Cellulose etherXaus cug nph dej nrog cov tshuaj tua kab zoo heev, txhim kho cov tshuaj cug, txhim kho kev sib xyaw sab nraud, kev sib xyaw sab nraud thiab cov pob zeb sib xyaw. Lub thickening nyhuv ntawm cellulose ether kuj tseem tuaj yeem tiv thaiv kev sib tsoo, kom tiv thaiv cov khoom siv hluav taws xob thiab ua pob zeb ua kom zoo nkauj thiab ua kom tawg.
Cellulose etherUa kom cov viscosity ntawm cov cement-based cov ntaub ntawv los ntawm viscosity ntawm cellulose tshuaj ether. Feem ntau siv "viscosity" no metic los soj ntsuam cov cellulose celluve, ntsuas (20 ℃) thiab tig ceev, xws li 20 RPM) tej yam kev mob, nrog cov kev cai ntsuas ntsuas, xws li tig mus visccometer parcosity qhov tseem ceeb. Viscosity yog ib qho tseem ceeb ntawm kev ntsuas ntawm cov khoom siv ether thiab cellulose ntawm cov xis nyob thiab ua kom muaj zog dua thiab muaj zog dua cov kev tawm tsam muaj zog, Tab sis yog tias lub viscosity loj dhau lawm, tuaj yeem cuam tshuam cov yaum cov khoom siv mus taus thiab kev siv cov tshuaj khib nyiab nplaum nplaum). Yog li ntawd, viscosity ntawm cellulose siv nyob rau hauv qhuav-makov cug feem ntau yog 15,000 ~ 60,000 mpa. S-1, thiab viscosity ntawm cellulose ntawm cellulose ntawm cellulose ntawm tus kheej txoj kev sib hloov tus kheej thiab kev sib xyaw ua ke nrog cov kev xav tau ntawm lub siab dua. Tsis tas li ntawd, cov nyhuv tuab ntawm cellulose ether yuav ua rau cov khoom siv dej xiss, yog li nce cov zis ntawm kev tshuaj khib. Lub viscosity ntawm lub cellulose ether cov tshuaj nyob ntawm cov molecular hnyav (lossis kev ntsuas kub ether, daws qhov kub, thiab txoj kev sim. Lub siab dua Polymerization Qib ntawm cellulose ether, qhov ntau dua cov molecular hnyav, qhov ntau dua cov aav cov kua; Qhov siab dua cov tshuaj (lossis kev xav tau) ntawm cellulose ether, ntau dua qhov kev xaiv ntawm kev xaiv ntau, cuam tshuam rau kev ua yeeb yam ntawm cug thiab pob zeb. Zoo li cov kua dej feem ntau, cov viscosity ntawm cellulose ntawm cov tshuaj ether yuav txo qis nrog qhov nce ntxiv ntawm cellulose ether, ntau dua qhov kub; Cellulose ether cov tshuaj feem ntau yog pseudoplastic lub cev nrog cov cuab yeej ntawm shear thinning. Lub siab dua cov shear tus nqi, qis dua viscosity.
Yog li ntawd, txoj hlua khi ntawm cug yuav raug txo los ntawm kev quab yuam sab nraud, uas yog qhov zoo rau kev hloov tshuaj cug, ua tshuaj khib tau muaj cov haujlwm ua haujlwm zoo thiab cohesion. Txawm li cas los xij, cellulose ether daws teeb meem yuav qhia cov yam ntxwv kua mis tshiab thaum muaj kuab heev thiab lub viscosity yog qhov tsawg heev. Thaum cov kab ke nce, kev daws teeb meem maj mam nthuav tawm cov yam ntxwv zoo pseudoplastic kua cov yam ntxwv, thiab ntau pom tseeb ntawm pseudoplastic.
Lub Sijhawm Post: Jun-14-2022