Hydroxypropyl methylcellulose yog sivHPMCyog ib qho uas tsis yog-ionic cellulose ether ua los ntawm tej yam ntuj tso polymer khoom cellulose los ntawm ib tug series ntawm tshuaj ua. Lawv yog cov tsis muaj ntxhiab tsw, tsis qab thiab tsis muaj kuab lom dawb hmoov uas swells hauv dej txias rau cov kua ntshiab lossis me ntsis hazy colloidal. Nws muaj cov yam ntxwv ntawm thickening, khi, dispersing, emulsifying, zaj duab xis-forming, suspending, adsorbing, gelling, nto-active, khaws cia noo noo thiab tiv thaiv colloid. Hydroxypropyl methylcellulose, methylcellulose tuaj yeem siv rau hauv cov khoom siv hauv tsev, txheej kev lag luam, hluavtaws cob, ceramics kev lag luam, tshuaj, khoom noj khoom haus, textile, kev ua liaj ua teb, tshuaj niaj hnub thiab lwm yam lag luam.
Cov dej tuav cov nyhuv thiab lub hauv paus ntsiab lus ntawm hydroxypropyl methylcellulose HPMC
Cellulose ether HPMC feem ntau plays lub luag hauj lwm ntawm dej tuav thiab thickening nyob rau hauv cov cement mortar thiab gypsum-based slurry, uas tuaj yeem txhim kho cov cohesion thiab sag resistance ntawm slurry.
Cov yam ntxwv xws li huab cua kub, kub thiab cua siab yuav cuam tshuam rau cov 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 khoom ntawm cov khoom nrog tib tus nqi ntawm HPMC ntxiv. 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 ntawm 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 hauv 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-zoo HPMC, nrog zoo heev uniformity, nws cov methoxy thiab hydroxypropoxy pawg yog tusyees faib raws li cellulose molecular saw, uas yuav txhim kho lub peev xwm ntawm cov pa atoms ntawm hydroxyl thiab ether bonds mus koom nrog dej los tsim hydrogen bonds, yog li ntawd. Cov dej dawb ua cov dej khi, yog li txhawm rau tswj cov evaporation ntawm cov dej los ntawm huab cua kub thiab ua tiav cov dej khaws cia siab.
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 encapsulates tag nrho cov khoom, thiab tsim cov yeeb yaj kiab ntub dej, thiab cov dej noo hauv lub hauv paus yog maj mam tso tawm rau lub sijhawm ntev. Cov tshuaj tiv thaiv hydration ntawm cov khoom coagulating tshwm sim, yog li ua kom lub zog sib txuas thiab compressive zog ntawm cov khoom. Yog li ntawd, nyob rau lub caij ntuj sov kev tsim kho, kom ua tiav cov nyhuv ntawm cov dej tuav, nws yog ib qho tsim nyog yuav tsum tau ntxiv cov khoom zoo HPMC raws li cov qauv, txwv tsis pub, yuav muaj dej tsis txaus, txo lub zog, tawg, hollowing thiab ntog tawm. tshwm sim los ntawm kev ziab sai heev. Nws kuj ua rau muaj kev nyuaj ntawm kev tsim kho rau cov neeg ua haujlwm. Raws li qhov kub thiab txias, qhov sib ntxiv ntawm HPMC tuaj yeem txo qis, thiab tib cov dej tuav tau tuaj yeem ua tiav.
Kev tuav dej ntawm hydroxypropyl methylcellulose HPMC cov khoom nws tus kheej feem ntau cuam tshuam los ntawm cov hauv qab no:
1. Cellulose ether HPMC homogeneity
Lub hom phiaj sib xws HPMC muaj kev faib tawm tsis sib xws ntawm methoxy thiab hydroxypropoxy pawg thiab tuav dej siab.
2. Cellulose ether HPMC thermal gel kub
Qhov siab dua cov thermal gel, qhov siab dua cov dej tuav tus nqi; txwv tsis pub, qhov qis dua cov dej tuav tus nqi.
3. Cellulose ether HPMC viscosity
Thaum lub viscosity ntawm HPMC nce, cov dej tuav tus nqi kuj nce; Thaum lub viscosity nce mus txog ib theem, qhov nce ntawm cov dej tuav tus nqi yuav maj mam.
4. Cellulose ether HPMC tus nqi ntxiv
Qhov loj dua qhov ntxiv ntawm cellulose ether HPMC, qhov siab dua cov dej tuav thiab cov dej tuav tau zoo dua. Nyob rau hauv qhov ntau ntawm 0.25-0.6%, 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 tuav tau qeeb qeeb.
Post lub sij hawm: Oct-20-2022