Hydroxyethyl Methyl Cellulose (HEMC)yog ib qho tseem ceeb cellulose ether compound thiab yog cov non-ionic cellulose ether. HEMC tau txais los ntawm kev hloov kho tshuaj nrog cellulose ntuj ua cov khoom siv raw. Nws cov qauv muaj hydroxyethyl thiab methyl substituents, yog li nws muaj cov khoom siv lub cev thiab tshuaj lom neeg tshwj xeeb thiab siv dav hauv cov ntaub ntawv tsim kho, txheej, tshuaj txhua hnub, tshuaj thiab lwm yam teb.
1. Cov khoom siv lub cev thiab tshuaj lom neeg
HEMC feem ntau yog hmoov dawb los yog dawb tawm los yog granules, uas yooj yim yaj hauv dej txias los ua cov kua colloidal pob tshab los yog me ntsis turbid. Nws cov yam ntxwv tseem ceeb suav nrog:
Kev yaj: HEMC tuaj yeem yaj sai hauv dej txias, tab sis nws yaj tsis tau zoo hauv dej kub. Nws qhov yaj thiab viscosity hloov pauv nrog kev hloov pauv ntawm qhov kub thiab pH.
Cov nyhuv ua kom tuab: HEMC muaj peev xwm ua kom tuab hauv dej thiab tuaj yeem ua rau kom cov viscosity ntawm cov tshuaj zoo dua.
Kev khaws dej: Nws muaj kev ua tau zoo heev ntawm kev khaws dej thiab tuaj yeem tiv thaiv kev poob dej hauv cov khoom siv.
Cov khoom tsim zaj duab xis: HEMC tuaj yeem tsim cov zaj duab xis pob tshab sib xws ntawm qhov chaw nrog qee qhov tawv thiab lub zog.
Lubricity: Vim nws cov qauv molecular tshwj xeeb, HEMC tuaj yeem muab cov roj nplua nyeem zoo heev.
2. Cov txheej txheem tsim khoom
Cov txheej txheem tsim khoom ntawm HEMC feem ntau suav nrog cov kauj ruam hauv qab no:
Alkalization: Cov cellulose ntuj raug kho nyob rau hauv alkaline mob los tsim alkali cellulose.
Cov tshuaj tiv thaiv etherification: Los ntawm kev ntxiv cov neeg sawv cev methylating (xws li methyl chloride) thiab cov neeg sawv cev hydroxyethylating (xws li ethylene oxide), cellulose dhau los ua cov tshuaj tiv thaiv etherification ntawm qhov kub thiab txias tshwj xeeb.
Kev kho tom qab: Cov khoom nyoos uas tau los ntawm kev ua kom tsis muaj zog, ntxuav, ziab, thiab tsoo kom thaum kawg tau txaisHEMCcov khoom.
3. Cov chaw thov tseem ceeb
(1) Cov ntaub ntawv siv hauv kev tsim kho HEMC yog siv dav hauv kev tsim kho, feem ntau yog siv rau hauv cov cement mortar, putty hmoov, vuas nplaum, gypsum thiab lwm yam khoom. Nws tuaj yeem txhim kho qhov viscosity, dej khaws cia thiab tiv thaiv kev sagging ntawm cov ntaub ntawv tsim kho, ua kom lub sijhawm qhib ntev dua, thiab yog li txhim kho kev ua haujlwm ntawm kev tsim kho.
(2) Cov xim thiab cov kua mem Hauv cov xim, HEMC ua haujlwm ua cov khoom ua kom tuab thiab cov khoom ua kom ruaj khov los txhim kho qhov viscosity thiab rheology ntawm cov xim thiab tiv thaiv cov txheej kom tsis txhob sagging. Tsis tas li ntawd, nws tuaj yeem muab cov khoom zoo rau kev tsim cov zaj duab xis, ua rau cov xim pleev xim zoo nkauj dua thiab du.
(3) Tshuaj thiab tshuaj pleev ib ce HEMC tuaj yeem siv ua cov nplaum thiab cov yeeb yaj kiab tsim cov tshuaj ntsiav, nrog rau cov khoom ua kom tuab thiab moisturizer hauv cov khoom saib xyuas tawv nqaij. Vim nws muaj kev nyab xeeb siab thiab biocompatibility, nws feem ntau siv rau hauv cov khoom xws li tshuaj qhov muag, tshuaj ntxuav ntsej muag, thiab tshuaj pleev.
(4) Cov tshuaj siv txhua hnub Hauv cov tshuaj siv txhua hnub xws li cov tshuaj ntxuav tes thiab cov tshuaj txhuam hniav, HEMC yog siv los ua cov khoom tuab thiab stabilizer los txhim kho rheology thiab kev ruaj khov ntawm cov khoom.
4. Cov txiaj ntsig thiab kev tiv thaiv ib puag ncig
HEMC muaj cov yam ntxwv ntawm kev puas tsuaj rau ib puag ncig thiab kev tiv thaiv ib puag ncig thiab yuav tsis ua rau muaj kuab paug rau ib puag ncig mus sij hawm ntev. Tib lub sijhawm, nws tsis muaj tshuaj lom thiab tsis ua rau khaus rau tib neeg daim tawv nqaij thiab cov ntaub so ntswg, thiab ua tau raws li qhov yuav tsum tau ua ntawm kev tiv thaiv ib puag ncig ntsuab thiab kev txhim kho kom ruaj khov.
5. Kev cia siab ua lag luam thiab kev loj hlob ntawm cov qauv kev lag luam
Nrog rau kev txhim kho ntawm kev lag luam kev tsim kho thiab kev lag luam tshuaj lom neeg txhua hnub, qhov kev thov ua lag luam rau HEMC txuas ntxiv mus. Yav tom ntej, thaum tib neeg them sai sai rau cov ntaub ntawv zoo rau ib puag ncig thiab txhim kho kev ua haujlwm ntawm cov khoom, HEMC yuav siv dav dua hauv ntau qhov chaw. Tsis tas li ntawd, kev tshawb fawb thiab kev tsim cov khoom HEMC tshiab (xws li cov khoom siv tiv taus kub thiab hom tam sim ntawd) kuj tseem yuav txhawb nws daim ntawv thov hauv kev lag luam siab.
Ua ib qho multifunctional thiab high-performance cellulose ether,hydroxyethyl methylcellulose (HEMC)ua lub luag haujlwm tseem ceeb hauv kev tsim kho, kev pleev xim, tshuaj thiab lwm yam teb nrog nws cov khoom siv lub cev thiab tshuaj lom neeg tshwj xeeb. Nrog kev nce qib ntawm kev tshawb fawb thiab thev naus laus zis thiab kev nthuav dav ntawm cov teb thov, HEMC yuav ua lub luag haujlwm tseem ceeb dua hauv kev lag luam niaj hnub no thiab muab kev txhawb nqa zoo rau kev txhim kho ntawm cov lag luam cuam tshuam.
Lub sijhawm tshaj tawm: Kaum Ib Hlis-11-2024