Study on peculiar carbon pattern formation from polymer blend thin films under electric fields

Joo, Seokwon; Park, Jeong Yong; Seo, Soonmin; Moon, Seoksu; Lee, Kyung Jin; An, Jaieun; Lee, Chang‐Soo; Bae, Joonwon

doi:10.1016/j.tsf.2018.03.007

Cited by 3 publications

(5 citation statements)

References 24 publications

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“…The studies of heat treatment on PAN can be divided into two major categories, i.e., low temperature oxidation and/or stabilization [21][22][23][24][25] and high temperature carbonization [26][27][28][29]. The low temperature oxidation of PAN can be realized in the temperature range from room temperature up to 300 • C [21,22].…”

Section: Polyacrylonitrile (Pan) Derived Composite Carbon Nanofiber A...mentioning

confidence: 99%

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Advances in Manufacturing Composite Carbon Nanofiber-Based Aerogels

Gan

2020

J. Compos. Sci.

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This article provides an overview on manufacturing composite carbon nanofiber-based aerogels through freeze casting technology. As known, freeze casting is a relatively new manufacturing technique for generating highly porous structures. During the process, deep cooling is used first to rapidly solidify a well-dispersed slurry. Then, vacuum drying is conducted to sublimate the solvent. This allows the creation of highly porous materials. Although the freeze casting technique was initially developed for porous ceramics processing, it has found various applications, especially for making aerogels. Aerogels are highly porous materials with extremely high volume of free spaces, which contributes to the characteristics of high porosity, ultralight, large specific surface area, huge interface area, and in addition, super low thermal conductivity. Recently, carbon nanofiber aerogels have been studied to achieve exceptional properties of high stiffness, flame-retardant and thermal-insulating. The freeze casting technology has been reported for preparing carbon nanofiber composite aerogels for energy storage, energy conversion, water purification, catalysis, fire prevention etc. This review deals with freeze casting carbon nanofiber composite materials consisting of functional nanoparticles with exceptional properties. The content of this review article is organized as follows. The first part will introduce the general freeze casting manufacturing technology of aerogels with the emphasis on how to use the technology to make nanoparticle-containing composite carbon nanofiber aerogels. Then, modeling and characterization of the freeze cast particle-containing carbon nanofibers will be presented with an emphasis on modeling the thermal conductivity and electrical conductivity of the carbon nanofiber network aerogels. After that, the applications of the carbon nanofiber aerogels will be described. Examples of energy converters, supercapacitors, secondary battery electrodes, dye absorbents, sensors, and catalysts made from composite carbon nanofiber aerogels will be shown. Finally, the perspectives to future work will be presented.

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Section: Polyacrylonitrile (Pan) Derived Composite Carbon Nanofiber A...mentioning

confidence: 99%

“…Adding PMMA facilitates pore formation through the vaporizing and releasing the high temperature decomposed products. Joo et al [27] made preliminary studies of carbon films from PMMA-PAN blends. The carbon films showed the structures with specific surface textures.…”

Section: Polyacrylonitrile (Pan) Derived Composite Carbon Nanofiber A...mentioning

confidence: 99%

Advances in Manufacturing Composite Carbon Nanofiber-Based Aerogels

Gan

2020

J. Compos. Sci.

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“…Since PMMA and PAN are immiscible [35], the phase separation of PAN and PMMA happened. Under the action of the electric force during the electrospinning process, the PAN/PMMA interface is unstable because of the difference in the dielectric constants of PAN and PMMA [32]. The separation of PAN and PMMA can also promote the instability of the fiber/air interface.…”

Section: Role Of Pmmamentioning

confidence: 99%

“…The studies of heat treatment on PAN focus on two major categories, i.e., low temperature thermal oxidative stabilization [26][27][28][29][30] and high temperature carbonization [31][32][33][34]. Low temperature treatment of PAN refers to the temperature range from room temperature up to 300 • C [26,27].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Pyrolysis Temperature on the Electrical Property and Photosensitivity of a PAN-PMMA Derived Carbon Fiber

Nguyen

Rosas

et al. 2019

ChemEngineering

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Fibers are promising materials being utilized in electronics, principally in the areas of capacitors and sensors. In this study, we examine the effect of pyrolysis temperature on the electrical conductive behavior and photosensitivity of a carbon-based fiber, which was made by electrospinning a polymer solution containing polyacrylonitrile (PAN), polymethyl methacrylate (PMMA), and dimethylformamide (DMF). Converting the polymeric fiber into a carbon fiber was performed through the controlled pyrolysis during which oxidation, stabilization, and carbonization happened. After oxidation at an elevated temperature, the linear polymer fiber was stabilized to have a backbone structure. Then the oxidized fiber was treated in an even higher temperature range to be partially carbonized under the protection of argon gas. We utilized multiple samples of the fibers treated at various pyrolysis temperatures inside a heat furnace and examined the effects of the temperatures on the properties. The partially carbonized fiber is highly active in view of electron generation under photon energy excitation. The unique electrical and photovoltaic property are due to their semiconducting behavior. The morphology of the specimen before and after the pyrolysis was examined using scanning electron microscopy (SEM). The SEM images displayed the shrinkage of the fiber due to the pyrolysis. There are two stages of pyrolysis kinetics. Stage I is related to the oxidation of the PAN polymer. Stage II is associated with the carbonization and the activation energy of carbonization is calculated as 118 kJ/mol.

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Recent progress in non-photolithographic patterning of polymer thin films

Qiu

Zhou

et al. 2023

Progress in Polymer Science

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Study on peculiar carbon pattern formation from polymer blend thin films under electric fields

Cited by 3 publications

References 24 publications

Advances in Manufacturing Composite Carbon Nanofiber-Based Aerogels

Advances in Manufacturing Composite Carbon Nanofiber-Based Aerogels

Effect of Pyrolysis Temperature on the Electrical Property and Photosensitivity of a PAN-PMMA Derived Carbon Fiber

Recent progress in non-photolithographic patterning of polymer thin films

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