Cellulose Ether- Thickening thiab Thixotropy
Cellulose etherendows ntub mortar nrog viscosity zoo heev, uas tuaj yeem ua rau muaj kev sib txhuam ntawm cov khib nyiab ntub dej thiab cov txheej txheej, txhim kho kev ua haujlwm ntawm cov tshuaj khib nyiab, thiab yog siv dav hauv plastering mortar, ceramic pobzeb bonding mortar, thiab sab nrauv phab ntsa rwb thaiv tsev. Cov nyhuv thickening ntawm cellulose ether tuaj yeem ua rau kom muaj peev xwm tiv thaiv kev tawg thiab kev sib txuam ntawm cov ntaub ntawv tshiab, thiab tiv thaiv cov khoom stratification, sib cais, thiab seepage. Nws tuaj yeem siv rau fiber ntau reinforced pob zeb, underwater pob zeb, thiab nws tus kheej compacting pob zeb.
Cov nyhuv thickening ntawmcellulose etherntawm cov ntaub ntawv cement-based los ntawm viscosity ntawm cellulose ether tov. Nyob rau tib lub sijhawm, qhov siab dua qhov viscosity ntawmcellulose ether, qhov zoo dua qhov viscosity ntawm cov ntaub ntawv hloov cement-based. Txawm li cas los xij, yog tias qhov viscosity siab dhau lawm, nws yuav cuam tshuam rau cov khoom ntws thiab kev ua haujlwm ntawm cov khoom (xws li plastering riam). Self leveling mortar, nws tus kheej compacting qhob, thiab lwm yam. yuav tsum tau siab fluidity, thiab viscosity ntawm cellulose ether yog tsawg heev. Tsis tas li ntawd, cov nyhuv thickening ntawm cellulose ether tseem yuav ua rau kom cov dej xav tau ntawm cov cement substrate thiab ua rau kom cov tshuaj mortar.
Lub aqueous tov ntawm high viscosity cellulose ether muaj siab thixotropy, uas kuj yog ib tug yam ntxwv ntawm cellulose ether. Cov tshuaj aqueous ntawm methyl cellulose feem ntau muaj pseudoplastic thiab tsis thixotropic flow zog qis dua nws cov gel kub, tab sis qhia Newtonian ntws ntawm qis shear tus nqi. Txawm hais tias hom thiab qib ntawm kev hloov pauv ntawm cov khoom hloov pauv, pseudoplasticity nce nrog qhov nce ntawm qhov hnyav molecular lossis concentration ntawm cellulose ether. Yog li ntawd, tsuav yog qhov concentration thiab kub nyob twj ywm, cellulose ethers nrog tib qib viscosity (tsis hais txog MC,HPMC, HEMC) ib txwm nthuav tawm tib yam rheological zog. Thaum qhov kub thiab txias, cov qauv gel cov ntaub ntawv thiab siab thixotropic ntws tshwm sim.
Cellulose ethermanufacturers qhia rau koj tias cellulose ether nrog siab concentration thiab tsawg viscosity muaj thixotropy txawm nyob rau hauv gel kub. Cov cuab yeej no muaj txiaj ntsig zoo rau kev tsim kho ntawm mortar los kho nws cov qib thiab sagging. Nws yuav tsum raug sau tseg tias qhov siab dua qhov viscosity ntawmcellulose ether, qhov zoo dua nws cov dej tuav. Txawm li cas los xij, qhov siab dua qhov viscosity, qhov siab dua qhov txheeb ze molecular hnyav ntawm cellulose ether, thiab qhov sib thooj hauv nws cov solubility. Nws muaj kev cuam tshuam tsis zoo rau cov concentration thiab processability ntawm mortar.
Cellulose Ether- Ncua sijhawm
Cellulose ethertuaj yeem ua kom ntev lub sij hawm ntawm cov cement slurry los yog mortar, ncua lub hydration kinetics ntawm cov cement, thiab txhim kho lub neej kev pab cuam ntawm cov ntaub ntawv tshiab, yog li txhim kho qhov sib xws ntawm slump ntawm mortar thiab pob zeb. Qhov kev poob qis dhau sijhawm, tab sis nws kuj tseem tuaj yeem ncua kev tsim kho.
Post lub sij hawm: Aug-25-2023