Kev ua tau zoo ntawm hollow fiber ultrafiltration membranes cia siab rau kev tshawb fawb muaj pes tsawg leeg thiab kev tswj cov txheej txheem meej. Lub ntsiab lus ntawm nws txoj kev npaj yog los hloov cov ntaub ntawv polymeric rau hauv hollow fiber morphology nrog cov pore loj faib thiab cov yam ntxwv sib cais, thiab kom ntseeg tau cov qauv kev ruaj ntseg thiab kev ua haujlwm tau zoo los ntawm ntau- kauj ruam tswj.
Kev npaj yog feem ntau raws li cov kev daws teeb meem polymer, siv cov theem inversion raws li cov txheej txheem tseem ceeb. Ua ntej, cov polymer uas tau xaiv yog yaj nyob rau hauv ib tug haum hnyav los tsim ib homogeneous casting tov, thiab tsim nyog additives yog ntxiv rau kho viscosity thiab porosity. Tom qab ntawd, lub hollow fiber qauv yog tsim los ntawm extrusion los ntawm ib tug spinneret, thiab theem sib cais tshwm sim nyob rau hauv ib tug tshwj xeeb gel da dej, tso cai rau hnyav thiab tsis yog - solvent exchange, txhawb polymer solidification thiab tsim ib tug microporous qauv. Qhov kub, concentration, txaus tus nqi, thiab gelation tej yam kev mob nyob rau theem no ncaj qha cuam tshuam lub fiber puab txoj kab uas hla, phab ntsa thickness, thiab pore loj uniformity, uas yog ib qho tseem ceeb rau kev txiav txim siab sib cais qhov tseeb thiab flux.
Txhawm rau txhim kho kev ua tau zoo, kev kho kev hloov kho feem ntau ua tom qab tsim cov membrane. Qhov kev hloov kho hydrophilic yog ib txoj hauv kev, ua tiav los ntawm kev kho ntshav plasma, UV grafting, los yog txheej nrog hydrophilic coatings, kom txo tau cov kab mob adhesion thiab txhim kho lub peev xwm antifouling. Rau cov ntawv thov uas xav tau cov tshuaj tshwj xeeb lossis qhov kub thiab txias, nanoparticles lossis huab cua -cov khoom siv tshuaj tiv thaiv tuaj yeem nkag mus rau hauv cov tshuaj spinning los tsim cov qauv sib xyaw thiab txhim kho tag nrho cov kav ntev.
Cov khoom sib dhos kuj yog ib feem tseem ceeb ntawm cov txheej txheem. Ib tug loj tus naj npawb ntawm cov hollow fibers yog encapsulated nyob rau hauv ib lub plhaub ntawm ib tug tshwj xeeb ceev thiab kev npaj, nrog rau ob xaus kaw nrog resin thiab inlet ports muab, tsim ib tug modular unit. A reasonable packing density and flow channel design can balance hydraulic distribution, reduce concentration polarization, and thus maintain long-term high-flux operation.
Zuag qhia tag nrho, txoj kev muaj pes tsawg leeg ntawm hollow fiber ultrafiltration membranes integrates cov ntaub ntawv science, spinning engineering, thiab interface tswj. Los ntawm kev tswj hwm qhov tsis sib xws ntawm txhua kauj ruam, kev ua kom zoo ntawm cov qauv thiab kev ua tau zoo yog tiav, tso lub hauv paus ruaj khov rau lawv daim ntawv thov ruaj khov thiab siv tau zoo hauv kev kho dej, zaub mov, thiab chaw muag tshuaj.
