Polytetrafluoroethylene (polytetrafluoroethylene) ishobora kuba ari yo fluoropolymer ikoreshwa cyane kuko ifite imiterere myinshi ituma iba ibikoresho byiza cyane mu bikorwa bitandukanye. Iroroshye kurusha indi miyoboro isa nayo kandi ishobora kurwanya imiti hafi ya yose ikoreshwa mu nganda.
Ubushyuhe buri hagati ya -330°F na 500°F, butanga ubushyuhe bwagutse cyane muri fluoropolymers. Byongeye kandi, ifite imiterere myiza y'amashanyarazi n'ubushobozi buke bwo kwinjira mu kirere. Ptfe tube ni yo ikoreshwa cyane muri laboratwari kandi ikoreshwa cyane aho kurwanya ubuziranenge n'ubuziranenge ari ngombwa.PTFEifite ubushobozi buke cyane bwo gukururana kandi ni kimwe mu bintu "binyerera" bizwi cyane
Ibiranga:
Resin ya PTFE 100% isukuye
Ugereranije na FEP, PFA, HP PFA, UHP PFA, ETFE, ECTFE, imiyoboro ya fluoropolymer yoroshye cyane
Nta kintu na kimwe kidakoreshwa mu bya shimi, kirwanya hafi imiti yose ikoreshwa mu nganda n'ibintu bishongesha
Ubushyuhe bwinshi
kwinjira bike
Irangi ryoroshye ritafatana
Igipimo cyo hasi cyane cyo gukururana
Imikorere myiza cyane y'amashanyarazi
Ntibishobora gushya
Ntibihumanya
Porogaramu:
Laboratwari
Uburyo bw'imiti
Ibikoresho byo gusesengura no gutunganya
Gukurikirana imyuka ihumanya
Ubushyuhe buri hasi
ubushyuhe bwinshi
Amashanyarazi
ozone
Imiterere ya molekile za PTFE
Polytetrafluoroethylene (PTFE) ikorwa na polymerization ya molekile nyinshi za tetrafluoroethylene
Iyi shusho yoroheje ya PTFE ntabwo igaragaza imiterere y'ibice bitatu bya molekile. Muri polyethylene yoroshye ya molekile, urufatiro rwa karuboni rwa molekile ruhuzwa gusa na atome za hydrogen, kandi uru ruhererekane rurahindagurika cyane - ntabwo rwose ari molekile igororotse.
Ariko, muri polytetrafluoroethylene, atome ya fluorine iri mu itsinda rya CF2 ni nini bihagije kugira ngo ivange atome ya fluorine iri mu itsinda riri hafi aho. Ugomba kwibuka ko buri atome ya fluorine ifite elektroni eshatu zisohoka.
Ingaruka z'ibi ni ukugabanya kuzenguruka kw'umugozi umwe wa karuboni na karuboni. Atome za fluorine zikunze kugaragara ku buryo ziba kure cyane y'atome za fluorine zegeranye. Kuzenguruka bikunze kubamo impanuka zombi hagati ya atome za fluorine kuri atome za karuboni zegeranye - ibyo bigatuma kuzenguruka kutagira imbaraga.
Imbaraga zitera ubwoba zifunga molekile mu ishusho y'inkoni, maze atome za fluorine zitondekwa mu buryo bworoshye cyane—atome za fluorine zitondekwa mu buryo bworoshye zikikije uruti rw'umugongo rwa karuboni. Utu duce tw'icyuma tuzashyirwa hamwe nk'amakaramu maremare, yoroheje mu gasanduku.
Iyi gahunda yo guhuza ibintu hafi ifite ingaruka zikomeye ku mbaraga z'ingirabuzimafatizo, nk'uko uzabibona
Imbaraga z'amakuru n'aho PTFE ishongesha
Ikigero cyo gushonga cya polytetrafluoroethylene kivugwa ko ari 327°C. Ibi ni byinshi cyane kuri iyi polymer, bityo hagomba kuba hari imbaraga nyinshi za van der Waals hagati ya molekile
Kuki abantu bavuga ko ingabo za van der Waals muri PTFE ari nke?
Imbaraga zo gutatanya van der Waals ziterwa na dipole zihindagurika by'igihe gito zikorwa iyo electron ziri muri molekile zizenguruka. Kubera ko molekile ya PTFE ari nini, wakwitega imbaraga nyinshi zo gutatanya kuko hari electron nyinshi zishobora kugenda.
Muri rusange, uko molekile iba nini, ni ko imbaraga zo gukwirakwiza ziba nyinshi
Ariko, PTFE ifite ikibazo. Fluorine ni electronegative cyane. Ikunda gufatanya electron ziri mu mugozi wa karuboni-fluorine neza cyane, ku buryo electron zidashobora kugenda nkuko ubyibwira. Dusobanura ko umugozi wa karuboni-fluorine udafite polarisation ikomeye.
Imbaraga za Van der Waals nazo zirimo imikoranire ya dipole na dipole. Ariko muri polytetrafluoroethylene (PTFE), buri molekyuli ikikijwe n'urwego rwa atome za fluorine zifite umuvuduko mubi. Muri iki gihe, imikoranire yonyine ishoboka hagati ya molekyuli ni ukwirukanana!
Rero imbaraga zo gutatanya zirakomeye kurusha uko ubitekereza, kandi imikoranire ya dipole-dipole izatera kwirukanwa. Ntibitangaje kuba abantu bavuga ko imbaraga za van der Waals muri PTFE ari nke cyane. Ntabwo mu by'ukuri uzabona imbaraga zo kwirukanwa, kuko ingaruka z'imbaraga zo gutatanya ziruta iz'imikoranire ya dipole-dipole, ariko ingaruka ni uko imbaraga za van der Waals zizacika intege.
Ariko PTFE ifite aho ishongesha cyane, bityo imbaraga zihuza molekile zigomba kuba zikomeye cyane
Ni gute PTFE ishobora kugira aho ishongera cyane?
PTFE ni kristu cyane, muri ubu buryo hari ahantu hanini, molekile ziri mu buryo busanzwe. Wibuke ko molekile za PTFE zishobora gufatwa nk'uduti turekure. Izi nkingi zizahurizwa hamwe cyane.
Ibi bivuze ko nubwo molekile ya ptfe idashobora gukora dipole nini cyane z'igihe gito, dipole zishobora gukoreshwa neza cyane
None se imbaraga za van der Waals muri PTFE zirakomeye cyangwa zirakomeye?
Ndatekereza ko mwembi mushobora kuba mufite ukuri! Iyo imiyoboro ya polytetrafluoroethylene (PTFE) itunganyijwe ku buryo nta miyoboro ihura cyane, imbaraga hagati yayo zizaba nke cyane kandi aho ishongesha hazaba hato cyane.
Ariko mu buzima busanzwe, molekile ziba zifatanye cyane. Imbaraga za Van der Waals zishobora kuba zidafite imbaraga nk'uko zishobora kuba zimeze, ariko imiterere ya PTFE bivuze ko zumva ingaruka nziza cyane, zigatanga imigozi ikomeye hagati ya molekile n'aho zishongesha cyane.
Ibi bitandukanye n'izindi mbaraga, nk'imbaraga zihuza dipole na dipole, zigabanukaho inshuro 23 gusa, cyangwa inshuro ebyiri intera igabanukaho inshuro 8.
Bityo rero, gupfunyika cyane kwa molekile zimeze nk'inkoni muri PTFE byongera imikorere myiza yo gukwirakwira
Imiterere idafatana
Iyi niyo mpamvu amazi n'amavuta bitafatana ku buso bwa PTFE, kandi niyo mpamvu ushobora gukaranga amagi mu isafuriya itwikiriwe na PTFE utiriwe ufatana ku isafuriya.
Ugomba gutekereza ku mbaraga zishobora gukoma imbere izindi molekile ku buso bwaPTFEBishobora kuba birimo ubwoko bw'imigozi y'ibinyabutabire, imbaraga za van der Waals cyangwa imigozi ya hydrogen
Guhuza imiti
Umugozi wa karuboni na fluorine urakomeye cyane, kandi ntibishoboka ko izindi molekile zigera ku mugozi wa karuboni ngo zitume habaho uburyo ubwo aribwo bwose bwo gusimbuza. Ntibishoboka ko umugozi wa shimi ubaho
ingabo za van der Waals
Twabonye ko imbaraga za van der Waals muri PTFE zidakomeye cyane, kandi bizatuma PTFE igira aho ishongera cyane, kuko molekile zegeranye cyane ku buryo zigira aho zihurira neza cyane.
Ariko biratandukanye ku zindi molekile zegereye ubuso bwa PTFE. Molekile nto (nk'amazi cyangwa molekile z'amavuta) zizaba zifite ingano nto gusa yo gukora ku buso, kandi hazabaho ingano nto gusa y'ibintu bikurura van der Waals.
Molekile nini (nk'iy'iporoteyine) ntabwo izaba ifite ishusho nk'iy'inkoni, bityo nta buryo buhagije bwo kuyihuza n'ubuso kugira ngo itsinde imiterere yo hasi ya PTFE.
Uko byagenda kose, imbaraga za van der Waals hagati y'ubuso bwa PTFE n'ibintu biyikikije ni nto kandi ntizigira ingaruka nziza.
Imigozi ya hydrogen
Molekile za PTFE ziri hejuru zipfunyitse neza na atome za fluorine. Izi atome za fluorine ni electronegative cyane, bityo zose zifite urwego runaka rwa charge negatif. Buri fluorine ifite kandi ama-electron atatu asohoka.
Ibi ni byo bisabwa kugira ngo habeho imigozi ya hydrogen, nk'itsinda ry'ibintu bibiri kuri fluorine na atome ya hydrogen mu mazi. Ariko ibi biragaragara ko bitazabaho, bitabaye ibyo hazabaho gukururana gukomeye hagati ya molekile za PTFE na molekile z'amazi, maze amazi agafatana na PTFE.
Incamake
Nta buryo bwiza bwo gufata neza izindi molekile ku buso bwa PTFE, bityo ikaba ifite ubuso budafatana
Ubushyuhe buke
Igipimo cy'ubushyuhe bwa PTFE kiri hasi cyane. Ibi bivuze ko niba ufite ubuso butwikiriwe na ptfe, ibindi bintu bizayigwaho byoroshye.
Dore incamake y'ibiri kuba. Ibi bituruka ku nyandiko yo mu 1992 yitwa "Friction and Wear of Polytetrafluoroethylene".
Mu ntangiriro yo kunyerera, ubuso bwa PTFE buracika maze uburemere bukimurwa aho buri kunyerera. Ibi bivuze ko ubuso bwa PTFE buzashira.
Uko kugenda gukomeye byakomeje, amabati yahindutse uduce duto.
Muri icyo gihe, ubuso bwa PTFE burakurwamo kugira ngo bukore urwego ruteguye neza.
Ubuso bwombi bukoranaho ubu bufite molekile za PTFE ziteguye neza zishobora kunyererana
Ibivuzwe haruguru ni ukwinjizwa kwa polytetrafluoroethylene, polytetrafluoroethylene ishobora gukorwamo ibintu bitandukanye, twihariye mu gukora umuyoboro wa ptfe、abakora imiyoboro ya ptfeMurakaza neza kugira ngo mudufashe kuvugana natwe
Ubushakashatsi bujyanye n'umuyoboro wa ptfe:
Igihe cyo kohereza: Gicurasi-05-2021