Iyini impahla ye-PVDF?
I-Polyvinylidene Fluoride (PVDF) iyinto esebenza kahle kakhulu esetshenziswa kakhulu ezimbonini zamakhemikhali nezokukhiqiza, futhi ithandwa kakhulu ukumelana namakhemikhali ayo, izakhiwo zikagesi namandla emishini. Kulesi sihloko, sizohlaziya ngokuningiliziwe ukuthi iyini i-PVDF, izakhiwo zayo, izinhlelo zokusebenza kanye nenqubo yokukhiqiza ukukusiza uqonde kangcono izinzuzo zalokhu kwaziswa.
Okokuqala, izici eziyisisekelo ze-PVDF
I-PVDF iyi-semi-crystalline thermoplastic fluoropolymer, ikakhulukazi i-polymerised kusuka ku-vinylidene fluoride (VDF) monomer. Ngenxa ye-electronegativity ephezulu ye-athomu ye-fluorine namandla ebhondi ye-CF, i-PVDF ibonisa lezi zakhiwo ezilandelayo:

Ukumelana namakhemikhali: I-PVDF imelana kakhulu nama-asidi amaningi, ama-alkali, usawoti kanye nezincibilikisi, okwenza izinze futhi imelane nokugqwala embonini yamakhemikhali ngokuhamba kwesikhathi.

Amandla Emishini: I-PVDF inamandla amahle kakhulu okuqina kanye nokumelana nomthelela, okuyenza ikwazi ukugcina ubuqotho bayo besakhiwo ezindaweni ezinokhahlo.

Izakhiwo zikagesi: Ngenxa yokungaguquguquki kwayo okuphansi kwe-dielectric kanye nezindawo zokuvikela eziphezulu, i-PVDF isetshenziswa kabanzi ezindaweni zikagesi neze-elekthronikhi, ikakhulukazi njengongqimba oluvikelayo lwezintambo nezintambo.

Ukuzinza kwe-thermal: I-PVDF inokusimama okuhle kokushisa futhi ingasetshenziswa ezinhlobonhlobo zamazinga okushisa, futhi ngokuvamile ingagcina izakhiwo zayo ezibonakalayo ezingeni lokushisa elingu -40°C kuya ku-150°C.

Okwesibili, inqubo yokukhiqiza ye-PVDF
Ukukhiqizwa kwe-PVDF kufezwa ngokuyinhloko nge-polymerisation yamahhala, ngokuvamile nge-polymerization yesisombululo noma i-suspension polymerisation. Enqubweni ye-polymerization, ama-VDF monomers enziwa i-polymers abe yi-PVDF polymer ngaphansi kwezimo ezithile zokusabela. Ngemva kwalokho, ngokusebenzisa uchungechunge lwezinqubo zangemuva kokwelashwa, okuhlanganisa ukuhlanzwa, ukukhishwa kanye ne-granulation, ukwakheka kokugcina kwemikhiqizo ye-PVDF enezakhiwo ezithile ezibonakalayo.
Okwesithathu, izindawo zokusebenza eziyinhloko ze-PVDF
I-PVDF isetshenziswe kabanzi ezimbonini eziningi ngenxa yokusebenza kwayo okuhle kakhulu:

Imboni yamakhemikhali: I-PVDF ivamise ukusetshenziswa ekwenzeni iziqukathi zamakhemikhali ezinhlobonhlobo, amapayipi namavalvu, ikakhulukazi ngesikhathi esihlanganisa amakhemikhali abolayo.

Imboni yezokwakha: I-PVDF isetshenziselwa ukwakhiwa kwezingubo ezisebenza kahle kakhulu, njengezingubo ze-fluorocarbon, ezisetshenziselwa ukuvikela izindonga zezakhiwo zangaphandle, futhi zingakwazi ukugcina ubuhle bezakhiwo isikhathi eside ngenxa ye-UV kanye nezindawo ezimelana nokuguga.

Imboni ye-elekthronikhi nekagesi: I-PVDF isetshenziswa kabanzi ekukhiqizeni izintambo, izixhumi kanye nama-diaphragms ebhethri ye-lithium ngenxa yokufakwa kwayo okuhle kukagesi nokumelana nokushisa.

Imboni yokwelapha amanzi: Izinto zokwakha ze-membrane ze-PVDF zisetshenziswa emkhakheni wokwelashwa kwamanzi, ikakhulukazi kuma-ultrafiltration kanye nama-nanofiltration membranes, athandwa ngenxa yokumelana kwawo namakhemikhali aphezulu kanye nokunemba okuphezulu kokuhlunga.

Okwesine, amathuba emakethe kanye nezinselelo ze-PVDF
Ngokusheshisa ukuthuthukiswa kwezimboni kanye nokwanda kwesidingo sezinto ezisebenza kahle, imakethe ye-PVDF ikhula ngokushesha.Izindleko zokukhiqiza eziphezulu kanye nobunzima benqubo yokukhiqiza ye-PVDF yenza intengo yayo yemakethe ibize kakhulu. Ukusetshenziswa kwe-PVDF nakho kubhekana nezinselelo ezithile ngenxa yezinkinga zayo zemvelo ezihlobene ne-fluoride. Ngakho-ke, ukwenza kahle inqubo yokukhiqiza kanye nokunciphisa umthelela wemvelo we-PVDF kuzoba ukhiye wentuthuko yesikhathi esizayo.
Isifinyezo
Iyini impahla ye-PVDF? Ngokuhlaziya okungenhla, singabona ukuthi i-PVDF iyimpahla ye-fluoropolymer esebenza kahle enezinhlobonhlobo zamathemba okusebenza. Ukumelana kwayo okuhle kakhulu namakhemikhali, amandla emishini, izakhiwo zikagesi kanye nokuzinza kokushisa kwenza kube nendima ebalulekile emikhakheni eminingi. Ngokuthuthukiswa kwezidingo zokuvikelwa kwemvelo, ukukhiqizwa nokusebenzisa i-PVDF kuzophinde kubhekane nezinselele namathuba amasha. Ukuqonda nokuphatha kahle izakhiwo kanye nokusetshenziswa kwe-PVDF kunganikeza ukwesekwa okubalulekile kokuqanjwa kabusha nokuthuthukiswa kwezimboni ezihlobene.