催化剂对乳液模板法制备碳材料形貌的影响

doi:10.3866/PKU.WHXB20100933

Acta Phys. -Chim. Sin. ›› 2010, Vol. 26 ›› Issue (10): 2666-2671.doi: 10.3866/PKU.WHXB20100933

• COLLOID AND INTERFACE CHEMISTRY • Previous Articles Next Articles

Effect of Catalysts on the Morphologies of Carbon Materials Synthesized by an Emulsion Templating Method

GAN Li-Hua¹, LIU Ming-Xian^1,2, CHEN Long-Wu¹, HU Jun², LIU Hong-Lai²

1. Department of Chemistry, Tongji University, Shanghai 200092, P. R. China;
2. Key Laboratory for Advanced Materials, Department of Chemistry, East China University of Science and Technology, Shanghai 200237, P. R. China

Received:2010-04-28 Revised:2010-06-04 Published:2010-09-27
Contact: GAN Li-Hua,LIU HONG-Lai E-mail:ganlh@tongji.edu.cn, hlliu@ecust.edu.cn;
Supported by:
The project was supported by the National Natural Science Foundation of China (20973127, 20776045, 20736002), Shanghai Nanotechnology Promotion Center, China (0952nm00800), National High Technology Research and Development Programof China (2008AA062302), China Postdoctoral Science Foundation (20090460647) and Shanghai Postdoctoral Scientific Program, China (10R21412100).

Abstract

Abstract:

An oil in water (O/W) emulsion with a resorcinol and formaldehyde (R+F) water solution as the external phase and liquid paraffin as the internal phase together with Span 80/Tween 80 as emulsifiers was obtained. Carbon materials were prepared by polymerization of the emulsion, followed by carbonization for template removal. The effect of catalysts on the morphologies of the carbon materials was investigated. The results indicate that the resultant representative carbons area type of porous carbon foam and possess pore walls and pores of 1-2 μm in size when NaOH is used as a catalyst. However, monolithic carbon materials consisting of microspheres or intertwinded wormlike particles were prepared using ammonia as an alternative catalyst. The diameters of these microspheres or particles were mainly around 1-2 μm and these dimensions are similar to the pore sizes of the carbon foams. We find that ammonia causes the initial O/W emulsion system to experience a phase inversion towarda W/O high internal phase emulsion.A mechanism involving intermolecular H-bond interactions and cohesive energy theory is proposed to explain the catalyst-induced phase inversion phenomenon as well as the formation of carbon materials with different morphologies.

Key words: Emulsion, Catalyst, Carbon material, Morphology, Phase inversion, H-bond

MSC2000:

O648

GAN Li-Hua, LIU Ming-Xian, CHEN Long-Wu, HU Jun, LIU Hong-Lai. Effect of Catalysts on the Morphologies of Carbon Materials Synthesized by an Emulsion Templating Method[J].Acta Phys. -Chim. Sin., 2010, 26(10): 2666-2671.

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Effect of Catalysts on the Morphologies of Carbon Materials Synthesized by an Emulsion Templating Method

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