Hauv cov cement mortar thiab gypsum-based slurry, hydroxypropyl methylcellulose feem ntau ua lub luag haujlwm ntawm kev khaws cia dej thiab thickening, thiab tuaj yeem txhim kho qhov adhesion thiab sag tsis kam ntawm slurry.
Cov yam xws li qhov kub ntawm huab cua, qhov kub thiab qhov ceev ntawm cua yuav cuam tshuam rau qhov dej ntws hauv cov cement mortar thiab cov khoom siv gypsum. Yog li ntawd, nyob rau ntau lub caij sib txawv, muaj qee qhov sib txawv ntawm cov dej khaws cia ntawm cov khoom uas muaj tib qho hydroxypropyl methylcellulose ntxiv. Hauv kev tsim kho tshwj xeeb, cov dej khaws cia ntawm cov slurry tuaj yeem hloov kho los ntawm kev nce lossis txo qhov ntau ntawm HPMC ntxiv. Kev khaws cia dej nyob rau hauv qhov kub siab yog qhov qhia tseem ceeb los paub qhov txawv ntawm qhov zoo ntawm hydroxypropyl methylcellulose ether.
Cov khoom zoo heev hydroxypropyl methylcellulose series tuaj yeem daws tau qhov teeb meem ntawm kev khaws dej hauv qab qhov kub siab. Hauv lub caij kub siab, tshwj xeeb tshaj yog nyob rau hauv thaj chaw kub thiab qhuav thiab kev tsim cov txheej nyias nyias ntawm sab hnub ci, HPMC zoo yog qhov yuav tsum tau ua kom zoo dua qhov khaws dej ntawm cov slurry. HPMC zoo muaj qhov sib xws zoo heev. Nws cov pab pawg methoxy thiab hydroxypropoxy tau faib sib npaug zos raws li cov saw hlau molecular cellulose, uas tuaj yeem txhim kho lub peev xwm ntawm cov pa oxygen ntawm cov hydroxyl thiab ether bonds los koom nrog dej los tsim cov hydrogen bonds. , yog li ntawd cov dej dawb dhau los ua dej khi, yog li kom tswj tau qhov evaporation ntawm dej los ntawm huab cua kub siab, thiab ua tiav qhov khaws dej siab.
Cov hydroxypropyl methylcellulose zoo tuaj yeem sib xyaw thiab sib kis tau zoo hauv cov cement mortar thiab gypsum-based cov khoom, thiab qhwv txhua yam khoom khov kho, thiab tsim cov zaj duab xis ntub dej, thiab cov dej noo hauv lub hauv paus maj mam tso tawm dhau lub sijhawm ntev, thiab cov tshuaj tiv thaiv hydration nrog cov khoom siv inorganic gelling kom ntseeg tau tias lub zog sib txuas thiab lub zog compressive ntawm cov khoom.
Yog li ntawd, nyob rau hauv kev tsim kho lub caij ntuj sov kub siab, txhawm rau kom ua tiav cov txiaj ntsig khaws cia dej, nws yog qhov tsim nyog los ntxiv cov khoom lag luam HPMC zoo hauv qhov ntau txaus raws li cov mis, txwv tsis pub, yuav muaj dej tsis txaus, txo lub zog, tawg, hollowing thiab shedding los ntawm kev qhuav ntau dhau. Cov teeb meem, tab sis kuj ua rau muaj teeb meem kev tsim kho ntawm cov neeg ua haujlwm. Thaum qhov kub poob qis, qhov ntau ntawm HPMC ntxiv tuaj yeem maj mam txo qis, thiab tib yam txiaj ntsig khaws cia dej tuaj yeem ua tiav.
Lub sijhawm tshaj tawm: Plaub Hlis-13-2023