Nangona i-PTFE (polytetrafluoroethylene) kunyei-ePTFE(i-polytetrafluoroethylene eyandisiweyo) inesiseko esifanayo seekhemikhali, inomahluko omkhulu kwisakhiwo, ukusebenza kunye neendawo zokusetyenziswa.
Ulwakhiwo lweekhemikhali kunye neempawu ezisisiseko
Zombini i-PTFE kunye ne-ePTFE zenziwe nge-polymer kwi-tetrafluoroethylene monomers, kwaye zombini zinefomyula yeekhemikhali (CF₂-CF₂)ₙ, ezingangenisi khemikhali kakhulu kwaye zimelana nobushushu obuphezulu. I-PTFE yenziwe ngokusila kobushushu obuphezulu, kwaye iitsheyini zeemolekyuli zilungelelaniswe ngokusondeleyo ukwenza isakhiwo esixineneyo, esingenazimbobo. I-ePTFE isebenzisa inkqubo ekhethekileyo yokulula ukwenza i-PTFE i-fiberize kubushushu obuphezulu ukwenza isakhiwo se-mesh esinezimbobo esinezimbobo ezingama-70%-90%.
Uthelekiso lweempawu ezibonakalayo
| Iimbonakalo | I-PTFE | i-ePTFE |
| Uxinano | Phezulu (2.1-2.3 g/cm³) | Phantsi (0.1-1.5 g/cm³) |
| Ukukwazi ukuchacha | Akukho kungena kwamanzi (kuxinene ngokupheleleyo) | Ukungena okuphezulu (ii-micropores zivumela ukusasazeka kwegesi) |
| Ukuguquguquka | Iqinile kwaye ibuthathaka | Ukuguquguquka okuphezulu kunye nokuguquguquka |
| Amandla oomatshini | Amandla aphezulu okucinezela, ukumelana okuphantsi kweenyembezi | Ukumelana nokulila kuphucuke kakhulu |
| Ukugquma | Akukho mingxunya | Ukuvuleka kwe-Porosity kunokufikelela kwi-70%-90% |
Iimpawu zokusebenza
●I-PTFE: Ayisebenzi ngokweekhemikhali kwaye ayixhathisi kwii-asidi ezinamandla, ii-alkali ezinamandla kunye nezinyibilikisi zendalo, inomlinganiselo wobushushu ophakathi kwe -200°C ukuya kwi +260°C, kwaye ine-dielectric constant ephantsi kakhulu (malunga ne-2.0), nto leyo eyenza ukuba ifaneleke kwi-high-frequency circuit insulation.
● i-ePTFE: Isakhiwo esineembobo ezincinci sinokufumana iipropati ezingangeni manzi neziphefumlayo (ezifana nomgaqo weGore-Tex), kwaye sisetyenziswa kakhulu kwii-implants zonyango (ezifana nee-vascular patches). Isakhiwo esineembobo zifanelekile ukuvala ii-gaskets (ziphinde zibuyele emva kokucinezelwa ukuze zizalise isithuba).
Iimeko eziqhelekileyo zesicelo
● I-PTFE: Ifanelekile kwi-insulation yekhebula enobushushu obuphezulu, ii-bearing lubrication coatings, ii-linings zemibhobho yamakhemikhali, kunye nee-linings ze-reactor ezicocekileyo kakhulu kushishino lwe-semiconductor.
● i-ePTFE: Kwintsimi yekhebula, isetyenziswa njengomaleko wokukhusela iintambo zonxibelelwano ezisebenzisa amaxesha amaninzi, kwicandelo lezonyango, isetyenziselwa imithambo yegazi yokwenziwa kunye nee-sutures, kwaye kwicandelo lezoshishino, isetyenziselwa ii-membranes ze-proton exchange cell kunye nezinto zokucoca umoya.
I-PTFE kunye ne-ePTFE nganye ineenzuzo zayo. I-PTFE ifanelekile kwiindawo ezinobushushu obuphezulu, uxinzelelo oluphezulu, kunye neendawo ezirhabaxa ngeekhemikhali ngenxa yokumelana kwayo nobushushu obuphezulu, ukumelana neekhemikhali, kunye nomlinganiselo ophantsi wokungqubana; i-ePTFE, enokuguquguquka kwayo, ukungena komoya, kunye nokuhambelana kwezinto eziphilayo okubangelwa yisakhiwo sayo esineembobo ezincinci, isebenza kakuhle kumashishini ezonyango, okucoca, kunye nokuvala okunamandla. Ukukhetha izinto kufuneka kumiselwe ngokusekelwe kwiimfuno zesimo esithile sokusetyenziswa.
Zithini izicelo ze-ePTFE kwicandelo lezonyango?
i-ePTFE (i-polytetrafluoroethylene eyandisiweyo)Isetyenziswa kakhulu kwicandelo lezonyango, ikakhulu ngenxa yesakhiwo sayo esikhethekileyo see-microporous, ukuhambelana kwezinto eziphilayo, iipropati zayo ezingenabungozi, ezingashukumisiyo kwaye ezingezizo ezibangela umhlaza. Nazi ezinye zezona zicelo zayo ziphambili:
1. Intsimi yentliziyo kunye nemithambo yegazi
Imithambo yegazi yokwenziwa: i-ePTFE yeyona nto isetyenziswa kakhulu kwimithambo yegazi yokwenziwa, imalunga nama-60%. Ulwakhiwo lwayo olunemingxuma emincinci luvumela iiseli zezicubu zomntu kunye nemithambo yegazi ukuba zikhule kuyo, zenze unxibelelwano olusondeleyo kwizicubu ze-autologous, ngaloo ndlela iphucula izinga lokuphiliswa kunye nokuqina kwemithambo yegazi yokwenziwa.
I-Heart patch: isetyenziselwa ukulungisa izicubu zentliziyo, ezifana ne-pericardium. I-ePTFE heart patch inokuthintela ukunamathelana phakathi kwentliziyo kunye nezicubu ze-sternum, inciphise umngcipheko wotyando lwesibini.
I-Vascular stent: i-ePTFE ingasetyenziselwa ukwenza uqweqwe lwee-vascular stents, kwaye ukuhambelana kwayo kakuhle kunye neempawu zayo zoomatshini zinceda ekunciphiseni ukudumba kunye ne-thrombosis.
2. Utyando lweplastiki
Izinto ezifakelwayo ebusweni: I-ePTFE ingasetyenziselwa ukwenza izinto zeplastiki zobuso, ezifana ne-rhinoplasty kunye nezinto zokuzalisa ubuso. Ulwakhiwo lwayo olunemingxuma emincinci lunceda ukukhula kwezicubu kwaye lunciphise ukungamkeleki.
Ukufakelwa kwamathambo: Kwicandelo le-orthopedics, i-ePTFE ingasetyenziselwa ukwenza ukufakelwa kwamalungu, kwaye ukumelana kwayo nokuguguleka kakuhle kunye nokuhambelana kwayo ne-biomedical kunceda ukwandisa ubomi benkonzo yokufakelwa kwamalungu.
3. Ezinye izicelo
Iipatches zeHernia: Iipatches zeHernia ezenziwe nge-ePTFE zinokuthintela ngempumelelo ukuphinda kwehernia, kwaye ulwakhiwo lwayo olunemingxuma lunceda ukuhlanganiswa kwezicubu.
Ii-sutures zonyango: Ii-sutures ze-ePTFE zinokuguquguquka okuhle kunye namandla okutsalwa, nto leyo enokunciphisa ukunamathela kwezicubu emva kotyando.
Iivalvu zentliziyo: i-ePTFE ingasetyenziselwa ukwenza iivalvu zentliziyo, kwaye ukuqina kwayo kunye nokuhambelana kwayo kunceda ukwandisa ubomi benkonzo yeevalvu.
4. Iingubo zezixhobo zonyango
I-ePTFE ingasetyenziselwa ukugquma izixhobo zonyango, ezinje ngee-catheters kunye nezixhobo zotyando. I-coefficient yayo ephantsi yokungqubana kunye nokuhambelana kwezinto eziphilayo kunceda ukunciphisa umonakalo wezicubu ngexesha lotyando.
Ixesha leposi: Epreli-27-2025