Izimiso Zokuklama Ze-Alumina Ceramic Membranes

Ama-membrane e-alumina ceramic, njengezinto eziphezulu-ezisebenza kahle zokuhlukanisa izinto ezingaphili, adizayinelwe ngokusekelwe ekuthuthukisweni okuhlanganisiwe kwesayensi yezinto ezibonakalayo, i-surface chemistry, nobuchwepheshe bokuhlukanisa, kuhloswe ukuthola ukukhetha okuphezulu, impilo ende, nokuzinza kwamakhemikhali okuhle kakhulu. Izimiso zedizayini eziyinhloko zizungeza ekwakhiweni kwezinto ezibonakalayo, ukulawulwa kwe-microstructure, nokusebenza kwendawo.

Okokuqala, i-substrate yolwelwesi lwe-alumina ceramic ngokuvamile iphezulu-ubumsulwa -i-Al₂O₃, ngenxa yokuqina kwayo okuhle kakhulu kokushisayo (iphoyinti lokuncibilika cishe elingu-2050℃), amandla okusebenza (ukuqina okuphezulu nokumelana nokukhasa), kanye nokungabi namandla kwamakhemikhali (ukumelana ne-asidi nokugqwala kwe-alkali). Ngokulawula inqubo ye-sintering (efana nezinga lokushisa, umkhathi, nesikhathi), usayizi wokusanhlamvu kanye ne-porosity kungalungiswa, ngaleyo ndlela kuthuthukiswe ukungeneka kwe-membrane kanye nezakhiwo zemishini. Isakhiwo esijwayelekile solwelwesi olunombobo lwe-alumina luqukethe isendlalelo sokusekela, isendlalelo soguquko, nosendlalelo sokuhlukanisa. Idizayini yezimbotshana ezisezingeni eliphezulu (enama-macropores kungqimba yokwesekwa enikeza ukusekela komshini nama-micropores kungqimba ehlukanisayo okuvumela ukuhlukana okuphumelelayo) ibalulekile.

Okwesibili, ukusatshalaliswa kosayizi wezimbotshana kanye nezakhiwo ezingaphezulu kuthonya ngqo ukuhlukanisa ukusebenza kahle. Ngezinqubo ezifana ne-sol-ijeli, i-anodic oxidation, noma i-hydrothermal synthesis, usayizi wembotshana ungalawuleka ngokunembile (0.01–10 μm), okuyenza ifanelekele ukucwenga okuncane, i-ultrafiltration, kanye ne-nanofiltration. Ukukhohlisa kokushaja okungaphezulu (okufana nokwethulwa kwamaqembu e-hydroxyl noma amaqembu asebenzayo) kungathuthukisa ukukhangiswa okukhethiwe kwama-ion noma ama-molecule athile, kuthuthukise ukunemba kokuhlukana. Ngaphezu kwalokho, izingqimba ze-alumina eziminyene ({6}}ezingenayo izimbobo noma ezinanoporous) zingasetshenziselwa ukuhlukanisa igesi noma{7}}ukuhlanza igesi yezinga lokushisa eliphezulu, kuncike ekungeneni kwazo okuphansi kakhulu nokukhetha okuphezulu.

Okokugcina, idizayini yolwelwesi lwe-alumina ceramic kufanele futhi icabangele indawo yangempela yohlelo lokusebenza, njengamazinga okushisa aphezulu, imidiya egqwala kakhulu, noma izimo zokucindezela okukhulu. I-Doping (efana ne-ZrO₂ ne-TiO₂) ingaqhubeka ithuthukise izakhiwo zemishini kanye nokuhambisana nokunwetshwa kokushisa, ngaleyo ndlela kwandise impilo yesevisi. Kafushane, ukuklanywa kwezingqimba ze-alumina ceramic kuwumphumela wokudidiyelwa kokwenziwa kwezinto, ukwakheka, nomsebenzi, okuhlinzeka ngezixazululo ezinokwethenjelwa zobuchwepheshe zokuhlukaniswa kwezimboni, ukuvikelwa kwemvelo, namandla.