Imidiya ye-PTFEngokuvamile kubhekisela ku-media eyenziwe nge-polytetrafluoroethylene (i-PTFE ngamafuphi). Okulandelayo isingeniso esiningiliziwe ku-media ye-PTFE:
Ⅰ. Izakhiwo zezinto ezibonakalayo
1. Ukuqina kwamakhemikhali
I-PTFE iyinto eqinile kakhulu. Inokumelana okunamandla kwamakhemikhali futhi ayisebenzi cishe kuwo wonke amakhemikhali. Isibonelo, endaweni yama-asidi aqinile (njenge-sulfuric acid, i-nitric acid, njll.), izisekelo eziqinile (njenge-sodium hydroxide, njll.) kanye nezinyibilikisi eziningi eziphilayo (njenge-benzene, i-toluene, njll.), izinto ze-PTFE ngeke zisabele ngamakhemikhali. Lokhu kuyenza ithandwe kakhulu ezisetshenziswayo njengezivalo kanye nezintambo zamapayipi embonini yamakhemikhali neyemithi, ngoba lezi zimboni zivame ukubhekana namakhemikhali ahlukahlukene ayinkimbinkimbi.
2. Ukumelana nokushisa
Imidiya ye-PTFE ingagcina ukusebenza kwayo ebangeni elibanzi lokushisa. Ingasebenza ngokujwayelekile ebangeni lokushisa eliphakathi kuka-200℃ no-260℃. Emazingeni okushisa aphansi, ngeke iqhekeke; emazingeni okushisa aphezulu, ngeke ibole noma iguquguquke kalula njengepulasitiki evamile. Lokhu kumelana okuhle nokushisa kwenza imidiya ye-PTFE ibe nokusetshenziswa okubalulekile ezindizayo, kuma-elekthronikhi nakwamanye amasimu. Isibonelo, ohlelweni lwe-hydraulic lwendiza, imidiya ye-PTFE ingamelana nokushisa okuphezulu okubangelwa izinguquko zokushisa okuzungezile kanye nokusebenza kohlelo ngesikhathi sokundiza.
3. Isilinganiso sokungqubuzana esiphansi
I-PTFE ine-coefficient ephansi kakhulu yokungqubuzana, enye yezinto eziqinile ezaziwayo. Ama-coefficient ayo aguquguqukayo kanye naqinile okungqubuzana kokubili mancane kakhulu, angaba ngu-0.04. Lokhu kwenza i-PTFE dielectric isebenze kahle kakhulu uma isetshenziswa njenge-lubricant ezingxenyeni zemishini. Isibonelo, kwamanye amadivayisi okudlulisa imishini, ama-bearings noma ama-bushing enziwe nge-PTFE anganciphisa ukungqubuzana phakathi kwezingxenye zemishini, anciphise ukusetshenziswa kwamandla, futhi andise impilo yesevisi yemishini.
4. Ukufakwa kukagesi
I-PTFE inezakhiwo ezinhle zokuvikela ugesi. Igcina ukumelana okuphezulu kokuvikela ugesi ebangeni elibanzi lemvamisa. Emishinini kagesi, i-PTFE dielectric ingasetshenziswa ukwenza izinto zokuvikela ugesi, njengongqimba lokuvikela ugesi lwezintambo nezintambo. Ingavimbela ukuvuza kwamanje, iqinisekise ukusebenza okuvamile kwemishini kagesi, futhi imelane nokuphazamiseka kwe-electromagnetic yangaphandle.
Isibonelo, ezintanjeni zokuxhumana ezisheshayo, ungqimba lokufakwa kwe-PTFE lungaqinisekisa ukuzinza nokunemba kokudluliswa kwesignali.
5. Ukunganamatheli
Ubuso be-PTFE dielectric abunamatheli kakhulu. Lokhu kungenxa yokuthi i-electronegativity yama-athomu e-fluorine esakhiweni sama-molecule e-PTFE iphakeme kakhulu, okwenza kube nzima ukuthi ubuso be-PTFE buhlangane ngamakhemikhali nezinye izinto. Lokhu kunganamatheli kwenza i-PTFE isetshenziswe kabanzi ekumbozweni kwezinto zokupheka (njengezimbiza ezinganamatheli). Uma ukudla kuphekwa epanini elinganamatheli, ngeke kunamathele kalula odongeni lwepani, okwenza kube lula ukuhlanza nokunciphisa inani lamafutha asetshenziswa ngesikhathi sokupheka.
Uyini umehluko phakathi kwe-PVDF ne-PTFE?
I-PVDF (i-polyvinylidene fluoride) kanye ne-PTFE (i-polytetrafluoroethylene) zombili ziyi-polymers ezifakwe i-fluorinated ezinezakhiwo eziningi ezifanayo, kodwa futhi zinomehluko omkhulu ekwakhiweni kwamakhemikhali, ukusebenza kanye nokusetshenziswa. Lokhu okulandelayo umehluko wazo oyinhloko:
Ⅰ. Isakhiwo samakhemikhali
I-PVDF:
Isakhiwo samakhemikhali yi-CH2−CF2n, okuyi-polymer eyi-semi-crystalline.
Uchungechunge lwama-molecule luqukethe amayunithi ashintshanayo e-methylene (-CH2-) kanye ne-trifluoromethyl (-CF2-).
I-PTFE:
Isakhiwo samakhemikhali yi-CF2−CF2n, okuyi-perfluoropolymer.
Uchungechunge lwama-molecule lwakhiwe ngokuphelele ngama-athomu e-fluorine nama-athomu e-carbon, ngaphandle kwama-athomu e-hydrogen.
Ⅱ. Ukuqhathaniswa kokusebenza
| Inkomba Yokusebenza | I-PVDF | I-PTFE |
| Ukumelana namakhemikhali | Ukumelana okuhle kwamakhemikhali, kodwa hhayi okuhle njenge-PTFE. Ukumelana okuhle nama-asidi amaningi, izisekelo kanye nezinyibilikisi eziphilayo, kodwa ukumelana okubi nezisekelo ezinamandla emazingeni okushisa aphezulu. | Ayisebenzi cishe kuwo wonke amakhemikhali, imelana kakhulu namakhemikhali. |
| Ukumelana nokushisa | Ububanzi bokushisa bokusebenza bungu--40℃～150℃, futhi ukusebenza kuzokwehla emazingeni okushisa aphezulu. | Ububanzi bokushisa bokusebenza bungu-200℃ ~ 260℃, futhi ukumelana nokushisa kuhle kakhulu. |
| Amandla omshini | Amandla omshini aphezulu, anamandla amahle okubamba kanye nokumelana nokushayisana. | Amandla omshini aphansi kakhulu, kodwa anokuguquguquka okuhle kanye nokumelana nokukhathala. |
| I-coefficient yokushayisana | I-coefficient yokungqubuzana iphansi, kodwa iphakeme kune-PTFE. | I-coefficient yokungqubuzana iphansi kakhulu, ingenye yezinto eziphansi kakhulu phakathi kwezinto eziqinile ezaziwayo. |
| Ukushisa ngogesi | Ukusebenza kokuvikela ugesi kuhle, kodwa akukuhle njenge-PTFE. | Ukusebenza kokuvikela ugesi kuhle kakhulu, kufaneleka ezindaweni ezivame kakhulu nezinamandla aphezulu. |
| Ukunganamatheli | Ukunganamatheli kuhle, kodwa akukuhle njenge-PTFE. | Inamandla kakhulu okunganamatheli futhi iyinto eyinhloko yokugqoka amapani anganamatheli. |
| Ukucutshungulwa | Kulula ukuyicubungula futhi ingakhiwa ngezindlela ezivamile ezifana nokubumba ngemijovo kanye nokukhipha. | Kunzima ukukucubungula futhi ngokuvamile kudinga amasu akhethekile okucubungula njengokuhlanza. |
| Ubuningi | Ubuningi bungaba ngu-1.75 g/cm³, okuwukukhanya okuncane. | Ubuningi bungaba ngu-2.15 g/cm³, okuyinto enzima kakhulu. |
Ⅲ. Izinkambu zohlelo lokusebenza
| Izicelo | I-PVDF | I-PTFE |
| Imboni yamakhemikhali | Isetshenziselwa ukukhiqiza amapayipi, amavalvu, amaphampu kanye neminye imishini engagqwali, efanelekile kakhulu ekuphatheni izindawo ezine-asidi noma i-alkaline. | Isetshenziswa kabanzi ezindongeni, ezivalweni, emapayipini, njll. zemishini yamakhemikhali, ifanelekela izindawo eziyingozi kakhulu zamakhemikhali. |
| Imboni ye-elekthronikhi | Isetshenziselwa ukukhiqiza izindlu, izendlalelo zokushisa, njll. zezingxenye ze-elekthronikhi, ezifanelekela izindawo ezivamile kanye ne-voltage. | Isetshenziselwa ukukhiqiza izingxenye zokuvikela ugesi zezintambo ezisebenzisa imvamisa ephezulu kanye nezixhumi ze-elekthronikhi, ezifanelekela izindawo ezisebenzisa imvamisa ephezulu kanye nezingamandla aphezulu. |
| Imboni yemishini | Isetshenziselwa ukukhiqiza izingxenye zemishini, amabheringi, izivalo, njll., ezifanelekela izindawo ezinomthwalo ophakathi nendawo kanye nezimo zokushisa. | Isetshenziselwa ukukhiqiza izingxenye ezingasebenzi kahle, izivalo, njll., ezifanele izindawo zokushisa okuphezulu kanye nezimo ezingasebenzi kahle. |
| Imboni yokudla kanye nemithi | Isetshenziselwa ukukhiqiza izingxenye zemishini yokucubungula ukudla, ulwelwesi lwemishini yemithi, njll., efanelekile ezindaweni ezinokushisa okuphakathi nendawo kanye namakhemikhali. | Isetshenziselwa ukukhiqiza izembozo zepani ezinganamatheli, amabhande okuhambisa ukudla, izinhlaka zemishini yezokwelapha, njll., ezifanele izindawo ezinokushisa okuphezulu kanye namakhemikhali aqinile. |
| Imboni yokwakha | Isetshenziselwa ukukhiqiza izinto zokwakha zangaphandle zodonga, izinto zokuphahla, njll., ezinokumelana nesimo sezulu esihle kanye nobuhle obuhle. | Isetshenziselwa ukukhiqiza izinto zokuvala izakhiwo, izinto ezingangeni manzi, njll., ezifanelekela izindawo ezibucayi kakhulu. |
Ⅳ. Izindleko
I-PVDF: Intengo iphansi kakhulu, ingabizi kakhulu.
I-PTFE: Ngenxa yobuchwepheshe bayo obukhethekile bokucubungula kanye nokusebenza okuhle kakhulu, izindleko ziphakeme.
Ⅴ. Umthelela wezemvelo
I-PVDF: Inani elincane lamagesi ayingozi lingakhishwa emazingeni okushisa aphezulu, kodwa umthelela jikelele wemvelo mncane.
I-PTFE: Izinto eziyingozi njenge-perfluorooctanoic acid (PFOA) zingase zikhishwe emazingeni okushisa aphezulu, kodwa izinqubo zokukhiqiza zanamuhla ziye zanciphisa kakhulu le ngozi.
Isikhathi sokuthunyelwe: Meyi-09-2025