Iingcingo ezikrwada ezisekwe kwi-PAN kufuneka zifakwe i-oxidized kwangaphambili, iqondo lobushushu elisezantsi lekhabhoni, kunye nobushushu obuphezulu bekhabhoni ukuze buyike.iifayibha zekhabhoni, kwaye emva koko yenziwe igraphite ukwenza imicu yegraphite. Ubushushu bufikelela kwi-200℃ ukuya kwi-2000-3000℃, eyenza ukusabela okwahlukileyo kwaye yenze izakhiwo ezahlukeneyo, ezinokuthi zibe neepropati ezahlukeneyo.
1. Inqanaba lePyrolysis:I-oxidation yangaphambili kwindawo yobushushu obuphantsi, i-carbonization yobushushu obuphantsi kwindawo ephezulu yobushushu
I-arylation yangaphambi kwe-oxidation yenzeke, ubude bemizuzu ephantse ibe yi-100, iqondo lobushushu le-200-300 ℃, injongo ye-thermoplastic PAN ye-macromolecular chain ye-macromolecular kwi-non-plastiki ukumelana nokushisa kwe-trapezoidal, eyona ndlela yokusabela kwi-macromolecular chain of cyclization kunye ne-intermolecular crosslinking reaction, ehamba kunye ne-intermolecular crosslinking reaction. Isalathisi se-arylation ngokuqhelekileyo si-40-60%.
Ubushushu obuphantsi be-carbonizationngokubanzi 300-800 ℃, ikakhulu thermal ukuqhekeka reaction, ubukhulu becala usebenzisa eliphezulu-ubushushu bombane wire eziko ukufudumeza, iqonga uvelisa isixa esikhulu segesi yokukhupha netela,.
Iimpawu: Umbala we-fiber oxidized pre-oxidized uya kuba mnyama, ngokuqhelekileyo umnyama, kodwa ugcina i-morphology yefiber, isakhiwo sangaphakathi siye safumana iqondo elithile lokutshintsha kweekhemikhali, ukubunjwa kwenani lamaqela asebenzayo ane-oksijini kunye nesakhiwo sokudibanisa, ukubeka isiseko se-carbonization elandelayo.
2. (Ubushushu obuphezulu) isigaba se-carbonization, i-pre-oxidation ye-precursor kwi-atmosphere ye-inert kwi-decomposition ephezulu yokushisa, ukususwa kwayo ngaphezu kwe-carbon heteroatoms (efana ne-oksijini, i-hydrogen, i-nitrogen, njl.), ukwenzela ukuba i-carbonization ngokuthe ngcembe, ukubunjwa kwe-carbon amorphous okanye i-microcrystalline carbon structure. Le nkqubo linyathelo eliphambili ekubunjweni kwekhabhoni skeleton. Iqondo lobushushu liphakathi kwe-1000-1800 ℃, ikakhulu i-thermal condensation reaction, uninzi lwezifudumezi zegraphite zisetyenziselwa ukufudumeza.
Iimpawu: Inxalenye ephambili ye-carbonized material yi-carbon, isakhiwo sininzi i-amorphous carbon okanye i-chaotic graphite structure, i-conductivity yayo yombane, iipropati zomatshini xa kuthelekiswa nemveliso yangaphambili ye-oxidation inokwanda okukhulu.
3. IGraphitizationkunyango olongezelelweyo lobushushu beemveliso ze-carbonization kumaqondo obushushu aphezulu ukukhuthaza ukwakhiwa kwekhabhoni ye-amorphous okanye i-microcrystalline carbon kwisakhiwo sekristale yegraphite enocwangco. Ngesenzo sobushushu obuphezulu, iiathom zekhabhoni zihlengahlengiswa ukuze zenze i-hexagonal lattice layer ene-orientation ephezulu, ngaloo ndlela iphucula kakhulu umbane kunye ne-thermal conductivity kunye namandla omatshini wezinto eziphathekayo.
Iimpawu: Imveliso yegraphiti inesakhiwo segraphite esinekristale kakhulu, esibonelela ngokugqwesileyo kombane kunye ne-thermal conductivity, kunye namandla athile aphezulu kunye nemodyuli ethile. Umzekelo, imodyuli ephezuluiifayibha zekhabhonizifunyenwe ngeqondo eliphezulu legraphitization.
Amanyathelo athile kunye neemfuno zezixhobo ze-pre-oxidation, i-carbonization kunye ne-graphitization:
I-pre-oxidation: iqhutyelwa emoyeni kwiqondo lokushisa elilawulwa yi-200-300 ° C. Uxinzelelo kufuneka lufakwe ukunciphisa ukucutheka kwefayibha.
I-Carbonization: iqhutyelwa kwi-atmosphere ye-inert kunye nokunyuka kancinci kwiqondo lokushisa ukuya kwi-1000-2000 ° C.
I-Graphitization: iqhutyelwa kumaqondo obushushu aphezulu (2000-3000 ° C), ngokuqhelekileyo kwi-vacuum okanye kwindawo engasebenzi.
Ixesha lokuposa: May-22-2025
