Polytetrafluoroethylene, cyangwa PTFE, ni ibintu bisanzwe bikoreshwa cyane mubikorwa hafi yinganda zose.Iyi ultra-lubricious and-use-fluoropolymer ikora kuri buri wese kuva mu kirere no mu nganda zitwara ibinyabiziga (nk'igifuniko gikingira kuri cabling) kugeza kubungabunga ibikoresho bya muzika (iboneka mu muringa wa peteroli ya valve n'ibikoresho byo mu biti byo gukoresha mu bice byimuka).Birashoboka ko imikoreshereze yacyo izwi cyane ikoreshwa nkubuso butari inkoni kumasafuriya.PTFE irashobora gukorwa mubice bibumbabumbwe;ikoreshwa nkibikoresho byoroshye guhuza imiyoboro, imibiri ya valve, insulator zikoresha amashanyarazi, ibyuma, nibikoresho;kandi bisohoka nka tubing.
Kurwanya imiti ikabije hamwe nubusembure bwimiti, hamwe nuburemere bworoshye nyamara bukomeye bwa PTFE, bituma bugira akamaro kanini mugukora no gukoresha ibikoresho byubuvuzi.Kuberako coefficient nkeya idasanzwe yo guterana amagambo (nuburyo bwo kubara bwo kuvuga ko ubuso butanyerera),PTFE tubingIrashobora gukoreshwa mu kwimura imiti ikaze cyangwa ibikoresho byubuvuzi bifite isuku bigomba kubungabungwa kandi bikenera kunyura mumubiri mugihe cyo kubagwa.PTFE tubing irasiga amavuta, iroroshye kandi yoroheje kuburyo itunganijwe neza kugirango iyobore indangamuntu ya catheter (imbere ya diameter) aho ibikoresho nka stent, imipira, aterectomie, cyangwa ibikoresho bya angioplasti bigomba kunyerera mubwisanzure nta terabwoba ryibisambo cyangwa inzitizi.Kuberako ntakintu gifatika kuri ibi bintu, kirashobora kandi kubangamira ubushobozi bwa bagiteri nizindi miti zanduza kwifata no gutera indwara zanduye mubitaro.
Ibi byose biranga ibiranga PTFE bivuze ko hafi ya byose bihujwe nibindi.Niba ikoreshwa nk'igifuniko, nk'igipapuro gifunga kashe, cyangwa nk'igituba hamwe n'amakoti ya Pebax hamwe na ferrule ihuza plastike, birashoboka cyane ko igomba gukurikiza ikindi kintu.Ushobora kuba wabonye ibyo tumaze kuvuga: ntakintu gifatika kuri PTFE.Imiterere ituma ibi bikoresho bikurura ibigo byubuvuzi nabyo bikunda guteza ibibazo byinganda mugihe cyo guteza imbere ibicuruzwa no kubyaza umusaruro.Kubona impuzu, elastomers, nibindi bikoresho bigize ibikoresho kugirango ukurikize PTFE biragoye bidasanzwe kandi bisaba kugenzura inzira zikomeye.
None, nigute abakora ibicuruzwa bakora ibi bintu bikoreshwa cyane, bidasubirwaho?Nigute bamenya ko byafashwe cyangwa byateguwe neza kandi mubyukuri byiteguye guhambira cyangwa ikoti?
Akamaro ko Gutera Imiti PTFE
Kugirango usobanure impamvu imiti yimiti ikenewe, birakenewe gusobanukirwa niki gitera PTFE kubura ubucuti.PTFE igizwe na chimique ihamye cyane, ituma bigorana kwinjira mubindi byose, ndetse mugihe gito.
Kubera ko PTFE idafite imiti, bivuze ko ubuso butitabira na molekile iyo ari yo yose ihura nayo, haba mu kirere cyangwa ku buso bw’ibindi bikoresho, ubuso bwayo bugomba guhindurwa mu buryo bwa shimi kugira ngo buhuze na cabling, ibyuma, cyangwa igituba kirimo gukoreshwa.
Gufatanya kwose ni uburyo bwa chimique aho hejuru ya 1-5 ya molekulire yo hejuru yubuso ikorana nimiti igaragara hejuru ya 1-5 ya molekile ya top ya hejuru yubuso ubwo aribwo bwose ikoreshwa kuri yo.Kubwibyo, ubuso bwa PTFE bugomba gukorwa muburyo bwa chimique bitandukanye na chimique inert kugirango ihuze neza.Muri siyansi yubumenyi, ubuso butitabira cyane kandi bushishikajwe no guhuza izindi molekile byitwa "ubuso bukomeye."PTFE rero igomba gukurwa muburyo bwa "ingufu nke", aribwo shingiro ryayo, kugirango "imbaraga nyinshi," ubuziranenge.
Hariho inzira nkeya zo kubikora, harimo kuvura vacuum plasma, kandi hari bamwe bavuga ko bashobora kugera kubuso bufatika kuri PTFE kumusenyi, gukuramo, cyangwa gukoresha primers zagenewe PVC cyangwa polyolefine.Nyamara, uburyo busanzwe kandi bwemejwe na siyansi ni inzira yitwa chimique etching.
Etching isenya bimwe mubice bya karubone-fluor ya PTFE (igizwe na fluoropolymers), mubyukuri, guhindura imiterere yimiti yakarere kegeranye, ikayikura mubutaka bwa inert ikajya mubikorwa bikora kandi bigashobora guhuza imiti nibindi bintu. .Ubuso bwavuyemo ntibusiga amavuta ariko ubu ni ubuso bushobora gufatanwa, kubumbabumbwa, cyangwa guhuzwa nibindi bikoresho, kimwe no kubyemerera gucapwa cyangwa gushushanya.
Etching ikorwa mugushyira PTFE mumuti wa sodium, nkibisanzwe Tetra Etch.Imiti ivamo hamwe nubuso ikuraho molekile ya fluor mumugongo wa karubone-fluor ya floropolymer usize atome ya karubone ibura electron.Ubuso bumaze gushya bufite ingufu nyinshi cyane, kandi iyo ihuye numwuka, molekile ya ogisijeni, umwuka wamazi, na hydrogène yemerewe kuguruka kugirango ifate umwanya wa molekile ya fluor, bituma electron zisubirana.Ubu buryo bwo gusana butera firime ikora ya molekile hejuru ituma ifatana.
Kimwe mu bintu bikomeye byerekeranye no gufata imiti ni uko ibasha guhindura gusa ibice bike byo hejuru bya molekile hanyuma igasiga PTFE isigaye idahwitse hamwe nibintu byihariye byihariye.
Nigute Wokwemeza Guhuza Ibikorwa bya Shimi.
Ibintu nyamukuru bya PTFE bikomeza kuba bimwe kuva imiti yimiti igira ingaruka gusa hejuru ya molekile yo hejuru.Ariko, harashobora kuba ibara ryijimye cyangwa ryijimye kuri tubing.Guhindura amabara ntabwo bisa nkaho bihuye nuburyo ubuso bufitanye isano, ntukoreshe rero ibara nkikimenyetso cyerekana uburyo PTFE yari yubatswe neza.
Inzira nziza yo kumenya ko etching yawe yaremye ubwoko bwubuso ukurikiraho ni ugukoresha uburyo abanyamurwango bose babigize umwuga bakoresha: gupima amazi angana.Ubu buhanga bukorwa mugushyira igitonyanga cyamazi meza cyane kuri PTFE no gupima uko icyo gitonyanga cyitwara.Igitonyanga gito gishobora kuba kinini kuko gikururwa ubwacyo kuruta PTFE, cyangwa "kizahinduka" kandi kiringaniye hejuru kuko gikurura PTFE.Mubisanzwe, nukuvuga neza imiti ya chimique - munsi yo guhuza impande (, gushimisha igitonyanga) bizaba.Ibi bikunze kuvugwa nko kugerageza "wettability" yubuso kuko, mubyukuri, niba ubuso bwarashizweho neza kandi igitonyanga cyamazi kigakwirakwira, igice kinini cyubutaka kiba gitose.
Ishushohejuruyerekana hejuru-hasi kureba igitonyanga cyamazi (imbere yimpeta ntoya yumuhondo nubururu) kuri PTFE tubing mbere yuko irimburwa. Nkuko mubibona, inkombe yigitonyanga ikora inguni ya dogere 95 hamwe nubuso bwa itiyo.
Ishusho hejuru irerekana igitonyanga cyamazi gishyizwe kumuyoboro wa PTFE nyuma yo gushiramo.Urashobora kubwira ko igitonyanga cyakwirakwiriye hejuru yigituba kuko impeta yumuhondo nubururu nini.Ibi bivuze ko igitonyanga kirimo gukora impande zo hasi zifatika hamwe nubuso bwa tubing.Kandi iyo upimye iyo mfuruka hamwe nigikoresho cya Surface Analyseur, ayo mashusho yombi yakuweho, tubona ko, yego, inguni ni dogere 38.Niba ibyo byujuje ibyateganijwe mbere yumubare dukeneye gukubita kugirango tumenye neza ko uyu muyoboro uhuza, noneho tumaze kwemeza ko ubuso bwashizweho bihagije.
Kugirango ukoreshe neza ikoreshwa ryikigereranyo cyamazi, ni ngombwa gukorana na Surface Scientist kugirango wumve icyerekezo cyiza cyo kugeraho nyuma ya etch yawe.Ibi biragufasha kubaka uburyo buteganijwe bwo guhuza bishingiye kubisobanuro bifatika.Kuberako niba uzi ko ukeneye gukora ubuso bufite aho bugarukira, noneho umenye ko mugihe ubikora, adhesion yawe izagenda neza.
Byongeye kandi, kugirango habeho uburyo bunoze bwo gutobora, ni ngombwa gufata igipimo cyo guhuza amazi mbere yo guterana.Kubona isuzuma ryibanze ryisuku bigufasha kumenya neza ibipimo bya etch bigomba kuba kugirango ugere kubisabwa kugirango ubone aho uhurira.
Komeza Etch yawe
Kubika neza PTFE ni ngombwa kugirango inzira igende neza.Kubika no kubara ni Ikintu gikomeye cyo kugenzura (CCP).Izi CCP ziri ahantu hose mubikorwa byose aho ubuso bwibintu bufite amahirwe yo guhinduka, kubwiza cyangwa kuburwayi, kandi wenda utabishaka.Ububiko CCP ni ingenzi cyane kuri PTFE kuko ubuso bushya bwogejwe mumiti burahinduka kuburyo ikintu cyose gihuye nacyo gishobora guhindura no gutesha agaciro akazi kawe.
Imyitozo myiza yo kubika PTFE post-etch ni ugukoresha ibipaki byumwimerere byageze niba bishoboka.Niba ibyo bitaboneka, noneho UV-guhagarika imifuka nibindi byiza.Komeza PTFE kure yumwuka nubushuhe bushoboka bwose, kandi mbere yo kugerageza kubihuza, menya neza ko ufata ibipimo bifatika kugirango umenye neza ko byakomeje ubushobozi bwo guhuza.
PTFE ni ibikoresho bidasanzwe hamwe na porogaramu zitabarika, ariko kugirango tubone byinshi muri byo, bigomba kuba byashizwemo imiti hanyuma bigahuzwa mubihe byinshi.Kugirango ibi bikorwe bihagije, ikizamini cyunvikana kumihindagurikire yimiti hejuru igomba gukoreshwa.Umufatanyabikorwa hamwe numuhanga wibikoresho wunvise inzira yawe yo gukora kugirango uhindure etch yawe kandi ushire mubikorwa mubikorwa byawe.
Igihe cyo kohereza: Nyakanga-17-2023