HPMC puas tau yaj nyob hauv dej kub?

HPMC (HydroxyPropyyl methylcellulose) yog ib qho uas siv dej-soluble derivative, tshuaj, khoom noj khoom haus, khoom noj khoom haus. Nws tau txais los ntawm kev hloov kho tshuaj lom neeg ntawm cov cellulose ntuj. Nws cov qauv kev teeb tsa ua kom nws los ua qhov siab-viscosity daws hauv dej thiab muaj qee qhov solubility.

HPMC puas tau yaj nyob hauv dej kub?
HPMC tuaj yeem yaj hauv dej kub, tab sis nws cov txheej txheem sib cais yog qhov cuam tshuam zoo xws li qhov kub thiab txias ntawm HPMC, thiab kev hloov kho ntawm kev hloov kho. Feem ntau hais lus, HPMC tuaj yeem yaj tuaj ntawm chav tsev, tab sis yuav ua rau muaj kev sib cais ntawm cov kev kub siab dua.

1. Kev sib cais zuj zus
Lub tshuab ntawm HPMC dissolving hauv dej tsuas yog nyob ntawm lub hydrophilicity ntawm hydroxyl thiab cov pab pawg metyl thiab cov pab pawg ua haujlwm hauv nws cov lwg me. Dej lwg me me tuaj yeem cuam tshuam nrog cov pawg hydroxyl thiab methyl hauv hydrogen bonds, kom lub cellulose txoj saw hlau yog tsim. Yog li, HPMC muaj dej so zoo.

2. Cov nyhuv ntawm kev sib cais ntawm qhov kub ntawm solubility ntawm HPMC
Lub solubility ntawm HPMC feem ntau nce nrog kev nce qib. Nyob rau hauv cov kev mob siab, lub zog ua ke dej molecules nce, thiab lawv tuaj yeem sib tham nrog hydmc lwg me me, yog li nrawm lawv cov txheej txheem sib cais. Tshwj xeeb tshaj yog rau HPMC nrog cov dej kub siab dua, dej kub tuaj yeem pab nws yaj sai.

Txawm li cas los xij, lub solubility ntawm HPMC tsis tsuas yog nyob ntawm qhov kub thiab txias, tab sis kuj ntawm nws txoj kev hloov kho. Cov tshuaj sib txawv sib piv hauv pab pawg sib piv hauv HPMC Molecule cuam tshuam rau nws cov dej solubility thiab cov lej kawg. Piv txwv li, HPMC nrog ntau dua hydroxypropylopyl cov ntsiab lus tau muaj zog hydrophilicity thiab yog li ntawd yaj tau sai dua hauv dej.

3. Cov nyhuv ntawm qhov kub ntawm kev sib cais
Thaum muaj kub kub, txoj kev xaus ntawm HPMC yuav tau nrawm nrawm. Tshwj xeeb, nyob rau hauv ntau yam ntawm 60 ° C rau 90 ° C, txoj kev sib cais ntawm HPMC tau hloov kho HPMC tau cuam tshuam. Qhov no vim tias cov dej kub muaj peev xwm ua kom lub zog ua kom lub zog hydrogen ntawm cov qauv molecules, yog li kev txhawb nqa nws cov kev sib cais.

4. Teeb meem uas yuav ntsib thaum muaj kev sib cais
Txawm hais tias HPMC tuaj yeem yaj nyob rau hauv dej kub, yog tias qhov kub dhau lawm, HPMC hauv qee yam kev hloov pauv lossis cov kev hloov pauv tshiab tshwj xeeb tshaj yog thaum raug kub ntev ntev. Qhov no yuav cuam tshuam nws cov viscosity thiab muaj nuj nqi, tshwj xeeb yog hauv qee thaj chaw thov, qhov kev hloov pauv no yuav muaj kev cuam tshuam rau qhov zoo ntawm cov khoom kawg.

Yog tias cov dej kub ntxiv ntxiv thaum lub sij hawm sib cais dhau lawm, HPMC hmoov yuav ua tiav cov agglomerates hauv dej, uas ua rau tsis tiav kev txiav txim siab. Yog li ntawd, txhawm rau kom ntseeg tau tias kev ua tiav ntawm HPMC, nws feem ntau pom zoo kom siv cov dej sov thaum sib tov lossis siv cov kev tsim nyog siv cov kev sib txuam.

Daim ntawv thov cov piv txwv ntawm cov dej kub xaus ntawm HPMC
Hauv kev siv cov kev siv, dej kub solubility ntawm HPMC feem ntau siv. Piv txwv li, hauv kev tsim kho kev tsim kho, HPMC, raws li ib qho tseem ceeb admixture, muaj peev xwm muab cov lus nplaum zoo heev los ntawm cov dej. Thaum npaj cement slurry lossis cug, HPMC tuaj yeem pab txhim kho kev tsim kho kev ua haujlwm thiab tiv thaiv kev tawg.

Hauv kev lag luam kws tshuaj, HPMC tau siv dav hauv kev tsim cov khoom siv cov neeg sawv cev thiab cov tshuaj ntsiav rau cov tshuaj. Vim nws cov dej so zoo, HPMC tuaj yeem txiav maj hauv tib neeg lub cev thiab tso cov khoom xyaw siv tshuaj. Hauv cov txheej txheem no, qhov kub ntawm cov dej thiab cov kev sib cais ntawm HPMC ua lub luag haujlwm tseem ceeb.

Hauv kev lag luam khoom noj khoom haus, HPMC, yog feem ntau siv los ua cov ntaub tuab, nws tuaj yeem muab qhov xav tau zoo thiab kev ntxhib los mos, txhim kho lub saj thiab ruaj khov ntawm cov zaub mov.

HPMC tuaj yeem yaj nyob rau hauv dej kub, thiab nws solubility yog hais txog qhov kub ntawm dej, cov qauv molecular ntawm qhov hnyav thiab kev hloov kho tshuaj. Thaum muaj qhov kub siab dua, qhov kev cais tawm sai dua, feem ntau yog nyob rau hauv ntau ntawm 60 ° C rau 90 ° C, kev sib cais cuam tshuam yog qhov zoo tshaj plaws. Thaum siv dej kub kom yaj HPMC, nws yog ib qho tsim nyog los tswj cov dej kub thiab lub sijhawm ua kom tsis txhob muaj kev kub ntxhov ntawm nws qhov kev ua tau zoo.