Thickening nyhuv ntawm hydroxypropyl methylcelulose

HydroxyPropyyl methylcellulose xaus zoo heev viscosity, uas tuaj yeem nce cov adhesion ntawm cov txheej ntub thiab txhim kho txheej txheem kev ua yeeb yam ntawm cug. nyob rau hauv cug. Cov nyhuv tuab ntawm cellulose ether kuj tseem tuaj yeem siv cov khoom siv fiber ntau, thiab tuaj yeem siv cov pob zeb fiber ntau thiab ua pob zeb hauv av, thiab cov pob zeb hauv qab.

HydroxyPropyyl methylcellulose nce qhov viscosity ntawm cov cement-based cov ntaub ntawv los ntawm cov viscosity ntawm cellulose ntawm cellulose ether. Lub viscosity ntawm cellulose ether mether tau soj ntsuam los ntawm qhov ntsuas "viscosity". Lub viscosity ntawm cellulose cellulose hais txog qee qhov kev ntsuas (xws li 20 ° (xws li kev sib tw ntawm qhov ntsuas kub

Viscosity yog ib qho tseem ceeb ntawm kev ua haujlwm los ntsuas kev ua tau zoo ntawm cellulose ether. Qhov ntau dua cov viscosity ntawm hydroxypropylencellulose cov tshuaj, qhov zoo dua cov nplaum rau lub substrate, qhov zoo dua cov kev tawm tsam sagging thiab anti-dispersing muaj peev xwm. Muaj zog, tab sis yog tias nws viscosity loj dhau lawm, nws yuav cuam tshuam rau lub ntsej muag fluidity thiab cov haujlwm ntawm cov khoom xyaw (xws li muab cov tshuab xyaw plastering thaum lub plastering coll siv). Yog li ntawd, viscosity ntawm cellulose siv nyob rau hauv qhuav-makov cug feem ntau yog 15,000 ~ 60,000 mpa. S-1, kev coj ua tus kheej thiab tus kheej-sib xyaw ua ke uas yuav tsum muaj cov xim ntau dua uas yuav tsum muaj viscoster qis ether.

Tsis tas li ntawd, cov nyhuv tuab ntawm hydroxypropylenpecellulose ntau cov dej los ntawm cov khoom siv xiss, yog li nce cov qoob loo ntawm cug.

Lub viscosity ntawm hydroxypropyl methylulose cov tshuaj nyob ntawm cov hauv qab no:

Cellulose ethere molecular hnyav (lossis qib polymerization) thiab kev kub siab, kev daws qhov kub, thiab kev sim cov qauv.

1. Lub siab dua qib ntawm polymerization ntawm cellulose ether, thiab ntau dua viscoous ntawm nws cov aqueesous ntawm nws cov kua aqueous;

2. Qhov siab dua cov tshuaj (lossis kev xav tau) ntawm cov tshuaj areous, tab sis saib xyuas kom tsis txhob muaj ntau yam kev siv tshuaj tua kab cug thiab pob zeb ua haujlwm;

3. Zoo li cov kua dej feem ntau, cov viscosity ntawm cellulose ntawm cellulose tshuaj yuav qis dua nrog qhov nce thiab ntau dua cov nyhuv ntawm qhov kub;

4. Cellulose ether cov kev daws teeb meem feem ntau yog pseudoplastics nrog shear thinning cov khoom. Lub siab dua cov shear tus nqi thaum ntsuas, qis dua viscosity.

Yog li no, txoj hlua khi ntawm cug kev ua haujlwm yuav raug txo vim kev ua haujlwm sab nraud, uas yog lub tshuaj khib tau ua haujlwm tau zoo thiab cohesion tib lub sijhawm. Txawm li cas los xij, thaum lub concentration ntawm cellulose cellulose muaj kev daws yog qhov tsawg thiab viscosity yog qhov tseem ceeb heev, nws yuav qhia cov yam ntxwv ntawm cov yam ntxwv ntawm Newtonian kua. Thaum cov kev txhim kho nce, txoj kev daws teeb meem yuav maj pom cov yam ntxwv ntawm pseudoplastic kua, thiab siab dua siab, pom tseeb ntawm pseudoplastic.