Cellulose ether (CE) yog hloov cov ntaub ntawv polymer tau los ntawm cov khoom siv ntuj ntuj thiab yog siv dav hauv cov khoom siv hauv tsev, tshuaj, tshuaj pleev ib ce thiab lwm thaj teb. Muaj ntau hom ntawm cov cellulose muaj kev hais ua ke, cov uas muaj xws li hydroxypropylulose (HECMC), HEC) thiab Methylcellulose (MC). Hauv ntau cov ntawv thov, cellulose cov neeg hais ua tau zoo nyob rau cov kev ua tsis tau thiab ua tau zoo, ua ib qho tseem ceeb hauv kev txhim kho lub neej zoo thiab kev pabcuam lub neej.
1. Txhim kho kev tsim kho kev tsim kho
Hauv kev ua haujlwm hauv tsev, cov neeg ua haujlwm pab cuam cellulose feem ntau siv ua cov thickeners, dej tuav cov neeg sawv cev thiab cov neeg sawv cev. Hauv cov tshuaj khib, gypsum thiab casas raws li cov ntaub ntawv ntawm cellulose ntawm cov khoom haus dej haus, zam kev los ntshav thiab cais cov teeb meem. Cellulose ether tseem yuav txhim kho lub zog ntawm cov khoom siv, kom tau faib cov khoom siv thiab muaj adhesion zoo dua rau substrate.
HydroxyPropyyl methylulose (HPMC) tuaj yeem txhim kho kev ua haujlwm cug, ua rau nws yooj yim dua rau kev siv swb, tshwj xeeb yog kev tsim kho. Tsis tas li ntawd, cov nyhuv retarding ntawm cellulose ether tuaj yeem txuas lub sijhawm ua haujlwm ntawm kev tsim kho ntawm cov haujlwm ua haujlwm. Cov nta no txuas ntxiv txhim kho kev tsim kho kev ua haujlwm zoo thiab qhov zoo hauv cov nqe lus ntawm kev txo cov khoom siv pov tseg thiab ua tsis raug.
2. Cov dej zoo khaws cia
Ib qho ntawm cov khoom tseem ceeb ntawm cellulose muaj cov neeg ua haujlwm yog lawv cov khoom siv dej zoo heev. Dej khaws cia yog hais txog kev muaj peev xwm ntawm cellulose ethoting ntawm cov khoom siv noo noo, yog li ntseeg tau lub zog thiab kav ntev ntawm cov khoom siv tom qab kev tsim kho. Hauv cov ntaub ntawv hauv tsev xws li cov khoom siv cement thiab gypsum raws li cov tshuaj tiv thaiv uas tsis muaj kev cuam tshuam rau cov dej tawg thiab tsis muaj zog los ntawm kev poob dej.
Dej khaws cia yog qhov tshwj xeeb yog qhov tseem ceeb rau kev siv cov roj nyias nyias. Piv txwv li, thaum lub tiling txheej txheem, cellulose neeg muaj peev xwm pab tiv thaiv kom noo hauv kev ua kom nrawm nrawm, yog li kev txhim kho cov nplaum thiab qhov ntev ntawm cov vuas. Ib yam li ntawd, nyob hauv thaj teb ntawm cov txheej txheem, cellulose muaj kev hais ua cell tuaj yeem ua ib qho kev sib tw thaum lub neej ntawm txheej thiab txo qhov xav tau tom qab txij nkawm.
3. Txhim kho huab cua tsis kam ntawm cov ntaub ntawv
Daim ntawv thov ntawm cov neeg muaj kev hais ua cellulose tseem tuaj yeem txhim kho cov khoom siv huab cua, piv txwv li cov kev tiv thaiv ib puag ncig xws li noo noo, UV Rays, Huab Cua thiab Huab Cua sov. Qhov no yog qhov tseem ceeb rau lub sijhawm ntev ntev ntawm cov ntaub ntawv lub tsev. Piv txwv li, daim ntawv thov cov neeg ua haujlwm cellulose hauv cov txheej txheem ua yeeb yam zoo rau cov txheej txheem zoo nkauj thiab tiv thaiv kev sib tw thiab kev laus.
Nyob rau hauv cov ntawv tso cai, cellulose ether tuaj yeem txhim kho cov dej kom huv, thiab txo cov kev phom sij shrinkage, yog li txhim kho kom khov-thaws tsis kam thiab huab cua tsis kam. Qhov no tso cai rau lub tsev tswj hwm nws cov qauv kev ncaj ncees thiab kev ua kom zoo nkauj rau lub sijhawm ntev dua nyob rau hauv kev nyab xeeb huab cua.
4. Zoo heev thickening thiab rheology kho
Lub thickening nyhuv ntawm cellulose kev daws teeb meem tso cai rau nws los kho qhov ruaj khov, thiab cov txiaj ntsig zoo li siv cov khoom ruaj khov thiab yooj yim ntawm kev siv cov khoom siv. Hauv cov xim pleev xim thiab cov xim tha xim, cellulose tsim kho cov xim viscosity los xyuas kom nws tsis sag lossis tsim ib qho du, txawm tias txheej. Qhov no tsis tsuas yog txhim kho cov kev tsim tawm ntawm kev tsim kho, tab sis kuj tseem txhim kho cov coj tsis kam thiab ua kom tawg ntawm cov txheej.
Cellulose muaj kev hais ua haujlwm tseem ua lub luag haujlwm tseem ceeb hauv kev ntsuas cov khoom hauv tsev. Nws cov thickening thiab rheological hloov kho kom ntseeg tau tias cov khoom siv tau zoo thiab tsis xws luag, thiab thaum kawg txhim kho lub tiaj tiaj thiab ruaj khov ntawm hauv av.
5. Txhim khu cov khoom tawg tsis kam ntawm cov ntaub ntawv
Cov dej tuav cia thiab cov kev cuam tshuam thickening ntawm cellulose kev pab tswj cov khoom kom qhuav ntawm cov teeb meem uas poob ntau dhau. Tshwj xeeb tshaj yog nyob rau hauv colleg thiab MAAs raws cov ntaub ntawv, cellulose ether tuaj yeem yaum cov khoom hauv cov khoom siv thiab txo qhov tshwm sim ntawm shrinkage tawg. Tsis tas li ntawd, nws cov khoom txhim kho kom tau txais cov khoom siv rau cov nyiaj sib haum zoo dua nrog cov substrate thiab txhim kho cov kab nrib pleb ntawm cov qauv tag nrho.
Hauv Gypsum-based cov ntaub ntawv, cov neeg muaj kev muaj ua neeg muaj kev pab txwv tsis pub tawm los ntawm kev ua dej ua kom sai, ua cov txheej ntsa thiab huv si thaum ziab. Qhov tawg tsis kam tsuas yog txhim kho cov tsos zoo ntawm cov khoom, tab sis kuj txuas nws lub neej pabcuam.
6. Txhim kho corrosion tsis kam thiab tshuaj lom neeg
Cellulose ethers kuj tseem tuaj yeem txhim kho cov tshuaj thiab cov tshuaj tiv thaiv cov khoom hauv qee cov ntawv thov. Los ntawm kev ua cov ntaub ntawv denser thiab ntau cov dej-resistant, cov neeg muaj kev hais ua cellulose tuaj yeem txo cov tshuaj tsis zoo lossis noo noo ntawm cov khoom. Qhov no yog qhov tseem ceeb hauv qee cov chaw tshwj xeeb, xws li cov nroj tsuag tshuaj tshwj xeeb, cov tub rog ib puag ncig lossis ib puag ncig cov av noo.
Daim ntawv thov cov neeg muaj kev pab cuam ntawm cov waterproud txheej tsis tsuas yog txhim kho cov tshuaj lom neeg xws li acids, yog kuj ua kom cov nqi kho mob lub neej thiab hloov tus nqi kho thiab hloov.
7. Kev tiv thaiv ntsuab ib puag ncig thiab kev txhim kho kom ruaj khov
Cellulose ether yog qhov tseem ceeb ntsuab thiab ib puag ncig cov khoom siv vim nws tau muab los ntawm kev cog ntoo ntuj thiab biodegradable. Piv nrog cov ntaub ntawv siv hluav taws xob, cov neeg muaj kev hais ua cell muaj kev cuam tshuam tsawg rau ib puag ncig thiab tsis txhob tso cov khoom ua phem thaum lub sijhawm tsim khoom. Yog li ntawd, qhov kev siv dav dav ntawm cov neeg ua haujlwm cellulos ua tau raws li cov kev tiv thaiv kev tiv thaiv kev tiv thaiv ib puag ncig thiab kev txhim kho kom loj hlob hauv kev tsim kho kev tsim kho.
Qhov zoo ntawm cov neeg muaj kev pab cuam cellulose hauv cov nqe lus ntawm kev ua tsis tau thiab kev ua tau zoo yog xav hauv lawv cov dej kom zoo, thickening, adhesion thiab huab cua tsis kam. Nws tsis yog txhim kho kev tsim kho cov ntaub ntawv tsim kho hauv tsev, tab sis kuj txhim kho cov khoom tawg, detability thiab corrosion tsis kam, thiab ncua kev pabcuam lub neej ntawm cov khoom siv. Tsis tas li ntawd, ntsuab thiab cov kev ua phooj ywg ib puag ncig ntawm cellulose ether kuj tseem ua rau nws tseem ceeb ntawm kev txhim kho lub tsev tom ntej.
Lub Sijhawm Post: Sep-18-2024