Cov tshuaj uas muaj neeg ua haujlwm muaj ntau yam siv nyob rau ntau yam kev lag luam nrog kev tsim kho nrog kev tsim kho, chaw muag tshuaj thiab khoom noj. Kev tsim qauv ether yog qhov nyuaj heev, koom nrog ntau cov kauj ruam, thiab yuav tsum muaj kev tshaj lij thiab cov khoom siv tshwj xeeb. Hauv tsab xov xwm no, peb yuav tham txog cov kev nthuav dav ntawm cov kev ua cellulose.
Thawj kauj ruam nyob rau hauv lub cellulose ether manufacturing txheej txheem yog kev npaj ntawm cov ntaub ntawv raw. Cov ntaub ntawv raw siv los ua cov neeg muaj kev pab cuam ntawm cellulose feem ntau yog los ntawm ntoo pulp thiab pov cov paj rwb. Cov ntoo hauv av yog shredded thiab tshuaj ntsuam kom tshem tawm cov khib nyiab loj, thaum cov paj rwb tau ua tiav rau hauv lub puab tsaig kom zoo. Lub pulp yog tom qab ntawd txo qhov loj me los ntawm kev sib tsoo kom tau txais hmoov zoo. Hmoov ntoo ntoo thiab khib paj rwb yog tom qab sib xyaw ua ke nyob rau hauv cov proported nyob ntawm cov khoom xav tau ntawm cov khoom kawg.
Cov kauj ruam tom ntej muaj cov khoom siv ntawm cov khoom noj sib xyaw. Lub sam xauv nees yog thawj zaug kho nrog kev daws teeb meem alkaline (feem ntau sodium hydroxide) kom tawg cov qauv fibrous ntawm cellulose. Lub txiaj ntsig cellulose yog tom qab tau kho nrog cov kuab tshuaj xws li cov roj carbon disulfide los tsim xanthate canthate canthate. Qhov kev kho no yog nqa tawm hauv kev tso tsheb hlau luam nrog kev ua haujlwm txuas ntxiv ntawm pulp. Lub cellulose xantulose xanthate kev daws teeb meem yog tom qab ntawd extruded los ntawm kev rho tawm khoom siv los ua cov filaments.
Tom qab, lub cellulose xalthate filaments tau spun hauv da dej muaj dilute sulfuric acid. Qhov no ua rau regenereration ntawm lub cellulose Xantej, ua cov cellulose fibers. Tom qab no cellulose cellulose tau tsim los nrog dej kom tshem tawm cov impurities ua ntej yog bleached. Cov txheej txheem ua kom dawb siv hydrogen peroxide rau whiten lub cellulose lub cellulose fibulose, uas yog tom qab ntawd ntxuav nrog dej thiab sab laug kom qhuav.
Tom qab cov cellulose fibulose tau qhuav, lawv yauv ua txheej txheem hu ua etherification. Lub etherification cov txheej txheem suav nrog kev qhia txog cov pab pawg Etaws, xws li methyl, ilroxyethyl pab pawg, mus rau hauv cellulose. Cov txheej txheem yog nqa tawm siv cov tshuaj tiv thaiv ntawm tus neeg sawv cev ntawm lub nroog thiab cov kua qaub cov kua qaub nyob hauv lub xub ntiag ntawm cov kuab tshuaj. Cov tshuaj tiv thaiv feem ntau nqa tawm hauv qab cov kev tswj kom zoo ntawm qhov kub thiab lub siab kom ntseeg tau cov khoom lag luam siab thiab muaj kev coj dawb huv.
Nyob rau lub sijhawm no, lub cellulose ether yog nyob rau hauv daim ntawv ntawm cov hmoov dawb. Cov khoom tiav tau tiav yog tom qab ntawd kev ntsuas zoo los xyuas kom ntseeg tau tias cov khoom lag luam xav tau thiab cov lus qhia zoo li no, cov khoom siv noo noo thiab noo noo. Nws yog tom qab ntawd ntim thiab xa mus rau tus neeg siv kawg.
Txhawm rau kom suav cov txheej txheem ntawm cellulose muaj xws li npaj cov khoom siv khoom ua raw, tshuaj ntxuav tshuaj, tshuaj ntxuav kom dawb, ua raws li kev tswj xyuas zoo. Tag nrho cov txheej txheem yuav tsum muaj cov khoom siv tshwj xeeb thiab kev paub txog cov tshuaj lom neeg thiab tau nqa tawm hauv cov xwm txheej tswj hwm. Kev tsim kho cellulose yog qhov nyuaj thiab lub sijhawm siv sijhawm, tab sis yog qhov tseem ceeb hauv ntau kev lag luam.
Lub sij hawm Post: Jun-21-2023