The carbonization of polyimides

Грибанов, А. В.; Shirokov, N. A.; Kolpikova, Ye.F.; Fedorova, G. N.; Borisova, T.I.; Kol'tsov, A. I.; Михайлова, Н.В.; Gladkova, L. G.; Sekei, T.; Sazanov, Yu. N.

doi:10.1016/0032-3950(85)90461-7

Cited by 4 publications

(3 citation statements)

References 8 publications

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“…53,54 In particular, the very basic question of why some organic materials produce graphitizing carbons and others yield non-graphitizing carbons has not been satisfactorily answered. It is known, however, that both the chemistry and physical properties of the precursors are important in determining the class of carbon formed.…”

Section: Carbonization and The Structural Evolution Of Microporous Camentioning

confidence: 99%

New Perspectives on the Structure of Graphitic Carbons

Harris

2005

Critical Reviews in Solid State and Materials Sciences

361

251

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Graphitic forms of carbon are important in a wide variety of applications, ranging from pollution control to composite materials, yet the structure of these carbons at the molecular level is poorly understood. The discovery of fullerenes and fullerene-related structures such as carbon nanotubes has given a new perspective on the structure of solid carbon. This review aims to show how the new knowledge gained as a result of research on fullerene-related carbons can be applied to well-known forms of carbon such as microporous carbon, glassy carbon, carbon fibers, and carbon black.

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Section: Carbonization and The Structural Evolution Of Microporous Camentioning

confidence: 99%

New Perspectives on the Structure of Graphitic Carbons

Harris

2005

Critical Reviews in Solid State and Materials Sciences

361

251

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“…The microstructured PI film was annealed under 100, 200, and 300 °C for 1 h at each temperature in the vacuum furnace to remove residual molecules from the solvent. [ 60–62 ]…”

Section: Methodsmentioning

confidence: 99%

“…The microstructured PI film was annealed under 100, 200, and 300 °C for 1 h at each temperature in the vacuum furnace to remove residual molecules from the solvent. [60][61][62] The microstructured PI film was sandwiched between carbonization molds and placed into a tube furnace under argon gas flow for precarbonization using a temperature profile from 200 to 1000 °C as shown in Figure S3 (Supporting Information). Further, the microstructured carbonized PI films were sandwiched between supporting graphite plates and using the vacuum tube furnace (GLS-1800X) hightemperature graphitization was carried out by gradually increasing temperature to 1000, 1200, and 1400 °C with a heating rate of 10 °C min -1 and stabilized at 1600 °C with a heating rate of 5 °C min -1 for 1 h, under an argon flow rate of 10 L min -1 .…”

Section: Methodsmentioning

confidence: 99%

3D Microstructured Frequency Selective Surface Based on Carbonized Polyimide Films for Terahertz Applications

Hlaing

Karthikeyan

et al. 2022

Advanced Optical Materials

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In recent years, frequency selective surface (FSS)‐based two‐dimensional (2D) and three‐dimensional (3D) carbon materials such as carbon nanofibers, carbon nanotubes, and carbon‐filled filaments are essential tools to design millimeter‐wave radomes, absorbers, electromagnetic interference (EMI) shielding, and antenna reflectors in gigahertz (GHz) regimes. Terahertz (THz) technologies are gaining attentions from medical imaging to security surveillance. In this work, a 3D microstructured FSS using carbon‐based polyimide as a precursor to enhance the resonant frequency at the THz range. Furthermore, gold nanoparticles (AuNPs) are embedded on 3D microsturctured carbonized polyimide (3D‐CPI) film to improve their FSS property through plasmonic effects. From the time domain spectroscopy measurements, 3D‐CPI FSS film shows band‐stop filter properties in the frequency range of 0.5–1.5 THz and with a maximum return loss (RL) of 40.5 dB (at the resonant frequency of 1 THz). The 3D‐CPI/AuNPs film demonstrates the highest RL of 43.7 dB at the higher excitation resonance frequency ≈1.06 THz due to the interaction of plasmonic electrons with scattered delocalized electrons in carbon, which induces the mechanisms for EMI shielding. The results will open insight into 3D plasmonic carbon microstructures as an EMI shielding material at THz frequency.

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