Yuav ua li cas xaiv hydroxypropyl methylcellulose los ntawm kev tuav dej

Cov dej tuav los ntawm hydroxypropyl methylcellulose yog ib qho ntawm cov khoom tseem ceeb ntawm hydroxypropyl methylcellulose. 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.

Feem ntau, qhov siab dua qhov viscosity ntawm hydroxypropyl methylcellulose, qhov zoo dua cov dej tuav yuav zoo, tab sis cov nyhuv ntawm viscosity ntawm cov dej tuav yuav raug txo thaum lub viscosity tshaj 100,000 mpa.s. Rau hydroxypropyl methylcellulose nrog viscosity ntawm ntau tshaj 100,000, nws yog ib qho tsim nyog yuav tsum tau ua kom cov hydroxypropyl methylcellulose nce cov dej tuav tau zoo.

Hauv kev tsim kho tshwj xeeb, cov dej tuav cov nyhuv ntawm slurry tuaj yeem hloov kho los ntawm kev nce lossis txo qis ntawm hydroxypropyl methylcellulose. Hydroxypropyl methylcellulose series cov khoom lag luam 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 sab hnub tuaj, high-zoo hydroxypropyl methylcellulose yuav tsum tau los txhim kho cov dej tuav ntawm slurry.

High-zoo hydroxypropyl methylcellulose muaj qhov zoo sib xws. Nws pawg methoxyl thiab hydroxypropoxyl yog sib npaug ntawm cov saw cellulose molecular. Nws tuaj yeem txhim kho cov pa atoms ntawm hydroxyl thiab ether bonds. Lub peev xwm ntawm cov dej koom ua ke los tsim cov ntawv cog lus hydrogen hloov dej dawb rau hauv cov dej khi, yog li tswj tau cov dej evaporation los ntawm huab cua kub thiab ua tiav cov dej tuav tau zoo.

High-zoo hydroxypropyl methylcellulose tuaj yeem sib npaug thiab ua haujlwm zoo hauv cov cement mortar thiab gypsum-based khoom, qhwv tag nrho cov khoom siv, thiab tsim ib zaj duab xis ntub dej, thiab cov dej noo hauv lub hauv paus yuav raug tso tawm maj mam dhau lub sijhawm ntev. Cov tshuaj tiv thaiv hydration tshwm sim nrog cov khoom siv inorganic gelling, yog li ua kom lub zog ntawm daim ntawv cog lus thiab compressive zog ntawm cov khoom. Yog li ntawd, nyob rau hauv high-temperature lub caij ntuj sov kev tsim kho, thiaj li yuav ua kom tiav cov dej tuav nyhuv, nws yog tsim nyog los ntxiv high-zoo hydroxypropyl methylcellulose cov khoom nyob rau hauv txaus kom muaj nuj nqis raws li cov mis nyuj, txwv tsis pub, tsis txaus hydration, txo lub zog, thiab tawg yuav tshwm sim. kom qhuav qhuav heev. Cov teeb meem zoo xws li hollowing, hollowing thiab ntog kuj ua rau muaj kev nyuaj ntawm kev tsim kho rau cov neeg ua haujlwm. Raws li qhov kub thiab txias, qhov nyiaj ntawm hydroxypropyl methylcellulose ntxiv tuaj yeem txo qis, thiab tib cov dej tuav cov nyhuv tuaj yeem ua tiav.