PTFE xov xwmfeem ntau yog hais txog cov xov xwm ua los ntawm polytetrafluoroethylene (PTFE luv). Cov hauv qab no yog cov lus qhia ntxaws txog PTFE media:
Ⅰ. Cov khoom siv
1. Kev ruaj khov tshuaj lom neeg
PTFE yog ib yam khoom ruaj khov heev. Nws muaj zog tiv taus tshuaj lom neeg thiab tsis cuam tshuam rau yuav luag txhua yam tshuaj lom neeg. Piv txwv li, nyob rau hauv ib puag ncig ntawm cov kua qaub muaj zog (xws li sulfuric acid, nitric acid, thiab lwm yam), cov hauv paus muaj zog (xws li sodium hydroxide, thiab lwm yam) thiab ntau cov kuab tshuaj organic (xws li benzene, toluene, thiab lwm yam), cov ntaub ntawv PTFE yuav tsis teb tshuaj lom neeg. Qhov no ua rau nws nrov heev hauv cov ntawv thov xws li cov foob thiab cov yeeb nkab hauv kev lag luam tshuaj lom neeg thiab tshuaj, vim tias cov lag luam no feem ntau yuav tsum tau daws ntau yam tshuaj lom neeg nyuaj.
2. Kev kub tsis kam
PTFE media tuaj yeem ua haujlwm tau zoo hauv ntau qhov kub thiab txias. Nws tuaj yeem ua haujlwm li qub hauv qhov kub thiab txias ntawm -200 ℃ txog 260 ℃. Thaum kub qis, nws yuav tsis tawg yooj yim; thaum kub siab, nws yuav tsis lwj lossis deform yooj yim li qee cov yas ib txwm muaj. Qhov kev tiv thaiv kub zoo no ua rau PTFE media muaj kev siv tseem ceeb hauv aerospace, electronics thiab lwm yam teb. Piv txwv li, hauv lub tshuab hydraulic ntawm lub dav hlau, PTFE media tuaj yeem tiv taus qhov kub siab uas tsim los ntawm kev hloov pauv kub thiab kev ua haujlwm ntawm lub cev thaum lub sijhawm ya dav hlau.
3. Kev sib txhuam coefficient tsawg
PTFE muaj qhov sib txhuam coefficient qis heev, yog ib qho qis tshaj plaws ntawm cov khoom siv khov kho. Nws cov coefficient sib txhuam dynamic thiab static yog ob qho tib si me me heev, txog li 0.04. Qhov no ua rau PTFE dielectric zoo heev thaum siv ua lub roj nplua nyeem hauv cov khoom siv kho tshuab. Piv txwv li, hauv qee cov khoom siv kis tau tus mob, cov bearings lossis bushings ua los ntawm PTFE tuaj yeem txo qhov sib txhuam ntawm cov khoom siv kho tshuab, txo kev siv hluav taws xob, thiab ntev lub neej ua haujlwm ntawm cov khoom siv.
4. Kev rwb thaiv hluav taws xob
PTFE muaj cov khoom siv hluav taws xob zoo rwb thaiv tsev. Nws tswj tau qhov rwb thaiv tsev siab dhau ntau zaus. Hauv cov khoom siv hluav taws xob, PTFE dielectric tuaj yeem siv los ua cov ntaub ntawv rwb thaiv tsev, xws li cov txheej rwb thaiv tsev ntawm cov xov hlau thiab cov cables. Nws tuaj yeem tiv thaiv kev xau tam sim no, xyuas kom meej tias cov khoom siv hluav taws xob ua haujlwm li qub, thiab tiv taus kev cuam tshuam electromagnetic sab nraud.
Piv txwv li, hauv cov xov hlau sib txuas lus ceev ceev, cov txheej PTFE rwb thaiv tsev tuaj yeem ua kom muaj kev ruaj khov thiab raug ntawm kev xa xov tooj.
5. Tsis yog-stickiness
Qhov saum npoo ntawm PTFE dielectric muaj qhov tsis nplaum. Qhov no yog vim tias electronegativity ntawm fluorine atoms hauv PTFE molecular qauv yog siab heev, ua rau nws nyuaj rau PTFE nto kom sib txuas nrog lwm yam tshuaj. Qhov tsis nplaum no ua rau PTFE siv dav hauv cov txheej txheem rau cov khoom siv ua noj (xws li cov lauj kaub tsis nplaum). Thaum cov zaub mov siav hauv lub lauj kaub tsis nplaum, nws yuav tsis yooj yim lo rau ntawm phab ntsa lauj kaub, ua rau nws yooj yim dua los ntxuav thiab txo cov roj siv thaum ua noj.
Qhov txawv ntawm PVDF thiab PTFE yog dab tsi?
PVDF (polyvinylidene fluoride) thiab PTFE (polytetrafluoroethylene) yog ob qho tib si fluorinated polymers nrog ntau yam zoo sib xws, tab sis lawv kuj muaj qee qhov sib txawv tseem ceeb hauv cov qauv tshuaj lom neeg, kev ua tau zoo thiab kev siv. Cov hauv qab no yog lawv qhov sib txawv tseem ceeb:
Ⅰ. Cov qauv tshuaj lom neeg
PVDF:
Cov qauv tshuaj lom neeg yog CH2−CF2n, uas yog ib qho polymer semi-crystalline.
Cov saw hlau molecular muaj cov methylene (-CH2-) thiab trifluoromethyl (-CF2-) uas hloov pauv.
PTFE:
Cov qauv tshuaj lom neeg yog CF2−CF2n, uas yog ib qho perfluoropolymer.
Cov saw hlau molecular yog tsim los ntawm cov fluorine atoms thiab cov carbon atoms, tsis muaj hydrogen atoms.
Ⅱ. Kev sib piv kev ua tau zoo
| Cov Ntawv Qhia Txog Kev Ua Tau Zoo | PVDF | PTFE |
| Kev tiv thaiv tshuaj lom neeg | Zoo tiv taus tshuaj lom neeg, tab sis tsis zoo li PTFE. Zoo tiv taus feem ntau cov kua qaub, cov hauv paus thiab cov kuab tshuaj organic, tab sis tsis zoo tiv taus cov hauv paus muaj zog ntawm qhov kub siab. | Inert rau yuav luag txhua yam tshuaj lom neeg, tiv taus tshuaj lom neeg heev. |
| Kev tiv thaiv kub | Qhov kub ua haujlwm yog -40 ℃ ～ 150 ℃, thiab kev ua haujlwm yuav txo qis ntawm qhov kub siab. | Qhov kub ua haujlwm yog -200 ℃ ～ 260 ℃, thiab qhov kub tsis kam zoo heev. |
| Lub zog kho tshuab | Lub zog kho tshuab yog siab, nrog lub zog tensile zoo thiab kev cuam tshuam tsis kam. | Lub zog kho tshuab tsis tshua muaj zog, tab sis nws muaj kev ywj pheej zoo thiab tiv taus qaug zog. |
| Kev sib txhuam coefficient | Tus coefficient ntawm kev sib txhuam yog qis, tab sis siab dua PTFE. | Tus coefficient ntawm kev sib txhuam yog qis heev, yog ib qho ntawm qhov qis tshaj plaws ntawm cov ntaub ntawv khov kho. |
| Kev rwb thaiv hluav taws xob | Kev ua haujlwm rwb thaiv hluav taws xob zoo, tab sis tsis zoo li PTFE. | Qhov kev ua tau zoo ntawm kev rwb thaiv tsev hluav taws xob zoo heev, tsim nyog rau qhov chaw muaj zaus siab thiab qhov chaw muaj hluav taws xob siab. |
| Tsis nplaum | Qhov tsis nplaum yog qhov zoo, tab sis tsis zoo li PTFE. | Nws muaj zog heev uas tsis nplaum thiab yog cov khoom siv tseem ceeb rau cov txheej txheej tsis nplaum. |
| Kev ua tau zoo | Nws yooj yim rau kev ua thiab tuaj yeem tsim los ntawm cov txheej txheem ib txwm muaj xws li kev txhaj tshuaj molding thiab extrusion. | Nws nyuaj rau ua thiab feem ntau xav tau cov txheej txheem ua tshwj xeeb xws li sintering. |
| Qhov Ceev | Qhov ceev yog li ntawm 1.75 g / cm³, uas yog qhov sib dua. | Qhov ceev yog li ntawm 2.15 g / cm³, uas yog qhov hnyav heev. |
Ⅲ. Cov teb thov
| Cov ntawv thov | PVDF | PTFE |
| Kev lag luam tshuaj lom neeg | Siv los tsim cov kav dej, cov li qub, cov twj tso kua mis thiab lwm yam khoom siv uas tiv taus xeb, tshwj xeeb tshaj yog rau kev tswj hwm cov chaw acidic lossis alkaline. | Siv dav hauv cov ntaub, cov foob, cov kav dej, thiab lwm yam ntawm cov khoom siv tshuaj lom neeg, tsim nyog rau cov chaw muaj tshuaj lom neeg heev. |
| Kev lag luam hluav taws xob | Siv los tsim cov tsev nyob, cov txheej rwb thaiv tsev, thiab lwm yam ntawm cov khoom siv hluav taws xob, tsim rau qhov nruab nrab zaus thiab qhov hluav taws xob ib puag ncig. | Siv los tsim cov khoom siv rwb thaiv tsev ntawm cov xov hluav taws xob ntau zaus thiab cov khoom siv hluav taws xob, tsim nyog rau cov chaw muaj zaus ntau zaus thiab cov chaw muaj hluav taws xob ntau. |
| Kev lag luam tshuab | Siv los tsim cov khoom siv kho tshuab, bearings, seals, thiab lwm yam, tsim rau qhov nruab nrab load thiab qhov kub thiab txias. | Siv los tsim cov khoom sib txhuam tsawg, cov foob, thiab lwm yam, tsim nyog rau qhov kub thiab txias thiab qhov chaw sib txhuam tsawg. |
| Kev lag luam khoom noj thiab tshuaj | Siv los tsim cov khoom siv ua zaub mov, cov ntaub ntawm cov khoom siv tshuaj, thiab lwm yam, tsim nyog rau qhov kub thiab txias nruab nrab thiab cov chaw tshuaj lom neeg. | Siv los tsim cov txheej txheej uas tsis lo rau lub lauj kaub, cov siv thauj khoom noj, cov ntaub ntawm cov khoom siv tshuaj, thiab lwm yam, tsim nyog rau qhov kub thiab txias thiab cov chaw muaj tshuaj lom neeg muaj zog. |
| Kev lag luam tsim kho | Siv los tsim cov ntaub ntawv phab ntsa sab nraud, cov ntaub ntawv ru tsev, thiab lwm yam, nrog kev tiv taus huab cua zoo thiab zoo nkauj. | Siv los tsim cov ntaub ntawv kaw lub tsev, cov ntaub ntawv tiv dej, thiab lwm yam, tsim nyog rau cov chaw ib puag ncig hnyav. |
Ⅳ. Tus nqi
PVDF: Tus nqi qis dua, pheej yig dua.
PTFE: Vim nws cov thev naus laus zis ua haujlwm tshwj xeeb thiab kev ua tau zoo heev, tus nqi siab dua.
Ⅴ. Kev cuam tshuam rau ib puag ncig
PVDF: Tej zaum yuav muaj me ntsis cov pa phem uas yuav raug tso tawm thaum kub siab, tab sis qhov cuam tshuam rau ib puag ncig yog me me xwb.
PTFE: Cov tshuaj lom xws li perfluorooctanoic acid (PFOA) yuav raug tso tawm thaum kub siab, tab sis cov txheej txheem tsim khoom niaj hnub no tau txo qhov kev pheej hmoo no ntau heev.
Lub sijhawm tshaj tawm: Tsib Hlis-09-2025