Dzoxɔxɔ ƒe didime si keke ta Ele be PTFE tape nabla kakaɖedzitɔe le -70°C (alo esi mede nenema o) eye wòatsi agbe ne wotsɔe ɖa atraɖii le 200-260°C – si ƒe didime wu 300°C. Esia bia be woawɔ nusi wotsɔna léa nu ɖe nu ŋu si nɔa te ɖe nɔnɔme sesẽwo nu evɔ womewɔa nu ɖekae ƒe kpododonu alo kadodo si le wo nɔewo dome o le goawo dometɔ ɖesiaɖe si gbɔ eme o.
Zi geɖe la, nusi wotsɔna léa nu ɖe nu ŋu nyea silicone-sensitive-sensitive adhesive (PSA) tɔxɛ aɖe si wofa ɖe PTFE film siwo ŋu wotrɔ asi le le anyigba dzi alo fiberglass avɔ si wotsɔ PTFE de tsii dzi. Nu vevitɔ si ana dɔwɔwɔ nali ke le dzoxɔxɔ ƒe fesre si keke alea me la le network si trɔna ɖe nɔnɔmewo ŋu tutu me – aɖaŋu si da sɔ le dzoxɔxɔ sue ƒe tsidzadza, dzoxɔxɔ gã ƒe ʋuʋudedi ƒe tsitretsitsi, kple dzoxɔxɔ ƒe ʋuʋu ƒe mɔɖeɖe ɖe nu ŋu.
Aokai PTFE wɔ PTFE kasɛt siwo ƒe dzoxɔxɔ keke ta to gɔmeɖose siwo ŋu míeƒo nu tsoe le ete zazã me. Nyati sia ɖe aɖaŋunu vevi ene me: tɔtrɔ ƒe ƒuƒoƒo ƒe wɔwɔme, atsiaƒu-ƒukpo ƒe biphasic microstructure, gradient crosslinking, kple dzoxɔxɔ-si li ke composite fillers.
Trɔtrɔ Layer Dɔwɔɖoɖo le Substrate kple Adhesive Layer Dome
1. Kuxi vevitɔ – PTFE ƒe anyigbadziŋusẽ
PTFE ɖea ŋusẽ si le anyigba dzi si bɔbɔ ŋutɔ (18-20 dynes/cm) fiana. Direct coating of adhesive dina be yeaɖe ɖa le dzoxɔxɔ ƒe tsatsam le dzoxɔxɔ ƒe kekeɖenudɔwɔwɔ ƒe xexlẽdzesi siwo mesɔ o ta – PTFE kekena 30-40x wu fiberglass.
2. Anyigbadzidɔwɔwɔ kple primer anchoring
Be woakpɔ esia gbɔ la, wowɔa ɖe PTFE ƒe anyigba dzi atikewo ƒe nuŋɔŋlɔ kple sodium-naphthalene complexes alo plasma treatment be woatsɔ ato C=C double bonds kple oxygen-containing polar groups vɛ. Emegbe la, wozãa silicone primer si wotsɔ ɖe adzɔgbe si le tsɛ ŋutɔ (le kpɔɖeŋu me, silane coupling agent si me vinyl le) tsɔ wɔa 'molecular bridge' le ƒomedodoa me to atikewo ƒe kadodo me.
3. Nuteɖeamedzi-buffering interlayer
Le atike aɖewo me la, wotsɔa domedome ƒuƒoƒo si me ʋuʋudedi mele o, si me ʋuʋudedi le ŋutɔ (silicone si le abe gel ene si ƒe akpawo te ŋu trɔna) dea ƒuƒoƒo si wowɔ dɔ kple nusi léna ɖe nu ŋu vevitɔ dome. Esia xɔa nuteɖeamedzi si le domedome si dzoxɔxɔ ƒe tɔtrɔ kpata hena vɛ eye wòxea mɔ na nusi wotsɔna léa nu ɖe nu ŋu ƒe nugbɔ kɔkɔ.
Ƒu-ƒukpowo ƒe Biphasic Microstructure ƒe Ðoɖowɔwɔ
Adhesive matrix vevitɔe nye PSA ɖoɖo si wonya nyuie si me MQ silicone resin (ƒukpo ƒe akpa si kaka) kple polysiloxane si ƒe molecule ƒe kpekpeme lolo (atsiaƒu ƒe akpa si yia edzi) le.
1. MQ silicone resin – ƒukpo sesẽ ƒe akpa
Enaa ɖekawɔwɔ, ŋusẽ si léa nu, kple dzoxɔxɔ gã ƒe tsitretsitsi ɖe ʋuʋudedi ŋu. Eƒe M/Q molar ratio (zi geɖe la, 0.6-0.9) kple nusuewo ƒe lolome ƒe kaka dzi kpɔkpɔ pɛpɛpɛ kpɔa egbɔ be wotsɔe de ɖekawɔwɔ me le akpa si yia edzi la me be wòawɔ ŋutilã me crosslinking teƒewo.
Enaa tack kabakaba, dzoxɔxɔ sue ƒe tsidzadza, kple asitɔtrɔ le nɔnɔmewo ŋu. Zi geɖe la, wotiaa methyl vinyl silicone rababa si ƒe molecule lolo alo methyl phenyl vinyl silicone rababa.
3. Etɔxɛ optimization na keke dzoxɔxɔ ƒe didime
ƒe agbɔsɔsɔ sue aɖe dea eme. siloxane ƒe akpa siwo me phenyl sɔ gbɔ ɖo Wotsɔa Phenyl ƒuƒoƒowo tea polydimethylsiloxane ƒe kristalowɔwɔ le dzoxɔxɔ si le sue me ɖe to, si wɔnɛ be aŋea ƒe dzoxɔxɔ si le gbagbãm la ɖiɖina ɖe anyi wu -100°C. Le ɣeyiɣi ma ke me la, phenyl ƒuƒoƒowo doa dzoxɔxɔ-oxidative ƒe gbegblẽ ƒe tsitretsitsi ɖe ŋgɔ le dzoxɔxɔ gã me, si wɔnɛ be atsiaƒu ƒe akpa si yia edzi la te ŋu léa elasticity gã aɖe ɖe te le dzoxɔxɔ ƒe fesre gbadza aɖe dzi.
Multi-Layer alo Gradient Crosslinking Design na Dzoxɔxɔ ƒe Ʋuʋu Tsitretsitsi
Wozãa nu eve ƒe nutsyɔtsyɔ ƒe mɔnu be woada asɔ le dzoxɔxɔ gã ƒe ʋuʋu ƒe tsitretsitsi kple dzoxɔxɔ sue ƒe tackiness:
1. Ememe ƒuƒoƒo (substrate ƒe akpa) .
Relatively high crosslink density , si naa ŋusẽ sesẽ si léa dzoxɔxɔ gã kple ŋusẽ si wɔa ɖeka abe xɔtunu si te ŋu nɔa te ɖe lãɖeɖe nu ene.
2. Gotagome ƒuƒoƒo (bonding surface) .
Ultra-low crosslink density kple molecule kɔsɔkɔsɔ siwo ʋãna ŋutɔ, si kpɔa egbɔ be tsidzadza kabakaba le adherends dzi le dzoxɔxɔ si bɔbɔ me eye tack si sɔ le gɔmedzedzea me.
Alo, wowɔa crosslink density ƒe gradient si yia edzi tso ememe yi gota le ƒuƒoƒo ɖeka me to curing processes dzi, si ƒoa dɔwɔwɔ ƒe akpa sesẽwo kple esiwo te ŋu trɔna bɔbɔe la nu ƒu ɖekae.
Aokai PTFE zãa gradient crosslinking mɔ̃ɖaŋununya tsɔ kpɔa egbɔ be tape la gakpɔtɔ te ŋu trɔna le -70°C (si wɔnɛ be woate ŋu awɔ gbãtɔ ƒe tack kple conformability) esime wòléa ɖekawɔwɔ ƒe ŋusẽ me ɖe asi le 260°C (si xea mɔ na creep kple adhesive transfer).
Dzoxɔxɔ-sitɔa te Nusiwo Wotsɔ Kpea Nuwoe
Wokaka nano-scale fumed silica nyuie ɖe adhesive matrix la me hena ŋusẽdodo, wotsɔe ƒo ƒu kple dɔwɔwɔ ƒe hatsotso eve siwo wotsɔ yɔa nu me:
1. Nusiwo wotsɔ kpe ɖe eŋu siwo te ŋu nɔa te ɖe dzoxɔxɔ nu
Cerium oxide, iron oxide, kple radical scavengers bubuwo xea mɔ na siloxane ƒe axadzikɔsɔkɔsɔwo ƒe oxidative hardening kple akɔta ƒe gbegblẽ le dzoxɔxɔ sesẽ me. Antioxidants siawo didia dɔwɔwɔ ƒe agbenɔƒe ɖe edzi le dzoxɔxɔ 260°C me.
2. Dzoxɔxɔ ƒe mɔ̃ siwo yɔa nu me
si lolo abe micron ene , alumina Aluminium nitride , kple bubuawo, tsɔa dzoxɔxɔ ƒua gbe kabakaba be wòaɖe dzoxɔxɔ si ƒoa ƒu ɖe ememe dzi akpɔtɔ eye wòaɖe tsitsi dzi akpɔtɔ. Esia le vevie ŋutɔ na dɔwɔwɔ siwo me wozãa kasɛt la abe dzoxɔxɔ ƒe ƒomedodo ene alo afisi dzoxɔxɔ si ƒo ƒu tso nusi wotsɔ ɖo edzi me ate ŋu ana nusi léna ɖe nu ŋu nagblẽ kabakaba le.
Fillers katã hiã na surface passivation alo silane treatment be woaƒo asa na modulus ƒe dziyiyi fũ akpa kple adhesive hardening le dzoxɔxɔ si bɔbɔ me.
Kpuie ko la – A Adaptive Network for Extreme Nɔnɔmewo
Míewɔna ɖe subɔsubɔ xexemenunya si nye dɔwɔwɔ nyuie kple fɔmaɖimaɖi dzi, si míetsɔ mía ɖokui na be míana egbɔkpɔnu siwo katã le teƒe ɖeka kple kpekpeɖeŋu si ŋu wobu nyuie la wò!
