Imidiya ye-PTFEidla ngokubhekisa kwi-media eyenziwe nge-polytetrafluoroethylene (i-PTFE ngamafutshane). Oku kulandelayo yintshayelelo eneenkcukacha kwi-PTFE media:
Ⅰ. Iimpawu zezinto ezibonakalayo
1. Uzinzo lwekhemikhali
I-PTFE yinto ezinzileyo kakhulu. Inokumelana okukhulu kweekhemikhali kwaye ayisebenzi phantse kuzo zonke iikhemikhali. Umzekelo, kwindawo ene-asidi ezinamandla (ezifana ne-sulfuric acid, i-nitric acid, njl.njl.), iziseko ezinamandla (ezifana ne-sodium hydroxide, njl.njl.) kunye nezinyibilikisi ezininzi ze-organic (ezifana ne-benzene, i-toluene, njl.njl.), izinto ze-PTFE aziyi kusabela ngokweekhemikhali. Oku kuyenza ithandwe kakhulu kwizicelo ezifana nezitywino kunye nee-linings zepayipi kwimizi-mveliso yeekhemikhali kunye namayeza, kuba la mashishini adla ngokufuna ukujongana neekhemikhali ezahlukeneyo ezintsonkothileyo.
2. Ukumelana nobushushu
I-PTFE media inokugcina ukusebenza kwayo kumanqanaba obushushu abanzi. Ingasebenza ngokuqhelekileyo kumanqanaba obushushu ukusuka kwi -200℃ ukuya kwi-260℃. Kumaqondo obushushu aphantsi, ayizukuba buthathaka; kumazinga obushushu aphezulu, ayizukubola okanye iguqulwe ngokulula njengeeplastiki eziqhelekileyo. Olu xinzelelo lulungileyo kubushushu lwenza ukuba i-PTFE media ibe nokusetyenziswa okubalulekileyo kwi-aerospace, kwi-elektroniki nakwezinye iindawo. Umzekelo, kwinkqubo ye-hydraulic yenqwelo-moya, i-PTFE media inokumelana nobushushu obuphezulu obuveliswa kukutshintsha kobushushu obuphakathi kunye nokusebenza kwenkqubo ngexesha lokubhabha.
3.I-coefficient yokungqubana okuphantsi
I-PTFE ine-coefficient ephantsi kakhulu yokungqubana, enye yezona zinto ziphantsi kakhulu phakathi kwezinto eziqinileyo ezaziwayo. Ii-coefficients zayo zokungqubana eziguqukayo nezingaguqukiyo zombini zincinci kakhulu, malunga ne-0.04. Oku kwenza i-PTFE dielectric isebenze kakuhle xa isetyenziswa njenge-lubricant kwiindawo zoomatshini. Umzekelo, kwezinye izixhobo zokuhambisa izixhobo, iibheringi okanye ii-bushings ezenziwe nge-PTFE zinokunciphisa ukungqubana phakathi kweendawo zoomatshini, zinciphise ukusetyenziswa kwamandla, kwaye zandise ubomi benkonzo yezixhobo.
4. Ubushushu bombane
I-PTFE ineempawu ezilungileyo zokuthintela ubushushu bombane. Igcina ukumelana okuphezulu kokuthintela ubushushu kuluhlu olubanzi lwamaza. Kwizixhobo ze-elektroniki, i-PTFE dielectric ingasetyenziselwa ukwenza izinto zokuthintela ubushushu, ezifana nomaleko wokuthintela ubushushu weentambo kunye neentambo. Ingathintela ukuvuza kwamandla ombane, iqinisekise ukusebenza okuqhelekileyo kwezixhobo ze-elektroniki, kwaye imelane nokuphazamiseka kwe-electromagnetic yangaphandle.
Umzekelo, kwiintambo zonxibelelwano ezikhawulezayo, umaleko we-PTFE insulation unokuqinisekisa uzinzo kunye nokuchaneka kokudluliselwa kwesignali.
5. Ukunganamatheli
Umphezulu we-PTFE dielectric awunamatheli kakhulu. Oku kungenxa yokuba i-electronegativity yee-athomu ze-fluorine kwisakhiwo se-molecular ye-PTFE iphezulu kakhulu, nto leyo eyenza kube nzima ukuba umphezulu we-PTFE udibane neekhemikhali nezinye izinto. Oku kunganamatheli kwenza i-PTFE isetyenziswe kakhulu kwiingubo zezixhobo zokupheka (ezifana neepani ezinganamatheliyo). Xa ukutya kuphekwe kwipani enganamatheliyo, akuyi kunamathela lula eludongeni lwepani, nto leyo eyenza kube lula ukuyicoca kwaye kunciphisa inani legrisi esetyenziswayo ngexesha lokupheka.
Yintoni umahluko phakathi kwePVDF kunye nePTFE?
I-PVDF (i-polyvinylidene fluoride) kunye ne-PTFE (i-polytetrafluoroethylene) zombini zii-polymers ezine-fluorinated ezineempawu ezininzi ezifanayo, kodwa zikwanomahluko obalulekileyo kwisakhiwo seekhemikhali, ukusebenza kunye nokusetyenziswa kwazo. Nazi umahluko wazo ophambili:
Ⅰ. Ulwakhiwo lweekhemikhali
I-PVDF:
Ulwakhiwo lwekhemikhali yi-CH2−CF2n, eyi-polymer eyi-semi-crystalline.
Ikhonkco le-molecular liqulethe iiyunithi ze-methylene (-CH2-) kunye ne-trifluoromethyl (-CF2-) ezitshintshanayo.
I-PTFE:
Ulwakhiwo lwekhemikhali yi-CF2−CF2n, eyi-perfluoropolymer.
Ikhonkco lemolekyuli lenziwe ngokupheleleyo ziiathom zefluorine kunye neeathom zekhabhoni, ngaphandle kweeathom zehydrogen.
Ⅱ. Uthelekiso lwentsebenzo
| Isalathisi sokuSebenza | I-PVDF | I-PTFE |
| Ukumelana neekhemikhali | Ukumelana kakuhle kweekhemikhali, kodwa akukuhle njenge-PTFE. Ukumelana okuhle kwiiasidi ezininzi, iibase kunye nezinyibilikisi zendalo, kodwa ukumelana kakubi neebase ezinamandla kumaqondo obushushu aphezulu. | Ayisebenzi phantse kuzo zonke iikhemikhali, iyakwazi ukumelana neekhemikhali kakhulu. |
| Ukumelana nobushushu | Uluhlu lobushushu bokusebenza yi -40℃～150℃, kwaye ukusebenza kuya kuncipha xa amaqondo obushushu ephezulu. | Uluhlu lobushushu bokusebenza yi -200℃ ～260℃, kwaye ukumelana nobushushu kugqibelele. |
| Amandla oomatshini | Amandla oomatshini aphezulu, anokuqina okuhle kokutsalwa kunye nokumelana nempembelelo. | Amandla oomatshini aphantsi kakhulu, kodwa anokuguquguquka okuhle kwaye anokumelana nokudinwa. |
| I-coefficient yokungqubana | I-coefficient yokungqubana iphantsi, kodwa iphezulu kune-PTFE. | I-coefficient yokungqubana iphantsi kakhulu, yenye yezona zinto ziphantsi phakathi kwezinto eziqinileyo ezaziwayo. |
| Ubushushu bombane | Ukusebenza kakuhle kokufakwa kombane, kodwa akukuhle njenge-PTFE. | Ukusebenza kobushushu bombane kugqwesile, kufanelekile kwiindawo ezisebenzisa amaza aphezulu kunye ne-voltage ephezulu. |
| Ukunganamatheli | Ukunganamatheli kulungile, kodwa akulunganga njenge-PTFE. | Inamandla kakhulu ukunganamatheli kwaye yeyona nto iphambili kwiingubo zepani ezinganamatheliyo. |
| Ukuqhubekeka | Kulula ukuyicubungula kwaye inokwenziwa ngeendlela eziqhelekileyo ezifana nokubumba ngenaliti kunye nokukhupha. | Kunzima ukuyicubungula kwaye idla ngokufuna iindlela ezikhethekileyo zokucubungula ezifana nokusila. |
| Uxinano | Uxinano lumalunga ne-1.75 g/cm³, olukhaphukhaphu. | Uxinano lumalunga ne-2.15 g/cm³, nto leyo inzima kakhulu. |
Ⅲ. Amasimi esicelo
| Izicelo | I-PVDF | I-PTFE |
| Ishishini leekhemikhali | Isetyenziselwa ukuvelisa iipayipi, iivalvu, iimpompo kunye nezinye izixhobo ezingamelani nokugqwala, ezilungele ngokukodwa ukuphatha iindawo ezine-asidi okanye i-alkaline. | Isetyenziswa kakhulu kwiilinings, kwiiseal, kwiipayipi, njl.njl. zezixhobo zeekhemikhali, ifanelekile kwiindawo ezinobungozi beekhemikhali. |
| Ishishini le-elektroniki | Isetyenziselwa ukwenza izindlu, iileya zokwambathisa, njl.njl. zezinto ze-elektroniki, ezifanelekileyo kwiindawo eziphakathi kunye neendawo ze-voltage. | Isetyenziselwa ukuvelisa iindawo zokukhusela iintambo ezisebenzisa i-frequency ephezulu kunye nezihlanganisi ze-elektroniki, ezifanelekileyo kwiindawo ezisebenzisa i-frequency ephezulu kunye ne-voltage ephezulu. |
| Ishishini loomatshini | Isetyenziselwa ukwenza iindawo zoomatshini, iibheringi, izitywini, njl.njl., ezifanelekileyo kwiindawo ezinomthwalo ophakathi kunye nobushushu obuphakathi. | Isetyenziselwa ukuvelisa iindawo ezingasebenzi kakuhle, izitywini, njl.njl., ezifanelekileyo kwiindawo ezinobushushu obuphezulu kunye neendawo ezingasebenzi kakuhle. |
| Ishishini lokutya kunye namayeza | Isetyenziselwa ukuvelisa izixhobo zokulungisa ukutya, imiphetho yezixhobo zamayeza, njl.njl., ezifanelekileyo kwiindawo ezinobushushu obuphakathi kunye neekhemikhali. | Isetyenziselwa ukwenza izinto zokugquma iipani ezinganamatheliyo, iibhanti zokuhambisa ukutya, ii-linings zezixhobo zamayeza, njl.njl., ezifanelekileyo kwiindawo ezinobushushu obuphezulu kunye neendawo ezinamandla zeekhemikhali. |
| Ishishini lokwakha | Isetyenziselwa ukwenza izinto zokwakha ezingaphandle eludongeni, izinto zokuphahla, njl.njl., ezinokumelana kakuhle nemozulu kunye nobuhle. | Isetyenziselwa ukwenza izinto zokuvala izakhiwo, izinto ezingangeni manzi, njl.njl., ezifanelekileyo kwiindawo ezinobungozi. |
Ⅳ. Ixabiso
I-PVDF: Ixabiso liphantsi kakhulu, ifikeleleka lula.
I-PTFE: Ngenxa yetekhnoloji yayo ekhethekileyo yokucubungula kunye nokusebenza kwayo okugqwesileyo, ixabiso liphezulu.
Ⅴ. Impembelelo yokusingqongileyo
I-PVDF: Inani elincinci leegesi eziyingozi linokukhutshwa xa kushushu kakhulu, kodwa impembelelo iyonke kwindalo esingqongileyo incinci.
I-PTFE: Izinto ezinobungozi ezifana ne-perfluorooctanoic acid (PFOA) zinokukhutshwa kubushushu obuphezulu, kodwa iinkqubo zemveliso zanamhlanje ziye zanciphisa kakhulu lo mngcipheko.
Ixesha leposi: Meyi-09-2025