Cellulose Etherification
Cellulose ether yog ib lo lus dav dav rau cov khoom lag luam uas tsim los ntawm cov tshuaj tiv thaiv ntawm alkali cellulose thiab tus sawv cev rau qee yam. Thaum Alkali cellulose raug hloov los ntawm cov neeg sawv cev sib txawv, cov kws txheeb xyuas cellulose txawv yuav tau txais.
Raws li Ionization cov yam ntxwv ntawm cov neeg tuaj ua haujlwm ntawm cellulose tuaj yeem muab faib ua ob pawg: ionic (xws li methyl cellulose).
Raws li hom hloov chaw, ether ether tuaj yeem faib ua monether (xws li hydrothpropyl methyl cellulose).
Raws li kev sib txawv solubility, nws tuaj yeem faib ua cov dej solubility (xws li hydroxyethyl cellulose (xws li Ethyl cellulose).
Dej-soluble cellulose cov neeg uas muaj kev pab nyob hauv cov khoom noj muaj sib xyaw ua ke tau muab faib ua cov lus hais txog kev ua kom muaj kev hais txog cellule.
Lawv qhov sib txawv nyob qhov twg? Thiab yuav ua li cas du kho nws mus rau 2% kev daws rau cov tshuaj ntsuam viscosity?
Dab tsi yog cov kev kho deg?
Cov nyhuv ntawm cellulose ether?
thawj
Kev kho deg yog ib txoj kev ntawm artificially tsim ib txheej saum npoo av nyob rau saum npoo ntawm cov khoom siv nrog cov tshuab, lub cev sib txawv thiab tshuaj sib txawv ntawm lub hauv paus.
Lub hom phiaj ntawm kev kho mob sab saum toj ether yog ncua sij hawm ua kom tiav ntawm kev ua kom cov coruls tsis zoo ntawm kev ua kom cov coruloss, thiab tseem ua kom cov corrosion tsis kam ntawm Cellule ether thiab txhim kho kev ruaj ntseg.
Qhov sib txawv thaum dej txias tau teeb tsa nrog 2% kev daws teeb meem:
Cov txheej txheem sab npoo ether tuaj yeem tawg sai nyob rau hauv dej txias thiab tsis yooj yim rau agglomerate vim nws qeeb viscositions;
Cellulose ether tsis muaj kev kho deg, vim nws cov viscosities ua kom ceev, yuav ua kom khov ua ntej nws tsis txias rau hauv dej txias, thiab yog ib txwm rau agglomeration.
Yuav ua li cas teeb tsa lub cellule-kho cellulose ether?
1. Ua ntej tso rau hauv qee qhov ntau ntawm cov khoom siv tsis zoo ntawm cov npoo ether;
2. Tom qab ntawd ntxiv dej kub txog li ntawm 80 degrees Celsius, qhov hnyav yog ib-feem peb ntawm cov dej uas xav tau, kom nws tuaj yeem hloov zuj zus tuaj thiab tawg.
3. Tom ntej, maj mam hliv rau hauv dej txias, qhov hnyav yog ob feem ntau yog ob feem ntau ntawm cov dej uas tseem tshuav, thiab yuav tsis muaj agglomeration;
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Lub sijhawm Post: Feb-02-2023