Hnub Tim:11,Txiav txim siab,2023
CellulosesMuaj ntau siv nyob rau hauv cov khoom siv cement, tshwj xeeb tshaj yog nyob rau hauv cov chaw nplua, vim lawv tau txais kev txuag dej zoo thiab ua kom muaj cov teebmeem zoo. Yog li ntawd, cov khoom thiab tsim tshuab ntawmCellulose ether hloov kho cov khoom siv Maas thiab cov kev sib cuam tshuam ntawmCellulose ether Thiab Maas Slurry tau maj mam dhau los ua kev saib xyuas hauv cov teb ntawm cov ntaub ntawv tsim tsev thiab engineering nyob rau xyoo tas los no. Ntau cov txiaj ntsig kev tshawb fawb tau ua tiav. Ua ke kev tshawb fawb kev kawm tau nce hauv tsev thiab txawv teb chaws, tseem muaj cov teeb meem hauv qab no hauv kev tshawb fawb thiab kev thov ntawmCellulose ether Hloov Kho Cov Khoom Siv Tsaws Ntsig:
1.Cov muaj ntau homcelluloses.Txawmcelluloses Siv hauv cov khoom siv rau cov paj tsib tau muab faib ua ntau hom xws li HEC, HEMMC thiab HPMC vim lawv qib kev hloov pauv. Tib homcellulosesmuaj ntau yam sib txawv hauv cov qauv molecular, hnyav hnyav, qib siab ntawm kev hloov pauv lossis cov ntsiab lus hloov chaw. Tam sim no, feem ntau tshawb fawb hauv tsev thiab txawv teb chaws tsom mus rau ib lossis ob pebcelluloses.Qhov kev xaiv ntawmCellulose eter txwv rau lawv cov lus ntawm daim ntawv thov. Cov qauv molecular yam ntxwv ntawmcelluloses yog tsis qhia, thiab lawv tus sawv cev tsis yog sawv cev. Qhov xaus yog qhov tshwm sim dhau los ntawm "ib nrab hloov", thiab muaj muaj kev sib cav thiab kev sib cav thiab kev sib cav ntawm cov txiaj ntsig kev sim. Yog li ntawd, nws yog ib qho tsim nyog yuav tsum tau ua kom cov txheej txheem kev faib tawm thiab cov teeb meem thiab cov txheej txheem ntawm ntau hom tsiaj ntawmCellulose ether Hloov kho cov ntaub ntawv loj.
2.Txoj kev nyeem ntawv tau kawm qhov cuam tshuam ntawmcelluloses Ntawm ntau yam khoom ntawm cov tshuaj xis, thiab ua ib qho kev tsom xam ntawm nws cov tshuab ua tsis tiav, tab sis ua tsis tiav los txiav txim siab qhov kev sib raug zoo ntawm cov qauv molecular ntawmcelluloses Thiab cov khoom ntawm kev hloov kho Maas Slurry. tsis tu ncua, thiab muaj qhov sib txawv ntawm lawv cov txheej txheem. NrogCellulose ether-modified CAs-based cov ntaub ntawv, muaj ob peb cov kev tshawb fawb ntawm cov ntaub ntawv sib txawv, uas tsis yog qhov tseem ceeb piav qhia kev tsim qauv txheej txheem ntawm ntau yam khoom ntawmCellulose ether-modified cement-based cov khoom siv. Cov. Txawm hais tias qee cov ntaub ntawv pom tiascelluloses Nrog cov qauv hluav taws xob sib txawv muaj cov kev mob sib txawv ntawm kev hydration ntawm xis mas, vim li cas tseem tsis tau txuas ntxiv.
3.Qhov txheej txheem ntawm cov cawv ntawmCellulose ether Ntawm Caas Izas muaj kev cuam tshuam txuas ntxiv mus kawm ntxiv. Tam sim no, hais txog lub sijhawm qeeb mechanism ntawmCellulose ether, Txawm tias Adsorption yog suav tias yog qhov ua rau muaj kev ncua ntawm kev ncua hydration ntawmCellulose ether, nws pom tias qhov muaj zog dua adsorption muaj peev xwm ntawm cov khoom siv hydration thiabCellulose ether, qhov ntau qeeb qeeb ntawm cov cement. Adsorption mechanism nruab nrab ntawmcelluloses thiab cement hulation khoom, nrog rau cov laj thawj rau qhov sib txawv adsorption peev xwm ntawm txawvcelluloses thiab cement hydration khoom, tsis tau kawm ntxiv.
4.existing ntaub ntawv qhia tau hais tiascelluloses Muaj peev xwm cuam tshuam ntau ntxiv rau cov qauv pore ntawm cov khoom noj qabent-raws.Celluloses Kuj tseem ntseeg tau tias yog cov khoom saum npoo av thiab muaj cov nyhuv cua-enrurries, yog li nce qhov porosity ntawm cov cement cemented. Txawm li cas los xij, cov cawv ntawmcelluloses Ntawm qhov tsis tu ncua thiab tsim cov tshuab ntawm cov xis mas slurry Pore loj muab faib tawm.
5. Rheological cov yam ntxwv yog qhov tseem ceeb ntawm daim ntawv thov ntawmcelluloses Hauv cov khoom noj kom meej. Hmoov tsis zoo, muaj qee qhov kev tshawb fawb ntawm cov khoom ntawm cov khoom ntawmCellulose ether Hloov Kho Ma Lus Maly Slurry nyob hauv tsev thiab txawv teb chaws.
Lub Sijhawm Post: Dec-11-2023
