Hauv cov cement mortar thiab gypsum-based slurry,Hydroxypropyl methylcellulose yog ib qho khoom siv zoofeem ntau plays lub luag hauj lwm ntawm dej tuav thiab thickening, uas yuav ua tau zoo txhim kho lub cohesion thiab sag kuj ntawm slurry.Cov yam ntxwv xws li huab cua kub, kub thiab cua siab yuav cuam tshuam rau evaporation tus nqi ntawm cov dej hauv cement mortar thiab gypsum-based khoom.Yog li ntawd, nyob rau lub caij sib txawv, muaj qee qhov sib txawv ntawm cov dej tuav cov khoom nrog tib tus nqi ntawm hydroxypropyl methylcellulose ntxiv.Hauv kev tsim kho tshwj xeeb, cov dej tuav cov nyhuv ntawm cov slurry tuaj yeem hloov kho los ntawm kev nce lossis txo tus nqi ntawm HPMC ntxiv.Cov dej tuav ntawm methyl cellulose ether ntawm qhov kub thiab txias yog ib qho tseem ceeb qhia kom paub qhov zoo ntawm methyl cellulose ether.
Cov khoom lag luam zoo heev hydroxypropyl methylcellulose series tuaj yeem daws qhov teeb meem ntawm dej tuav ntawm qhov kub thiab txias.Nyob rau hauv lub caij kub kub, tshwj xeeb tshaj yog nyob rau hauv kub thiab qhuav thiab nyias-txheej tsim nyob rau hauv tshav ntuj sab, high-zoo HPMC yuav tsum tau los txhim kho cov dej tuav ntawm slurry.
High-zoo HPMC, nrog zoo heev uniformity, nws cov methoxy thiab hydroxypropoxy pawg yog tusyees faib raws li cellulose molecular saw, uas yuav txhim kho lub peev xwm ntawm cov pa atoms ntawm hydroxyl thiab ether bonds mus koom nrog dej los tsim hydrogen bonds, yog li ntawd. Cov dej dawb ua cov dej khi, yog li txhawm rau tswj cov evaporation ntawm cov dej los ntawm huab cua kub thiab ua tiav cov dej khaws cia siab.Cov dej yuav tsum tau ua kom muaj dej txhawm rau txhawm rau tsim cov khoom siv cementitious xws li cement thiab gypsum.Qhov tseeb ntawm HPMC tuaj yeem khaws cov dej hauv mortar ntev txaus kom tso cai rau kev teeb tsa thiab kev ua kom tawv nqaij mus ntxiv.
Tus nqi ntawm HPMC yuav tsum tau kom muaj peev xwm tuav tau dej txaus nyob ntawm:
1. Lub absorbency ntawm lub hauv paus txheej
2. Cov muaj pes tsawg leeg ntawm mortar
3. Lub thickness ntawm lub mortar
4. Cov dej yuav tsum tau ntawm mortar
5. Lub sijhawm teeb tsa ntawm cov khoom siv cementitious
High-zoo hydroxypropyl methylcellulose tuaj yeem ua tau zoo sib xws thiab muaj txiaj ntsig zoo hauv cov cement mortar thiab gypsum-based khoom, thiab qhwv tag nrho cov khoom siv, thiab tsim cov yeeb yaj kiab ntub dej, thiab cov dej noo hauv lub hauv paus yog maj mam tso rau lub sijhawm ntev., thiab cov tshuaj tiv thaiv hydration tshwm sim nrog cov khoom siv cementitious inorganic, yog li ua kom lub zog sib txuas thiab compressive zog ntawm cov khoom.
duab
Yog li ntawd, nyob rau hauv high-temperature lub caij ntuj sov kev tsim kho, thiaj li yuav ua kom tiav cov nyhuv ntawm cov dej tuav, nws yog tsim nyog los ntxiv high-zoo HPMC cov khoom nyob rau hauv txaus kom muaj nuj nqis raws li cov mis, txwv tsis pub, yuav muaj tsis txaus hydration, lub zog txo, tawg, hollowing thiab ntog tawm los ntawm kev ziab sai heev.Nws kuj ua rau muaj kev nyuaj ntawm kev tsim kho rau cov neeg ua haujlwm.Raws li qhov kub thiab txias, qhov sib ntxiv ntawm HPMC tuaj yeem txo qis, thiab tib cov dej tuav tau tuaj yeem ua tiav.
Post lub sij hawm: Oct-20-2022