Nakuba i-PTFE (i-polytetrafluoroethylene) kanyeI-ePTFE(i-polytetrafluoroethylene eyandisiwe) inesisekelo samakhemikhali esifanayo, inomehluko omkhulu wesakhiwo, ukusebenza kanye nezindawo zokusebenzisa.
Isakhiwo samakhemikhali kanye nezakhiwo eziyisisekelo
Kokubili i-PTFE kanye ne-ePTFE enziwe i-polymerized kusuka kuma-monomers e-tetrafluoroethylene, futhi womabili anefomula yamakhemikhali (CF₂-CF₂)ₙ, angasebenzi kahle ngamakhemikhali futhi amelana nezinga lokushisa eliphezulu. I-PTFE yakhiwe ngokushisa kwezinga lokushisa eliphezulu, futhi amaketanga e-molecular ahlelwe eduze ukuze akhe isakhiwo esiminyene, esingenambobo. I-ePTFE isebenzisa inqubo yokwelula ekhethekile ukwenza i-PTFE ifake i-fiberize emazingeni okushisa aphezulu ukuze yakhe isakhiwo se-mesh esinezimbotshana esine-porosity engu-70% -90%.
Ukuqhathaniswa kwezakhiwo zomzimba
| Izici | I-PTFE | I-ePTFE |
| Ukuminyana | Phezulu (2.1-2.3 g/cm³) | Phansi (0.1-1.5 g/cm³) |
| Ukuvumeleka | Akukho permeability (kuminyene ngokuphelele) | Ukungena okuphezulu (ama-micropores avumela ukusakazeka kwegesi) |
| Ukuvumelana nezimo | Iqinile futhi iqatha | Ukuguquguquka okuphezulu nokunwebeka |
| Amandla omshini | Amandla acindezelayo aphezulu, ukumelana nokukhala okuphansi | Kuthuthuke kakhulu ukumelana nezinyembezi |
| I-Porosity | Azikho izimbotshana | I-Porosity ingafinyelela ku-70% -90% |
Izici zokusebenza
●I-PTFE: Ayisebenzi ngamakhemikhali futhi imelana nama-asidi aqinile, ama-alkali aqinile nezinyibilikisi eziphilayo, inebanga lokushisa elisukela -200°C kuya +260°C, futhi ine-dielectric constant ephansi kakhulu (cishe u-2.0), okuyenza ifanelekele ukufakwa kwe-high-frequency circuit insulation.
● I-ePTFE: Isakhiwo se-microporous singafinyelela izici ezingangenwa amanzi neziphefumula (njengesimiso se-Gore-Tex), futhi sisetshenziswa kakhulu ekufakweni kwezokwelapha (njengamabala emithambo). Isakhiwo se-porous sifanelekile ukuvala ama-gaskets (i-rebound emva kokucindezela ukugcwalisa igebe).
Izimo zohlelo lokusebenza ezijwayelekile
● I-PTFE: Ifanele ukugqunywa kwekhebula lokushisa eliphezulu, okunama-lubrication coatings, amapayipi amakhemikhali asetshenziswayo, kanye namalayini we-reactor ahlanzekile kakhulu embonini ye-semiconductor.
● I-ePTFE: Emkhakheni wekhebula, isetshenziswa njengesendlalelo se-insulation sezintambo zokuxhumana ezihamba ngamaza aphezulu, emkhakheni wezokwelapha, isetshenziselwa imithambo yegazi yokwenziwa kanye nama-sutures, futhi emkhakheni wezimboni, isetshenziselwa ulwelwesi lokushintshana kwe-proton cell kanye nezinto zokuhlunga umoya.
I-PTFE ne-ePTFE ngayinye inezinzuzo zayo. I-PTFE ifanele izinga lokushisa eliphezulu, umfutho ophezulu, kanye nezindawo ezigqwala ngamakhemikhali ngenxa yokumelana nokushisa okuphakeme, ukumelana namakhemikhali, kanye ne-coefficient ephansi yokungqubuzana; I-ePTFE, ngokuguquguquka kwayo, ukungena komoya, kanye nokuvumelana kwe-biocompatibility okulethwe isakhiwo sayo se-microporous, isebenza kahle ezimbonini zezokwelapha, zokuhlunga, nezinamandla zokuvala uphawu. Ukukhethwa kwezinto kufanele kunqunywe ngokusekelwe ezidingweni zesimo sohlelo oluthile.
Yiziphi izinhlelo zokusebenza ze-ePTFE emkhakheni wezokwelapha?
I-ePTFE (i-polytetrafluoroethylene enwetshiwe)isetshenziswa kabanzi emkhakheni wezokwelapha, ikakhulukazi ngenxa yesakhiwo sayo esiyingqayizivele se-microporous, i-biocompatibility, izakhiwo ezingezona ezinobuthi, ezingazweli nezingezona umdlavuza. Okulandelayo yizinhlelo zayo eziyinhloko:
1. Inkundla yenhliziyo
Imithambo yegazi yokwenziwa: I-ePTFE isetshenziswa kabanzi kakhulu emithanjeni yegazi yokwenziwa, ebalwa cishe ngama-60%. Isakhiwo sayo se-microporous sivumela amangqamuzana ezicubu zomuntu kanye nemithambo yegazi ukuthi akhule kuwo, enze uxhumano oluseduze nezicubu ze-autologous, ngaleyo ndlela kuthuthukisa izinga lokuphulukisa nokuqina kwemithambo yegazi yokwenziwa.
Isiqephu senhliziyo: sisetshenziselwa ukulungisa izicubu zenhliziyo, njenge-pericardium. I-ePTFE heart patch ingavimbela ukunamathela phakathi kwenhliziyo nezicubu ze-sternum, kunciphise ingozi yokuhlinzwa kwesibili.
I-Vascular stent: I-ePTFE ingasetshenziswa ukwenza ukumbozwa kwama-stents e-vascular, futhi i-biocompatibility yayo enhle kanye nezakhiwo zemishini kusiza ukunciphisa ukuvuvukala kanye ne-thrombosis.
2. Ukuhlinzwa kwepulasitiki
Izimila zobuso: I-ePTFE ingasetshenziswa ukwenza izinto zepulasitiki zobuso, njenge-rhinoplasty nezigcwalisi zobuso. Isakhiwo sayo se-microporous sisiza ukukhula kwezicubu futhi kunciphisa ukwenqatshwa.
Izimila zamathambo: Emkhakheni wezokwelashwa kwamathambo, i-ePTFE ingasetshenziswa ukwenza izimila ezihlanganyelwe, futhi ukumelana kwayo nokugqokwa okuhle kanye nokuhambisana kwayo ne-biocompatibility kusiza ukukhulisa impilo yesevisi yezimila.
3. Ezinye izinhlelo zokusebenza
I-Hernia patches: Ama-Hernia patches enziwe nge-ePTFE angavimbela ngempumelelo ukuphindaphinda kwe-hernia, futhi isakhiwo sayo esinezimbotshana sisiza ukuhlanganiswa kwezicubu.
Ama-sutures ezokwelapha: I-ePTFE sutures inokuguquguquka okuhle namandla aqinile, okunganciphisa ukunamathela kwezicubu ngemva kokuhlinzwa.
Amavalvu enhliziyo: I-ePTFE ingasetshenziswa ukwenza amavalvu enhliziyo, futhi ukuqina kwayo kanye nokuhambisana kwayo ne-biocompatibility kusiza ukwandisa impilo yesevisi yamavalvu.
4. Izingubo zemishini yezokwelapha
I-ePTFE ingaphinda isetshenziselwe ukumbozwa kwemishini yezokwelapha, njengama-catheter namathuluzi okuhlinza. I-coefficient yayo ephansi yokungqubuzana kanye ne-biocompatibility isiza ukunciphisa ukulimala kwezicubu phakathi nokuhlinzwa
Isikhathi sokuthumela: Apr-27-2025