Maitiro ekusiyanisa musiyano uripo pakati pe pre-oxidation/carbonization/graphitization

Waya dzisina kugadzirwa dzinofanira kunge dzakagadzirwa nepan, dzakagadzirwa necarbon dioxide pakupisa kushoma, uye dzakagadzirwa necarbon dioxide pakupisa kwakanyanya kuti dziumbwe.firita dzekabhoni, uye yozogadzirwa negirafiti kugadzira girafiti. Tembiricha yacho inosvika pa200℃ kusvika 2000-3000℃, iyo inoita maitiro akasiyana uye inoumba maumbirwo akasiyana, ayo ane hunhu hwakasiyana.
1. Danho rePyrolysis:Kupisa kwemafuta muchikamu chekupisa kwakaderera, kupisa kwemafuta muchikamu chekupisa kwakaderera
Kupisa kwemasero kunoitika mushure mekuoxidation, kwenguva yakareba kwemaminitsi angangoita zana, tembiricha ye200-300 ℃, chinangwa ndechekuisa cheni ye macromolecular ye thermoplastic PAN muchimiro che trapezoidal chinodzivirira kupisa, iyo inonyanya kuita kuti cheni ye macromolecular ye cyclization uye intermolecular crosslinking ienderane, ichiperekedzwa ne pyrolysis reaction uye kuburitswa kwemamorekuru madiki akawanda. Iyo arylation index inowanzo kuve 40-60%.
Kupisa kwecarbonization yekupisa kwakadererakazhinji kacho 300-800 ℃, kunyanya kupisa kunoputika, kunyanya kushandisa kupisa kwewaya yemagetsi yechoto, nhanho yacho inogadzira huwandu hwakawanda hwegasi rinobuda muutsi netara.
Hunhu: Ruvara rwefiber yakasanganiswa neokisijeni ruchava rwakasviba, kazhinji rutema, asi ruchiri kuramba rwakaita serwuri, chimiro chemukati chakachinja makemikari, kuumbwa kwemapoka akawanda ane okisijeni uye chimiro chinobatanidza, zvichiisa hwaro hwecarbonization inotevera.
2. Danho rekugadzira carbonization (yepamusoro-tembiricha), ndiko kusanganiswa kwechinhu chinotangira mumhepo isina simba pakuora kwekupisa kwakanyanya, kubviswa kwacho kuwedzera kune ma heteroatoms ekabhoni (akadai seokisijeni, hydrogen, nitrogen, nezvimwewo), kuitira kuti carbonization iwedzere zvishoma nezvishoma, kuumbwa kwe amorphous kabhoni kana microcrystalline carbon structure. Maitiro aya idanho guru pakuumbwa kwe carbon skeleton. Tembiricha inowanzo kuve pakati pe 1000-1800 ℃, kunyanya thermal condensation reaction, ma graphite heater mazhinji anoshandiswa kudziyisa.
Hunhu: Chikamu chikuru chezvinhu zvakakangwa icarbon, chimiro chacho chinowanzova amorphous kabhoni kana chaotic graphite structure, magetsi ayo conductivity, michina features zvichienzaniswa ne pre-oxidation product ine kuwedzera kukuru.
3. Kugadzira mifananidzoinzira yekuwedzera yekurapa kupisa kwezvigadzirwa zve carbonization pakupisa kwakanyanya kukurudzira chimiro che amorphous carbon kana microcrystalline carbon kune chimiro che graphite crystal chakarongeka. Kuburikidza nekushanda kwekupisa kwakanyanya, maatomu e carbon anogadziriswazve kuti aumbe chimiro che hexagonal lattice layer chine mwero wepamusoro wekutarisa, nokudaro zvichivandudza zvakanyanya kufambisa kwemagetsi nekupisa uye simba remakanika rechinhu chacho.
Hunhu: Chigadzirwa chine graphite chine chimiro che graphite chakasimba, icho chinopa kufambisa kwemagetsi nekupisa kwakanaka, pamwe nesimba rakawanda uye modulus chaiyo. Semuenzaniso, modulus ine graphite yakawandafirita dzekabhoniinowanikwa kuburikidza nedhigirii rakakura regraphitization.
Matanho chaiwo uye zvinodiwa zvemidziyo yekugadzirira oxidation, carbonization uye graphitization:
Kuisa oxidation mumhepo: kunoitwa mumhepo patembiricha inodzorwa ye200-300°C. Kumanikidzwa kunofanirwa kushandiswa kuderedza kuderera kwefiber.
Kugadzira carbonization: kunoitwa mumhepo isina chinhu ine tembiricha inowedzera zvishoma nezvishoma kusvika pa1000-2000°C.
Kugadzira mifananidzo: kunoitwa pakupisa kwakanyanya (2000-3000°C), kazhinji mumhepo isina kuchena kana kuti mumhepo isina kuchena.