2 supercritical drying technique using resorcinol (C6H4(OH)2) and formaldehyde (HCHO) as the precursors andSsodium carbonate as catalyzer respectively, enhanced frame support by PAN pre-oxidized fibers in the solvent. The sample composition is characterized by using Fourier transform infrared spectrometer. Field emission scanning electron microscopy (FESEM), surface area and pore size analyzer were used to investigate the microtopography and the microstructure of the RF aerogels composited PAN pre-oxidized fibers with the nanoporous structure. Compared with the pure RF aerogel, the excellent thermal conductivity of the RF aerogels composited PAN pre-oxidized fibers is 0.032W/mK at 25°C and Youngs modulus of 1.499MPa has increased 0.6 time."/>

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Performance of the RF aerogels composited PAN pre-oxidized fibers
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Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology,School of Physics Science and Engineering,Tongji University,Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology,School of Physics Science and Engineering,Tongji University,Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology,School of Physics Science and Engineering,Tongji University,Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology,School of Physics Science and Engineering,Tongji University

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National Key Research and Development Program of China (2017YFA0204600), Science and Technology Innovation Fund of Shanghai Aerospace (SAST201469, SAST201321).

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    Abstract:

    The resorcinol–formaldehyde (RF) aerogels composited polyacrylonitrile (PAN) pre-oxidized fibers were prepared by a sol-gel method combined with the CO2 supercritical drying technique using resorcinol (C6H4(OH)2) and formaldehyde (HCHO) as the precursors andSsodium carbonate as catalyzer respectively, enhanced frame support by PAN pre-oxidized fibers in the solvent. The sample composition is characterized by using Fourier transform infrared spectrometer. Field emission scanning electron microscopy (FESEM), surface area and pore size analyzer were used to investigate the microtopography and the microstructure of the RF aerogels composited PAN pre-oxidized fibers with the nanoporous structure. Compared with the pure RF aerogel, the excellent thermal conductivity of the RF aerogels composited PAN pre-oxidized fibers is 0.032W/mK at 25°C and Young"s modulus of 1.499MPa has increased 0.6 time.

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[Wu Xueling, Zhang Zhihua?,Shen Jun?,Xu Qinghua. Performance of the RF aerogels composited PAN pre-oxidized fibers[J]. Rare Metal Materials and Engineering,2018,47(S2):104~107.]
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History
  • Received:December 04,2017
  • Revised:December 08,2017
  • Adopted:February 02,2018
  • Online: November 01,2018
  • Published: