Cov cuab yeej tseem ceeb tshaj plaws ntawm cellulose ether yog nws cov dej khaws cia hauv cov ntaub ntawv hauv tsev. Tsis tas li ntawd ntawm cellulose ether, txheej nyias nyias, cov xis nyob hauv txoj kev thiab lub tshuaj khib tsis tuaj yeem tawv thiab ua tiav cov cohesion zoo. Nyob rau tib lub sijhawm, ntxiv ntawm cellulose ether ua colp muaj cov kuab huv thiab yoog tau zoo, thiab txhim kho lub zog ntawm lub tshuaj khib. Cia peb tham txog qhov cuam tshuam rau daim ntawv thov ntawm cov tshuaj khib qhuav los ntawm cov khoom lag luam ether ether.
1. Lub ntsej muag ntawm cellulose ether
Qhov zoo ntawm cellulose ether cuam tshuam nws solubility. Piv txwv li, qis dua ntawm cov cellule ntawm cellulose ether, ua kom nrawm dua hauv cov dej thiab kev txhim kho ntawm cov dej khaws cia. Yog li ntawd, lub fineness ntawm cellulose cellulose yuav tsum suav nrog ib qho ntawm nws cov khoom tshawb nrhiav. Feem ntau hais lus, cov sole cov suab nrov ntawm cellulose ether kim heev tshaj 0.212mm yuav tsum tsis pub tshaj 8.0%.
2. Kom yuag poob phaus
Lub ziab kom yuag poob tus nqi yog hais txog feem pua ntawm cov khoom ploj hauv qhov loj ntawm cov qauv ploj thaum lub cellulose ether yog qhuav ntawm ib qho kub. Rau qee qhov zoo ntawm cellulose ether, qhov kev ziab poob phaus dhau lawm, uas yuav cuam tshuam rau cov khoom siv hauv qab daus, thiab nce tus nqi yuav khoom. Feem ntau, qhov hnyav poob ntawm ziab ntawm cellulose ether tsis ntau tshaj 6.0%.
3. Sulfate tshauv cov ntsiab lus ntawm cellulose ether
Rau qee yam zoo ntawm cellulose ether, cov hmoov tshauv siab dhau, uas yuav txo cov ntsiab lus ntawm cellulose hauv cov ntawv thov cov txiaj ntsig ntawm cov khoom lag luam hauv qab. Sulfate tshauv cov ntsiab lus ntawm cellulose ether yog qhov tseem ceeb ntawm nws tus kheej kev ua tau zoo. Ua ke nrog cov xwm txheej tam sim no ntawm kuv lub teb chaws muaj cov ntaub ntawv uas twb muaj lawm ether cov ntsiab lus ntawm hac cellulose yuav tsum tsis pub tshaj 10.0%.
4. Viscosity ntawm cellulose ether
Cov dej khaws cia thiab cov nyhuv tuab ntawm cellulose ether feem ntau yog nyob ntawm visculose thiab kev noj tshuaj ether nws tus kheej ntxiv rau cov cement slurry.
5. Tus nqi PHF ntawm cellulose ether
Lub viscosity ntawm cellulose cov khoom yuav maj mam tsawg dua tom qab tau muab cia rau cov khoom lag luam ntau dua, yog li nws yog ib qho tsim nyog los txwv PH. Feem ntau, nws raug nquahu kom tswj tau cov lus ntawm cellulose ether rau 5-9.
6. Lub teeb kev hloov pauv ntawm cellulose ether
Lub teeb kev hloov pauv ntawm cellulose ether ncaj qha cuam tshuam nws daim ntawv thov cov txiaj ntsig hauv cov ntaub ntawv tsim tsev. Qhov tseem ceeb tshaj plaws cuam tshuam lub teeb kev hloov pauv ntawm cellulose ether yog: (1) qhov zoo ntawm cov ntaub ntawv raw; (2) cov nyhuv ntawm alkalization; (3) tus txheej txheem sib piv; (4) solvent piv; (5) nruab nrab nyhuv.
Raws li cov nyhuv siv, lub teeb kev hloov pauv ntawm cellulose ether yuav tsum tsis pub tsawg tshaj 80%.
7. Lub qhov kub ntawm cellulose ether
Cellulose ether feem ntau yog siv ua viscosifier, yas thiab kub thiab txias yog kev ntsuas qhov zoo ntawm cellulose ether. Qhov kub thiab txias yog siv los txiav txim siab hom cellulose ether, uas muaj feem xyuam nrog rau qib ntawm kev hloov pauv ntawm cov cellulose ether. Tsis tas li ntawd, cov ntsev thiab cov impurities tuaj yeem cuam tshuam rau cov gel kub. Thaum qhov ntsuas kub ntawm kev daws teeb meem, lub cellulose maj mam plam dej, thiab viscosity ntawm kev daws teeb meem. Thaum lub gel point tau mus txog, cov polymer yog lub cev qhuav dej tag thiab ua rau gel. Yog li ntawd, hauv cov khoom noj khoom noj kom xis, qhov ntsuas kub feem ntau tswj hwm hauv qab no thawj zaug kub. Nyob rau hauv cov mob no, qis dua qhov kub, qhov ntau dua qhov viscosity, thiab qhov ntau pom tseeb cov nyhuv ntawm thickening thiab dej khaws cia.
Lub Sijhawm Post: Apr-28-2023