Ko te Polytetrafluoroethylene (polytetrafluoroethylene) pea te fluoropolymer e whakamahia whānuitia ana nā te mea he maha ōna āhuatanga e pai ai mō te whānuitanga o ngā mahi. He ngāwari ake i ētahi atu paipa rite, ā, ka taea te ātete ki te nuinga o ngā matū ahumahi.
Ko te awhe pāmahana kei waenganui i te -330°F ki te 500°F, koinei te awhe pāmahana whānui rawa atu i roto i ngā fluoropolymers. Hei tāpiri, he tino pai ōna āhuatanga hiko, ā, he iti te uruhanga aukume. Ko ngā ngongo Ptfe te ngongo taiwhanga e whakamahia whānuitia ana, me ngā tono hoki e hiahiatia ana te ātete matū me te parakore.PTFEhe tino iti te tauwehenga o te waku, ā, ko tētahi o ngā matū "paheke" e mōhiotia ana
Ngā Āhuatanga:
100% kapia PTFE parakore
Ki te whakataurite ki te FEP, PFA, HP PFA, UHP PFA, ETFE, ECTFE, ngā paipa fluoropolymer tino ngāwari
Kāore e ngoikore te matū, ātete ki te nuinga o ngā matū ahumahi me ngā whakarewa
Awhe pāmahana whānui
Te iti o te urunga
He mata maeneene, kāore e piri
Te tauwehenga waku iti rawa
He tino pai te mahi hiko
Kāore e mura
Kāore i te paitini
Ngā tono:
taiwhanga
Tukanga matū
Ngā taputapu tātari me te tukatuka
Te aroturuki i ngā tukunga
Te pāmahana iti
pāmahana teitei
Hiko
ozone
Te hanganga o ngā ngota PTFE
Ka hangaia te Polytetrafluoroethylene (PTFE) mā te whakapūhuitanga o te maha o ngā ngota tetrafluoroethylene.
Kāore tēnei hoahoa PTFE māmā e whakaatu ana i te hanganga toru-ahu o te ngota. I roto i te poly(ethylene ngota māmā ake), ko te tuara waro o te ngota e honoa ana e ngā ngota hauwai anake, ā, he tino ngāwari tēnei mekameka - ehara i te mea he ngota raina.
Heoi, i roto i te polytetrafluoroethylene, he nui te ngota fluorine i roto i te rōpū CF2 hei whakararuraru i te ngota fluorine i te rōpū tata. Me mahara koe e toru ngā takirua irahiko takitahi o ia ngota fluorine e piri ana ki waho.
Ko te pānga o tēnei he pehi i te hurihanga o te here kotahi o te waro-waro. Ko te whakaritenga o ngā ngota fluorine kia tawhiti rawa atu i ngā ngota fluorine e tata ana. Ko te hurihanga he tikanga kia uru atu ngā tukinga takirua-takitahi i waenga i ngā ngota fluorine i runga i ngā ngota waro e tata ana - ā, ka kore e pai te hurihanga.
Mā te kaha pana ka mau te ngota ngota ki te āhua tokotoko, ā, ka whakaritea ngā ngota fluorine ki roto i te porowhita tino ngawari—ka whakaritea ngā ngota fluorine ki roto i te porowhita huri noa i te tuara waro. Ka pēhia ngātahi ēnei rīpene mata pērā i ngā pene roa, angiangi i roto i te pouaka.
He pānga nui tō tēnei whakaritenga whakapā tata ki ngā kaha i waenga i ngā ngota ngota, ka kite koe
Ngā kaha ā-iwi me te pūwāhi rewa o te PTFE
Ko te ira rewa o te polytetrafluoroethylene e kīia ana ko te 327°C. He tino teitei tēnei mō tēnei pūhui, nō reira me nui ngā kaha van der Waals i waenganui i ngā ngota.
He aha te take e kī ai te tangata he ngoikore ngā kaha van der Waals i roto i te PTFE?
Ko te kaha marara o van der Waals ka puta mai i ngā dipoles rangitahi e puta ana i te wa e neke haere ana ngā irahiko i roto i te ngota. Nā te mea he nui te ngota PTFE, ka tumanakohia he kaha marara nui nā te mea he maha ngā irahiko ka taea te neke.
Ko te āhuatanga whānui, ko te nui ake o te ngota ngota, ko te nui ake o te mana marara
Heoi, he raruraru tō te PTFE. He tino irahiko kore te fluorine. Ka herea pūmautia ngā irahiko i roto i te hononga waro-fluorine, kia tino pūmau, ā, kāore e taea e ngā irahiko te neke pērā i tō whakaaro. E whakaahuahia ana e mātou te hononga waro-fluorine kāore i te kaha te porowhita.
Kei roto hoki i ngā kaha o Van der Waals ngā taunekeneke dipole-dipole. Engari i roto i te polytetrafluoroethylene (PTFE), ka karapotia ia ngota e tētahi paparanga o ngā ngota fluorine he iti te utu kino. I tēnei wā, ko te taunekeneke anake i waenga i ngā ngota ko te whakahē tahi!
Nō reira, he ngoikore ake te kaha marara i tō whakaaro, ā, ka puta te pana i te taunekeneke dipole-dipole. Kāore he mea miharo ka kīia e te tangata he tino ngoikore te kaha van der Waals i roto i te PTFE. Kāore koe e whiwhi i te kaha pana, nā te mea he nui ake te awe o te kaha marara i te taunekeneke dipole-dipole, engari ko te hua whānui ko te kaha van der Waals ka ngoikore haere.
Engari he tino teitei te ira rewa o te PTFE, nō reira me tino kaha te kaha e pupuri ana i ngā ngota ngota.
Me pēhea te nui o te ira rewa o te PTFE?
He tino tioata te PTFE, nō reira he whānui te horahanga, he tino rite te whakaritenga o ngā ngota. Kia maumahara, ka taea te whakaaro ko ngā ngota PTFE he tokotoko roa. Ka piri tata ēnei pou ki a rātou anō.
Ko te tikanga o tēnei, ahakoa kāore e taea e te ngota ptfe te whakaputa i ngā dipole rangitahi nui, ka taea te whakamahi i ngā dipole me te tino whai hua.
Nō reira, he ngoikore, he kaha rānei ngā kaha van der Waals i roto i te PTFE?
Ki taku whakaaro he tika ā kōrua! Mēnā ka whakaritea ngā mekameka polytetrafluoroethylene (PTFE) kia kore ai e tino tata te hononga i waenga i ngā mekameka, ka ngoikore rawa te kaha i waenganui i a rāua, ā, ka iti rawa te ira rewa.
Engari i te ao tūturu, kei te tata te hononga o ngā ngota. Ahakoa kāore pea i te tino kaha ngā kaha o Van der Waals, ko te hanganga o te PTFE te tikanga ka tino pāngia rātou, ka puta he hononga kaha i waenga i ngā ngota me ngā ira rewa teitei.
He rerekē tēnei ki ētahi atu kaha, pērā i te kaha taunekeneke dipole-dipole, e 23 noa iho ngā wā ka whakaitihia, e rua rānei ngā wā ka whakaitihia te tawhiti e 8 ngā wā.
Nō reira, ko te tākai piri o ngā ngota āhua-tokotoko i roto i te PTFE ka whakanui ake i te whai huatanga o te mararatanga.
Ngā āhuatanga kore-piri
Koia te take kāore te wai me te hinu e piri ki te mata o te PTFE, ā, he aha hoki ka taea ai te parai i ngā hua manu i roto i te paraharaha kua pania ki te PTFE me te kore e piri ki te paraharaha.
Me whai whakaaro koe ki ngā kaha ka taea te whakau i ētahi atu ngota i runga i te mata oPTFE. Tērā pea kei roto ko tētahi momo hononga matū, te kaha van der Waals, te hononga hauwai rānei.
Te hononga matū
He tino kaha te here o te waro-hauora, ā, e kore e taea e ētahi atu ngota te tae atu ki te mekameka waro hei whakaoho i tētahi tauhohenga whakakapinga. Kāore e taea te puta he here matū.
ngā ope a van der Waals
Kua kite tātou kāore te kaha van der Waals i roto i te PTFE i te tino kaha, ā, ka teitei ake te ira rewa o te PTFE, nā te mea he tino tata ngā ngota, ā, he tino whai hua te whakapā atu.
Engari he rerekē tēnei mō ētahi atu ngota e tata ana ki te mata o te PTFE. Ko ngā ngota iti (pērā i ngā ngota wai, i ngā ngota hinu rānei) ka iti noa te pānga ki te mata, ā, ka iti noa te kukume a van der Waals ka puta.
Kāore te ngota nui (pērā i te pūmua) e āhua tokotoko, nō reira kāore e ranea te pānga whai hua i waenganui i a ia me te mata hei whakakore i te ia o te pōraihana iti o te PTFE.
Ahakoa pēhea, he iti noa te kaha van der Waals i waenganui i te mata o te PTFE me ngā mea e karapoti ana, ā, he koretake hoki.
Ngā hononga hauwai
Ko ngā ngota PTFE i runga i te mata kua takaihia katoatia e ngā ngota fluorine. He tino irahiko kore ēnei ngota fluorine, nō reira he taumata utu kino kei a rātou katoa. E toru ngā takirua irahiko takitahi e puta mai ana i ia fluorine.
Koinei ngā āhuatanga e hiahiatia ana mō te hanganga o ngā here hauwai, pērā i te takirua takitahi i runga i te fluorine me te ngota hauwai i roto i te wai. Engari e kore rawa tēnei e tupu, ki te kore ka kaha te kukume i waenga i ngā ngota PTFE me ngā ngota wai, ā, ka piri te wai ki te PTFE.
Whakarāpopototanga
Kāore he huarahi whai hua mō ētahi atu ngota hei piri pai ki te mata o te PTFE, nō reira he mata kore-piri.
Te iti o te waku
He tino iti te tauwehenga waku o te PTFE. Ko te tikanga, ki te mea he mata kua pania ki te ptfe, ka ngawari te paheke o ētahi atu mea ki runga.
Kei raro nei he whakarāpopototanga poto o ngā mea e tupu ana. I ahu mai tēnei i tētahi pepa o te tau 1992 ko "Friction and Wear of Polytetrafluoroethylene" te taitara.
I te tīmatanga o te reti, ka pakaru te mata PTFE, ā, ka nekehia te papatipu ki te wāhi e reti ana. Ko te tikanga o tēnei ka pakaru te mata PTFE.
I te haere tonu o te reti, ka wherahia ngā poraka hei kiriata angiangi.
I taua wā anō, ka kumea te mata o te PTFE ki waho hei hanga i tētahi paparanga kua whakaritea.
Kei ngā mata e rua e pā ana inaianei he pai te whakaritenga o ngā ngota PTFE ka taea te paheke tetahi ki tetahi.
Ko te mea i runga ake nei ko te whakataki o te polytetrafluoroethylene, ka taea te hanga i te polytetrafluoroethylene ki roto i ngā momo hua, he tohunga mātou ki te hanga ngongo ptfe、ngā kaihanga ngongo ptfe, nau mai ki te whakapā mai ki a mātou
Ngā rapunga e pā ana ki te ngongo ptfe:
Wā tuku: Mei-05-2021