Fiberglass avɔ si wofa PTFE nye nusi wotsɔ wɔe to fiberglass avɔ si wotsɔ polytetrafluoroethylene (PTFE) kaka de tsii me eye emegbe wotsɔe de dzoxɔxɔ gã me. Woate ŋu ama eƒe wɔwɔme ɖe akpa eve me: PTFE ƒe nutsyɔnu kple fiberglass gɔmeɖoanyi avɔ.
Le nuto siwo me atikewo gblẽa nu le me la, xɔtuɖaŋu ƒe tɔtrɔwo nɔ te ɖe nusi gblẽa nu ƒe ƒomevi, eƒe agbɔsɔsɔ, kple dzoxɔxɔ dzi, kpakple nenye be edzea nusi wotsɔ blae alo nusi le ete koŋ dzi. Mina míalé ŋku ɖe esia ŋu le ƒuƒoƒo ɖesiaɖe me tso avɔ siwo wotsɔ PTFE-si wotsɔ blae ƒe nukpɔsusu nu:
I. Tɔtrɔ siwo va le PTFE ƒe Nutsyɔtsyɔ me: Eli ke ŋutɔ le Nya akpa gãtɔ me
PTFE xɔ ŋkɔ be enye 'Plastics Fia' le eƒe carbon-fluorine ƒe kadodo sesẽ ŋutɔ kple atikewo ƒe dɔmawɔmawɔ nyuie si lolo ŋutɔ ta. Le nuto siwo me atikewo gblẽna le zi geɖe (siwo dometɔ aɖewoe nye aqua regia si woɖa, sulphuric acid si me wode nu me, nitric acid si me wode nu me, organic solvents, kple bubuawo) la, eƒe molecule kɔsɔkɔsɔ ƒe wɔwɔme metoa atikewo ƒe tɔtrɔ aɖeke kloe me o. Gake le nɔnɔme sesẽ siwo gbɔna me la, xɔa agblẽ:
- Elemental fluorine (F2), chlorine trifluoride (ClF3), kple nu mawo tɔgbe ateŋu agbã carbon-carbon ƒe megbeƒu, si ana nusi wotsɔ blae la nagblẽ.
- Le dzoxɔxɔ kple nyaƒoɖeamenu gã me la, Freon-ƒomevi ƒe atike aɖewo ate ŋu ana PTFE navuvu vevie. Togbɔ be atikewo ƒe dɔwɔwɔ madzɔ kokoko o hã la, dzɔdzɔmeŋusẽ ƒe wɔwɔme kpea fu le kristalo ƒe ɖiɖi, eƒe lolome ƒe kekeɖenudɔwɔwɔ, kple ŋusẽ ƒe bu le molecule ƒe kɔsɔkɔsɔ siwo wozi ɖe wo nɔewo dzi ta.
3. Oxidizing Acids Sesẽwo le Dzoxɔxɔ Gãwo Me
- Nyrɔ ɖe nitric acid si le dzudzɔ tum alo sulphuric acid si me dzo le me ɣeyiɣi didi ate ŋu awɔ oxidize vivivi le PTFE ƒe anyigba dzi, si ana polar ƒuƒoƒowo abe carbonyl kple hydroxyl ƒuƒoƒowo ene, eye wòana anyigba ƒe ŋusẽ nadzi ɖe edzi. Gake ƒã hafi wokpɔa esia le dɔ siwo wozãna ɖaa me.
Nya Vevi: Le atikewo ƒe akpa gãtɔ gome la, PTFE ƒe nutsyɔnu la ŋutɔ ƒe wɔwɔme 'metrɔ o.' Gake zi geɖe la, kuxia nɔa nyateƒe si wònye be menye nusi me tsi mate ŋu age ɖo kura o, kpakple eƒe dzɔdzɔme nɔnɔme hã me.
II. Tɔtrɔ Siwo Le Fiberglass Base Fabric Me: Nu Bliboa ƒe Kadodo Gbɔdzɔgbɔdzɔ
Nu vevi siwo le fiberglass me enye silicon dioxide (SiO2) kple metal oxide aɖewo. Ne akpa sia nya xɔ dzo ko la, avɔ si me dzoxɔxɔ le ŋutɔ ƒe wɔwɔme bliboa agbã.
1. Hydrofluoric Acid (HF) ƒe amedzidzedze si wua ame .
- Macroscopic Manifestation: Avɔa ƒe goglome megasẽna kabakaba o, eva nɔa abe ŋutigbalẽ falɛfalɛ si me nusi wotsɔ blae koe susɔ ene, evuvuna bɔbɔe ne ehee, eye mama gã aɖe nɔa nusi wotsɔ blae kple nusi wotsɔ blae dome. Esiae nye atikewo ƒe xɔxlɔ̃ si wovɔ̃na na wu ɖesiaɖe na nusiwo wotsɔ ahuhɔ̃e ka wɔe. Zi alesi pindowo le nusi wotsɔ blae alo eƒe go siwo woɖe ɖe go me ko la, nusiwo gblẽna le eŋu la gblẽa nu ŋutɔ.
2. Slow Etching by Strong Alkalis (vevietɔ alkali dzodzoe siwo me wode nu me) .
- Dɔwɔɖoɖo ƒe Tɔtrɔwo: OH− ions gbãa siloxane ƒe kadodowo (-Si-O-Si-) le glass network la me, eye wowɔa silicates siwo me wodea tsii. Ka la ƒe anyime trɔna tso esi le gbadzaa va zua esi le gbadzaa, eye do siwo me woɖea nu le kple gbagbãƒewo dona, ka la ƒe didime nɔa tsɛ, eye mlɔeba la, egbãna.
- Macroscopic Manifestation: Ŋusẽ dzi ɖena kpɔtɔna ɣesiaɣi, avɔa va nɔa gbagbãm, eye ne wobɔbɔ la, ka siwo gbã la dona to nusi wotsɔ blae la me, si wɔnɛ be nusi wotsɔ blae la gbãna eye wòɖena.
3. Acid Media (negbe hydrofluoric acid koe mele eme o) .
- Dɔwɔnu ƒe Tɔtrɔwo: Asidi siwo bɔ (hydrochloric acid, sulfuric acid, kple bubuawo) lɔ̃a nusiwo menye silica o (abe aluminum, calcium oxides, kple bubuawo ene) le fiberglass la me, eye wogblẽa silica ƒe ƒunukpeƒe akpa gãtɔ ɖi. Woyɔa nuwɔna sia zi geɖe be 'leaching,' si wɔa microporous structure le fiber la ƒe anyime.
- Macroscopic Manifestation: Avɔa sesẽna eye wògbãna wu, eye tɔtrɔwo va le eƒe ɖeɖe me, togbɔ be woate ŋu alé eƒe nɔnɔme bliboa me ɖe asi hã. Ŋusẽ dzi ɖena kpɔtɔna le nuteɖeamedzi ƒe susu tsɔtsɔ ɖe nu ŋu ta.
III. Tɔtrɔwo le Composite Interface: Dodokpɔ si Woɣla
Zi geɖe la, atikewo ƒe nɔnɔmewo medzea wo dzi ŋkume kple ŋkume o ke boŋ wogena ɖe eme tso goawo dzi alo to nu suesuesue siwo gblẽ le wo ŋu me.
- Geɖe kple Delamination: Organic solvents alo acid solutions gena ɖe pinholes, micro-cracks, alo nugbɔ siwo wotso le PTFE coating la me, dzea fiberglass la dzi. Nuwɔna ƒe nuwɔna alo tsi siwo gena ɖe eme ƒoa ƒu ɖe ƒomedodoa me, si wɔnɛ be osmotic pressure dona, si wɔnɛ be PTFE ƒe nutsyɔnu la ƒoa ƒu eye wòɖea ɖa le fiberglass substrate la me le agbɔsɔsɔ gã aɖe me.
- Stress Corrosion Cracking: Avɔ si ƒe dzoxɔxɔ lolo la le tete me le ezãɣi. Atikewo (vevietɔ alkali sesẽwo) ƒe xɔxlɔ̃ wɔa dɔ aduadu kple mɔ̃wo ƒe nuteɖeamedzi, si wɔnɛ be gbagbãƒewo kaka kabakaba le ka ƒe didime ƒe mɔ dzi, si wɔnɛ be avɔa ƒe gbagbã kpata kple brittle-fracture morphology dzadzɛ le gbagbãƒea.
Le nuto siwo me atikewo gblẽa nu le me la, woate ŋu aƒo nu tso fiberglass avɔ si wotsɔ PTFE ƒoe ƒe wɔwɔme ƒe tɔtrɔwo ŋu kpuie ale: 'King of Plastics' ƒe nutsyɔnu la gakpɔtɔ li ke abe to ene kloe, gake fiberglass gɔmeɖoanyi avɔa—ne wonya ge ɖe eme alo dze edzi ko la—va zua Achilles ƒe afɔkpodzi, si wɔnɛ be ƒunukpeƒewo ƒe ʋuʋu, dometsotso ƒe ʋuʋu, eye nu bliboa mu tso ememe yi gota.
Míeléa subɔsubɔ ƒe xexemenunya si wotu ɖe dɔnyala kple fɔmaɖimaɖi dzi me ɖe asi ɣesiaɣi, eye míetsɔ mía ɖokui na be míana egbɔkpɔnuwo le teƒe ɖeka kple subɔsubɔdɔ si me woalé ŋku ɖo la wò!
