Imidiya ye-PTFEngokuqhelekileyo ibhekisa kwimidiya eyenziwe nge-polytetrafluoroethylene (PTFE ngokufutshane). Oku kulandelayo yintshayelelo eneenkcukacha kwi-PTFE media:
Ⅰ. Iimpawu zezinto eziphathekayo
1.Uzinzo lweChemical
I-PTFE sisixhobo esizinze kakhulu. Inamandla okumelana neekhemikhali kwaye ayisebenzi phantse kuzo zonke iikhemikhali. Ngokomzekelo, kwindawo yee-acids ezinamandla (ezifana ne-sulfuric acid, i-nitric acid, njl.), iziseko ezinamandla (ezifana ne-sodium hydroxide, njl.) kunye ne-solvents ezininzi ze-organic (ezifana ne-benzene, i-toluene, njl.), izixhobo ze-PTFE aziyi kusabela ngamakhemikhali. Oku kwenza ukuba kudume kakhulu kwizicelo ezifana nezitywina kunye ne-pipe linings kumashishini ekhemikhali kunye namayeza, kuba la mashishini ahlala efuna ukujongana neentlobo zeekhemikhali eziyinkimbinkimbi.
2.Ukumelana nobushushu
Imidiya ye-PTFE inokugcina ukusebenza kwayo kuluhlu olubanzi lobushushu. Inokusebenza ngokuqhelekileyo kuluhlu lobushushu obuphakathi -200℃ ukuya kuma-260℃. Kwiqondo lokushisa eliphantsi, aliyi kuba brittle; kumaqondo obushushu aphezulu, ayisayi kubola okanye ibole ngokulula njengezinye iiplastiki eziqhelekileyo. Oku kuxhathisa iqondo lobushushu elungileyo kwenza PTFE eendaba kufuneka usebenziso olubalulekileyo kwi-aerospace, elektroniki kunye nezinye iinkalo. Ngokomzekelo, kwinkqubo ye-hydraulic ye-aircraft, i-PTFE media inokumelana nobushushu obuphezulu obuveliswa lutshintsho lweqondo lokushisa kunye nokusebenza kwenkqubo ngexesha lokuhamba.
3.I-coefficient ephantsi ye-friction
I-PTFE ine-coefficient yokhuhlane ephantsi kakhulu, enye yezona zinto zisezantsi phakathi kwemathiriyeli eqinileyo eyaziwayo. I-coefficients yayo eguquguqukayo kunye ne-static friction zombini incinci kakhulu, malunga ne-0.04. Oku kwenza i-PTFE dielectric isebenze kakhulu xa isetyenziswa njenge-lubricant kwiindawo zoomatshini. Umzekelo, kwezinye izixhobo zothumelo lomatshini, iibheringi okanye iibhutsi ezenziwe nge-PTFE zinokunciphisa ukungqubana phakathi kwamalungu oomatshini, ukunciphisa ukusetyenziswa kwamandla, kunye nokwandisa ubomi benkonzo yesixhobo.
4.Ukugqunywa kombane
I-PTFE ineempawu ezilungileyo zokugquma umbane. Igcina ukuxhathisa okuphezulu kokugquma kuluhlu olubanzi lwamaza. Kwizixhobo zombane, i-PTFE dielectric ingasetyenziselwa ukwenza imathiriyeli yokugquma, njengomaleko wokugquma weingcingo kunye neentambo. Inokuthintela ukuvuza kwangoku, iqinisekise ukusebenza okuqhelekileyo kwezixhobo zombane, kwaye ixhathise uphazamiseko lwangaphandle lombane.
Ngokomzekelo, kwiintambo zonxibelelwano olukhawulezayo, i-PTFE insulation layer inokuqinisekisa ukuzinza kunye nokuchaneka kokuhanjiswa kwesignali.
5.Ukungancamatheli
Umphezulu we-PTFE dielectric unokuqina okungabambekiyo. Oku kungenxa yokuba i-electronegativity yeeathom zefluorine kwisakhiwo semolekyuli ye-PTFE iphezulu kakhulu, isenza kube nzima kumphezulu we-PTFE ukuba udibane ngokwekhemikhali nezinye izinto. Oku kungancamatheli kwenza i-PTFE isetyenziswe ngokubanzi kwiingubo zokupheka kwizinto zokupheka (ezifana neepani ezingezizo). Xa ukutya kuphekwe kwi-pan engapheliyo, akuyi kubambelela lula eludongeni lwe-pan, okwenza kube lula ukucoca kunye nokunciphisa inani legrisi elisetyenziswe ngexesha lokupheka.
Yintoni umahluko phakathi kwe-PVDF kunye ne-PTFE?
I-PVDF (i-polyvinylidene fluoride) kunye ne-PTFE (i-polytetrafluoroethylene) zombini i-polymers e-fluorinated kunye neempawu ezininzi ezifanayo, kodwa zikwanazo umahluko omkhulu kwisakhiwo sekhemikhali, ukusebenza kunye nokusetyenziswa. Oku kulandelayo ngowona mahluko aphambili:
Ⅰ. Ubume beMichiza
PVDF:
Ubume bekhemikhali yi-CH2−CF2n, eyi-semi-crystalline polymer.
Ikhonkco yemolekyuli iqulethe i-alternating methylene (-CH2-) kunye ne-trifluoromethyl (-CF2-) iiyunithi.
I-PTFE:
Ubume bekhemikhali yi-CF2−CF2n, eyi-perfluoropolymer.
Itsheyini yemolekyuli yenziwe ngokupheleleyo ngeeathom zefluorine kunye neeathom zekhabhoni, ngaphandle kweeathom zehydrogen.
Ⅱ. Ukuthelekisa ukusebenza
| Isalathiso sokuSebenza | PVDF | PTFE |
| Ukumelana nemichiza | Ukumelana neekhemikhali ezilungileyo, kodwa akulunganga njenge-PTFE. Ukuchasana okulungileyo kwii-asidi ezininzi, iziseko kunye nezinyibilikisi zezinto eziphilayo, kodwa ukuchasana okungahambi kakuhle kwiziseko eziqinileyo kumaqondo aphezulu. | Ingangeni phantse kuzo zonke iikhemikhali, zixhathisa kakhulu kwikhemikhali. |
| Ukumelana nobushushu | Uluhlu lweqondo lokushisa lokusebenza -40℃～150℃, kwaye ukusebenza kuya kuncipha kumaqondo aphezulu. | Uluhlu lweqondo lokushisa olusebenzayo luyi-200℃～260℃, kwaye ukumelana nobushushu kuhle kakhulu. |
| Amandla omatshini | Amandla omatshini aphakamileyo, anamandla afanelekileyo okuqina kunye nokuchasana kwempembelelo. | Amandla omatshini aphantsi, kodwa anokuguquguquka okuhle kunye nokumelana nokudinwa. |
| I-coefficient yefriction | I-coefficient yefriction iphantsi, kodwa ingaphezulu kune-PTFE. | I-friction coefficient iphantsi kakhulu, enye yezona zisezantsi phakathi kwezinto eziqinileyo ezaziwayo. |
| Ukugquma kombane | Ukusebenza kokufakelwa kombane kulungile, kodwa akulunganga njenge-PTFE. | Ukusebenza kwe-insulation yombane kugqwesileyo, kufanelekile kumaza omoya aphezulu kunye neendawo zombane eziphezulu. |
| Ukungancamatheli | Ukungancamatheli kulungile, kodwa akulunganga njenge-PTFE. | Inokuqina ngokugqithisileyo kokungancamatheli kwaye yeyona nto iphambili kwizinto zokugquma ngepani. |
| Ukuqhubekeka | Kulula ukusetyenzwa kwaye inokusekwa ngeendlela eziqhelekileyo ezifana nokubumba inaliti kunye ne-extrusion. | Kunzima ukusetyenzwa kwaye ngokuqhelekileyo kufuna iindlela zokucwangcisa ezikhethekileyo ezifana ne-sintering. |
| Ukuxinana | Uxinaniso lumalunga ne-1.75 g/cm³, olulula noko. | Uxinaniso lumalunga ne-2.15 g/cm³, olunzima noko. |
Ⅲ. Iinkalo zesicelo
| Usetyenziso | PVDF | PTFE |
| Ishishini lemichiza | Isetyenziselwa ukwenza imibhobho enganyangekiyo kukutya, iivalvu, iimpompo kunye nezinye izixhobo, ingakumbi ezilungele ukuphatha iindawo ezineasidi okanye ialkaline. | Isetyenziswe ngokubanzi kwi-linings, i-seal, imibhobho, njl.njl izixhobo zekhemikhali, ezifanelekileyo kwimichiza eyingozi kakhulu. |
| Ishishini le-elektroniki | Isetyenziselwa ukwenza izindlu, iileya zokugquma, njl. njl | Isetyenziselwa ukwenza iindawo ezikhuselayo zeentambo ezisebenza rhoqo kunye neziqhagamshelo zombane, ezifanelekileyo kumaza omoya aphezulu kunye neemeko zombane ophezulu. |
| Ishishini loomatshini | Isetyenziselwa ukwenza iinxalenye zomatshini, iibheringi, izitywina, njl., zilungele umthwalo ophakathi kunye neendawo zokushisa. | Isetyenziselwa ukuvelisa iindawo eziphantsi kwe-friction, izitywina, njl., ezifanelekileyo kwiqondo lokushisa eliphezulu kunye neendawo eziphantsi zokukhuhla. |
| Ishishini lokutya kunye namayeza | Isetyenziselwa ukwenza iinxalenye zezixhobo zokulungisa ukutya, ii-linings zezixhobo zamayeza, njl., zilungele ubushushu obuphakathi kunye nemekobume yeekhemikhali. | Isetyenziselwa ukuvelisa i-pan non-stick coatings, amabhanti okuhambisa ukutya, ii-linings zezixhobo zonyango, njl., zilungele ukushisa okuphezulu kunye neendawo eziqinileyo zeekhemikhali. |
| Ishishini lokwakha | Isetyenziselwa ukwenza izinto zokwakha zangaphandle zodonga, izinto zokuphahla, njl., kunye nokumelana nemozulu elungileyo kunye nobuhle. | Isetyenziselwa ukwenza izinto zokutywina zokwakha, izinto ezingangeni manzi, njl., zilungele indawo ezingqongileyo. |
Ⅳ. Iindleko
I-PVDF: Ixabiso eliphantsi ngokwentelekiso, elifikelelekayo.
I-PTFE: Ngenxa yobuchwephesha obukhethekileyo bokucwangcisa kunye nokusebenza okugqwesileyo, ixabiso liphezulu.
Ⅴ. Impembelelo yokusingqongileyo
I-PVDF: Umlinganiselo omncinci weegesi ezinobungozi unokukhutshwa kumaqondo obushushu aphezulu, kodwa impembelelo yokusingqongileyo iyonke incinci.
I-PTFE: Izinto ezinobungozi ezifana ne-perfluorooctanoic acid (PFOA) zinokukhutshwa kumaqondo obushushu aphezulu, kodwa iinkqubo zanamhlanje zokuvelisa ziye zawunciphisa kakhulu lo mngcipheko.
Ixesha lokuposa: May-09-2025