ʻO Polytetrafluoroethylene (polytetrafluoroethylene) paha ka fluoropolymer i hoʻohana nui ʻia no ka mea he nui kona mau hiʻohiʻona e hoʻolilo iā ia i mea kūpono no ka nui o nā noi.ʻOi aku ka maʻalahi ma mua o nā paipu like ʻole a hiki ke pale aku i nā mea kemika ʻoihana āpau
ʻO ka pae wela ma kahi o -330°F a 500°F, e hāʻawi ana i ka laulā wela loa ma waena o nā fluoropolymers.Eia kekahi, loaʻa iā ia nā waiwai uila maikaʻi a me ka haʻahaʻa magnetic permeability.ʻO ka paipu Ptfe ka mea hoʻohana nui ʻia i nā paipu ʻoihana a me nā noi kahi e pono ai ke kūpaʻa a me ka maʻemaʻe.PTFEhe haʻahaʻa haʻahaʻa loa o ka friction a ʻo ia kekahi o nā mea "pahee" loa i ʻike ʻia
Nā hiʻohiʻona:
100% maʻemaʻe PTFE resin
Hoʻohālikelike ʻia me FEP, PFA, HP PFA, UHP PFA, ETFE, ECTFE, nā paipu fluoropolymer maʻalahi loa.
Kemika inert, kū'ē kokoke i nā kemika ʻoihana a me nā mea hoʻoheheʻe
Laulā wela ākea
Ke komo haʻahaʻa
ʻO ka pau ʻana o ka ʻili paʻa ʻole
ʻO ka helu haʻahaʻa haʻahaʻa
Hana uila maikaʻi loa
Pahu ʻole
ʻAʻohe mea ʻawaʻawa
Nā noi:
hale hoʻokolohua
Kaʻina hana kemika
ʻIkepili a me nā lako hana
Ka nānā ʻana i ka hoʻokuʻu ʻana
Haʻahaʻa wela
kiʻekiʻe wela
Uila
ozone
ʻO ke ʻano o nā molekala PTFE
Hana ʻia ka Polytetrafluoroethylene (PTFE) e ka polymerization o nā molekole tetrafluoroethylene he nui.
ʻAʻole hōʻike kēia kiʻi PTFE maʻalahi i ke ʻano ʻekolu-dimensional o ka mole.I loko o ka poly molecular ma'alahi (ethylene), ua ho'opili 'ia ka iwi kuamo'o kalapona o ka mole e nā 'ātoma hydrogen wale nō, a ua ma'alahi loa kēia kaulahao- 'a'ole ia he mole laina.
Eia nō naʻe, i ka polytetrafluoroethylene, ua lawa ka nui o ka fluorine atom i loko o kahi hui CF2 e hoʻopilikia i ka fluorine atom ma ka hui pili.Pono ʻoe e hoʻomanaʻo i kēlā me kēia ʻātoma fluorine he 3 mau pālua o nā electrons lone e kū mai ana
ʻO ka hopena o kēia ka hoʻopaʻa ʻana i ka hoʻololi ʻana o ka paʻa kalapona-carbon hoʻokahi.Hoʻonohonoho ʻia nā ʻātoma fluorine i kahi mamao loa mai nā ʻātoma fluorine pili.Hoʻopili ʻia ka hoʻololi ʻana i nā hui kūʻokoʻa ma waena o nā ʻātoma fluorine ma nā ʻātoma kalapona e pili ana-ʻo ia ka mea e hoʻopōmaikaʻi ʻole ai ka hoʻololi ʻana.
Hoʻopaʻa ka mana hoʻopaneʻe i ka mole i ke ʻano koʻokoʻo, a ua hoʻonohonoho ʻia nā ʻātoma fluorine i loko o kahi puʻupuʻu mālie loa - ua hoʻonohonoho ʻia nā ʻātoma fluorine ma kahi ʻāpana a puni ka iwi kuamoʻo.E ʻoki ʻia kēia mau ʻāpana kepau e like me nā penikala lōʻihi a lahilahi i loko o kahi pahu
He mana koʻikoʻi kēia hoʻonohonoho pili pili i nā pūʻali intermolecular, e like me kāu e ʻike ai
ʻO nā ikaika Intermolecular a me ka helu heheʻe o PTFE
ʻO ka helu hoʻoheheʻe o polytetrafluoroethylene ua ʻōlelo ʻia ʻo 327°C.He kiʻekiʻe loa kēia no kēia polymer, no laila pono e nui nā mana van der Waals ma waena o nā mole
No ke aha i ʻōlelo ai nā kānaka he nāwaliwali nā pūʻali van der Waals ma PTFE?
Hoʻokumu ʻia ka ikaika dispersion van der Waals e nā dipoles fluctuating manawa i hana ʻia i ka wā e neʻe ai nā electrons i loko o ka mole.Ma muli o ka nui o ka molela PTFE, e manaʻo ʻoe i kahi ikaika dispersion nui no ka mea he nui nā electrons hiki ke neʻe.
ʻO ke kūlana maʻamau, ʻoi aku ka nui o ka mole, ʻoi aku ka nui o ka mana hoʻopuehu
Eia naʻe, pilikia ka PTFE.He electronegative loa ka Fluorine.Hoʻopili paʻa ia i nā electrons i loko o ka paʻa carbon-fluorine, no laila ʻaʻole hiki i nā electrons ke neʻe e like me kou manaʻo.Hōʻike mākou i ka paʻa kalapona-fluorine me ka loaʻa ʻole o ka polarization ikaika
ʻO nā pūʻali Van der Waals pū kekahi me nā pilina dipole-dipole.Akā i loko o ka polytetrafluoroethylene (PTFE), ua hoʻopuni ʻia kēlā me kēia mole e kahi papa o nā ʻātoma fluorine i hoʻopiʻi maikaʻi ʻia.I kēia hihia, ʻo ka launa pū ʻana wale nō ma waena o nā molekala ʻo ia ka hoʻokuke ʻana!
No laila ua ʻoi aku ka nāwaliwali o ka puʻu ʻana ma mua o kou manaʻo, a ʻo ka pilina dipole-dipole ka mea e hoʻohuli ai.ʻAʻohe mea kupanaha e ʻōlelo ka poʻe he nāwaliwali loa ka ikaika van der Waals ma PTFE.ʻAʻole e loaʻa iā ʻoe ka ikaika hoʻopaʻapaʻa, no ka mea, ʻoi aku ka nui o ka mana o ka dispersion force ma mua o ka pilina dipole-dipole, akā ʻo ka hopena ʻupena e nāwaliwali ka ikaika van der Waals.
Akā, he kiʻekiʻe loa ka helu heheʻe o ka PTFE, no laila e ikaika loa ka ikaika e hoʻopaʻa ai i nā molekala
Pehea e loaʻa ai i ka PTFE kahi helu heheʻe kiʻekiʻe?
ʻO ka PTFE he crystalline loa, ma kēiaʻano he wahi nui, aia nā mole i kahi hoʻonohonoho maʻamau.E hoʻomanaʻo, hiki ke noʻonoʻo ʻia nā molekala PTFE e like me nā koʻokoʻo elongated.E hui pū ʻia kēia mau pou
ʻO ia hoʻi, ʻoiai ʻaʻole hiki i ka mole ptfe ke hana i nā dipoles lōʻihi maoli, hiki ke hoʻohana maikaʻi ʻia nā dipoles.
No laila, nāwaliwali a ikaika paha nā pūʻali van der Waals ma PTFE?
Manaʻo wau hiki iā ʻolua ke pololei!Inā hoʻonohonoho ʻia nā kaulahao polytetrafluoroethylene (PTFE) ma ke ʻano ʻaʻole pili loa ma waena o nā kaulahao, e nāwaliwali loa ka ikaika ma waena o lākou a e haʻahaʻa loa ka helu heheʻe.
Akā ma ke ao maoli, pili pili nā molekala.ʻAʻole ʻoi aku ka ikaika o nā pūʻali Van der Waals, akā ʻo ke ʻano o ka PTFE ke manaʻo nei lākou i ka hopena nui loa, e hana ana i nā paʻa intermolecular ikaika holoʻokoʻa a me nā wahi heheʻe kiʻekiʻe.
He ʻokoʻa kēia me nā ikaika ʻē aʻe, e like me ka ikaika pānaʻi dipole-dipole, i hoʻemi ʻia e 23 mau manawa, a i ʻole ʻelua hoʻemi ʻia ka mamao e 8 mau manawa.
No laila, ʻo ka hoʻopili paʻa ʻana o nā molekala koʻokoʻo i loko o ka PTFE e hoʻonui i ka pono o ka hoʻopuehu
Nā waiwai lāʻau ʻole
ʻO kēia ke kumu e paʻa ʻole ai ka wai a me ka ʻaila i ka ʻili o ka PTFE, a no ke aha e hiki ai iā ʻoe ke palai i nā hua i loko o ka pā PTFE-coated me ka ʻole o ka pipili ʻana i ka pā.
Pono ʻoe e noʻonoʻo i nā mana e hoʻoponopono ai i nā molekala ʻē aʻe ma luna o ka ʻiliPTFE.Hiki ke komo i kekahi ʻano paʻa kemika, ka ikaika van der Waals a i ʻole ka paʻa hydrogen
ʻO ka hoʻopaʻa kino
He ikaika loa ka paʻa kalapona-fluorine, a ʻaʻole hiki i nā molekala ʻē aʻe ke hiki i ke kaulahao kalapona e hoʻokō ai i kekahi pane hoʻololi.ʻAʻole hiki ke loaʻa kahi paʻa kemika
nā pūʻali van der Waals
Ua ʻike mākou ʻaʻole ikaika loa ka ikaika o ka van der Waals ma PTFE, a e hoʻoheheʻe wale ʻia ka PTFE, no ka mea, ua kokoke loa nā molekala i loaʻa iā lākou ka pilina maikaʻi loa.
Akā, ʻokoʻa ia no nā molekala ʻē aʻe kokoke i ka ʻili o PTFE.ʻO nā molekala liʻiliʻi liʻiliʻi (e like me nā molekele wai a i ʻole nā molekole aila) e loaʻa ka liʻiliʻi o ka pili ʻana me ka ʻili, a he liʻiliʻi wale nō ka mea hoʻohiwahiwa van der Waals.
ʻAʻole ʻano ʻano koʻokoʻo kahi mole nui (e like me ka protein), no laila ʻaʻole lawa ka pili pono ma waena o ia a me ka ʻili e lanakila ai i ka manaʻo polarization haʻahaʻa o PTFE.
ʻO kēlā me kēia ʻaoʻao, ʻo ka ikaika van der Waals ma waena o ka ʻili o ka PTFE a me nā mea a puni he liʻiliʻi a ʻaʻole pono.
Nā paʻa hydrogen
Hoʻopili piha ʻia nā molekala PTFE ma ka ʻili e nā ʻātoma fluorine.He electronegative loa kēia mau ʻātoma fluorine, no laila ke lawe nei lākou a pau i kahi degere o ka hoʻopiʻi maikaʻi ʻole.Loaʻa i kēlā me kēia fluorine he 3 mau pālua o nā electron lone protruding
ʻO kēia nā kūlana i koi ʻia no ka hoʻokumu ʻana i nā paʻa hydrogen, e like me ka lua lone ma ka fluorine a me ka hydrogen atom i ka wai.Akā ʻaʻole maopopo kēia e hiki mai, inā ʻaʻole e loaʻa ka manaʻo ikaika ma waena o nā molekala PTFE a me nā molekele wai, a paʻa ka wai i ka PTFE.
Hōʻuluʻulu manaʻo
ʻAʻohe ala maikaʻi no nā molekala ʻē aʻe e hoʻopili pono ai i ka ʻili o PTFE, no laila he ʻili lāʻau ʻole.
ʻO ka haʻahaʻa haʻahaʻa
He haʻahaʻa loa ka coefficient o friction o PTFE.ʻO ia hoʻi inā he ʻili kou i uhi ʻia me ka ptfe, e paheʻe maʻalahi nā mea ʻē aʻe ma luna.
Aia ma lalo kahi hōʻuluʻulu wikiwiki o nā mea e hana nei.Loaʻa kēia mai kahi pepa 1992 i kapa ʻia "Friction and Wear of Polytetrafluoroethylene".
I ka hoʻomaka ʻana o ka hoʻoheheʻe ʻana, haki ka ʻili o ka PTFE a hoʻoneʻe ʻia ka nuipa i nā wahi a pau e heʻe ana.'O ia ho'i, e komo ka ili PTFE.
I ka hoʻomau ʻana o ka paheʻe ʻana, ua wehe ʻia nā poloka i loko o nā kiʻiʻoniʻoni lahilahi.
I ka manawa like, huki ʻia ka ʻili o ka PTFE e hana i kahi papa hoʻonohonoho.
Loaʻa nā molekele PTFE i hoʻonohonoho maikaʻi ʻia i nā ʻaoʻao ʻelua i hiki ke paheʻe ma luna o kekahi
ʻO ka mea i luna nei ka hoʻokomo ʻana o polytetrafluoroethylene, hiki ke hana ʻia ka polytetrafluoroethylene i nā ʻano huahana like ʻole, ua loea mākou i ka hana ʻana i ka ptfe tube、nā mea hana hose ptfe, Welina mai e kamaʻilio me mākou
Huli e pili ana i ka ptfe hose:
Ka manawa hoʻouna: Mei-05-2021