Cellulose ether yog cov khoom siv ua haujlwm tau siv hauv kev tsim kho, tshuaj, khoom noj, tshuaj pleev ib ce thiab lwm thaj teb. Nws cov dej khaws cia yog ib qho ntawm nws cov yam ntxwv tseem ceeb, tshwj xeeb tshaj yog nyob rau hauv daim ntawv thov cov ntaub ntawv ua xws li tshuaj khib thiab xis mas. Dej khaws cia yog hais txog kev muaj peev xwm ntawm cellulose etherively xauv rau hauv dej noo tom qab nqus dej thiab tsis muaj noo noo dhau sai. Cov xeeb ceem no tsis tsuas yog cuam tshuam rau kev ua haujlwm ntawm cov khoom siv, tab sis kuj ua lub luag haujlwm tseem ceeb hauv nws lub zog kawg thiab lub zog.
Dej Txhim Kho Kom Txhim Kho Kom Zoo ntawm Cellulose Ethaws
Cellulose ether muaj muaj zog heev hydrophilicity, uas los ntawm ntau ntawm hydroxyl (-oh) pawg nyob rau hauv nws cov qauv molecular. Hydroxyl pawg yooj yim tsim nrog dej lwg me, tso cai cellulose ether los nqus thiab khaws cov dej ntau. Nyob rau hauv aqueous daws, cellulose ither kuj txwv tsis pub muaj dej ntawm cov dej thiab txo cov dej evapourively ntawm cov dej ua kom rov qab los ntawm cov khoom.
Cellulose ether tuaj yeem hloov kho nws cov dej tso tawm nyob rau hauv cov kub sib txawv thiab cua noo tej yam. Piv txwv li, nyob rau hauv ib puag ncig kub ib puag ncig, kev hloov pauv ntawm cov dej evaposity los ntawm kev hloov pauv ntawm dej dhau los nyob rau hauv thaum ntxov ntawm cov theem ntawm cov khoom.
Yam cuam tshuam rau kev siv dej
1. Qeb ntawm kev hloov pauv (DS)
Cov qib ntawm kev hloov chaw ntawm cellulose ether yog ib qho tseem ceeb cuam tshuam rau nws cov dej khaws cia. Cov degree ntawm kev hloov pauv yog hais txog qib uas cov pawg hydroxyl hauv lub cellulose molecule tau hloov los ntawm ether pawg. Cov qib siab dua ntawm kev hloov pauv, ntau dua cov dej solubility thiab dej khaws cia ntawm cellulose ether. Cov ntaub ntawv muaj kev pab ntau yam xws li hydroxyprropy cellulcase (HEC) thiab hydroxyethyl cov khoom siv los ntawm kev hloov pauv cov kev xav tau ntawm cov ntawv thov sib txawv.
2. Molecular hnyav
Qhov hnyav molecular ntawm cov cellulose ether muaj qhov cuam tshuam ncaj qha rau nws cov dej khaws cia. Feem ntau hais lus, qhov hnyav dua ntawm cov qauv molecular, ntau dua cov qauv ether thiab muaj zog ntawm cov dej hydrogel network, uas pab txhim kho cov dej khaws cia ntawm cov khoom. Txawm li cas los xij, siab dhau ib qho kev ua haujlwm molecular kuj tseem yuav ua rau muaj kev tsim kho hauv cov khoom siv, xws li txo cov kua dej thiab txo ntawm kev tsim kho. Yog li ntawd, hauv kev siv cov ntawv thov, nws yog qhov tsim nyog kom pom qhov sib npaug ntawm dej rov qab thiab kev tsim kho.
3. Kub thiab av noo
Qhov kub thiab txias thiab av noo yog cov chaw ib puag ncig sab nraud uas cuam tshuam rau cov dej ua kom muaj kev hais ua cellulose. Raws li qhov ntsuas kub, tus neeg evaporates dej nrawm, thiab cov kws kho mob cellulose xav tau cov dej kom muaj zog ua kom muaj zog. Nyob rau hauv ib puag ncig nrog cov av noo qis, dej ua kev ua tau zoo ntawm cellulose muaj kev hais ua ke kuj tseem muaj kev tiv thaiv cov khoom los ntawm kev poob dej sai sai thaum kev tsim kho.
Lub luag haujlwm ntawm dej ceev hauv cov ntawv thov sib txawv
1. Daim ntawv thov hauv cov ntaub ntawv tsim
Hauv cov ntaub ntawv hauv tsev, cov dej khaws nyiaj khaws cia cov neeg muaj kev hais ua cellulose yog siv hauv cov khoom xws li tshuaj khib thiab pob zeb. Cov dej nplua zog muaj peev xwm ua kom pom tseeb tias cov khoom muaj dej txaus thaum lub sijhawm ua kom tawv nqaij tawv, yog li txhim kho nws lub zog thiab lub zog. Tshwj xeeb tshaj yog cov txheej txheej nyias lossis cov dej kom huv tau kom muaj teeb meem zoo xws li kev tawg thiab cov khoom noj vim yog dej nrawm.
2. Daim ntawv thov nyob hauv kev ua haujlwm kho mob
Hauv kev ua haujlwm kho mob, cov neeg muaj kev pab cuam cellulose feem ntau siv hauv kev npaj tshuaj uas muaj cov ntawv tso cai, cov yeeb yaj kiab cov neeg sawv cev. Nws cov dej khaws cia tsis tsuas yog pab rau qhov ruaj ntseg tso tawm hauv lub cev, tab sis kuj tseem txhim kho cov xyoob ntoo. Tsis tas li ntawd, cov khoom siv dej los ntawm cov khoom uas muaj cov neeg muaj kev pab cuam cellulose tseem tau siv dav hauv cov khoom tu tawv nqaij los pab tswj kom cov tawv nqaij noo ntawm daim tawv nqaij.
3. Daim ntawv thov hauv kev lag luam khoom noj khoom haus
Cov neeg hais kom lwm tus neeg ua haujlwm ntawm cellulose feem ntau yog siv raws li cov tuab, emulsifiers thiab stabilizers hauv kev lag luam khoom noj. Nws cov dej-khaws cov khoom pab txhim kho kom muaj qhov saj thiab kev ntxhib los mos hauv cov khob cij thiab pastries, thiab nthuav tawm lub txee txee ntawm cov khoom lag luam.
Cov khoom siv dej-khaws cia cov khoom ntawm cellulose yog lub hauv paus rau nws txoj haujlwm tseem ceeb hauv ntau daim ntawv thov. Los ntawm kev txhim kho cov qib tuag, hnyav thiab xaiv cellulose ntau yam, cov cai rau cov khoom siv dej hauv cov teb sib txawv tuaj yeem ua tau. Nyob rau yav tom ntej, nrog rau kev txhim kho kev tshawb fawb thiab thev naus laus zis, kev siv ntawm cov khoom siv tau dav dav, thiab qhov tseem ceeb ntawm nws cov chaw hauv ntau daim teb yuav tau tshaj tawm ntxiv.
Lub Sijhawm Post: Feb-17-2025