Taw qhia nrog kev txhim kho txuas ntxiv ntawm kev tsim kho cov kev tsim kho cov kev tsim kho, lub zog, kav siv ntawm cov pob zeb ua tau txais dav dav. Hais txog kev txhim kho cov kev ua tau zoo ntawm cov pob zeb ua, kev siv infixtures yog ib qho tseem ceeb txhais tau. HydroxyPropyyl methylulose (HPMC), raws li ib qho kev ua yeeb yam cellulose, tau siv dav dav siv hauv kev tsim kho, kev ua yeeb yam, tshuaj khib, tshuaj khib thiab sib xyaw thiab lwm daim teb. Raws li cov dej-soluble cellulose ether, nws muaj cov dej ua kom zoo, dej tuav, zaj duab xis thiab txhim kho kev tsim kho kev ua haujlwm. Txawm li cas los xij, cov nyhuv ntawm HPMC ntawm cov ntom ntom ntom yog tseem yog lub ntsiab lus tsim nyog kawm.
Cov Khoom Yooj Yim ntawm HPMC HPMC yog lub ntuj polymer teb soluble hauv dej, feem ntau tau los ntawm cellically hloov cellulose, nrog qee yam hydrophilicity thiab adhesion. Hauv kev ua vaj tse, HPMC feem ntau yog lub luag haujlwm ntawm thickening, dej tuav, txhim kho fluentity, thiab txuas lub sijhawm ua haujlwm. Nws tuaj yeem txhim kho cov kua txiv thiab kev tsim kho cov cement paste, yog li kev txhim kho kev ua haujlwm ntawm cov pob zeb ua.
Cov nyhuv ntawm HPMC ntawm cov qhob zog ntom ntom
Dej khaws cia ntawm HPMC ntawm Maas muab tshuaj pleev HPMC muaj cov txheej txheem kev ua tau zoo ntawm dej thiab tswj cov dej muab tshuaj txhuam. Tshwj xeeb tshaj yog nyob rau hauv kev kub siab lossis qhuav ib puag ncig, cov dej khaws cov nyhuv HPMC yog qhov tseem ceeb tshaj plaws. Cov tshuaj hydration ntawm cov cement muab kev txhawb nqa txaus. Yog hais tias cov dej yaj sai, cov caias ua rau cov dej xis yuav tsis muaj cov hws huv, uas yuav cuam tshuam rau cov qhob. HPMC qeeb lub evaporation dej kom ntseeg tau tias cov caias ua tau tias cov caias ua tuaj yeem ua kom muaj kev kub taub hau, yog li kev txhim kho lub ntom ntom.
Cov nyhuv ntawm HPMC ntawm Kev Ua Vaj Tse HPMC, raws li cov tuab dua, tuaj yeem txhim kho cov hauv cov qhob. Tus nqi ntawm HPMC tsim nyog ua tau cov pob zeb ua tau zoo thiab txo cov cais tawm ntawm cov pob zeb ua thaum lub sijhawm pob zeb. Qhob nrog fluidity zoo dua tuaj yeem sau cov pwm ua kom zoo dua cov pwm thaum lub ntsej muag, kom ntau dua ntawm cov npuas thiab voids, thiab txhim kho lub ntom ntom. Txawm li cas los xij, yog tias HPMC ntau npaum li cas, nws tuaj yeem ua rau cov khoom siv viscosity ntawm cov pob zeb ua kom muaj peev xwm ua kom tiav, yog li cuam tshuam rau qhov ceev.
HPMC qhov tawg ntawm Caas hais tus nqi ntawm HPMC tsim nyog txhim kho qhov tsis txaus ntseeg ntawm kev tso dej ntawm Caas ua rau cov cement muab tshuaj txhuam. Cov kev faib cov khoom sib faib ntawm Caas Anatles pab txo cov agglomeration ntawm cov loj hauv pob zeb, yog li txo porosity thiab txhim kho cov compactness ntawm qhob. Yog tias HPMC noj ntau dhau, nws yuav ua rau muaj kev sib raug zoo ntawm Caas muab dhau los ntawm Measing ntawm Masas hais thiab cov compactness ntawm pob zeb.
Kev cuam tshuam ntawm HPMC ntawm cov txheej txheem tawv ntawm pob zeb HPMC plays ua kom muaj kev sib zog ntawm cov dej khov kho, yog li kev txhim kho cov txheej txheem cement Kev nce qib qeeb ntawm kev ua kom dej siab qeeb ntawm cov txiv hmab txiv ntoo yuav pab ua kom cov cement cement gel, txo qhov kev tsim ntawm cov kab ke, thiab txhim kho kev sib txuas ntawm cov pob zeb tag nrho. Txawm li cas los xij, yog tias HPMC noj ntau dhau, nws yuav ua rau muaj kev ncua ntau hauv cov txheej txheem hydration, cuam tshuam rau kev txhim kho lub zog thiab cov qauv kev ruaj khov ntawm cov pob zeb.
Cov nyhuv ntawm HPMC ntawm cov qhob impermetability txij li hpmc muaj cov khoom siv hydrophilicity, yog li txhim kho cov pob zeb ua kom tsis muaj zog. Los ntawm kev ua kom zoo dua HPMC ntau npaum li cas, cov txheej txheem sib txawv ntawm cov pob zeb ua tau zoo dua qub, cov tshuaj lom neeg tuaj yeem raug txo kom zoo dua qub, thiab cov khoom siv tsis tau zoo, thiab cov khoom siv tsis tau zoo, thiab cov pob zeb ua kom zoo dua qub tuaj yeem hloov kho.
Qhov zoo tshaj plaws ntawm HPMC muab cov kev tshawb fawb raws li kev sim, cov txiaj ntsig ntawm HPMC noj ntawm cov qhob yog bidirectional, thiab nws tsis tuaj yeem qis dhau los lossis siab dhau. Thaum cov tshuaj ntau dhau, cov nyhuv tuab heev, cov nyhuv tuab tuab ntawm HPMC tsis txaus thiab nws tsis tuaj yeem txhim kho kom zoo txog cov dej thiab cov dej khaws cia; Thaum cov tshuaj ntau dhau, nws yuav ua rau muaj viscosity heev ntawm kev ua vaj tse, muaj kev ua haujlwm zoo, thiab ua rau Voids thiab qhov. Yog li ntawd, cov nqi ntawm HPMC yuav tsum tau tswj nyob rau hauv ib qho kev tsim nyog. Raws li cov ntaub ntawv sib txawv, cov nqi ntawm HPMC feem ntau tswj tau ntawm 0.1% thiab 0.3%. Qhov siab dhau los lossis tsawg dhau yuav muaj kev cuam tshuam tsis zoo ntawm qhov ntom ntom thiab lwm yam khoom ntawm cov pob zeb.
Cov nyhuv ntawm HPMC noj ntawm lub ntom ntom ntawm cov qhob hauv nws cov kev cai tswj cov nyhuv rau cov dej khov thiab tawg ntawm cov txheej txheem ua kom muaj kev ua kom tawv nqaij. Txoj cai HPMC tuaj yeem txhim kho kev tsim kho kev tsim kho ntawm cov pob zeb ua kom nruj, txhim kho lub ntom ntom, thiab txhim kho nws lub zog thiab kav ntev. Txawm li cas los xij, dhau heev lossis dhau tsawg dua yuav muaj kev cuam tshuam tsis zoo rau lub ntom ntom. Yog li ntawd, hauv cov ntawv thov kev siv, cov tshuaj ntau ntawm HPMC yuav tsum tau xaiv raws li kev siv thiab ib puag ncig kev ua haujlwm kom ua tiav cov kev ua tau zoo tshaj plaws.
Lub sijhawm Post: Feb-15-2025