I-PVDF (i-Polyvinylidene Fluoride): Izakhiwo, Izicelo, Nokukhiqiza

I-Polyvinylidene fluoride (PVDF) iyi-fluoropolymer esebenza kahle kakhulu enenani lokumelana namakhemikhali, amandla emishini, ukuzinza kwe-thermal, kanye nokuhlanzeka okuphezulu. Isetshenziswa kabanzi lapho amapulasitiki ajwayelekile ehluleka khona: ukucutshungulwa kwamakhemikhali, ukukhiqizwa kwe-semiconductor, amasistimu emithi, nokwelashwa kwamanzi. Lo mhlahlandlela uchaza ukuthi iyini i-PVDF, izici zayo ezibalulekile, ukuthi yenziwa kanjani, isetshenziswa kuphi, kanye nendlela yokukhetha amapayipi e-PVDF, okokufakwayo namavalvu.

Iyini i-PVDF?

I-PVDF imele i-polyvinylidene fluoride, ebuye ibhalwe i-polyvinylidene difluoride. I-semi-crystalline thermoplastic fluoropolymer eyenziwe nge-polymerizing vinylidene fluoride (VDF), enefomula (CH₂–CF₂)n. Ngokungafani ne-PTFE, i-PVDF ingakhishwa futhi ibunjwe ngomjovo ngezindlela ezivamile ze-thermoplastic, ngakho-ke ingenziwa ibe amapayipi, okokufakwayo, amavalvu, kanye nezingxenye eziyinkimbinkimbi. Inikeza ibhalansi eqinile yokumelana namakhemikhali, amandla emishini, kanye nokucutshungulwa.

I-PVDF vs PVF: Ukusula Ukudideka

Abathengi abaningi bafuna 'i-polyvinyl fluoride (PVDF)', kodwa amagama amabili achaza izinto ezihlukene. I-PVDF iyi-polyvinylidene fluoride. I-Polyvinyl fluoride (PVF) iyi-polymer ehlukile eyenziwe nge-vinyl fluoride futhi isetshenziswa kakhulu kumafilimu amancane okuvikela. Uma udinga amapayipi, okokufaka, amavalvu, noma ishidi lesevisi yamakhemikhali, cishe ufuna i-PVDF.

Izici ezibalulekile ze-PVDF

Ukumelana Kwamakhemikhali

I-PVDF imelana nama-acid amaningi amaminerali, ama-halogen, ama-oxidizing agents, ama-hydrocarbon, ama-alcohol, nezinyibilikisi ezinama-halogenated. Imikhawulo yayo eyaziwayo i-sulfuric acid egxilile egxilile kanye nama-amine ashisayo, futhi incibilika kuzincibilikisi ze-aprotic eziphothuliwe njenge-NMP, i-DMF, ne-DMSO. Njalo hlola ishadi elihambisanayo lendawo yakho, ukugxilisa ingqondo, nezinga lokushisa.

Ukusebenza Okushisayo

I-PVDF ivamise ukukalwa ngesevisi eqhubekayo ukusuka ku-20 °C ukuya ku-140 °C, ephakeme kune-PVC, i-CPVC, ne-polypropylene. Akumele ivezwe emlilweni noma ishiswe ngokwedlulele ngale kwebanga layo lokucubungula, ngoba ukubola kukhipha intuthu enobuthi equkethe i-fluorine.

Amandla Emishini Nokumelana Nokugqoka

I-PVDF iqinile futhi ayivumi ukuhujwa, imelana kahle nengcindezi yokukhathala nokugeleza kwamakhaza. Iyazicisha ngokwayo, futhi inenkomba ye-oxygen elinganiselwe (LOI) engaba ngu-44%.

Ukuhlanzeka Okuphezulu kanye Nokumelana ne-UV

Izinto ezikhishwayo eziphansi kanye nendawo ebushelelezi kwenza i-PVDF ibe ukukhetha okujwayelekile koketshezi olunamandla. Umgogodla wayo we-carbon-fluorine nawo umelana nemisebe ye-UV kanye nesimo sezulu, ngakho usebenza kahle ngaphandle.

Amanani ayahluka ngokwezinga nomkhiqizi, ngakho-ke waqinisekise ngokumelene nedatha yedatha yomkhiqizo ohlela ukuwuthenga.

Izinhlobo namaBanga e-PVDF

I-homopolymer ye-PVDF inikeza ubucwebe obuphakeme kakhulu, amandla, nokumelana namakhemikhali, futhi iyinketho evamile yamapayipi namathuluzi amakhemikhali. Ama-copolymers, ngokuvamile ane-HFP noma i-CTFE, avumelana nezimo futhi ahambisana nocingo, ikhebula, namashubhu. Amabanga abuye ahluke ngokuncibilika kwe-viscosity, isisindo samangqamuzana, nokuhlanzeka, kusukela kumabanga ezimboni ajwayelekile ukuya kumamaki ahlanzekile okusetshenziswa kwe-semiconductor.

Ikhiqizwa Kanjani I-PVDF?

I-PVDF yenziwe nge-free-radical polymerization ye-VDF monomer, ngokumiswa noma i-emulsion, futhi inikezwa njengempushana noma ama-pellets. Ngemuva kwalokho i-resin iguqulwa:

• I-Extrusion: ikhiqiza amapayipi, amashubhu, izinduku, amashidi, namafilimu. Izinto ezisetshenziswayo kufanele zigweme izindawo ezifile lapho inhlaka encibilikisiwe inganyakaza futhi yonakale.

• Ukubumba umjovo: kukhiqiza okokufakwayo, imizimba yama-valve, nezindlu. Amazinga okushisa ancibilika acishe abe ngu-200–270 °C ajwayelekile, futhi ukwakheka kwesikhunta kufanele kuvumele ukuncipha cishe ngo-3-4%.

• Ukubumba kokucindezelwa, impushana, nokucubungula isixazululo: kusetshenziselwa ama-linings, ama-coatings, nama-membrane.

Izicelo ze-PVDF

Ngaphandle kwamapayipi, ingxube engavamile ye-PVDF yokuzinza kwamakhemikhali, ukucutshungulwa, nokuziphatha kukagesi kuvule ukusetshenziswa kwezinga lezinto ezibonakalayo. Ukuze uthole izinhlelo zokusebenza zamapayipi ezifana nokudoswa kwamakhemikhali, amanzi angcolile, nemigqa yokuhlanzeka okuphezulu, bona umhlahlandlela wethu Liyini Ipayipi le-PVDF?

Amabhethri e-Lithium-ion

I-PVDF iyisibophezelo se-polymer esiphezulu sama-electrode ekukhiqizeni ibhethri ye-lithium-ion. Ibopha izinto ezisebenzayo kahle futhi ivuvukale kancane ku-electrolyte. I-resin yezinga lebhethri inokuhlanzeka okuqinile kanye nokucaciswa kosayizi wezinhlayiyana kunamabanga ezimboni.

Amamembrane Okuhlunga

Ama-membrane e-PVDF asetshenziswa ku-microfiltration kanye nokuhlunga amanzi ukuze kuhlanzwe amanzi, ukuhluzwa kwemithi, nomsebenzi we-biotech, okubaluleke kakhulu ukuqina kwamakhemikhali kanye ne-porosity elawulekayo.

I-Architectural Coatings

Izembatho ezisekelwe ku-PVDF ekuhlanganisweni kwensimbi zimelana ne-UV, ukufiphala, nokuchaki, futhi zivame ukuhlanganiswa nama-acrylic resins. Izimpilo zesevisi zikalwa emashumini eminyaka.

Ukufakwa kwentambo nekhebula

I-PVDF nama-copolymers ayo avala ucingo nekhebuli okufanele ihlale ivumelana nezimo futhi imelane nokushisa, amakhemikhali, namalangabi.

Izinzwa kanye namafilimu e-Piezoelectric

Esigabeni sayo esingu-β i-PVDF ikhiqiza inkokhiso ngaphansi kwengcindezi noma ukushisa, ngakho-ke isetshenziswa kuzinzwa eziguquguqukayo, ama-transducer, namadivayisi wokuvuna amandla.

Ukucubungula Amakhemikhali Nokuhlanzeka Okuphezulu

I-PVDF iphinde isetshenziselwe amaphampu, amalayini ethangi, kanye nezingxenye zokubamba uketshezi kumakhemikhali, ama-semiconductor, amakhemisi, nezindawo zokuhlanza amanzi. Amabanga ahlanzekile aphatha amanzi ahlanzekile ezitshalweni ze-semiconductor, amanzi asezingeni lekhemisi (okuhlanganisa namanzi omjovo), kanye namanzi enziwe i-deionized lab yokuhlaziya, futhi angakwazi ukuphatha i-ozone, amanzi ashisayo, nemidiya yokubulala amagciwane.

Amapayipi e-PVDF, okokufakwayo, kanye nama-Valves

Ipayipi liyindlela yemboni eyaziwa kakhulu ye-PVDF. Ukuze uthole umhlahlandlela womthengi wepayipi le-PVDF, okuhlanganisa ukuhambisana kwamakhemikhali, imikhawulo yezinga lokushisa, nokuqhathanisa ne-PVC, i-PPH, nepayipi lensimbi, funda Liyini Ipayipi le-PVDF?

Ikhava yobubanzi be-PVDF kaHuasheng Amapayipi e-PVDF, Ukufakwa kwe-PVDF , kanye Ama-valve e-PVDF . Ukufakwa ngokuvamile kufaka phakathi izindololwane, ama-tee, izinciphisi, izinyunyana, nama-flange, kuyilapho ama-valve elawula uketshezi olubolayo noluhlanzeke kakhulu.

Izindlela Zokujoyina

Amasistimu e-PVDF ajwayele ukujoyinwa ngokuhlanganisa izinqe, i-socket fusion, i-infrared welding, noma ukuxhumana okune-flanged. Ibanga le-PVDF-UHP likaHuasheng lisebenzisa i-infrared welding kuya kuzinga le-DVS 2207-6. Landela imingcele yokushisela yomkhiqizi, njengoba amalunga ampofu angumthombo ovamile wokuvuza.

Ungamkhetha Kanjani Umhlinzeki Wamapayipi we-PVDF

Ngaphambi koku-oda, qinisekisa i-medium, i-concentration, izinga lokushisa lokusebenza nengcindezi, izidingo zokuhlanzeka, kanye nendlela yokujoyina. Cela umhlinzeki ngemininingwane yedatha, izilinganiso zokucindezela, nemihlahlandlela yokushisela.

I-Huasheng ihlinzeka ngamapayipi e-PVDF, okokufakwayo, nama-valve, kanye ne-PFA, i-PVC, i-CPVC, i-PPH, nezinhlelo zamapayipi e-PE kanye nesevisi ye-OEM, ukuze amaphrojekthi wezinto ezixubile athathwe kumhlinzeki oyedwa.

Kuhlelo lwe-semiconductor, elekhemisi, kanye ne-ultrapure yamanzi, uhla lwe-PVDF-UHP lwe-Huasheng lwenziwe nge-PVDF engenisiwe emsulwa kakhulu. Izinto zokufakwa nama-valve ziyabunjwa ngomjovo futhi ipayipi liyakhishwa. Ukukhiqizwa kwenzeka ekamelweni elihlanzekile le-ISO 14644-1 Lekilasi 7, kuyilapho ukuhlanganisa, ukuhlolwa kwekhwalithi, nokuhlanza amanzi ahlanzekile okungu-18 MΩ kwenziwa egumbini elihlanzekile Lekilasi 5. Ubulukhuni bangaphakathi bungu-Ra ≤ 0.35 µm wezingxenye ezibunjwe ngomjovo kanye no-Ra ≤ 0.25 µm wepayipi elikhishwe. Wonke umkhiqizo uphethe umaka unomphela onenombolo yeqoqo, okokusebenza, usayizi, kanye nesilinganiso sokucindezela ukuze ukwazi ukulandeleka, futhi ukuhlola kuhlanganisa ukuhlolwa okubonakalayo, ukubekezelela kobukhulu, ukuhlola ingcindezi, nokuhlolwa kwemvula ezikhathini ezithile ngokuya nge-SEMI F40/F57.

I-PVDF Imibuzo Evame Ukubuzwa

Ingabe i-PVDF iyafana ne-polyvinyl fluoride (PVF)?

Cha. I-PVF yenziwe nge-vinyl fluoride. I-PVDF yenziwe nge-vinylidene fluoride.

Ingakanani izinga lokushisa eliphezulu le-PVDF?

Ngokujwayelekile ukusuka ku -20 °C ukuya ku-140 °C isevisi eqhubekayo, kuye ngebanga, ingcindezi, nendawo yamakhemikhali.

Yimaphi amakhemikhali ahlasela i-PVDF?

I-sulfuric acid egxilile egxilile, ama-amine ashisayo, nezincibilikisi ze-polar aprotic ezifana ne-NMP, i-DMF, ne-DMSO.

I-PVDF vs PTFE: iyiphi okufanele ngiyikhethe?

I-PTFE ayisebenzi futhi imelana nokushisa, kodwa i-PVDF inamandla futhi kulula ukuyicubungula nokushisela, okuyenza ibe yinketho engokoqobo yamapayipi amaningi.

Ingabe i-PVDF ingagaywa kabusha?

Yebo, ingancibilika futhi icutshungulwe kabusha, nakuba izinketho zokuqoqwa zilinganiselwe.

Isiphetho

I-PVDF ihlanganisa ukumelana namakhemikhali, ukuzinza kokushisa, amandla, nokuhlanzeka, yingakho ithatha indawo yamapulasitiki avamile ezinhlelweni ezifunayo. Ingabe ufuna amapayipi e-PVDF, okokufakwayo, noma ama-valve? Cela isampula , phequlula ku- Ikhathalogi ye-E , noma xhumana no-Huasheng ukuze uthole ikhotheshini.