Polytetrafluoroethylene (polytetrafluoroethylene) ingangove ndiyo fluoropolymer inoshandiswa zvakanyanya nekuti ine hunhu hwakasiyana-siyana hunoita kuti ive chinhu chakakodzera kushandiswa kwakasiyana-siyana. Inochinjika kupfuura mamwe mapaipi akafanana uye inogona kuramba makemikari ese emaindasitiri.
Tembiricha yacho inosvika -330°F kusvika 500°F, zvichipa tembiricha yakakura pakati pemafluoropolymers. Pamusoro pezvo, ine hunhu hwakanaka hwemagetsi uye ine simba shoma remagineti. Ptfe tube ndiyo inoshandiswa zvakanyanya mumachubhu ekurabhoritari uye mashandisirwo ayo uko kuramba makemikari nekuchena kwakakosha.PTFEine coefficient yakaderera yekukweshana uye ndeimwe yezvinhu "zvinotsvedza" zvinozivikanwa
Zvimiro:
100% PTFE resin yakachena
Zvichienzaniswa neFEP, PFA, HP PFA, UHP PFA, ETFE, ECTFE, mapaipi efluoropolymer anochinjika zvakanyanya
Haina makemikari, haipindi makemikari ese emumaindasitiri uye zvinonyungudutsa
Tembiricha yakakura
Kupinda kwakaderera
Kupedzisa kwepasi kusina kunamira kwakapfava
Chiyero chekukweshana chakaderera
Kushanda zvakanaka kwemagetsi
Hazvibatike
Hazvina chepfu
Mashandisirwo:
rabhoritari
Maitiro emakemikari
Kuongorora nekushandisa michina
Kutarisa kubuda kwemhepo
Tembiricha yakaderera
tembiricha yepamusoro
Magetsi
ozone
Maumbirwo emamorekuru ePTFE
Polytetrafluoroethylene (PTFE) inogadzirwa nekuita kuti mamorekuru akawanda etetrafluoroethylene ave polymerization.
Dhayagiramu iri nyore rePTFE hariratidze chimiro chemorekuru chine mativi matatu. Mune molecular poly(ethylene) iri nyore, musana wekabhoni wemorekuru wakabatana chete nemaatomu ehydrogen, uye cheni iyi inochinjika-haisi morekuru yakatsetseka.
Zvisinei, mu polytetrafluoroethylene, atomu yefluorine iri muboka reCF2 yakakura zvakakwana kuti ivhiringidze atomu yefluorine iri muboka riri pedyo. Unofanira kuyeuka kuti atomu yega yega yefluorine ine maerekitironi matatu anobuda.
Mhedzisiro yeizvi ndeyekudzvinyirira kutenderera kwebhondi rimwe chete recarbon-carbon. Maatomu efluorine anowanzo kurongeka kuitira kuti ave kure zvakanyanya kubva kumaatomu efluorine ari pedyo. Kutenderera kunowanzo sanganisira kuroverana kwemaatomu efluorine ari pedyo nemaatomu ecarbon - izvo zvinoita kuti kutenderera kusashande zvakanaka.
Simba rinodzinga rinosunga molecule kuita chiumbwa chetsvimbo, uye maatomu efluorine akarongwa mudenderedzwa rakapfava—maatomu efluorine akarongwa mudenderedzwa akatenderedza musana wekabhoni. Mitsetse iyi yelead ichadzvanywa pamwe chete semapenzura marefu, matete mubhokisi.
Kubatana uku kwepedyo kune simba guru pamasimba epakati pemamorekuru, sezvamuchaona
Masimba epakati pemamorekuru uye nzvimbo yekunyunguduka kwePTFE
Pokunyunguduka kwepolytetrafluoroethylene kunoonekwa se327°C. Izvi zvakakwirira kwazvo kune iyi polymer, saka panofanira kunge paine masimba makuru evan der Waals pakati pemamorekuru.
Sei vanhu vachiti mauto eVan der Waals muPTFE haana simba?
Simba rekupararira kwevan der Waals rinokonzerwa nema dipoles anoshanduka-shanduka kwenguva pfupi anogadzirwa kana maerekitironi ari mumorekuru achifamba-famba. Nekuti molekyuru yePTFE yakakura, ungatarisira simba guru rekupararira nekuti kune maerekitironi akawanda anogona kufamba.
Mamiriro ezvinhu akajairika ndeekuti kana molekyuru yakakura, simba rekupararira rinokurawo.
Zvisinei, PTFE ine dambudziko. Fluorine haina simba remagetsi. Inowanzo sunga maerekitironi ari muchisungo checarbon-fluorine zvakasimba pamwe chete, zvekuti maerekitironi haakwanise kufamba sezvamunofunga. Tinotsanangura chisungo checarbon-fluorine sechisina polarization yakasimba.
Masimba eVan der Waals anosanganisirawo kudyidzana kwedipole-dipole. Asi mu polytetrafluoroethylene (PTFE), molekyuru yega yega yakakomberedzwa nechikamu chemaatomu efluorine ane charge shoma. Muchiitiko ichi, kudyidzana chete pakati pemamorekyuru kudzoserwa kwese!
Saka simba rekupararira harina simba kupfuura zvaunofunga, uye kudyidzana kwedipole-dipole kunokonzera kudzongonyedzwa. Hazvishamisi kuti vanhu vanoti simba revan der Waals muPTFE harina simba. Hauzowani simba rekudzongonyedzwa, nekuti simba rekupararira rakakura kupfuura rekudyidzana kwedipole-dipole, asi mhedzisiro ndeyekuti simba revan der Waals rinowanzo derera simba.
Asi PTFE ine poindi yakanyanya kunyunguduka, saka simba rinobata mamorekuru pamwe chete rinofanira kunge rakasimba kwazvo.
PTFE inogona sei kuva nenzvimbo yekunyunguduka yakanyanya?
PTFE yakashongedzwa zvikuru, nenzira iyi pane nzvimbo yakakura, mamorekuru ari muhurongwa hwakarongeka. Yeuka, mamorekuru ePTFE anogona kufungidzirwa sematanda marefu. Matanda aya achabatanidzwa pamwe chete.
Izvi zvinoreva kuti kunyange hazvo molekyuru yeptfe isingakwanise kugadzira dipoles dzakakura dzenguva pfupi, dipoles dzinogona kushandiswa zvinobudirira zvikuru.
Saka masimba eVan Der Waals muPTFE haana simba here kana kuti akasimba?
Ndinofunga kuti mese munogona kuva nekodzero! Kana cheni dze polytetrafluoroethylene (PTFE) dzakarongwa nenzira yekuti hapana kubatana kwakanyanya pakati pecheni, simba riri pakati padzo richave risina simba uye pokunyunguduka pachave pasi zvikuru.
Asi munyika chaiyo, mamorekuru ari pedyo. Masimba eVan der Waals angasave nesimba sezvaangave, asi chimiro chePTFE chinoreva kuti anonzwa mhedzisiro huru, achigadzira mabhondi akasimba pakati pemamorekuru uye nzvimbo dzakanyanya kunyunguduka.
Izvi zvakasiyana nemamwe masimba, akadai sesimba rekudyidzana re dipole-dipole, iro rinongoderedzwa ka23 chete, kana kaviri daro rinoderedzwa ka8.
Nokudaro, kurongedza kwakasimba kwemamorekuru akaita setsvimbo muPTFE kunowedzera kushanda kwekupararira
Zvimiro zvisinganamati
Ndosaka mvura nemafuta zvisinganamati pamusoro pePTFE, uye nei uchigona kugocha mazai mupani yakaputirwa nePTFE usinganamati papani.
Unofanira kufunga nezvemasimba api anogona kugadzirisa mamwe mamorekuru pamusoro pePTFEInogona kusanganisira imwe mhando yechisungo chemakemikari, simba revan der Waals kana chisungo chehydrogen
Kusungana kwemakemikari
Chisungo checarbon-fluorine chakasimba kwazvo, uye hazvigoneke kuti mamwe mamorekuru asvike pacheni yecarbon kuti zvikonzere kuti pave nekuchinjana kwechinhu. Hazvigoneki kuti chisungo chemakemikari chiitike.
mauto evan der Waals
Takaona kuti simba re van der Waals mu PTFE harina kusimba zvakanyanya, uye rinongoita kuti PTFE ive nenzvimbo yekunyunguduka kwakanyanya, nekuti mamorekuru ari padyo zvekuti ane kubatana kunobudirira.
Asi zvakasiyana kune mamwe mamorekuru ari pedyo nepamusoro pePTFE. Mamorekuru madiki (akadai semamorekuru emvura kana mamorekuru emafuta) anongosangana nepamusoro chete, uye huwandu hushoma hwevan der Waals huchagadzirwa.
Morekuru hombe (senge puroteni) haizove yakaita setsvimbo, saka hapana kubatana kwakakwana pakati payo nepamusoro kuti ikunde PTFE ine mukana wakaderera wekuparadzanisa.
Chero zvazvingava, simba revan der Waals riri pakati pePTFE nezvinhu zvakaripoteredza diki uye harishandi.
Zvisungo zvehydrogen
Mamorekuru ePTFE ari pamusoro akaputirwa nemaatomu efluorine. Aya maatomu efluorine ane electronegative zvakanyanya, saka ese ane mwero wakati wechaji isina kunaka. Fluorine yega yega ine mapeya matatu emaerekitironi ari kubuda.
Aya ndiwo mamiriro ezvinhu anodiwa pakuumbwa kwehydrogen bonds, senge lone pair pa fluorine ne hydrogen atomu mumvura. Asi zviri pachena kuti izvi hazvizoitiki, zvikasadaro pachava nekukwezvana kwakasimba pakati pemamorekuru ePTFE nemamorekuru emvura, uye mvura inonamira paPTFE.
Pfupiso
Hapana nzira inoshanda yekuti mamwe mamorekuru abatanidzwe zvakanaka pamusoro pePTFE, saka ine nzvimbo isinganamatire.
Kukweshana kwakaderera
Kukweshana kwePTFE kwakaderera zvikuru. Izvi zvinoreva kuti kana uine pamusoro pakafukidzwa neptfe, zvimwe zvinhu zvinotsvedza nyore nyore pairi.
Pazasi pane pfupiso yezviri kuitika. Izvi zvinobva mupepa ra1992 rainzi "Friction and Wear of Polytetrafluoroethylene".
Pakutanga kwekutsvedza, pamusoro pePTFE panotsemuka uye huremu hunoendeswa chero kwahunenge huchitsvedza. Izvi zvinoreva kuti pamusoro pePTFE pachapera.
Sezvo kutsvedza kwakaramba kuchienderera mberi, mabhuroko akapetana kuita zvidimbu zvitete.
Panguva imwe chete, pamusoro pePTFE panoburitswa kuti pave nechikamu chakarongeka.
Nzvimbo dzese dziri kusangana ikozvino dzine mamorekuru ePTFE akarongwa zvakanaka anogona kutsvedza pamusoro peimwe neimwe
Zviri pamusoro apa ndezvekutanga kwepolytetrafluoroethylene, polytetrafluoroethylene inogona kugadzirwa kuita zvigadzirwa zvakasiyana-siyana, isu tine hunyanzvi mukugadzira ptfe tube,vagadziri vepaipi yeptfe, tinokugamuchirai kuti mutaure nesu
Kutsvaga kwakabatana ne ptfe hose:
Nguva yekutumira: Chivabvu-05-2021