qhia txog:
Hydroxypropylmethylcellulose (HPMC) yog ib hom polymer uas yaj tau hauv dej uas feem ntau siv rau hauv ntau yam kev lag luam thiab kev siv tshuaj vim nws cov yam ntxwv zoo heev rau kev tsim zaj duab xis, kev khi thiab kev tuab. Ntawm nws ntau daim ntawv thov, HPMC yog siv dav hauv kev lag luam kev tsim kho vim nws muaj peev xwm khaws dej.
Kev khaws dej yog ib qho tseem ceeb uas txiav txim siab qhov ua tau zoo ntawm cov ntaub ntawv siv hauv tsev xws li mortar, cement thiab concrete. Thaum ntxiv HPMC rau cov ntaub ntawv no, nws tuaj yeem ua rau lawv muaj peev xwm khaws dej ntau dua, ua rau muaj kev ua haujlwm zoo dua, txo qis kev ntsws thiab ua kom muaj zog dua.
Txawm li cas los xij, muaj ntau yam uas yuav cuam tshuam rau cov khoom khaws dej ntawm HPMC. Tsab xov xwm no tshawb nrhiav cov yam no thiab lawv qhov cuam tshuam rau kev ua haujlwm khaws dej ntawm HPMC.
Cov yam tseem ceeb uas cuam tshuam rau kev khaws dej ntawm HPMC:
1. Qhov hnyav ntawm cov molecule:
Qhov hnyav molecular ntawm HPMC cuam tshuam loj heev rau nws cov khoom khaws dej. Qhov hnyav molecular siab dua HPMCs feem ntau qhia txog kev khaws dej zoo dua vim lawv cov khoom tuab zoo dua.
Qhov hnyav molecular ntawm HPMC tuaj yeem tswj tau thaum lub sijhawm tsim khoom, thiab cov chaw tsim khoom tuaj yeem tsim cov qib sib txawv ntawm HPMC nrog cov hnyav molecular sib txawv kom tau raws li cov kev xav tau tshwj xeeb.
2. Kub:
Kub yog lwm yam tseem ceeb uas cuam tshuam rau lub peev xwm khaws dej ntawm HPMC. Thaum kub qis, lub peev xwm khaws dej ntawm HPMC txo qis, ua rau tsis ua haujlwm zoo thiab ua rau ntsws ntau ntxiv.
Ntawm qhov tod tes, HPMC ua kom pom tseeb tias nws khaws dej tau zoo dua ntawm qhov kub siab, ua rau nws tsim nyog siv rau hauv huab cua sov thiab thaum lub caij ntuj sov.
3. pH:
Tus nqi pH ntawm qhov chaw uas HPMC siv kuj yuav cuam tshuam rau nws lub peev xwm khaws dej. HPMC ua rau pom tias nws khaws dej tau zoo dua hauv qhov chaw pH nruab nrab lossis me ntsis alkaline.
Hauv ib puag ncig acidic, lub peev xwm khaws dej ntawm HPMC txo qis, ua rau kev tsim kho tsis zoo thiab ua rau cov ntaub ntawv tsim kho me me.
4. Kev Noj Tshuaj:
Qhov ntau ntawm HPMC ntxiv rau hauv cov khoom siv hauv tsev tuaj yeem cuam tshuam rau nws lub peev xwm khaws dej. Qhov ntau ntawm HPMC zoo tshaj plaws nyob ntawm daim ntawv thov tshwj xeeb thiab lwm yam khoom siv.
HPMC ntau dhau yuav ua rau viscosity ntau dua, ua haujlwm tsawg dua thiab ua rau ntsws ntau dua. Ntawm qhov tod tes, tsis txaus HPMC ua rau tsis khaws dej zoo, uas ua rau lub zog tsawg dua thiab tawg ntau dua.
5. Lub sijhawm nplawm:
Lub sijhawm sib tov ntawm HPMC nrog cov ntaub ntawv tsim kho kuj cuam tshuam rau nws lub peev xwm khaws dej. Lub sijhawm sib tov txaus tuaj yeem ua kom muaj kev sib kis ntawm cov khoom HPMC thiab khaws dej zoo dua.
Lub sijhawm sib tov tsis txaus tuaj yeem ua rau cov khoom faib tsis zoo ntawm HPMC, uas tuaj yeem ua rau kom tsis txhob muaj dej khaws cia thiab lwm yam teeb meem kev ua tau zoo.
6. Hom khoom siv hauv tsev:
Hom khoom siv hauv HPMC kuj cuam tshuam rau nws lub peev xwm tuav dej. Cov ntaub ntawv sib txawv xav tau cov dej khaws cia sib txawv, thiab HPMC tuaj yeem tsim kho kom ua tau raws li cov khoom siv tshwj xeeb.
Piv txwv li, cov mortar xav tau lub peev xwm khaws dej siab, thaum cov pob zeb ua vaj tse xav tau lub peev xwm khaws dej qis. Yog li ntawd, ntau qib ntawm HPMC tau tsim rau cov ntaub ntawv tsim kho sib txawv.
xaus lus:
Hauv kev xaus, kev khaws dej yog ib qho khoom tseem ceeb uas txiav txim siab qhov ua tau zoo ntawm cov ntaub ntawv tsim kho. HPMC yog ib tus neeg sawv cev zoo heev uas khaws dej, uas tuaj yeem txhim kho lub peev xwm khaws dej ntawm cov cement, mortar, concrete thiab lwm yam ntaub ntawv tsim kho.
Txawm li cas los xij, ntau yam tseem ceeb, xws li qhov hnyav molecular, kub, pH, koob tshuaj, lub sijhawm sib tov, thiab hom khoom siv hauv HPMC, tuaj yeem cuam tshuam rau nws cov khoom khaws dej.
Cov chaw tsim khoom yuav tsum xav txog cov yam no thiab kho cov khoom thiab qhov ntau ntawm HPMC rau cov ntawv thov kev tsim kho tshwj xeeb kom ua tiav qhov kev khaws cia dej zoo tshaj plaws thiab lwm yam txiaj ntsig kev ua tau zoo.
Lub sijhawm tshaj tawm: Lub Yim Hli-08-2023