Graphitization behavior of Kapton-derived carbon film related to structure, microtexture and transport properties

Hishiyama, Yoshihiro; Igarashi, Kazunori; Kanaoka, I.; Fujii, Hiroki; Kaneda, Takaho; Koidesawa, T.; Shimazawa, Y.; Yoshida, Akira

doi:10.1016/s0008-6223(97)00021-3

Cited by 60 publications

(21 citation statements)

References 19 publications

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“…Different precursors to glass-like carbon exist, including phenolic resins, polyfurfuryl alcohols, cellulose, polyvinyl chloride and polyimides [43][44][45][46][47][48][49][50][51][52][53]; and the degree of shrinkage and carbon yield, the ratio of the weight of carbon to the weight of the original polymer sample, varies depending on the choice. For example, phenol-formaldehyde, polyfurfuryl alcohol and polyvinyl alcohol have the highest yields, with approximately 50% carbon.…”

Section: Carbonizationmentioning

confidence: 99%

SU-8 Photolithography as a Toolbox for Carbon MEMS

Martínez-Duarte

2014

Micromachines

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Abstract:The use of SU-8 as precursor for glass-like carbon, or glassy carbon, is presented here. SU-8 carbonizes when subject to high temperature under inert atmosphere. Although epoxy-based precursors can be patterned in a variety of ways, photolithography is chosen due to its resolution and reproducibility. Here, a number of improvements to traditional photolithography are introduced to increase the versatility of the process. The shrinkage of SU-8 during carbonization is then detailed as one of the guidelines necessary to design carbon patterns. A couple of applications-(1) carbon-electrode dielectrophoresis for bioparticle manipulation; and (2) the use of carbon structures as micro-molds are also presented.

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Section: Carbonizationmentioning

confidence: 99%

SU-8 Photolithography as a Toolbox for Carbon MEMS

Martínez-Duarte

2014

Micromachines

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“…3,4 Graphite lms derived from PMDA-ODA-type PI lms can obtain an ultrahigh thermal conductivity of 1700 W m À1 K À1 in the plane direction. 5 Many researchers have studied the inuence of chemical structure, 6,7 drawing ratio, 8,9 and heat-treating 10 conditions on the performance of graphite lms. Various identication methods 11,12 have been used to illustrate the mechanism of pyrolysis strategy of polyimide lms, and the behaviour of polyimide lms has also been examined.…”

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confidence: 99%

“…Various identication methods 11,12 have been used to illustrate the mechanism of pyrolysis strategy of polyimide lms, and the behaviour of polyimide lms has also been examined. 6,[13][14][15] PI bres are a class of high performance polymer bres, which are used mainly in heat resistance areas such as high temperature dust removal and ame-retardant protective clothing. Researchers have found that PI bres can be transformed into graphite bres with thermal conductivity higher than that of PAN-based carbon bres through simple heat treatment.…”

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confidence: 99%

The effect of doping graphene oxide on the structure and property of polyimide-based graphite fibre

Meng

et al. 2017

RSC Adv.

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Herein, graphite fibres were prepared from polyimide (PI) fibres by doping varying contents of graphene oxide (GO) into polyimide (PI) fibres through a carbonization and graphitization process. By in situ polymerization, GO/polyamic acid (PAA) was synthesized and used for preparing GO/PI fibres via dry-jet wet spinning. During the spinning process, the molecular orientation of GO/PI fibres was forced to follow the fibre axis under the strong sheer force at the spinneret. The DSC results show that the exothermic intensity of 1.0 wt% GO/PI composite fibres declined by 69.7% than that of the pure PI fibre; this prevented the breakage of PI molecular chains and maintained the preferred orientation of the GO/ PI fibres. During the graphitization process, GO sheets were reduced to grain graphene, acting as nucleus crystals, which could enlarge the size of microcrystals of graphite and increase the degree of graphitization. PI fibres as a carbon precursor showed great potential in the preparation of graphite fibres with high thermal conductivity, and GO doping can improve the thermal conductivity of the composite graphite fibres. When 2.0 wt% GO was added, the thermal conductivity of the GO/PI composite graphite fibre could reach 435 W m À1 K À1, which was twice that of the pure PI-based graphite fibre.

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“…The net structure of these GNFs consists of a graphite-like structure, which forms a turbostratic-oriented graphite layer. Generally, this type of structure has been obtained from carbonization of rigid polymers such as Kapton imides, in [32]. However, the electrospun thermoplastic nanofibers also transformed to form a well ordered graphite structure similar to natural graphite through catalytic graphitization during carbonization.…”

Section: Resultsmentioning

confidence: 99%