Raws li cov ntsiab lus tseem ceeb hauv kev sib cais ntawm daim nyias nyias, lub hollow fiber ultrafiltration membrane cov yam ntxwv thev naus laus zis los ntawm nws cov qauv tsim tshwj xeeb thiab kev sib sib zog nqus ntawm cov khoom siv, ua kom pom qhov tsis zoo hauv cov xwm txheej xws li kua purification thiab cov peev txheej rov qab.
Raws li cov qauv, hollow fibers tsim tus kheej - txhawb nqa tubular zoo nrog ib txoj kab uas hla ntawm qib micrometer. Ib qho fiber ntau tuaj yeem ua ib qho kev pom kev ywj pheej, thiab cov micropores ntom ntom (0.01-}0.1μm hauv txoj kab uas hla) ntawm cov phab ntsa membrane tsim ib qho kev xaiv barrier. Qhov txiaj ntsig tseem ceeb ntawm qhov kev teeb tsa no yog nyob rau hauv nws qhov chaw siab tshwj xeeb - thaj chaw pom ntawm ib chav tsev ntim ntawm daim nyias nyias tuaj yeem ncav cuag ntau txhiab square meters, deb tshaj li cov tsoos tiaj tus - ntawv los yog kauv- cov ntaub so ntswg, ua rau cov cuab yeej siv ntau dua thiab txhim kho qhov chaw siv rau tib lub peev xwm ua haujlwm. Tib lub sijhawm, tus kheej txhawb nqa tus yam ntxwv ntawm hollow fibers ua kom yooj yim rau cov txheej txheem ntim khoom, txo qhov chaw tuag hauv cov dej ntws, txo qis kev ua haujlwm, thiab nteg lub hauv paus rau cov dej ntws siab.
Nyob rau hauv cov nqe lus ntawm kev sib cais kev ua tau zoo, nws qhov pore loj yog qhov tseeb tswj tau, khaws cov kab mob zoo, colloids, cov organic molecules loj, thiab cov khoom raug tshem tawm, thaum nthuav tawm cov permeability zoo heev rau cov dej thiab cov kua dej me me, ua tiav qhov sib npaug ntawm cov khoom sib npaug ntawm cov khoom -kev sib cais ntawm cov kua thiab cov tshuaj molecular{1}. Cov khoom xaiv endows nws nrog zoo tshuaj stability thiab kub kuj; polymers xws li polysulfone thiab polyethersulfone tuaj yeem tiv taus qee yam ntawm acid thiab alkali tej yam kev mob thiab kub variations, thaum cov ntaub ntawv ceramic yog zoo suited rau siab - kub thiab heev corrosive ib puag ncig, nthuav nws daim ntawv thov ciam teb.
Kev lag luam kev lag luam kuj yog qhov tseem ceeb. Hollow fiber ntau tuaj yeem ua haujlwm ntawm chav tsev kub yam tsis muaj theem hloov lub zog tawm tswv yim, uas ua rau muaj kev siv zog tsawg dua li cov txheej txheem ib txwm muaj xws li evaporation thiab distillation. Nws cov tshuaj tiv thaiv kev hloov kho tshuab (xws li hydrophilic coatings) tuaj yeem ncua cov pa phem adhesion, thiab ua ke nrog cov txheej txheem tsim dua tshiab xws li rov qab ntxuav thiab tshuaj ntxuav, cov txheej txheem membrane tuaj yeem rov siv dua, txo tag nrho cov nqi ntawm lub neej. Tsis tas li ntawd, cov txheej txheem membrane ua rau tsis muaj kev ua qias tuaj, thiab cov dej ntws zoo yog ruaj khov, ua tau raws li cov kev cai ntawm kev tsim ntsuab.
Los ntawm cov qauv compactness mus rau kev sib cais precision, los ntawm cov khoom adaptability mus rau kev lag luam kev lag luam, cov yam ntxwv ntawm hollow fiber ultrafiltration membranes ua rau lawv cov kev daws teeb meem nyob rau hauv niaj hnub kev sib cais engineering uas sib npaug efficiency thiab sustainability, tsis tu ncua tsav tsheb txawj tej yam ntxiv nyob rau hauv cov teb xws li dej kho mob, zaub mov thiab tshuaj, thiab bioengineering.
