Daws cellulose neeg muaj cai tuaj yeem ua cov txheej txheem nyuaj vim lawv cov qauv tshuaj thiab cov khoom ntiag tug. Cellulose Cov neeg muaj kev hais ua dej yog dej-soluble polymers muab los ntawm cellulose, ib qho tshwm sim hauv cov phab ntsa ntawm tsob ntoo. Lawv tau siv dav hauv ntau yam kev lag luam xws li cov tshuaj kiab duab, khoom noj, cov ntawv nyeem, thiab kev ua yeeb yaj kiab zoo heev, khi cov khoom siv, thiab stabilizing tej yam.
1. Nkag siab txog cellulose muaj kev hais ua:
Cov neeg hais txog cellulose yog derivatives ntawm cellulose, qhov twg cov pawg hydroxyl yog ib nrab los yog hloov pauv txhua yam nrog ether pawg. Cov hom feem ntau muaj xws li mehlulose (MC), HydroxyPropyl cellulose (HPC), hydrokethyl cellulose (cmc). Txhua hom muaj cov khoom muaj txiaj ntsig nyob ntawm cov lej hloov chaw.
2. Qhov xwm txheej cuam tshuam rau solubility:
Ntau yam cuam tshuam rau cov solubility ntawm cellulose muaj cov neeg muaj cai:
DSURDURDURDURDURDURDURDURDURDURRY (DS): Cov DS feem ntau txhim kho Solubility uas nws nce lub hydrophilicity ntawm cov polymer.
Molecular qhov hnyav: phaus molecular hnyav ntawm cov neeg uas hais tias cov neeg hais tias cov neeg hais tias cov neeg muaj kev hais ntau dua lossis lub zog rau kev sib cais.
Cov Khoom Siv Hluav Taws Xob: cov kuab tshuaj uas muaj lub zog siab polarity thiab hydrogen sib zog muaj peev xwm, xws li dej thiab cov kuab tshuaj organic, feem ntau yog ua tau zoo rau kev ua kom yaj cellulose.
Qhov kub thiab txias: Ua kom muaj kev kub ntxhov tuaj yeem txhim kho solubility los ntawm kev nce kev sib zog kev sib zog ntawm cov lwg me me.
Agitation: Kev siv tshuab ua haujlwm tuaj yeem pab tau los ntawm kev sib cuag los ntawm kev sib cuag ntawm cov kuab tshuaj thiab cov polymer.
PH: Rau qee qhov kev pab cuam ntawm cellulose xws li CMC, P muaj peev xwm cuam tshuam ntau rau Solubility vim nws cov pab pawg carboxymethyl.
3. Cov tshuaj yaj kiab rau kev sib cuam tshuam:
Dej: Feem ntau cellulose cov neeg hais ua tau yooj yim soluble hauv dej, ua rau nws thawj cov kuab tshuaj rau ntau yam kev siv.
Cawv: Ethanol, thiab isopropanol yog feem ntau siv co-emolents los txhim kho cov solubility ntawm cellulose neeg muaj kev pab hais tias muaj kev txwv solubility.
Organic cov kuab tshuaj: dimethyl sulfoxide (DMOPS), dimetylformamide (n-methylprolidone (N-Methylprolidone (N-Methylprolidone (N-Methylprolidone (N-Methylprolidone (NCP) yog qhov yuav tsum tau ua.
4. Cov txuj ci sib cais:
Yooj Yim Hlob: Rau ntau daim ntawv thov, tsuas yog stormring cellulose cov neeg uas muaj kev pab cuam tshuam nyob rau hauv cov kuab hnyav ntawm qhov kub kub yog txaus rau kev sib txawv. Txawm li cas los xij, lub sijhawm kub siab dua thiab lub sijhawm ua kom pom ntev yuav tsim nyog kom tiav kev sib cais.
Cov cua sov: Ua kom sov cov qog lossis cov kuab tshuaj sib xyaw tuaj yeem nrawm dua cov kev ua haujlwm hnyav cellulos lossis cov uas muaj solubility ntau.
Ultrasonication: Ultrasonication tuaj yeem txhim kho cov kev sib cais los ntawm kev tsim cavitation npuas uas txhawb nqa kev ua txhaum ntawm polymer ntawm polymer aggregates thiab txhim kho cov kev nkag siab.
Kev siv co-solvents: sib txuas dej nrog cawv lossis lwm cov kuab tshuaj orgar tuaj yeem txhim kho kev hais ua solubility, tshwj xeeb tshaj yog rau cov dej cellulose uas muaj tsawg solubility.
5. Cov kev txiav txim siab:
Qhov loj me me: Fined filly hmoov cellulose cellulose cellulose cellulose cellulose cellulose cellulose cellulose cellulose cellulose cellulose cellulose cellulose ntau dua tau ntau dua li cov khoom loj dua vim nce thaj chaw thaj chaw.
Kev npaj ntawm kev daws teeb meem: npaj cellulose cellulose cov kev daws teeb meem, xws li dispersing lub zog ua ntej ntxiv cov kev so, tuaj yeem pab tiv thaiv clumping thiab xyuas kom zoo li qub.
PH.Yog: Rau cov cellulose muaj neeg muaj kev hais tsis sib haum rau pH, kho cov Ph ntawm cov kuab tshuaj tuaj yeem txhim kho solubility thiab ruaj khov.
Kev Nyab Xeeb: Qee cov kuab tshuaj uas siv rau cov neeg ua kom muaj kev pab tsawg cellololt yuav ua rau kev noj qab haus huv thiab kev nyab xeeb rau kev nyab xeeb. Qhov chaw dim pa thiab cov khoom tiv thaiv tus kheej yuav tsum tau siv thaum tuav cov kuab tshuaj no.
6. Daim ntawv thov-cov kev txiav txim siab tshwj xeeb:
Kws tsim txuj: cellulose muaj kev hais ua ke tau siv dav hauv cov kws sau tshuaj ntawm kev tso tawm, khi, thiab tuab. Qhov kev xaiv ntawm cov kuab tshuaj thiab cov qauv sib cais yog nyob ntawm cov kev tsim tshwj xeeb.
Khoom noj: hauv daim ntawv thov zaub mov noj, cov neeg muaj kev hais ua cellulose yog siv ua cov thickeners, stabilizers, thiab cov roj hloov. Cov kuab tshuaj tau tshaj tawm nrog cov cai zaub mov noj, thiab cov xwm txheej sib nrauj yuav tsum yog qhov zoo rau kev tswj cov khoom zoo.
Kev Tsim Kho: Cov neeg ua haujlwm raug pab cuam raug siv hauv cov khoom siv xws li tshuaj cug, grouts, thiab cov nplaum. Kev xaiv cov kuab tshuaj thiab cov xwm txheej sib cais yog qhov tseem ceeb ua kom tiav qhov xav tau yam xav tau thiab cov khoom ua tau zoo.
7. Yav dhau los cov lus qhia:
Tshawb nrhiav rau hauv cov kev daws teeb meem tshiab thiab cov txheej txheem sib txawv ntxiv ua ntej ntawm cov cellulose ether phem. Cov tshuaj ntsuab ntsuab, xws li supercritical ce2 thiab ionic kua, muaj kev xaiv tau rau ib qho kev cuam tshuam nrog kev cuam tshuam ib puag ncig. Tsis tas li ntawd, kev nce qib hauv polymer engineering thiab nanotechnology tej zaum yuav ua rau kev txhim kho cellulose muaj kev pab cuam tus neeg muaj kev pab cuam thiab kev ua tau zoo solubility thiab kev ua tau zoo rau solubility thiab kev ua tau zoo rau solubility thiab kev ua tau zoo solubility thiab kev ua tiav cov yam ntxwv.
Kev sib cais ntawm cov txheej txheem uas muaj kev hais ua ke yog cov txheej txheem multifaceted los ntawm ntau yam xws li polymer qauv, thiab cov txheej txheem sib txawv. Nkag siab txog cov xwm txheej no thiab xaiv cov kuab tshuaj uas tsim nyog thiab kev ua tau zoo rau kev ua tau zoo ntawm cellulose muaj cov kev pab cuam hauv ntau yam kev siv.
Lub Sijhawm Post: Apr-10-2024