Hydroxypropyl methyl cellulose HPMC yog ib qho uas tsis yog-ionic cellulose ether ua los ntawm cov khoom siv ntuj polymer cellulose los ntawm kev ua tshuaj lom neeg. Lawv yog cov tsis muaj ntxhiab, tsis qab thiab tsis muaj tshuaj lom cov hmoov dawb uas swells rau hauv cov kua ntshiab lossis me ntsis turbid colloidal hauv dej txias. Nws muaj cov yam ntxwv ntawm thickening, bonding, dispersion, emulsification, zaj duab xis tsim, ncua kev kawm ntawv, adsorption, gelation, deg kev ua si, noo noo retention thiab tiv thaiv colloid. Hydroxypropyl methylcellulose tuaj yeem siv rau hauv cov khoom siv hauv tsev, txheej kev lag luam, hluavtaws cob, kev lag luam ceramic, tshuaj, khoom noj khoom haus, textile, kev ua liaj ua teb, kev lag luam tshuaj niaj hnub thiab lwm yam lag luam.
Kev tuav dej ua haujlwm thiab lub hauv paus ntsiab lus: cellulose ether HPMC feem ntau ua lub luag haujlwm ntawm cov dej tuav thiab thickening hauv cement mortar thiab gypsum-based slurry, uas tuaj yeem txhim kho lub zog sib txuas thiab sag tsis kam ntawm slurry. Cov yam ntxwv xws li huab cua kub, kub thiab cua siab ceev yuav cuam tshuam rau volatilization tus nqi ntawm cov dej hauv cement mortar thiab gypsum-based khoom. Yog li ntawd, nyob rau lub caij sib txawv, muaj qee qhov sib txawv ntawm cov dej tuav cov nyhuv tib yam ntawm cov khoom HPMC. Hauv kev tsim kho tshwj xeeb, cov dej tuav cov nyhuv ntawm cov slurry tuaj yeem hloov kho los ntawm kev nce lossis txo tus nqi ntawm HPMC ntxiv.
Kev tuav dej ntawm methyl cellulose ether nyob rau hauv qhov kub thiab txias yog ib qho tseem ceeb qhia kom paub qhov zoo ntawm methyl cellulose ether. HPMC series cov khoom lag luam zoo tuaj yeem daws qhov teeb meem ntawm cov dej tuav ntawm qhov kub thiab txias. Nyob rau hauv lub caij kub kub, tshwj xeeb tshaj yog nyob rau hauv kub thiab qhuav thiab nyias-txheej tsim nyob rau hauv tshav ntuj sab, high-zoo HPMC yuav tsum tau los txhim kho cov dej tuav ntawm slurry.
High-quality HPMC muaj zoo heev uniformity. Nws cov methoxy thiab hydroxypropoxy pawg yog sib npaug ntawm cov saw cellulose molecular, uas tuaj yeem txhim kho lub peev xwm ntawm oxygen atoms ntawm hydroxyl thiab ether bonds los koom nrog dej los tsim hydrogen bonds. , Yog li ntawd cov dej dawb ua cov dej khi, yog li tswj tau cov evaporation ntawm cov dej los ntawm huab cua kub, thiab ua tiav cov dej tuav tau zoo.
High-zoo cellulose HPMC tuaj yeem ua tau zoo sib xws thiab muaj txiaj ntsig zoo hauv cov cement mortar thiab gypsum-based khoom, thiab qhwv tag nrho cov khoom siv, thiab tsim ib txheej ntawm wetting zaj duab xis. Cov dej hauv lub hauv paus yog maj mam tso tawm rau lub sijhawm ntev. Cov khoom siv condensed undergoes hydration cov tshuaj tiv thaiv, thiaj li ua kom lub zog sib txuas thiab compressive zog ntawm cov khoom. Yog li ntawd, nyob rau hauv lub caij ntuj sov kev tsim kho, nyob rau hauv thiaj li yuav ua tiav cov nyhuv ntawm dej tuav, high-quality HPMC cov khoom yuav tsum tau ntxiv nyob rau hauv kom muaj nuj nqis raws li cov mis nyuj, txwv tsis pub, tsis txaus hydration, txo lub zog, tawg, hollowing thiab ntog tawm. yuav tshwm sim vim qhuav qhuav heev. Teeb meem, tab sis kuj ua rau muaj kev nyuaj ntawm cov neeg ua haujlwm tsim kho. Raws li qhov kub thiab txias, qhov HPMC ntxiv tuaj yeem txo qis, thiab tib cov dej tuav tau tuaj yeem ua tiav.
Kev tuav dej ntawm HPMC raug cuam tshuam los ntawm cov hauv qab no:
1. Homogeneity ntawm cellulose ether HPMC
Nyob rau hauv homogeneously reacted HPMC, pawg methoxy thiab hydroxypropoxy yog sib npaug, thiab cov dej tuav tus nqi siab.
2. Thermal gel kub ntawm cellulose ether HPMC
Thermal gel kub yog siab, cov dej tuav tus nqi siab; ntawm qhov tsis sib xws, cov dej tuav tau tsawg.
3. Viscosity ntawm cellulose ether HPMC
Thaum lub viscosity ntawm HPMC nce, cov dej tuav tus nqi kuj nce; Thaum cov viscosity nce mus txog ib theem, qhov nce ntawm cov dej tuav tus nqi yuav tsum tiaj tus.
4. Ntxiv cellulose ether HPMC
Qhov ntau dua ntawm cellulose ether HPMC ntxiv, qhov siab dua cov dej tuav thiab cov dej tuav tau zoo dua. Nyob rau hauv qhov ntau ntawm 0.25-0.6% ntxiv, cov dej tuav tus nqi nce sai nrog qhov nce ntawm qhov sib ntxiv; thaum cov nyiaj ntxiv ntxiv, qhov sib ntxiv ntawm cov dej khaws cia tau qeeb.
Post lub sij hawm: Dec-16-2021