Pab pawg tshawb fawb coj los ntawm Xibfwb Wan Yinhua los ntawm Lub Tsev Haujlwm Txheej Txheem Txheej Txheem ntawm Suav Academy ntawm Kev Tshawb Fawb tau tsim hom tshiab ntawm cov dej-permeability acid-resistant nanofiltration (NF) membrane rau kev kho tau zoo ntawm cov kua qaub. Kev tshawb fawb tau luam tawm hauv Phau Ntawv Xov Xwm ntawm Tshuaj Engineering thaum Lub Yim Hli 14.
NF yog lub zog txuag hluav taws xob thiab ib puag ncig zoo rau kev kho dej khib nyiab thiab kev sib cais thev naus laus zis. Txawm li cas los xij, vim yog hydrolysis ntawm amide bonds, feem ntau muaj kev lag luam muaj polyamide NF daim nyias nyias qhia txog kev ruaj ntseg qis hauv cov kua qaub muaj zog.
Hauv txoj kev tshawb fawb no, cov kws tshawb fawb tau npaj cov kua qaub-tiv taus NF daim nyias nyias nrog cov txheej txheej sib cais tau yooj yim raws qhov yooj yim qhib kev pab cuam, txheej txheem txheej txheem sib cuam tshuam polymerization (IP).
Hauv cov tswv yim no, tus nqi qis tus nqi aqueous monomer tshiab (3-aminobenzenesulfonamide, ABSA) tau siv los tawm tsam nrog trimesoyl chloride (TMC) los npaj cov poly (amide-sulfonamide) (PASA) txheej nruab nrab, thiab tom qab ntawd ua kom lub ntsej muag tiav. Thaum kawg, txheej PASA tsis muaj teeb meem sab saud tau tsim ntawm txheej nruab nrab.
ABSA' tus qauv ruaj khov sulfonamide tuaj yeem tiv thaiv cov kua qaub ncaj qha. Qhov tseem ceeb, raws li tus naj npawb ntawm txheej PASA tau nce ntxiv, zaj duab xis nthuav tawm qhov ua tau zoo dua thiab xaiv tau ntau dua, feem ntau vim tias cov ntsiab lus monomer siab dua tuaj yeem ua rau txheej txheem IP thiab tshem tawm qhov ntau ntawm ABSA thiab TMC cov tshuaj tiv thaiv.
Qhov txaus siab, vim yog hydrolysis ntawm PASA txheej tshiab tsim thaum lub sijhawm txheej txheem txheej txheej, txheej txheej PASA ua kom nruab nrab ua kom pom cov dej ntau ntxiv hydrophilicity, du thiab electronegativity, uas tuaj yeem txhawb nqa tom ntej IP cov tshuaj tiv thaiv tsim nrog siab dua permeability thiab Tsis muaj kev sib cais sib cais txheej ntawm ntsev yog tsis lees txais
Tau txais txiaj ntsig los ntawm qhov muaj txiaj ntsig tsis suav nrog qhov loj me, daim nyias nyias nthuav tawm qhov zoo tshaj plaws cov xim khaws cia nyob rau hauv cov kua qaub thiab qhov ua tau zoo rau kev ua kom zoo dua qub ntawm cov xim tiag tiag tshem tawm cov dej khib nyiab. Ib qho ntxiv, nws tseem tuaj yeem nthuav tawm cov kua qaub zoo heev nrog rau kev ua tau zoo ntawm cov tshuaj tua kab mob thiab kev ruaj ntseg mus sij hawm ntev.
Txoj haujlwm no muab cov tswv yim tus nqi qis rau kev txhim kho permeability thiab muaj peev xwm tiv thaiv cov kua qaub-resistant NF daim nyias nyias. Nws tau cia siab tias yuav siv los kho cov dej tsis huv hauv cov khoom lag luam textile thiab ua zaub mov noj.