Qhia:
Hydroxypropylencellulose (HPMC) yog cov dej-soluble polymer nquag siv nyob rau hauv ntau cov kev ua yeeb yaj kiab thiab kev ua yeeb yaj kiab zoo heev, khi thiab thickening cov khoom. Ntawm nws cov ntawv thov ntau, HPMC tau siv dav hauv kev tsim kho kev tsim kho rau nws cov dej tuav dej kom ceev.
Dej khaws cia yog ib qho khoom tseem ceeb uas txiav txim qhov ua tau zoo ntawm cov ntaub ntawv hauv tsev xws li cug, cement thiab pob zeb. Thaum HPMC ntxiv rau cov khoom siv no, nws tuaj yeem nce lawv lub peev xwm ua kom muaj peev xwm ua kom tiav, ua rau muaj kev ua kom zoo dua qub, txo lub zog.
Txawm li cas los xij, ntau yam cuam tshuam tuaj yeem cuam tshuam rau cov khoom siv ceev ceev ntawm HPMC. Cov ntawv no tshawb nrhiav cov xwm txheej no thiab lawv cuam tshuam rau cov dej khaws kev ua tau zoo HPMC.
Yam cuam tshuam rau cov dej khaws cia ntawm HPMC:
1. Molecular hnyav:
Lub cev hnyav molecular ntawm HPMC tseem ceeb cuam tshuam nws cov dej ua haujlwm. Lub cev hnyav dua HPMC feem ntau nthuav tawm cov dej kom zoo dua vim lawv cov khoom siv thickening zoo dua.
Lub cev hnyav molecular ntawm HPMC tuaj yeem tswj tau thaum lub sijhawm tsim khoom, thiab cov chaw tsim khoom tuaj yeem tsim cov qib HPMC nrog cov kev xav tau sib txawv.
2. Kub:
Qhov kub thiab txias yog lwm qhov tseem ceeb uas cuam tshuam rau lub peev xwm kav dej ntawm HPMC. Nyob rau ntawm qis kub, dej ua kom muaj peev xwm ua kom muaj peev xwm HPMC txo qis, ua rau cov neeg txom nyem thiab muaj kev mob siab.
Ntawm qhov tod tes, HPMC cov khoom pov thawj zoo dua nyob rau hauv cov kub thiab txias, ua rau kev siv huab cua sov sov thiab nyob rau lub caij ntuj sov.
3. PH:
Tus lej pH ntawm ib puag ncig uas HPMC siv yuav cuam tshuam rau nws lub peev xwm kav dej. HPMC cov khoom pov thawj zoo dua dej nyob hauv nruab nrab lossis me ntsis alkaline pal ib puag ncig.
Hauv ib puag ncig acidic, lub peev txheej kav dej ntawm HPMC txo, ua rau kev tsim kho tsis zoo thiab nce cov khoom tsim kho ntawm cov ntaub ntawv tsim kho.
4. DOSAGE:
Tus nqi HPMC ntxiv rau cov khoom siv hauv tsev tuaj yeem cuam tshuam ntau lub peev xwm kav dej. Qhov zoo tshaj plaws ntawm HPMC nyob ntawm cov ntaub ntawv tshwj xeeb thiab lwm yam khoom siv.
Tshaj HPMC yuav ua rau viscosity ntau ntxiv, txo cov txheej txheem txo thiab nce shrinkage. Ntawm qhov tod tes, tsis txaus ntawm HPMC ua rau cov dej tsis zoo, uas ua rau txo qis dua thiab nce qoob loo.
5. Stirring Sijhawm:
Lub sijhawm sib xyaw ntawm HPMC nrog cov khoom hauv tsev kuj cuam tshuam rau nws lub peev xwm kav dej. Cov sib tov txaus yuav tuaj yeem ua kom muaj kev sib cais ntawm HPMC hais thiab ua kom dej zoo dua.
Lub sijhawm tsis txaus tuaj yeem ua rau kev faib tawm hauv HPMC, uas tuaj yeem ua rau txo cov dej khaws cia thiab lwm yam teeb meem kev ua tau zoo.
6. Hom khoom siv hauv tsev:
Hom kev tsim kho siv hauv HPMC tseem cuam tshuam nws lub peev xwm los tuav dej. Cov khoom sib txawv yuav tsum muaj cov dej sib txawv ntawm cov dej sib txawv, thiab HPMC tuaj yeem ua kom tau raws li cov khoom yuav tsum tau ua.
Piv txwv li, tshuaj khib yuav tsum muaj peev xwm ua kom muaj peev xwm ua kom muaj peev xwm ua kom muaj peev xwm siv tau dej siab. Yog li ntawd, cov qib sib txawv ntawm HPMC tau tsim rau cov khoom siv hauv tsev sib txawv.
Hauv kev xaus:
Hauv cov ntsiab lus, dej khaws cia yog ib qho tseem ceeb ntawm cov khoom ntiag tug uas txiav txim siab cov ntaub ntawv ntawm lub tsev. HPMC yog ib tug neeg sawv cev zoo tshaj plaws, uas tuaj yeem txhim kho cov dej-khaws lub peev xwm ntawm cov cement, pob zeb ua pob zeb, pob zeb.
However, a variety of factors, such as molecular weight, temperature, pH, dosage, mixing time, and the type of construction material used in HPMC, can affect its water retention properties.
Cov chaw tsim khoom yuav tsum xav txog cov khoom lag luam thiab ua kom cov khoom siv HPMC thiab cov HPMC rau cov ntaub ntawv khaws tseg hauv tsev kom tiav thiab lwm cov txiaj ntsig kev ua tau zoo.
Lub sij hawm Post: Lub Yim Hli 08-2023