Ngakhale PTFE (polytetrafluoroethylene) ndiePTFE(expanded polytetrafluoroethylene) ali ndi maziko a mankhwala omwewo, ali ndi kusiyana kwakukulu pamapangidwe, ntchito ndi malo ogwiritsira ntchito.
Kapangidwe ka mankhwala ndi zinthu zofunika
Onse PTFE ndi ePTFE ndi ma polymerized kuchokera ku tetrafluoroethylene monomers, ndipo onse ali ndi formula ya mankhwala (CF₂-CF₂) ₙ, yomwe imakhala yotentha kwambiri komanso imagonjetsedwa ndi kutentha kwakukulu. PTFE imapangidwa ndi kutentha kwapamwamba kwambiri, ndipo maunyolo a molekyulu amakonzedwa bwino kuti apange mawonekedwe osakanikirana, osakhala ndi porous. ePTFE amagwiritsa ntchito njira yapadera yotambasula kuti PTFE fiberize pa kutentha kwambiri kupanga porous mauna dongosolo ndi porosity wa 70% -90%.
Kuyerekezera zinthu zakuthupi
| Mawonekedwe | PTFE | ePTFE |
| Kuchulukana | Kukwera (2.1-2.3 g/cm³) | Pansi (0.1-1.5 g/cm³) |
| Permeability | Palibe permeability (yothina kwathunthu) | High permeability (ma micropores amalola kufalikira kwa gasi) |
| Kusinthasintha | Zolimba komanso zolimba | High kusinthasintha ndi elasticity |
| Mphamvu zamakina | Mkulu compressive mphamvu, otsika misozi kukana | Kuwongolera kwambiri kukana misozi |
| Porosity | Palibe pores | Porosity imatha kufika 70% -90% |
Makhalidwe ogwira ntchito
●PTFE: Ndi mankhwala osakanikirana komanso osagwirizana ndi ma asidi amphamvu, alkalis amphamvu ndi zosungunulira zamoyo, zimakhala ndi kutentha kwa -200 ° C mpaka + 260 ° C, ndipo zimakhala ndi dielectric yotsika kwambiri (pafupifupi 2.0), zomwe zimapangitsa kuti zikhale zoyenera kutsekemera kwamagetsi othamanga kwambiri.
● ePTFE: Mapangidwe a microporous amatha kupeza zinthu zopanda madzi komanso zopumira (monga mfundo ya Gore-Tex), ndipo amagwiritsidwa ntchito kwambiri mu implants zachipatala (monga mitsempha ya mitsempha). Kapangidwe ka porous ndi koyenera kusindikiza ma gaskets (kubwereranso pambuyo pa kupanikizana kuti mudzaze kusiyana).
Zochitika zofananira ndikugwiritsa ntchito
● PTFE: Yoyenera kutsekereza chingwe cha kutentha kwambiri, zokhala ndi zokutira zokometsera, zomangira zamapaipi amankhwala, ndi zomangira zoyera kwambiri pamakampani opanga ma semiconductor.
● ePTFE: M'munda wa chingwe, umagwiritsidwa ntchito ngati kutsekemera kwa zingwe zoyankhulirana zothamanga kwambiri, m'chipatala, zimagwiritsidwa ntchito popanga mitsempha ya magazi ndi ma sutures, komanso m'mafakitale, zimagwiritsidwa ntchito popanga mafuta a cell proton exchange membranes ndi zinthu zosefera mpweya.
PTFE ndi ePTFE iliyonse ili ndi zabwino zake. PTFE ndiyoyenera kutentha kwambiri, kuthamanga kwambiri, komanso malo owononga mankhwala chifukwa cha kukana kwake kutentha kwambiri, kukana kwamankhwala, komanso kugundana kochepa; ePTFE, ndi kusinthasintha kwake, kupuma kwa mpweya, ndi biocompatibility yomwe imabweretsedwa ndi mawonekedwe ake a microporous, imagwira ntchito bwino m'mafakitale azachipatala, kusefera, ndi kusindikiza kwamphamvu. Kusankhidwa kwa zinthu kuyenera kutsimikiziridwa malinga ndi zosowa za momwe mungagwiritsire ntchito.
Kodi ePTFE imagwiritsidwa ntchito bwanji pazachipatala?
ePTFE (yowonjezera polytetrafluoroethylene)amagwiritsidwa ntchito kwambiri pazachipatala, makamaka chifukwa cha mawonekedwe ake apadera a microporous, biocompatibility, non-toxic, non-sensitizing and non-carcinogenic properties. Zotsatirazi ndizo ntchito zake zazikulu:
1. Malo a mtima
Mitsempha yamagazi Yopanga: ePTFE ndiyomwe imagwiritsidwa ntchito kwambiri popanga mitsempha yamagazi, yomwe imakhala pafupifupi 60%. Kapangidwe kake kakang'ono kamene kamalola kuti maselo amtundu wamunthu ndi mitsempha yamagazi azikula mmenemo, ndikupanga kulumikizana pafupi ndi minofu ya autologous, potero kumathandizira kuchiritsa komanso kulimba kwa mitsempha yamagazi.
Chigamba cha mtima: chimagwiritsidwa ntchito kukonza minofu ya mtima, monga pericardium. EPTFE mtima chigamba chingalepheretse kumamatira pakati pa mtima ndi sternum minofu, kuchepetsa chiopsezo cha opaleshoni yachiwiri.
Vascular stent: ePTFE ingagwiritsidwe ntchito kupanga zokutira za mitsempha ya mitsempha, ndipo biocompatibility yake yabwino ndi makina amathandizira kuchepetsa kutupa ndi thrombosis.
2. Opaleshoni ya pulasitiki
Kuyika kumaso: ePTFE itha kugwiritsidwa ntchito kupanga zida zamapulasitiki kumaso, monga rhinoplasty ndi zodzaza kumaso. Mapangidwe ake a microporous amathandizira kukula kwa minofu ndikuchepetsa kukanidwa.
Kuyika kwa mafupa: M'munda wa mafupa, ePTFE ingagwiritsidwe ntchito kupanga implants olowa, ndipo kukana kwake kuvala bwino ndi biocompatibility kumathandiza kuonjezera moyo wautumiki wa implants.
3. Ntchito zina
Zigamba za Hernia: Zigamba za Hernia zopangidwa ndi ePTFE zimatha kuteteza hernia kubwereranso, ndipo mawonekedwe ake a porous amathandiza kuphatikizika kwa minofu.
Ma sutures azachipatala: EPTFE sutures ali ndi kusinthasintha kwabwino komanso mphamvu zolimba, zomwe zimatha kuchepetsa kuphatikizika kwa minofu pambuyo pa opaleshoni.
Ma valve a mtima: ePTFE ingagwiritsidwe ntchito kupanga ma valve a mtima, ndipo kulimba kwake ndi biocompatibility kumathandiza kuonjezera moyo wautumiki wa ma valve.
4. Zovala za chipangizo chachipatala
ePTFE itha kugwiritsidwanso ntchito ngati zokutira pazida zamankhwala, monga ma catheter ndi zida zopangira opaleshoni. Kutsika kwake kocheperako komanso kulumikizana kwachilengedwe kumathandiza kuchepetsa kuwonongeka kwa minofu panthawi ya opaleshoni
Nthawi yotumiza: Apr-27-2025