Hydroxypropyl methylcellulose ether (HPMC) muaj cov dej tuav thiab cov teebmeem tuab hauv cov cement mortar thiab gypsum-based mortar, thiab tuaj yeem txhim kho qhov adhesion thiab ntsug tsis kam ntawm cov mortar.
Cov yam xws li qhov kub ntawm cov roj, qhov kub thiab txias, thiab qhov ceev ntawm cov roj ua rau muaj kev puas tsuaj rau qhov ceev ntawm cov dej evaporation hauv cov cement mortars thiab cov khoom lag luam gypsum. Yog li ntawd, tib yam tag nrho ntawm cov lag luam hydroxypropyl methylcellulose ether (HPMC) ntxiv rau kev tswj kom muaj dej nyob sib txawv ntawm lub caij mus rau lub caij.
Thaum nchuav cov pob zeb ua vaj tse, qhov cuam tshuam ntawm qhov dej xauv tuaj yeem hloov kho raws li qhov nce lossis txo qis ntawm qhov dej ntws siab. Qhov dej xauv ntawm hydroxypropyl methylcellulose ether ntawm qhov kub siab yog qhov tseem ceeb qhia txog qhov txawv ntawm qhov zoo ntawm hydroxypropyl methylcellulose ether.
Cov khoom zoo hydroxypropyl methylcellulose ether (HPMC) tuaj yeem daws qhov teeb meem ntawm kev xauv dej kub siab. Thaum lub caij kub siab, tshwj xeeb tshaj yog nyob rau hauv thaj chaw kub thiab noo noo thiab cov tsev tsim khoom chromatography, nws yog qhov tsim nyog los siv cov khoom zoo hydroxypropyl methylcellulose ether (HPMC) los txhim kho cov dej solubility ntawm cov slurry.
Qhov feem pua ntawm cov hydroxypropyl methylcellulose ether (HPMC) zoo heev yog sib xws heev, thiab nws cov methoxy thiab hydroxypropyl pawg tau faib sib npaug zos rau ntawm cov qauv molecular ntawm methyl cellulose, uas tuaj yeem txhim kho lub cim ntawm cov pa oxygen ntawm cov hydroxyl thiab ether bonds. Lub peev xwm ntawm cov bonds covalent ua haujlwm.
Nws tuaj yeem tswj tau qhov dej evaporation uas tshwm sim los ntawm huab cua kub thiab ua tiav qhov cuam tshuam ntawm kev xauv dej siab. Cov khoom zoo Hydroxypropyl Methylcellulose Ether (HPMC) pom muaj nyob rau hauv cov mortars sib xyaw thiab plaster ntawm paris crafts.
Txhua yam khoom khov kho raug kaw ua ib daim zaj duab xis ntub. Cov dej ib txwm raug tso tawm qeeb qeeb dhau lub sijhawm ntev thiab dhau los ua qhov sib xyaw ua ke nrog cov khoom inorganic thiab cov khoom collagen kom ntseeg tau tias muaj lub zog sib txuas thiab lub zog tensile.
Yog li ntawd, nyob rau hauv cov chaw tsim kho kub siab thaum lub caij ntuj sov, txhawm rau kom ua tiav qhov txiaj ntsig tiag tiag ntawm kev txuag dej, tib neeg yuav tsum ntxiv cov khoom zoo hydroxypropyl methylcellulose ether (HPMC) raws li daim ntawv qhia zais cia, txwv tsis pub lawv yuav tsis muaj dej vim tsis muaj dej txaus. Cov teeb meem zoo ntawm cov khoom xws li kev khov kho, txo qis lub zog compressive, tawg, cua bulges, thiab lwm yam ua rau qhuav ntau dhau.
Qhov no kuj ua rau cov neeg ua haujlwm nyuaj rau kev tsim kho. Thaum qhov kub txo qis, qhov ntxiv ntawm hydroxypropyl methylcellulose ether (HPMC) maj mam txo qis kom ua tiav cov dej noo zoo ib yam.
Lub sijhawm tshaj tawm: Lub Ob Hlis-06-2024