Hauv cov cement mortar thiab gypsum-based slurry, hydroxypropyl methylcellulose tsuas yog ua lub luag haujlwm ntawm dej tuav thiab thickening, thiab tuaj yeem txhim kho qhov adhesion thiab sag resistance ntawm slurry.
Cov yam ntxwv xws li huab cua kub, kub thiab cua siab ceev yuav cuam tshuam rau cov volatilization 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. Kev tuav dej nyob rau hauv qhov kub thiab txias yog qhov taw qhia tseem ceeb kom paub qhov zoo ntawm hydroxypropyl methylcellulose ether.
Cov khoom lag luam zoo heev hydroxypropyl methylcellulose series tuaj yeem daws qhov teeb meem ntawm cov dej tuav hauv 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-quality HPMC muaj zoo heev uniformity. Nws cov methoxy thiab hydroxypropoxy pawg yog sib npaug ntawm cov saw cellulose molecular, uas tuaj yeem txhim kho lub peev xwm ntawm oxygen atoms ntawm hydroxyl thiab ether bonds los koom nrog dej los tsim hydrogen bonds. , kom cov dej dawb ua cov dej khi, kom tswj tau cov evaporation ntawm cov dej los ntawm huab cua kub, thiab ua tiav cov dej tuav tau zoo.
High-zoo hydroxypropyl methylcellulose tuaj yeem ua tau zoo sib xws thiab ua haujlwm zoo hauv cov cement mortar thiab gypsum-raws li cov khoom, thiab qhwv tag nrho cov khoom siv, thiab tsim ib zaj duab xis ntub dej, thiab cov dej noo hauv lub hauv paus yog maj mam tso tawm rau lub sijhawm ntev, thiab hydration cov tshuaj tiv thaiv nrog cov khoom siv inorganic gelling los xyuas kom meej lub zog sib txuas thiab compressive zog ntawm cov khoom.
Yog li ntawd, nyob rau hauv high-temperature lub caij ntuj sov tsim, thiaj li yuav ua tau cov dej tuav nyhuv, nws yog tsim nyog los ntxiv high-zoo HPMC cov khoom nyob rau hauv txaus kom muaj nuj nqis raws li lub mis, txwv tsis pub, yuav muaj tsis txaus hydration, txo lub zog, tawg, hollowing. thiab shedding tshwm sim los ntawm over drying. teeb meem, tab sis kuj nce kev tsim kho nyuaj ntawm cov neeg ua haujlwm. Raws li qhov kub thiab txias, qhov nyiaj ntawm HPMC ntxiv tuaj yeem txo qis, thiab tib cov dej tuav tau tuaj yeem ua tiav.
Lub sij hawm xa tuaj: Plaub Hlis-13-2023