Cellulose ether hpmc muaj lub luag haujlwm ntawm kev khaws dej thiab thickening hauv cement mortar thiab gypsum-based mortar, uas tuaj yeem txhim kho qhov adhesion thiab ntsug tsis kam ntawm cov ntaub ntawv mortar.
Cov yam xws li qhov kub ntawm cov roj, qhov kub thiab qhov ceev ntawm huab cua muaj qhov cuam tshuam tsis zoo rau qhov nrawm ntawm kev ua kom cov dej noo ntawm cov cement mortar thiab gypsum raws li cov khoom. Yog li ntawd, muaj qee qhov sib txawv hauv kev ntxiv cov khoom HPMC tib yam kom tswj tau cov dej zoo hauv txhua lub caij.
Thaum nchuav cov pob zeb ua vaj tse, qhov cuam tshuam ntawm dej tuaj yeem hloov kho tau los ntawm kev nce thiab txo qhov ntws ntawm cov feem. Tus nqi khaws dej ntawm methyl cellulose ether ntawm qhov kub siab yog tus nqi ntsuas tseem ceeb los qhia qhov zoo ntawm methyl cellulose ether.
Cov khoom zoo HPMC tuaj yeem daws tau 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 kev tsim kho chromatography, HPMC zoo yog qhov xav tau los txhim kho kev khaws dej ntawm cov slurry.
Cov HPMC zoo heev muaj qhov sib piv zoo heev, thiab nws cov pab pawg methoxyl thiab hydroxypropyl tau faib sib npaug zos rau ntawm cov saw hlau molecular ntawm cellulose, uas tuaj yeem txhim kho lub peev xwm ntawm cov pa oxygen los tsim cov ntawv cog lus covalent ntawm hydroxyl thiab ether.
Nws tuaj yeem tswj tau qhov dej evaporation uas tshwm sim los ntawm huab cua kub thiab ua tiav qhov dej xauv zoo. Cov methylcellulose zoo HPMC tuaj yeem siv rau hauv cov khoom siv tes ua sib xyaw thiab plaster ntawm paris.
Muab tag nrho cov khoom khov kho ua ib zaj duab xis ntub dej, thiab cov dej noo hauv cov txheej txheem yuav raug tso tawm qeeb qeeb rau lub sijhawm ntev, thiab ua rau cov tshuaj inorganic thiab cov ntaub ntawv collagen kom ntseeg tau tias lub zog sib txuas thiab lub zog tensile.
Yog li ntawd, nyob rau hauv qhov chaw ua haujlwm kub lub caij ntuj sov, txhawm rau kom ua tiav cov txiaj ntsig ntawm kev txuag dej, peb yuav tsum ntxiv cov khoom zoo HPMC raws li daim ntawv qhia, txwv tsis pub, nws yuav tshwm sim los ntawm tsis muaj kev khov kho, txo qis zog, tawg, roj nruas thiab lwm yam teeb meem zoo ntawm cov khoom. Ua rau qhuav sai dhau.
Qhov no kuj ua rau muaj kev nyuaj rau cov neeg ua haujlwm tsim kho. Thaum qhov kub txo qis, qhov ntau ntawm HPMC ntxiv maj mam txo qis kom ua tiav cov dej noo zoo ib yam.
Lub sijhawm tshaj tawm: Tsib Hlis-11-2023