I-PTFE imelana kakhulu ngamakhemikhali nokugqwala kune-PVDF noma i-PE.Lapho ama-athomu e-Fluorine engeziwe emhlane, amaprotheni amaningi ngeke akwazi ukunamathela phezulu ngamakhemikhali.
Umehluko omkhulu phakathi kwe-PTFE ne-PVDF
| I-polymer | I-PVDF | I-PTFE |
| Isakhiwo | –[–CF2–CHF–]n– | –[–CF2–CF2]n– |
| Ubuchwepheshe bokukhiqiza | futha | ukucindezela kwe-isostatic okushisayo noma okubandayo kanye/noma ukucwilisa |
| Ukusetshenziswa kwama-Catalysts kanye/noma Okunye Izengezo | Cd, Ba, K | Lutho |
| Inani | Kuphakathi | Phezulu |
| Ukuminyana [g/cm3] | 1.8 | 2.1 kuye ku-2.3 |
| Iphoyinti lokuncibilika [°C] | 178 | 327 |
| Ibanga Lezinga lokushisa Lokusebenza [°C] | - 60-150 | -200 kuya ku-260 |
| Amandla Okuqina | 50 | 20 ku35 |
| Ukumelana Kwamakhemikhali | Ayikho enye idatha etholakalayo;efana ne-PTFE | Iyingqayizivele.Ayikwazi ukuvutha futhi ayinakuxazululeka kuzo zonke izincibilikisi ezaziwayo.Ihlaselwa kuphela yizinsimbi ze-alkali ezincibilikisiwe kanye ne-fluorine emazingeni okushisa aphezulu. |
I-PTFE kanye ne-PVDF (durapore) zombili zisetshenziswa kulwelwesi lwesihlungi esibopha amaprotheni (Millipore ngokuqondile).Uma sikhuluma ngamakhemikhali la mapholymeri amabili ahluka kakhulu ngenxa yokwengeziwe kwe-fluoride nesisindo samangqamuzana.Izakhiwo zabo zokubopha amaprotheni nazo ziyahluka.
Ngokujwayelekile, i-PTFE 'ayinanti' kune-PVDF, engeyona intonga kune-polyethylene (PE).I-PTFE imelana kakhulu ngamakhemikhali nokugqwala kune-PVDF noma i-PE.Uqinisile uma ubheka ukwakheka kwamakhemikhali.Lapho ama-athomu e-Fluorine engeziwe emhlane, amaprotheni amaningi ngeke akwazi ukunamathela phezulu ngamakhemikhali.Ukulinganisa izinto ezifana ne-engeli yokuxhumana kuzoqinisekisa lokhu.Angazi ukuthi ukwakheka kwembotshana yolwelwesi kuzithinta kangakanani izinto, kodwa ngokombono wamakhemikhali, kunomehluko ocacile.
I-PTFE -poly tetra fluoro ethylene kanye ne-PVDF -polyvinylidene fluoride womabili angama-polymers asetshenziselwa indawo ye-hydrophobic ye-electrode ukugwema ukugcwala kwe-cathode material(carbon cloth).Ikakhulukazi ezifundweni, zisebenzisa isixazululo se-PTFE kunezinye izinhlobo zesixazululo...
Zombili zizinzile ngokwanele.Cabanga ukuthi isizathu sise-electrode morphology yokugcina, ngoba i-PVDF binder isetshenziswa njengesixazululo sangempela (glue), kuyilapho i-PTFE eyodwa iyisigxivizo esinezinhlayiya ezingancibiliki nanosized.
I-PVDF iyasebenza kakhulu kune-PTFE ngaphansi kwezimo ezithile.
PS: Uma ufuna isampula noma ulwazi olwengeziwe mayelana ne-PTFE induku ebunjiwe vs PTFE extruded rod, PTFE tubing, PTFE hose, kanye PTFE imishini, sicela usithinte.
Isikhathi sokuthumela: Nov-10-2019