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dc.contributor.authorNakanishi, Kenichien
dc.contributor.authorHofmann, Stephanen
dc.date.accessioned2020-02-06T00:30:33Z
dc.date.available2020-02-06T00:30:33Z
dc.date.issued2020-02-01en
dc.identifier.issn2166-532X
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/301760
dc.description.abstractCarbon foams are a highly attractive class of low-density materials whose structural, electrical, thermal, and chemical properties are strongly linked to the level of graphitization and 3D structure. Pyrolytic graphitization requires very high temperatures (>2000 °C), and most current graphitic foams are stochastically arranged with restricted control over pore size and architecture. We report on the shrinkage and catalytic conversion of commercial polymer foams and 3D printed templates as a facile, cost-effective method to scalably reach and control sub-200 µm unit cell sizes and a high level of graphitization at temperatures below 1100 °C. We demonstrate the conversion of 3D printed cubic polymer lattices to an identically shaped carbonaceous network with shrinkage controlled via an atomic layer deposited oxide coating up to a maximum 125 fold decrease in volume and over 95% mass loss through slow carbonization. This is accompanied by a reduction in the unit cell size from 1000 µm to 170 µm and strut widths from 550 µm to 65 µm . The structures are subsequently coated with a sacrificial metal catalyst by electroless deposition to achieve efficient graphitization while maintaining structural order. We discuss the underlying mechanisms and opportunities to tailor the processes and structure to manifold application needs.
dc.publisherAIP Publishing LLC
dc.rightsAll rights reserved
dc.rights.uri
dc.titleOrdered graphitic microfoams via shrinkage and catalytic conversion of polymer scaffoldsen
dc.typeArticle
prism.issueIdentifier2en
prism.publicationDate2020en
prism.publicationNameAPL Materialsen
prism.volume8en
dc.identifier.doi10.17863/CAM.48834
dcterms.dateAccepted2020-01-26en
rioxxterms.versionofrecord10.1063/1.5136235en
rioxxterms.versionAM
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2020-02-01en
dc.contributor.orcidNakanishi, Kenichi [0000-0003-3816-1806]
dc.contributor.orcidHofmann, Stephan [0000-0001-6375-1459]
dc.identifier.eissn2166-532X
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idEPSRC (1504244)
pubs.funder-project-idEPSRC (EP/K016636/1)
pubs.funder-project-idEPSRC (EP/G037221/1)
pubs.funder-project-idEuropean Commission Horizon 2020 (H2020) ERC (206409)
pubs.funder-project-idEuropean Research Council (279342)
cam.orpheus.successMon Jun 08 08:19:39 BST 2020 - The item has an open VoR version.*
rioxxterms.freetoread.startdate2023-02-05


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