Cov khoom noj kom xisas, xws li qhob ua, tshuaj khib, thiab lwm yam ntaub ntawv hauv tsev, tau siv dav hauv cov tsev niaj hnub no. Cellulose muaj kev hais ua (xws li hydroxypropylulose (HPMC), Hydroethylulose (Hemc) yog qhov tseem ceeb txhim kho kev ua tau zoo ntawm cov khoom noj. Txhawm rau kom ua tiav cov khoom zoo no, nws yog qhov tseem ceeb heev rau tswv thiab tswj cov kev ua tau zoo ntawm cellulose muaj kev hais ua neeg muaj kev hais ua.
1. Cov khoom yooj yim thiab cov haujlwm ntawm cov cellulose muaj cov neeg muaj cai
Cov neeg hais txog cellulose yog chav kawm ntawm cov tshuaj lom neeg derivpose ntawm cov pab pawg hydroxyl yog ib nrab los ntawm kev tiv thaiv etherification. Ntau hom cellulose muaj kev hais ua ke tuaj yeem ua ke raws li hom thiab tus naj npawb ntawm cov neeg hloov chaw, thiab txhua hom muaj lub luag haujlwm sib txawv hauv cov khoom noj.
Viscosity ntawm cellulose neeg muaj kev pab:
Lub viscosity ntawm cov neeg muaj kev pab cellulose ncaj qha cuam tshuam rau lub rheology thiab kev ruaj ntseg ntawm cov cement muab tshuaj txhuam. High-viscosity cellulose Cov neeg muaj cai ua kom muaj zog thiab tsev pheeb suab ntawm lub paste, tab sis yuav txo nws lub felle. Tsawg Cellulos Cellulose Kev Ua Phem tau pab txhim kho kev ua haujlwm thiab fellity.
Qib ntawm kev hloov pauv (DS) thiab kev hloov kho hniav puas (MS):
Cov qib degree hloov pauv thiab cov hniav luam ntawv hloov chaw ntawm cellulose muaj cov neeg muaj kev hais txog nws solubility thiab lub viscosity ntawm kev daws. Cov qib siab ntawm kev hloov pauv thiab cov kab mob siab ntau dua tuaj yeem ua kom cov dej ua kom muaj kev nyab xeeb ntawm cellulose.
Solubility ntawm Cellulose muaj cov neeg muaj kev kawm:
Qhov kev sib cais thiab solubility ntawm cellulose neeg ua rau muaj kev cuam tshuam rau kev sib xws ntawm cov cement muab tshuaj txhuam. Cellulose muaj cov neeg muaj kev hais nrog solubility zoo tuaj yeem tsim cov kev daws teeb meem sai sai, yog li ua kom muaj kev sib luag thiab ruaj khov ntawm cov tshuaj txhuam.
2. Xaiv cov neeg ua haujlwm cellulose haum
Cov xwm txheej sib txawv muaj cov kev xav tau rau cov neeg muaj kev pab cuam cellulose. Xaiv cov hom yog thiab tshwj xeeb ntawm cellulose ether tuaj yeem txhim kho kev ua tau zoo ntawm cov khoom noj khoom haus MAAs:
Qhuas:
Hauv cov ntawv thov xws li pobzeb cov nplaum thiab plaster mortarged, xws li HPMC zoo dua thiab kav ntev dua kev tsim kho thiab lub zog ua kom muaj zog.
Dej-khaws cov ntaub ntawv:
Hauv kev coj tus kheej lub pob zeb thiab cov txiv qaub-raws cov nplaum nplaum, cov cellulose muaj cov neeg muaj kev pab nrog dej siab (xws li HEMC) yuav tsum muaj. Kev tuav dej siab yuav pab tiv thaiv cov dej ua kom muaj dej ua ntej, yog li ua kom muaj kev khiav dej tsis txaus thiab ua haujlwm ntev.
Kev txhawb cov ntaub ntawv:
Cov neeg hais txog cellulose siv los txhim kho lub zog ntawm MAAs cov khoom yuav tsum muaj qhov ua tau zoo thiab mob viscirecosity los txhim kho cov kev sib xws thiab lub zog ntawm lub matrix.
3. Txhim kho txoj kev ntxiv ntxiv
Tswj kev ntxiv txoj kev sib ntxiv ntawm cellulose ether hauv cov khoom noj yog qhov tseem ceeb heev rau ntau qhov ua tau zoo. Cov hauv qab no yog ntau txoj kev ua kom zoo:
Premixing Txoj Kev:
Sib tov cellulose nrog lwm cov khoom kom qhuav ua ntej. Txoj kev no tuaj yeem zam dhau qhov kev tsim ntawm agglomeration ntawm cellulose ntawm cellulose ntawm kev sib chwv dej, yog li ntseeg tau nws cov kev sib cais hauv cov slurry.
Kev ntub dej sib xyaw:
Ntxiv cellulose ether kom cement slurry maj mam. Hom qauv no yog tsim nyog rau qhov teeb meem uas cellulose ether zom sai sai thiab pab ua kom raug ncua.
Segmented Txoj Kev:
Nyob rau hauv cov txheej txheem ntawm npaj cement slurry, ntxiv cellulose cellulose ether hauv ntu tuaj yeem ua kom nws cov txheej txheem npaj ua haujlwm thoob plaws hauv kev npaj thiab txo agglomeration.
4. Tswj Sab Nraud Sab Nraud
Cov xwm txheej sab nraud xws li kub, Py tus nqi, thiab stirring tus nqi muaj qhov cuam tshuam tseem ceeb ntawm kev ua haujlwm ntawm cellulose ether.
Tswj kub:
Lub solubility thiab viscosity ntawm cellulose ether yog qhov rhiab heev rau qhov kub. Siab dua pab cellulose ether kom yaj sai, tab sis kuj yuav ua rau viscosity ntawm kev txo qis. Qhov kub yuav tsum tau hloov kho raws li cov xwm txheej kev thov tshwj xeeb kom ntseeg tau cov kev ua haujlwm zoo thiab ua tau zoo.
Ph Haum: Tus nqi ntawm cov ntxhib no feem ntau yog nyob rau hauv cov alkaline siab, thaum lub solubility ntau, thaum lub solubility thiab viscosity ntawm cellulose kev hloov pauv ntawm tus nqi. Tswj cov nqi PHY rau hauv cov khoom tsim nyog tuaj yeem tswj tau cov kev ua tau zoo ntawm cellulose ether.
Dirringing tus nqi: Tus nqi stirring cuam tshuam rau cov dispersion nyhuv ntawm cellulose ether hauv cov cement muab tshuaj txhuam. Kev ua kom zoo heev yuav ua rau cov cua sov thiab sib sau ua ke ether, thaum lub sij hawm tsav loj pab txhawb thiab tshem cellulose ether.
5. Kev tsom xam thiab cov tswv yim tswv yim
Los ntawm kev soj ntsuam cov ntaub ntawv tiag tiag, peb tuaj yeem nkag siab ntxiv txog daim ntawv thov thiab txhim kho cov tswv yim ntawm cellulose ether nyob rau cov khoom sib txawv ntawm cov khoom siv.
Kev ua haujlwm siab hom nplaum nplaum: thaum lub tuam txhab tau tsim cov khoom ua haujlwm zoo ntawm cov khoom lag luam qub, nws tau pom tias cov dej khaws cia tsis txaus, ua rau muaj kev txo qis hauv lub zog tom qab kev tsim kho. Los ntawm kev qhia cov dej siab-khaws cia HEMC thiab kho nws txoj kev ntxiv thiab ntxiv cov txheej txheem (siv cov txheej txheem ua ntej tshaj plaws
Kev Ntsuas Tus Kheej Theem: Cov khoom siv hauv pem teb tswj hwm tau siv hauv qee qhov project muaj fluciality thiab kev ncaj ncees tsis zoo tom qab kev tsim kho. Los xaiv cov viscosity tsawg-viscos thiab ua kom zoo rau cov stirring thiab ntsuas kub thiab kev tsim kho cov slurry tau txhim kho, ua rau lub hauv pem teb kawg.
Kev tswj hwm kev ua yeeb yam ntawm cellulose ether hauv cov khoom noj yog tus yuam sij txhawm rau txhim kho cov khoom ua haujlwm thiab kev tsim kho. Los ntawm xaiv txoj cai hom cellulose ether, tsim kom muaj qhov tseem ceeb ntawm cov dej khov, thiab kev ua kom zoo nkauj, thiab firstion tuaj yeem txhim kho. Hauv kev siv cov kev siv, nws yog ib qho tsim nyog yuav tsis tas yuav tsum tsis tu ncua thiab kho qhov siv ntawm cellulose ether raws li kev xav tau thiab daim ntawv teev cov txiaj ntsig kom ua tiav cov txiaj ntsig zoo tshaj plaws kom ua tiav cov txiaj ntsig zoo tshaj plaws.
Lub Sijhawm Post: Jun-26-2024