Formation mechanism of carbon foams derived from mesophase pitch
Carbon foams are comprised of an assembly of pores surrounded by archwise highly aligned graphitic belts. [Display omitted] ► Carbon foams are comprised of pores surrounded by archwise graphite belts. ► The bubble growth generates a shear stress to force aromatic planes to parallel to axis of ligame...
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| Veröffentlicht in: | Carbon (New York) 2011-02, Vol.49 (2), p.618-624 |
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| container_title | Carbon (New York) |
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| creator | Li, Sizhong Tian, Yongming Zhong, Yajuan Yan, Xi Song, Yan Guo, Quangui Shi, Jingli Liu, Lang |
| description | Carbon foams are comprised of an assembly of pores surrounded by archwise highly aligned graphitic belts.
[Display omitted]
► Carbon foams are comprised of pores surrounded by archwise graphite belts. ► The bubble growth generates a shear stress to force aromatic planes to parallel to axis of ligament. ► The viscosity and surface tension of molten pitch are major factors influence the growth of bubbles. ► After graphitization, the well aligned aromatic planes evolve into highly aligned graphite.
Carbon foams were prepared from mesophase pitch using foaming, carbonization and graphitization processes. The physical and chemical properties of the mesophase pitch during thermal treatment were studied by Fourier transform infrared spectroscopy, thermogravimetry, mass spectroscopy, rheometry and scanning electron microscopy. The results suggest that gases released from the pitch dissolve, saturate, nucleate and grow in the molten pitch during foaming. Then the resultant bubbles coalesced with the neighboring bubbles driven by the surface tension of the molten pitch. This coalescence generates a shear stress to force aromatic planes of the pitch to arrange regularly and paralleled to the axis of a ligament. The growth of bubbles stopped when the pitch became semi-coke at a temperature above 733
K. The viscosity and surface tension of the molten pitch are major factors that influence the growth of bubbles. After carbonization at 1073
K and graphitization at 2873
K, the well aligned aromatic planes in the foams evolve into highly aligned graphitic structures. |
| doi_str_mv | 10.1016/j.carbon.2010.10.007 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_miscellaneous_849477408</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><els_id>S0008622310007177</els_id><sourcerecordid>849477408</sourcerecordid><originalsourceid>FETCH-LOGICAL-c392t-af285cec974fe7793a0bb79a235d4123d0d9312cc02344078acacd509801c8103</originalsourceid><addsrcrecordid>eNp9kE1rGzEQhkVoIW6afxDIXkpP64w-vJIupSXkCwI5tDmL8awUy3hXrrQJ5N9HzoYeexo0PPPO6GHsjMOSA-8utkvCvE7jUsB7awmgj9iCGy1baSz_xBYAYNpOCHnMvpSyrU9luFqwn9cpDzjFNDaDpw2OsQxNCs0c2ISEQ2l6n-OL75uQ01CxkvYbLL7Zx4k2X9nngLviTz_qCXu8vvpzedveP9zcXf66b0laMbUYhFmRJ6tV8FpbibBea4tCrnrFheyht5ILIhBSKdAGCalfgTXAyXCQJ-z7nLvP6e-zL5MbYiG_2-Ho03NxRlmltQJTSTWTlFMp2Qe3z3HA_Oo4uIMvt3Xz99zB16FbfdWxbx8LsBDuQsaRYvk3K2QnOwu8cuczFzA5fMqVefxdg1bVqe4AbCV-zISvPl6iz65Q9CP5PmZPk-tT_P8pb97Cir0</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>849477408</pqid></control><display><type>article</type><title>Formation mechanism of carbon foams derived from mesophase pitch</title><source>Access via ScienceDirect (Elsevier)</source><creator>Li, Sizhong ; Tian, Yongming ; Zhong, Yajuan ; Yan, Xi ; Song, Yan ; Guo, Quangui ; Shi, Jingli ; Liu, Lang</creator><creatorcontrib>Li, Sizhong ; Tian, Yongming ; Zhong, Yajuan ; Yan, Xi ; Song, Yan ; Guo, Quangui ; Shi, Jingli ; Liu, Lang</creatorcontrib><description>Carbon foams are comprised of an assembly of pores surrounded by archwise highly aligned graphitic belts.
[Display omitted]
► Carbon foams are comprised of pores surrounded by archwise graphite belts. ► The bubble growth generates a shear stress to force aromatic planes to parallel to axis of ligament. ► The viscosity and surface tension of molten pitch are major factors influence the growth of bubbles. ► After graphitization, the well aligned aromatic planes evolve into highly aligned graphite.
Carbon foams were prepared from mesophase pitch using foaming, carbonization and graphitization processes. The physical and chemical properties of the mesophase pitch during thermal treatment were studied by Fourier transform infrared spectroscopy, thermogravimetry, mass spectroscopy, rheometry and scanning electron microscopy. The results suggest that gases released from the pitch dissolve, saturate, nucleate and grow in the molten pitch during foaming. Then the resultant bubbles coalesced with the neighboring bubbles driven by the surface tension of the molten pitch. This coalescence generates a shear stress to force aromatic planes of the pitch to arrange regularly and paralleled to the axis of a ligament. The growth of bubbles stopped when the pitch became semi-coke at a temperature above 733
K. The viscosity and surface tension of the molten pitch are major factors that influence the growth of bubbles. After carbonization at 1073
K and graphitization at 2873
K, the well aligned aromatic planes in the foams evolve into highly aligned graphitic structures.</description><identifier>ISSN: 0008-6223</identifier><identifier>EISSN: 1873-3891</identifier><identifier>DOI: 10.1016/j.carbon.2010.10.007</identifier><identifier>CODEN: CRBNAH</identifier><language>eng</language><publisher>Kidlington: Elsevier Ltd</publisher><subject>Alignment ; aromatic compounds ; Bubbles ; Carbon ; carbonization ; chemical structure ; Chemistry ; Colloidal state and disperse state ; Cross-disciplinary physics: materials science; rheology ; Emulsions. Microemulsions. Foams ; Exact sciences and technology ; Foaming ; Foams ; Fourier transform infrared spectroscopy ; Fullerenes and related materials; diamonds, graphite ; gases ; General and physical chemistry ; graphene ; heat treatment ; ligaments ; mass spectrometry ; Materials science ; melting ; Mesophase ; Physics ; Planes ; rheology ; scanning electron microscopy ; shear stress ; Specific materials ; Surface physical chemistry ; Surface tension ; temperature ; thermogravimetry ; viscosity</subject><ispartof>Carbon (New York), 2011-02, Vol.49 (2), p.618-624</ispartof><rights>2010 Elsevier Ltd</rights><rights>2015 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c392t-af285cec974fe7793a0bb79a235d4123d0d9312cc02344078acacd509801c8103</citedby><cites>FETCH-LOGICAL-c392t-af285cec974fe7793a0bb79a235d4123d0d9312cc02344078acacd509801c8103</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.carbon.2010.10.007$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=23636901$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Li, Sizhong</creatorcontrib><creatorcontrib>Tian, Yongming</creatorcontrib><creatorcontrib>Zhong, Yajuan</creatorcontrib><creatorcontrib>Yan, Xi</creatorcontrib><creatorcontrib>Song, Yan</creatorcontrib><creatorcontrib>Guo, Quangui</creatorcontrib><creatorcontrib>Shi, Jingli</creatorcontrib><creatorcontrib>Liu, Lang</creatorcontrib><title>Formation mechanism of carbon foams derived from mesophase pitch</title><title>Carbon (New York)</title><description>Carbon foams are comprised of an assembly of pores surrounded by archwise highly aligned graphitic belts.
[Display omitted]
► Carbon foams are comprised of pores surrounded by archwise graphite belts. ► The bubble growth generates a shear stress to force aromatic planes to parallel to axis of ligament. ► The viscosity and surface tension of molten pitch are major factors influence the growth of bubbles. ► After graphitization, the well aligned aromatic planes evolve into highly aligned graphite.
Carbon foams were prepared from mesophase pitch using foaming, carbonization and graphitization processes. The physical and chemical properties of the mesophase pitch during thermal treatment were studied by Fourier transform infrared spectroscopy, thermogravimetry, mass spectroscopy, rheometry and scanning electron microscopy. The results suggest that gases released from the pitch dissolve, saturate, nucleate and grow in the molten pitch during foaming. Then the resultant bubbles coalesced with the neighboring bubbles driven by the surface tension of the molten pitch. This coalescence generates a shear stress to force aromatic planes of the pitch to arrange regularly and paralleled to the axis of a ligament. The growth of bubbles stopped when the pitch became semi-coke at a temperature above 733
K. The viscosity and surface tension of the molten pitch are major factors that influence the growth of bubbles. After carbonization at 1073
K and graphitization at 2873
K, the well aligned aromatic planes in the foams evolve into highly aligned graphitic structures.</description><subject>Alignment</subject><subject>aromatic compounds</subject><subject>Bubbles</subject><subject>Carbon</subject><subject>carbonization</subject><subject>chemical structure</subject><subject>Chemistry</subject><subject>Colloidal state and disperse state</subject><subject>Cross-disciplinary physics: materials science; rheology</subject><subject>Emulsions. Microemulsions. Foams</subject><subject>Exact sciences and technology</subject><subject>Foaming</subject><subject>Foams</subject><subject>Fourier transform infrared spectroscopy</subject><subject>Fullerenes and related materials; diamonds, graphite</subject><subject>gases</subject><subject>General and physical chemistry</subject><subject>graphene</subject><subject>heat treatment</subject><subject>ligaments</subject><subject>mass spectrometry</subject><subject>Materials science</subject><subject>melting</subject><subject>Mesophase</subject><subject>Physics</subject><subject>Planes</subject><subject>rheology</subject><subject>scanning electron microscopy</subject><subject>shear stress</subject><subject>Specific materials</subject><subject>Surface physical chemistry</subject><subject>Surface tension</subject><subject>temperature</subject><subject>thermogravimetry</subject><subject>viscosity</subject><issn>0008-6223</issn><issn>1873-3891</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><recordid>eNp9kE1rGzEQhkVoIW6afxDIXkpP64w-vJIupSXkCwI5tDmL8awUy3hXrrQJ5N9HzoYeexo0PPPO6GHsjMOSA-8utkvCvE7jUsB7awmgj9iCGy1baSz_xBYAYNpOCHnMvpSyrU9luFqwn9cpDzjFNDaDpw2OsQxNCs0c2ISEQ2l6n-OL75uQ01CxkvYbLL7Zx4k2X9nngLviTz_qCXu8vvpzedveP9zcXf66b0laMbUYhFmRJ6tV8FpbibBea4tCrnrFheyht5ILIhBSKdAGCalfgTXAyXCQJ-z7nLvP6e-zL5MbYiG_2-Ho03NxRlmltQJTSTWTlFMp2Qe3z3HA_Oo4uIMvt3Xz99zB16FbfdWxbx8LsBDuQsaRYvk3K2QnOwu8cuczFzA5fMqVefxdg1bVqe4AbCV-zISvPl6iz65Q9CP5PmZPk-tT_P8pb97Cir0</recordid><startdate>20110201</startdate><enddate>20110201</enddate><creator>Li, Sizhong</creator><creator>Tian, Yongming</creator><creator>Zhong, Yajuan</creator><creator>Yan, Xi</creator><creator>Song, Yan</creator><creator>Guo, Quangui</creator><creator>Shi, Jingli</creator><creator>Liu, Lang</creator><general>Elsevier Ltd</general><general>Elsevier</general><scope>FBQ</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20110201</creationdate><title>Formation mechanism of carbon foams derived from mesophase pitch</title><author>Li, Sizhong ; Tian, Yongming ; Zhong, Yajuan ; Yan, Xi ; Song, Yan ; Guo, Quangui ; Shi, Jingli ; Liu, Lang</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c392t-af285cec974fe7793a0bb79a235d4123d0d9312cc02344078acacd509801c8103</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>Alignment</topic><topic>aromatic compounds</topic><topic>Bubbles</topic><topic>Carbon</topic><topic>carbonization</topic><topic>chemical structure</topic><topic>Chemistry</topic><topic>Colloidal state and disperse state</topic><topic>Cross-disciplinary physics: materials science; rheology</topic><topic>Emulsions. Microemulsions. Foams</topic><topic>Exact sciences and technology</topic><topic>Foaming</topic><topic>Foams</topic><topic>Fourier transform infrared spectroscopy</topic><topic>Fullerenes and related materials; diamonds, graphite</topic><topic>gases</topic><topic>General and physical chemistry</topic><topic>graphene</topic><topic>heat treatment</topic><topic>ligaments</topic><topic>mass spectrometry</topic><topic>Materials science</topic><topic>melting</topic><topic>Mesophase</topic><topic>Physics</topic><topic>Planes</topic><topic>rheology</topic><topic>scanning electron microscopy</topic><topic>shear stress</topic><topic>Specific materials</topic><topic>Surface physical chemistry</topic><topic>Surface tension</topic><topic>temperature</topic><topic>thermogravimetry</topic><topic>viscosity</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Li, Sizhong</creatorcontrib><creatorcontrib>Tian, Yongming</creatorcontrib><creatorcontrib>Zhong, Yajuan</creatorcontrib><creatorcontrib>Yan, Xi</creatorcontrib><creatorcontrib>Song, Yan</creatorcontrib><creatorcontrib>Guo, Quangui</creatorcontrib><creatorcontrib>Shi, Jingli</creatorcontrib><creatorcontrib>Liu, Lang</creatorcontrib><collection>AGRIS</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Carbon (New York)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Li, Sizhong</au><au>Tian, Yongming</au><au>Zhong, Yajuan</au><au>Yan, Xi</au><au>Song, Yan</au><au>Guo, Quangui</au><au>Shi, Jingli</au><au>Liu, Lang</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Formation mechanism of carbon foams derived from mesophase pitch</atitle><jtitle>Carbon (New York)</jtitle><date>2011-02-01</date><risdate>2011</risdate><volume>49</volume><issue>2</issue><spage>618</spage><epage>624</epage><pages>618-624</pages><issn>0008-6223</issn><eissn>1873-3891</eissn><coden>CRBNAH</coden><abstract>Carbon foams are comprised of an assembly of pores surrounded by archwise highly aligned graphitic belts.
[Display omitted]
► Carbon foams are comprised of pores surrounded by archwise graphite belts. ► The bubble growth generates a shear stress to force aromatic planes to parallel to axis of ligament. ► The viscosity and surface tension of molten pitch are major factors influence the growth of bubbles. ► After graphitization, the well aligned aromatic planes evolve into highly aligned graphite.
Carbon foams were prepared from mesophase pitch using foaming, carbonization and graphitization processes. The physical and chemical properties of the mesophase pitch during thermal treatment were studied by Fourier transform infrared spectroscopy, thermogravimetry, mass spectroscopy, rheometry and scanning electron microscopy. The results suggest that gases released from the pitch dissolve, saturate, nucleate and grow in the molten pitch during foaming. Then the resultant bubbles coalesced with the neighboring bubbles driven by the surface tension of the molten pitch. This coalescence generates a shear stress to force aromatic planes of the pitch to arrange regularly and paralleled to the axis of a ligament. The growth of bubbles stopped when the pitch became semi-coke at a temperature above 733
K. The viscosity and surface tension of the molten pitch are major factors that influence the growth of bubbles. After carbonization at 1073
K and graphitization at 2873
K, the well aligned aromatic planes in the foams evolve into highly aligned graphitic structures.</abstract><cop>Kidlington</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.carbon.2010.10.007</doi><tpages>7</tpages></addata></record> |
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| subjects | Alignment aromatic compounds Bubbles Carbon carbonization chemical structure Chemistry Colloidal state and disperse state Cross-disciplinary physics: materials science rheology Emulsions. Microemulsions. Foams Exact sciences and technology Foaming Foams Fourier transform infrared spectroscopy Fullerenes and related materials diamonds, graphite gases General and physical chemistry graphene heat treatment ligaments mass spectrometry Materials science melting Mesophase Physics Planes rheology scanning electron microscopy shear stress Specific materials Surface physical chemistry Surface tension temperature thermogravimetry viscosity |
| title | Formation mechanism of carbon foams derived from mesophase pitch |
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