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首页> 外文期刊>Journal of Applied Polymer Science >Graphite Carbon Foam Films Prepared from Porous Polyimide with In Situ Formed Catalytic Nickel Particles
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Graphite Carbon Foam Films Prepared from Porous Polyimide with In Situ Formed Catalytic Nickel Particles

机译：由多孔聚酰亚胺与原位形成催化镍颗粒制备的石墨碳泡沫薄膜

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摘要

This article describes the preparation of porous polymide composites and carbon foam films with uniform and controllable porous Structures, using nickel oleate as a pore-forming agent and as a precursor for catalyst formation for the carbonization process. Pore formation occurs by a phase separation initially producing a dispersion of nickel oleate liquid in the polyamide acid film. Subsequent heat treatment induces decomposition of the nickel oleate accompanied by the evolution of foam forming gas. Small nickel particles, formed by the decomposition of nickel oleate, melt as the process temperature rises above 1200 degrees C and these molten nickel particles then play an important catalytic role in promoting the graphitization of the polyimide composites as part of a dynamic process forming pores proceeding through the thickness of the film. These porous structures are maintained after the removal of the nickel by pyrolysis. The thermal behavior and structure of the porous polyimide films were examined and the porosity and stacking structures of the carbon foam films formed by polyimide pyrolysis were investigated. The results indicate that the pore size of the carbon foams could be controlled over a broad range by varying the nickel oleate content participating in the polymerization reaction.
机译：本文介绍了使用油酸镍作为成孔剂和作为碳化过程中催化剂形成的前体，制备具有均匀且可控的多孔结构的多孔聚酰胺复合材料和碳泡沫膜的方法。通过相分离发生孔形成，该相分离最初在聚酰胺酸膜中产生油酸镍液体的分散体。随后的热处理引起油酸镍的分解，并伴随着泡沫形成气体的释放。当过程温度升高到1200摄氏度以上时，由油酸镍的分解形成的小镍颗粒熔化，然后这些熔融的镍颗粒在促进聚酰亚胺复合材料的石墨化中起重要的催化作用，这是形成孔的动态过程的一部分穿过薄膜的厚度。通过热解除去镍后，这些多孔结构得以保持。检查了多孔聚酰亚胺膜的热行为和结构，并研究了由聚酰亚胺热解形成的碳泡沫膜的孔隙率和堆叠结构。结果表明，通过改变参与聚合反应的油酸镍的含量，可以在宽范围内控制碳泡沫的孔径。

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