Pono nā uea maka i hoʻokumu ʻia i ka PAN e pre-oxidized, carbonized haʻahaʻa haʻahaʻa, a carbonized wela kiʻekiʻe e hana.kalapona kalapona, a laila kiʻi ʻia e hana i nā fiber graphite. Aia ka mahana mai 200 ℃ a 2000-3000 ℃, e lawe ana i nā ʻano like ʻole a hoʻokumu i nā hale like ʻole, a he mau waiwai like ʻole.
1. Pyrolysis pae:Pre-oxidation i loko o ka haʻahaʻa haʻahaʻa haʻahaʻa, haʻahaʻa-mehana carbonization ma ka kiʻekiʻe-mehana hapa.
Hoʻomaka ka pre-oxidation arylation, ʻo ka lōʻihi o kahi kokoke i 100 mau minuke, ka mahana o 200-300 ℃, ke kumu o ka thermoplastic PAN linear macromolecular kaulahao i loko o ka ʻano trapezoidal wela-wela ʻole, ka hopena nui no ke kaulahao macromolecular o ka cyclization a me ka intermolecular crosslinking, i hui pū ʻia me ka hoʻokuʻu ʻana o ka maʻi maʻemaʻe. ʻO ka helu helu arylation he 40-60%.
Haʻahaʻa-maha wela carbonizationʻO ka maʻamau 300-800 ℃, ka nui o ka hoʻoheheʻe ʻana i ka wela, ka hapa nui o ka hoʻohana ʻana i ka wela wela o ka umu uila uea, hoʻopuka ke kahua i ka nui o ke kinoea hoʻopau a me ka tar,.
Nā hiʻohiʻona: E lilo ke kala o ka fiber pre-oxidized i ʻeleʻele, maʻamau ʻeleʻele, akā paʻa mau ka morphology o ka fiber, ua hoʻololi ʻia ka hale o loko i kekahi degere o nā hoʻololi kemika, ka hoʻokumu ʻana o kekahi mau pūʻulu hana i loko o ka oxygen a me ka hoʻonohonoho cross-linking, e kau ana i ke kumu no ka carbonization ma hope.
2. (Kiʻekiʻe-mahana) carbonization pae, 'o ia ka pre-oxidation o ka precursor i loko o ka inert lewa i kiʻekiʻe wela decomposition, ka wehe 'ana o ia me ka carbon heteroatoms (e like me ka oxygen, hydrogen, nitrogen, etc.), no laila, i ka gradual carbonization, ke kukuluia'na o amorphous kalapona a microcrystalline kalapona hale. ʻO kēia kaʻina hana he ʻanuʻu nui i ka hoʻokumu ʻana i ka iwi kalapona. ʻO ka mahana ma waena o 1000-1800 ℃, ka nui o ka hopena condensation thermal, hoʻohana ʻia ka hapa nui o nā mea wela graphite no ka hoʻomehana.
Nā ʻano: ʻO ka mea nui o ka mea carbonized he kalapona, ʻo ka hale ka nui o ka carbon amorphous a i ʻole chaotic graphite structure, kona conductivity uila, nā waiwai mechanical i hoʻohālikelike ʻia i ka huahana pre-oxidation he piʻi nui.
3. Hoʻokalakala kiʻiʻO ia ka hoʻomaʻamaʻa wela hou aʻe o nā huahana carbonization ma nā mahana kiʻekiʻe e hāpai i ke ʻano o ke kalapona amorphous a i ʻole microcrystalline carbon i kahi ʻano aniani graphite ʻoi aku ka maikaʻi. Ma o ka hana o ka wela kiʻekiʻe, ua hoʻonohonoho hou ʻia nā ʻātoma kalapona e hana i kahi ʻano hexagonal lattice layer me ke kiʻekiʻe kiʻekiʻe o ka orientation, pēlā e hoʻomaikaʻi nui ai i ka conductivity uila a me ka wela a me ka ikaika mechanical o ka mea.
Nā hiʻohiʻona: ʻO ka huahana graphitized he ʻano graphite crystalline kiʻekiʻe, e hāʻawi ana i ka conductivity uila a me ka wela, a me ka ikaika kikoʻī kiʻekiʻe a me ka modulus kikoʻī. No ka laʻana, high-moduluskalapona kalaponaloaʻa ʻia ma o kahi kiʻekiʻe o ka graphitization.
Nā ʻanuʻu kikoʻī a me nā pono hana no ka pre-oxidation, carbonization a me graphitization:
Pre-oxidation: lawe ʻia i ka ea ma kahi mahana i hoʻomalu ʻia o 200-300 ° C. Pono e hoʻopili ʻia ka ʻāʻī e hōʻemi i ka emi ʻana o ka fiber.
Carbonization: lawe ʻia i loko o kahi lewa inert me ka piʻi mālie o ka mahana i 1000-2000 ° C.
Graphitization: lawe ʻia ma nā mahana kiʻekiʻe (2000-3000°C), maʻamau i loko o kahi ʻūhā a i ʻole i ka lewa inert.
Ka manawa hoʻouna: Mei-22-2025
