Raws li ib tug dav siv cov khoom siv hauv kev tsim kev lag luam, cultaub ua si cov qauv tseem ceeb thiab kev ua haujlwm. Lub fluidity ntawm cug yog ib qho ntawm cov ntsuas tseem ceeb uas cuam tshuam nws cov kev tsim kho. Kev ua kom zoo ua rau muaj kev yooj yim ntawm kev yooj yim ntawm kev tsim kho cov haujlwm thiab qhov zoo ntawm lub tsev. Txhawm rau txhim kho cov fluidity thiab cov haujlwm ntawm cug, ntau yam ntxiv tau siv rau kev hloov kho. Ntawm lawv,HydroxyPropyyl methylcellulose (HPMC), raws li ib txwm siv dej-soluble polymer compound, ua lub luag haujlwm tseem ceeb hauv kev txig. Cov.
Cov yam ntxwv yooj yim ntawm HPMC: HPMC yog cov dej-soluble cov khoom siv polymer ua los ntawm cov tshuaj hloov kho cov tshuaj. Nws muaj qhov zoo heev thickening, gelling, dej tuav thiab lwm yam khoom. Nws yog insoluble hauv dej, tab sis tuaj yeem tsim cov tshuaj tua hauv dej, yog li nws feem ntau dav siv hauv kev tsim kho, cov tshuaj pleev xim, tshuaj thiab lwm thaj chaw. Thaum siv ua cug tshuaj khib nyiab ntxiv, HPMC tuaj yeem txhim kho cov kua dej, cov dej ua haujlwm thiab ua haujlwm ntawm cug.
Lub tshuab hluav taws xob ntawm HPMC ntawm cug fluidity:
Thickening nyhuv: HPMC nws tus kheej muaj cov nyhuv tuab tuab tuab. Thaum ntxiv rau cug, nws tuaj yeem ua kom muaj kev ua kom viscosity ntawm lub tshuaj khib. Cov nyhuv thickening yog vim hpmc molecules sib sau cov qauv network hauv dej, uas nqus dej thiab nthuav dav, nce cov viscosity ntawm cov theem dej. Tus txheej txheem no tso cai rau cov fellity ntawm lub tshuaj khib hloov kom tau hloov kho. Thaum HPMC cov ntsiab lus nyob rau hauv lub tshuaj khib nyiab yog qhov siab, cov dej ntws dawb yuav raug txwv rau qee yam, yog li cov flucatity ntawm lub cug cug yuav qhia qee qhov kev hloov pauv.
Txhim kho cov dej cia: HPMC tuaj yeem ua ib zaj duab xis nyias muaj rau txo cov dej evaporation thiab txhim kho cov dej tshem ntawm lub cug. Tshuaj khib nrog cov dej ua kom zoo dua tuaj yeem tswj cov kev ua haujlwm tau siv sijhawm ntev dua, uas yog qhov tseem ceeb rau kev tsim kho thaum lub sijhawm kev tsim kho. Cov dej nplua zog tuaj yeem tiv thaiv cov tshuaj khib los ntawm kom qhuav tawm ntxov ntxov thiab txhim kho lub sijhawm tsim kho thiab ua haujlwm ua haujlwm ntawm lub cug.
Dispersion: HPMC tuaj yeem tsim cov tshuaj colloidal hauv dej, uas tuaj yeem txhim kho cov dispersion ntawm cort Cheebtsam. Lub fluidity ntawm kev tshuaj khib tsis tsuas yog cuam tshuam nrog kev sib faib ntawm cov cement, xuab zeb thiab admixtures, tab sis kuj zoo sib xws nrog kev rho tawm ntawm cov khoom sib xyaw no. Los ntawm kev kho tus nqi HPMC, cov Cheebtsam hauv lub tshuaj khib yuav raug tawg kis tau ntau yam ntxiv, yog li txhim kho kom zoo nkauj.
Cov nyhuv teeb meem: HPMC tuaj yeem txhawb nqa ib qho ntau txawm tias kev faib cov khoom hauv cov tshuaj khib thiab txhim kho kev ruaj ntseg ntawm nws cov qauv. Los ntawm kev txhim kho cov nyhuv teeb meem, HPMC tuaj yeem tswj cov fluist zoo ntawm kev tshuaj khib nyiab thaum lub sijhawm txo qis vim lub sijhawm qeeb.
Volinity ua cov nyhuv: qhov sib ntxiv ntawm HPMC kuj tseem tuaj yeem txhim kho cov volutity ntawm lub cug, ua kom nws yooj yim dua rau kev ua haujlwm thiab muaj cov khoom siv zoo dua thaum lub sijhawm tsim kho. Piv txwv li, thaum plastering ib lub phab ntsa, kom kom zoo thiab muaj kuab tuaj yeem txo qhov tshwm sim ntawm cov kab nrib pleb thiab txhim kho qhov zoo ntawm plastering.
Kev ua kom zoo ntawm HPMC nyob rau hauv colk hauv dej hloov kho hloov kho:
Kev tswj ntau tshuaj tswj: cov tshuaj ntawm HPMC ncaj qha cuam tshuam rau lub fluidity ntawm cug. Feem ntau hais lus, thaum tus nqi ntawm HPMC yog ib nrab, lub fluentity thiab dej ceev ceev ntawm cug yuav ua tau zoo dua. Txawm li cas los xij, HPMC ntau dhau tuaj yeem ua rau vortcosity ntawm lub cug ua kom muaj siab dhau, uas nyeg txo nws cov kua muag. Yog li ntawd, tus nqi HPMC ntxiv yuav raug tswj hwm raws li cov kev xav tau hauv cov ntawv thov.
Synergy nrog rau lwm tus neeg zoo nkauj: Ntxiv rau HPMC, lwm yam adrixtures, xws li superplasticizers, thiab lwm yam yuav zoo rau kev tshuaj khib. kev sib deev. Piv txwv li, superplasticizers tuaj yeem txo cov dej tawm hauv lub tshuaj khib thiab HPMC tuaj yeem txhim kho nws txoj kev tsim kho thaum tswj cov viscosity.
Kev hloov kho ntawm cov hom tshuaj Mac txawv txawv: sib txawv hom tshuaj cug muaj cov xim muaj xim sib txawv. Piv txwv li, plastering collch muaj ntau dua cov kev xav tau flu fluacity, thaum Masontry capage pays saib ntau dua rau nws txoj kev sib raug zoo thiab tuab. Thaum lub sijhawm tus txheej txheem no, tus nqi thiab hom HPMC ntxiv yuav tsum tau ua kom zoo thiab kho raws li cov cai ntawm cov muaj suab nrov sib txawv kom ntseeg tau tias muaj kev sib txawv zoo rau siab thiab sib npaug.
Raws li ib qho kev siv cug pheet ntxiv ntxiv,HPMCMuaj peev xwm hloov kho cov tshuaj khib nyiab los ntawm thickening, divening, thiab lwm yam ua rau lub tshuaj khib ntau dua thiab ruaj khov thaum tsim kho. Txawm li cas los xij, cov tshuaj ntawm HPMC yuav tsum tau kho kom raug raws li cov kev thov tshwj xeeb kom tsis txhob muaj kev siv ntau dhau los uas ua rau txo kom muaj fluidity. Nrog rau kev txhim kho txuas ntxiv ntawm kev ua tshuaj cug hauv kev tsim kho hauv kev tsim kho, cov kev cai tswj hwm ntawm HPMC muaj cov kev cia siab rau yav tom ntej.
Lub Sijhawm Post: Jan-10-2025