂的浓度比为500时，比表面积达到最大。
- 催化剂 /
- 溶胶-凝胶 /
- 模板 /
- 热稳定性
Abstract: A series of melamine-formaldehyde(MF) organic aerogel templates were prepared with different categories and concentration of catalyst. Their molecular structure, thermal stability and pore structure were tested by Fourier transform infrared spectroscopy, thermogravimetric analysis and nitrogen adsorption. It is indicated that the type and concentration of catalyst do not affect molecular structure and thermal stability of the MF organic aerogel template. The specific surface area and pore volume of the MF organic aerogel template using Na2CO3 as catalyst are higher than those using NaOH, NaHCO3 as catalyst. When the ratio of the concentration of melamine to that of catalyst is 500, the specific surface area is maximized.
- catalyst /
- sol-gel /
- template /
- thermal stability