HPMC, lub npe tag nrho yog Hydroxypropyl Methylcellulose, yog non-ionic cellulose ether dav siv hauv kev tsim kho, tshuaj, khoom noj, tshuaj txhua hnub thiab lwm yam haujlwm.
1. Kev faib tawm los ntawm viscosity
Lub viscosity ntawm HPMC yog ib qho ntawm nws cov khoom tseem ceeb ntawm lub cev, thiab HPMC nrog cov viscosity sib txawv muaj qhov sib txawv tseem ceeb hauv daim ntawv thov. Cov viscosity ntau yog los ntawm qis viscosity (tsawg ntawm cps) mus rau siab viscosity (ntau txhiab cps).
Tsawg viscosity HPMC: Feem ntau yog siv rau hauv daim ntawv thov uas yuav tsum tau tawg sai sai los yog flowability, xws li kua tshuaj ncua kev kawm ntawv, tshuaj tsuag, thiab lwm yam.
Nruab nrab viscosity HPMC: dav siv nyob rau hauv cov tshuaj niaj hnub, xws li tshuaj zawv plaub hau, da dej gel, thiab lwm yam, muab cov nyhuv tuab tuab thiab zoo rheological zog.
High viscosity HPMC: feem ntau yog siv rau hauv cov ntaub ntawv siv, xws li mortar qhuav, ceramic pobzeb nplaum, sab hauv thiab sab nrauv phab ntsa putty, thiab lwm yam.
2. Kev faib tawm los ntawm kev hloov pauv
Qib ntawm kev hloov ntawm HPMC yog hais txog tus naj npawb ntawm hydroxypropyl thiab methyl substituents nyob rau hauv nws cov molecule, feem ntau qhia raws li MS (hydroxypropyl degree ntawm kev hloov) thiab DS (methyl hloov).
Qib qis ntawm kev hloov pauv HPMC: yaj sai sai thiab feem ntau yog siv rau hauv cov ntawv thov uas yuav tsum tau tawg sai sai, xws li cov tshuaj ntsiav tshuaj txheej thiab cov dej haus tam sim.
High degree ntawm kev hloov HPMC: Nws muaj viscosity ntau dua thiab zoo dua dej tuav, thiab yog tsim rau cov khoom uas yuav tsum tau muaj viscosity siab thiab siab dej tuav, xws li cov ntaub ntawv hauv tsev thiab cov tshuaj pleev ib ce zoo moisturizing.
3. Kev faib tawm los ntawm thaj chaw thov
Cov kev siv tshwj xeeb ntawm HPMC hauv ntau qhov chaw sib txawv heev, thiab tuaj yeem muab faib ua pawg hauv qab no raws li daim ntawv thov teb:
khoom siv tsev
Lub luag haujlwm tseem ceeb ntawm HPMC hauv kev tsim kho yog txhawm rau txhim kho kev tsim kho thiab ua haujlwm ntev ntawm cov ntaub ntawv, suav nrog:
Qhuav mortar: HPMC muab cov dej tuav zoo, lubricity thiab kev ua haujlwm, txhim kho kev tsim kho thiab ua tiav cov khoom zoo.
Pobzeb nplaum: Ua kom muaj zog sib txuas thiab cov khoom tiv thaiv kom ntseeg tau qhov ruaj khov thiab ua haujlwm ntev ntawm cov pobzeb paving.
Xim thiab putty: Txhim kho rheology thiab dej tuav cov xim thiab putty kom tsis txhob tawg thiab hmoov poob.
tshuaj kho mob
Hauv thaj chaw kws tshuaj, HPMC feem ntau yog siv los ua cov tshuaj ntxiv, suav nrog:
Cov ntsiav tshuaj txheej: Raws li cov ntsiav tshuaj txheej cov khoom siv, nws muab cov dej noo-pov thawj, solubilization thiab tso tawm ua haujlwm los txhim kho kev ruaj ntseg thiab zoo li cov tshuaj.
Gel: siv los npaj cov tshuaj gels, muab cov adhesion zoo thiab biocompatibility.
zaub mov
HPMC feem ntau yog siv los ua thickener, emulsifier thiab stabilizer hauv kev lag luam zaub mov, suav nrog:
Noodle khoom: Ua kom lub zog thiab elasticity ntawm mov paj, txhim kho saj thiab kev ntxhib los mos.
Cov khoom siv mis nyuj: Raws li emulsifier thiab stabilizer, nws tiv thaiv stratification thiab nag lossis daus ntawm cov khoom siv mis nyuj thiab txhim kho cov khoom ruaj khov.
Cov tshuaj txhua hnub
Hauv cov tshuaj txhua hnub, HPMC tau siv dav los ua cov thickeners thiab stabilizers, suav nrog:
Tshuaj zawv plaub hau thiab da dej gel: Muab cov viscosity nruab nrab thiab rheology los txhim kho kev siv khoom.
Cov khoom tu tawv nqaij: Raws li cov thickener thiab moisturizer, nws txhim khu cov nyhuv moisturizing thiab kev siv ntawm cov khoom.
4. Lwm lub hom phiaj tshwj xeeb
HPMC kuj tseem tuaj yeem siv rau qee qhov tshwj xeeb, xws li roj av mining, ceramic kev lag luam, ntawv kev lag luam, thiab lwm yam.
Oilfield ntau lawm: siv nyob rau hauv drilling kua thiab fracturing kua los muab zoo heev thickening thiab kua poob txo zog.
Ceramic kev lag luam: siv los ua cov ntawv khi thiab tshem tawm cov neeg sawv cev los txhim kho kev ruaj ntseg thiab fluidity ntawm ceramic slurry.
Papermaking kev lag luam: siv rau saum npoo ntawm daim ntawv kom nws lub zog thiab dej tsis kam.
Raws li kev siv ntau yam cellulose derivative, HPMC muaj cov khoom zoo ntawm lub cev thiab tshuaj lom neeg thiab cov ntawv thov dav dav. Ntau hom HPMC muaj lawv tus kheej cov yam ntxwv ntawm viscosity, qib kev hloov pauv thiab siv. Xaiv hom HPMC tsim nyog raws li cov ntawv thov tshwj xeeb tuaj yeem txhim kho cov khoom ua tau zoo thiab zoo. Nrog rau kev nce qib ntawm kev tshawb fawb thiab thev naus laus zis thiab kev nthuav dav ntawm daim ntawv thov, daim ntawv thov ntawm HPMC yuav dhau los ua qhov dav thiab qhov tob.
Post lub sij hawm: Lub Xya hli ntuj-31-2024