Methyl Hydroxyethyl Cellulose (MHEC)yog ib qho cellulose ether uas muaj molecular hnyav siv dav hauv cov ntaub ntawv tsim kho, muaj cov khoom zoo heev uas ua rau tuab, khaws dej, ruaj khov, thiab ua haujlwm tau zoo. Ua ib qho tseem ceeb ntawm cov organic polymeric additive, MHEC tau dhau los ua ib qho tseem ceeb hauv cov mortars qhuav niaj hnub no, hmoov putty, cov nplaum pobzeb, cov txheej txheem, thiab cov tshuab rwb thaiv tsev, thiab nws lub luag haujlwm thiab kev cia siab hauv kev lag luam kev tsim kho tau dhau los ua qhov tseem ceeb.
1. Qhov Tseem Ceeb ntawm MHEC hauv Kev Lag Luam Tsim Kho
1.1. Txhim Kho Kev Ua Haujlwm ntawm Cov Pob Zeb
MHEC tuaj yeem txhim kho qhov sib xws thiab kev ua haujlwm ntawm cov mortars qhuav. Nws cov nyhuv ua rau cov mortar tuab ua rau cov mortar tswj tau qhov dej zoo thiab thixotropy thaum lub sijhawm tsim kho, tiv thaiv kev plam thiab ua kom cov khoom sib kis sib npaug ntawm phab ntsa lossis hauv pem teb. Tsis tas li ntawd, MHEC lub zog sib txuas ua rau cov mortar thiab cov substrate lo rau, txhim kho qhov zoo ntawm kev tsim kho thiab kev ruaj khov.
1.2. Kev Khaws Dej Zoo Dua thiab Cov Khoom Tiv Thaiv Kev Qaug Zog
Cov tshuaj nplaum ua vaj tse feem ntau yuav tawg lossis tsis sib txuas zoo vim yog dej ua pa sai sai thaum lub sijhawm tsim kho. Cov qauv molecular MHEC muaj cov pab pawg hydrophilic, uas ua rau cov dej noo noo thiab qeeb qeeb poob dej, yog li ua kom cov tshuaj nplaum khaws dej tau zoo dua thiab ua kom cov cement noo txaus. Tib lub sijhawm, nws cov khoom zoo tiv thaiv kev poob qis tiv thaiv cov tshuaj nplaum poob qis thaum lub sijhawm tsim kho ntsug, txhim kho kev ua haujlwm ntawm kev tsim kho.
1.3. Kev Ruaj Ntseg Khoom Siv Zoo Dua thiab Kev Hloov Kho Tau Zoo Dua
MHEC tuaj yeem tswj cov khoom rheological ntawm cov ntaub ntawv, tso cai rau mortar, putty, lossis coatings kom tswj tau kev ua haujlwm ruaj khov hauv qab huab cua sib txawv. Tshwj xeeb tshaj yog nyob rau hauv qhov kub siab lossis qhuav, MHEC tswj tau qhov khaws cia dej zoo, tiv thaiv tau zoo rau kev tawg thiab teeb meem hollowing, qhia tau tias muaj zog hloov pauv tau.
1.4. Kev Txhim Kho Qhov Txheej Txheem Sib Xws thiab Cov Khoom Siv Ua Zaj Duab Xis
Hauv cov txheej txheem vaj tse uas muaj dej, MHEC tsis yog tsuas yog ua haujlwm ua cov khoom ua kom tuab thiab ruaj khov xwb tab sis kuj txhim kho kev sib kis ntawm cov xim, ua rau cov xim pleev xim sib xws thiab puv dua. Nws cov yam ntxwv zoo heev uas tsim cov zaj duab xis thiab cov yam ntxwv tiv thaiv kev tawg pab txhim kho qhov zoo nkauj thiab kev ruaj khov ntawm cov txheej txheem, ua tau raws li ob qho kev xav tau ntawm kev zoo nkauj thiab kev tiv thaiv ib puag ncig hauv kev tsim kho vaj tse niaj hnub.
2. Cov txiaj ntsig ntawm MHEC
2.1. Kev yaj zoo heev thiab kev sib haum xeeb
MHEC yaj sai sai hauv dej txias, ua rau nws ua tau ib qho kua pob tshab thiab muaj viscosity siab. Nws muaj kev sib haum xeeb zoo heev nrog ntau yam khoom siv inorganic cementitious, polymer hmoov, thiab pigment systems, muab kev siv tau yooj yim thiab hloov pauv tau rau ntau yam qauv tsim kho.
2.2. Cov Khoom Siv Tshuaj Ruaj Khov
MHEC muaj zog tiv taus cov kua qaub, alkalis, thiab ntsev, thiab tsis yooj yim lwj lossis lwj, tswj kev ua haujlwm ruaj khov hauv cov chaw muaj tshuaj lom neeg nyuaj. Cov yam ntxwv no ua rau nws muaj zog zoo heev hauv cov tshuab ua los ntawm cement, gypsum, lossis lime.
2.3. Kev Nyab Xeeb Ib puag ncig Siab
MHEC yog cov cellulose ether uas tsis yog ionic uas tau los ntawm cov cellulose ntuj. Cov txheej txheem tsim khoom tsis muaj cov khoom phom sij, thiab nws muaj kev puas tsuaj zoo rau lub cev, ua tau raws li qhov yuav tsum tau ua ntawm ib puag ncig ntawm kev tsim vaj tsev ntsuab thiab kev txhim kho kom ruaj khov.
3. Cov Cheeb Tsam Siv Tau ntawm MHEC
Cov nplaum thiab cov grout rau pobzeb: Txhim kho kev nplaum thiab tiv thaiv kev plam, ua kom tiav du;
Cov tshuaj nplaum plastering thiab cov tshuaj nplaum thermal insulation: Txhim kho kev tuav dej thiab kev tiv thaiv kev tawg, txhim kho qhov du ntawm qhov chaw;
Hmoov Putty: Txhim kho qhov kev siv du, tiv thaiv kev tawg, thiab ua kom qhov chaw ntom ntom ntxiv;
Cov tshuaj khib uas nws tus kheej leveled: Kho qhov flowability thiab kev sib xws, ua rau hauv pem teb du dua;
Cov xim pleev xim latex thiab cov tshuaj pleev xim dej: Txhim kho qhov tuab, kev tawg, thiab cov khoom rheological, txhim kho qhov kev xav ntawm daim ntawv thov.
4. Kev Txhim Kho ntawm MHEC
4.1. Kev Ua Haujlwm Zoo
Qhov kev thov kom ua haujlwm tau zoo thiab ruaj khov ntawm cov ntaub ntawv siv hauv kev tsim kho ua rau MHEC tsim cov nqi hloov pauv siab dua, kev ntshiab dua, cov tshauv tsawg dua, thiab kev tswj cov viscosity kom meej. MHEC ua tau zoo yuav muaj feem ntau dua hauv cov ntawv thov siab xws li cov mortars uas ua tau raws li tus kheej thiab cov mortars uas yoog tau.
4.2. Kev Tiv Thaiv Ib puag ncig thiab Kev Txhim Kho Kom Ruaj Khov
Hauv cov ntsiab lus ntawm "ob chav carbon" (carbon dioxide, carbon emissions, thiab carbon sequestration), cov ntaub ntawv tsim kho hais txog kev siv hluav taws xob tsawg thiab biodegradability. MHEC, ib qho khoom siv zoo rau ib puag ncig uas tau los ntawm cov cellulose ntuj, tau npaj los ua cov khoom siv nyiam rau kev hloov qee cov polymers hluavtaws, pab txhawb rau kev tsim cov txheej txheem tsev ntsuab.
4.3. Kev Kho Kom Haum thiab Kev Ua Haujlwm Ntau Yam
Yav tom ntej, MHEC yuav dhau los ua qhov kev txhim kho cov qauv molecular rau ntau yam kev siv sib txawv kom ua tiav cov khoom tshwj xeeb xws li cov khoom yaj sai, tiv taus khov-thaw, lossis cov khoom khaws cia dej siab, ua tau raws li qhov xav tau ntawm ntau yam huab cua, cov txheej txheem tsim kho, thiab cov khoom siv.
4.4. Kev Ua Haujlwm Thoob Ntiaj Teb thiab Kev Tsim Khoom Hauv Tebchaws Ua Ke
Nrog kev txhim kho ntawm cov qauv kev tsim kho hauv tebchaws thiab thoob ntiaj teb, kev lag luam MHEC hauv Suav teb tab tom txhim kho sai. Cov hom lag luam hauv tebchaws maj mam mus txog qib thoob ntiaj teb hauv qhov zoo thiab kev ruaj khov, thiab yuav muaj kev sib tw zoo dua hauv kev lag luam khoom siv hauv ntiaj teb yav tom ntej.
MHEC, nrog nws cov khoom zoo heev ntawm lub cev thiab tshuaj lom neeg thiab cov yam ntxwv zoo rau ib puag ncig, tab tom dhau los ua ib qho khoom siv tsis muaj txiaj ntsig hauv kev lag luam kev tsim kho. Nrog rau kev txhawb nqa tas mus li ntawm cov tswv yim kev tsim kho ntsuab thiab cov txheej txheem tsim kho tshiab, qhov kev siv ntawm MHEC yuav nthuav dav ntxiv, thiab nws lub luag haujlwm hauv kev txhim kho kev ua tau zoo ntawm cov ntaub ntawv tsim kho thiab txhawb kev txhim kho ntawm kev lag luam kev tsim kho yuav tseem ceeb zuj zus, nrog rau kev cia siab dav dav yav tom ntej.
Lub sijhawm tshaj tawm: Kaum Ib Hlis-01-2025