PTFE mecha ea litabahangata e bua ka mecha ea litaba e entsoeng ka polytetrafluoroethylene (PTFE ka bokhutšoanyane). Se latelang ke kenyelletso e felletseng ea media ea PTFE:
Ⅰ. Lintho tse bonahalang
1.Botsitso ba lik'hemik'hale
PTFE ke thepa e tsitsitseng haholo. E na le khanyetso e matla ea lik'hemik'hale 'me e kenella hoo e batlang e le lik'hemik'hale tsohle. Ka mohlala, tikolohong ea li-acids tse matla (tse kang sulfuric acid, nitric acid, joalo-joalo), li-bases tse matla (joaloka sodium hydroxide, joalo-joalo) le li-solvents tse ngata (tse kang benzene, toluene, joalo-joalo), lisebelisoa tsa PTFE li ke ke tsa itšoara ka lik'hemik'hale. Sena se etsa hore e tumme haholo lits'ebetsong tse kang litiiso le liphaephe tsa liphaephe liindasteri tsa lik'hemik'hale le tsa meriana, hobane liindasteri tsena hangata li hloka ho sebetsana le mefuta e sa tšoaneng ea lik'hemik'hale tse rarahaneng.
2.Ho hanyetsa mocheso
Mecha ea litaba ea PTFE e ka boloka ts'ebetso ea eona ho feta mefuta e mengata ea mocheso. E ka sebetsa ka mokhoa o tloaelehileng mochesong oa -200 ℃ ho isa ho 260 ℃. Ka mocheso o tlase, e ke ke ea fetoha brittle; mochesong o phahameng, e ke ke ea bola kapa ea holofala habonolo joalo ka lipolasetiki tse ling tse tloaelehileng. Mocheso ona o motle oa ho hanyetsa o etsa hore mecha ea litaba ea PTFE e be le litšebeliso tsa bohlokoa sebakeng sa sefofane, lisebelisoa tsa elektroniki le likarolo tse ling. Ka mohlala, tsamaisong ea hydraulic ea sefofane, mecha ea litaba ea PTFE e ka mamella mocheso o phahameng o hlahisoang ke liphetoho tsa mocheso le tsamaiso ea tsamaiso nakong ea sefofane.
3.Low khohlano coefficient
PTFE e na le coefficient e tlase haholo ea likhohlano, e 'ngoe ea tse tlase haholo har'a lisebelisoa tse tiileng tse tsejoang. Li-coefficients tsa eona tse matla le tse tsitsitseng li nyane haholo, tse ka bang 0.04. Sena se etsa hore PTFE dielectric e sebetse haholo ha e sebelisoa joalo ka setlolo likarolong tsa mochini. Mohlala, lisebelisoa tse ling tsa phetisetso ea mochini, li-bearings kapa lihlahla tse entsoeng ka PTFE li ka fokotsa likhohlano lipakeng tsa likarolo tsa mochini, tsa fokotsa tšebeliso ea matla, le ho lelefatsa bophelo ba ts'ebeletso ea lisebelisoa.
4.Tlhahiso ea motlakase
PTFE e na le thepa e ntle ea ho kenya motlakase. E boloka khanyetso e phahameng ea insulation holim'a mefuta e mengata ea maqhubu. Lisebelisoa tsa elektronike, PTFE dielectric e ka sebelisoa ho etsa thepa e sireletsang, joalo ka lera la ho kenya letsoho la lithapo le likhoele. E ka thibela ho lutla ha hajoale, ea netefatsa ts'ebetso e tloaelehileng ea lisebelisoa tsa elektroniki, hape e hanela tšitiso ea kantle ea motlakase.
Ka mohlala, ka lithapo tsa puisano tse potlakileng, PTFE lera la ho kenya letsoho le ka netefatsa botsitso le ho nepahala ha phetisetso ea matšoao.
5.Ho se kgomarele
Bokaholimo ba PTFE dielectric bo na le matla a sa khomarelang. Lebaka ke hore electronegativity ea liathomo tsa fluorine mohahong oa limolek'hule tsa PTFE li phahame haholo, li etsa hore ho be thata bakeng sa PTFE holim'a ho kopana ka lik'hemik'hale le lintho tse ling. Sena se sa khomarelang se etsa hore PTFE e sebelisoe haholo ka ho koahela lijana tsa ho pheha (joaloka lipane tse sa thupeng). Ha lijo li phehiloe ka pane e se nang thupa, ho ke ke ha e-ba bonolo ho khomarela lebota la pan, ho etsa hore ho be bonolo ho hloekisa le ho fokotsa palo ea mafura a sebelisoang nakong ea ho pheha.
Phapano ke efe lipakeng tsa PVDF le PTFE?
PVDF (polyvinylidene fluoride) le PTFE (polytetrafluoroethylene) ka bobeli ke lipolima tse nang le fluorinated tse nang le thepa e ngata e ts'oanang, empa hape li na le phapang e kholo ea sebopeho sa lik'hemik'hale, ts'ebetso le ts'ebeliso. Tse latelang ke liphapang tse kholo tsa bona:
Ⅰ. Sebopeho sa lik'hemik'hale
PVDF:
Sebopeho sa lik'hemik'hale ke CH2−CF2n, e leng polymer ea semi-crystalline.
Ketane ea molek'hule e na le likaroloana tsa methylene (-CH2-) le trifluoromethyl (-CF2-) tse fapaneng.
PTFE:
Sebopeho sa lik'hemik'hale ke CF2−CF2n, e leng perfluoropolymer.
Ketane ea molek'hule e entsoe ka liathomo tsa fluorine ka ho felletseng le liathomo tsa khabone, ntle le liathomo tsa haedrojene.
Ⅱ. Papiso ya tshebetso
| Index ea Ts'ebetso | PVDF | PTFE |
| Ho hanyetsa lik'hemik'hale | Ho hanyetsa lik'hemik'hale tse ntle, empa eseng hantle joaloka PTFE. Ho hanyetsa hantle ho li-acids tse ngata, li-bases le li-solvents tsa organic, empa ho hanyetsa ho futsanehile ho metheo e matla ka mocheso o phahameng. | Inert ho hoo e ka bang lik'hemik'hale tsohle, tse hanyetsanang haholo le lik'hemik'hale. |
| Ho hanyetsa mocheso | Mocheso oa mocheso o sebetsang ke -40℃～150℃,' me tshebetso e tla fokotseha ka mocheso o phahameng. | Mocheso oa mocheso o sebetsang ke -200 ℃～260 ℃, 'me ho hanyetsa mocheso ho ntle haholo. |
| Matla a mochine | Matla a mochine a phahame, a na le matla a matle a ho tsitsa le ho hanyetsa tšusumetso. | Matla a mochine a batla a le tlaase, empa a na le ho feto-fetoha ha maemo le ho hanyetsa mokhathala. |
| Coefficient ea likhohlano | Khokahano ea likhohlano e tlase, empa e phahame ho feta PTFE. | Khokahano ea likhohlano e tlase haholo, e 'ngoe ea tse tlase haholo har'a lisebelisoa tse tiileng tse tsejoang. |
| Tšireletso ea motlakase | Ts'ebetso ea ho kenya motlakase e ntle, empa ha e tšoane le PTFE. | Ts'ebetso ea ho kenya motlakase e ntle haholo, e loketse maqhubu a phahameng le maemo a phahameng a motlakase. |
| Ho se kgomarele | Ho se khomarele ho lokile, empa ha ho hantle joalo ka PTFE. | E na le matla a maholo a sa thakhisehang 'me ke eona ntho e ka sehloohong bakeng sa liphahlo tse sa thulaneng. |
| Tshebetso ea ho sebetsa | Ho bonolo ho e sebetsa 'me e ka thehoa ka mekhoa e tloaelehileng e kang ente ea ente le extrusion. | Ho thata ho sebetsa 'me hangata ho hloka mekhoa e khethehileng ea ho sebetsa joalo ka sintering. |
| Botenya | Boima ba 1.75 g/cm³, e batlang e le bobebe. | Boima bo ka ba 2.15 g/cm³, e batlang e le boima. |
Ⅲ. Libaka tsa kopo
| Lisebelisoa | PVDF | PTFE |
| Indasteri ea lik'hemik'hale | E sebelisetsoa ho etsa liphaephe, li-valve, lipompo le lisebelisoa tse ling, tse loketseng ho sebetsana le maemo a acid kapa a alkaline. | E sebelisoa haholo ka linings, litiiso, liphaephe, joalo-joalo tsa lisebelisoa tsa lik'hemik'hale, tse loketseng libaka tse feteletseng tsa lik'hemik'hale. |
| Indasteri ea elektronike | E sebedisetsoa ho etsa matlo, li-insulation layers, joalo-joalo tsa likarolo tsa elektroniki, tse loketseng maemo a mahareng le a motlakase. | E sebelisetsoa ho etsa likarolo tsa insulating tsa lithapo tse phahameng-frequency le likhokahano tsa elektroniki, tse loketseng maqhubu a phahameng le maemo a phahameng a motlakase. |
| Indasteri ea mechine | E sebelisetsoa ho etsa likarolo tsa mochini, li-bearings, litiiso, joalo-joalo, tse loketseng maemo a mahareng le mocheso. | E sebelisetsoa ho etsa likarolo tse fokolang, litiiso, joalo-joalo, tse loketseng mocheso o phahameng le maemo a tlaase a khohlano. |
| Indasteri ea lijo le meriana | E sebelisetsoa ho etsa likarolo tsa lisebelisoa tsa ho lokisa lijo, li-linings tsa lisebelisoa tsa meriana, joalo-joalo, tse loketseng mocheso o mahareng le tikoloho ea lik'hemik'hale. | E sebelisetsoa ho etsa liphahlo tse se nang lithupa, mabanta a tsamaisang lijo, linings tsa thepa ea meriana, joalo-joalo, tse loketseng mocheso o phahameng le tikoloho e matla ea lik'hemik'hale. |
| Indasteri ea kaho | E sebelisetsoa ho etsa thepa ea ka ntle ea lerako la mohaho, thepa ea marulelo, joalo-joalo, e nang le khanyetso e ntle ea leholimo le aesthetics. | E sebelisetsoa ho etsa thepa ea ho tiisa mohaho, lisebelisoa tse sa keneleng metsi, joalo-joalo, tse loketseng maemo a feteletseng. |
Ⅳ. Litšenyehelo
PVDF: Theko e tlase haholo, e theko e tlase.
PTFE: Ka lebaka la theknoloji ea eona e khethehileng ea ts'ebetso le ts'ebetso e ntle haholo, litšenyehelo li phahame.
Ⅴ. Tšusumetso ea tikoloho
PVDF: Ho ka ’na ha ntšoa likhase tse seng kae tse kotsi ka mocheso o phahameng, empa phello e akaretsang ea tikoloho e nyenyane.
PTFE: Lintho tse kotsi tse kang perfluorooctanoic acid (PFOA) li ka lokolloa ka mocheso o phahameng, empa mekhoa ea morao-rao ea tlhahiso e fokolitse kotsi ena haholo.
Nako ea poso: May-09-2025