Dispersing hydroxyethyl cellulose (HEC) yog cov txheej txheem tseem ceeb hauv kev lag luam, suav nrog kev lag luam, suav nrog cov tshuaj, tshuaj pleev ib ce, thiab khoom siv tshuaj pleev. HEC yog tsis-ionic, dej-soluble polymer muab tau los ntawm cellulose, siv dav ua lub thickening, ruaj khov, thiab zaj yeeb yaj kiab-sib zog. Kev faib tawm kom raug ntawm HEC yog qhov tseem ceeb kom ntseeg tau nws cov haujlwm hauv cov khoom kawg.
Taw qhia rau hydroxyethyl cellulose (HEC)
Hydroxyethyl cellulose (HEC) yog cov polymer ntau yam los ntawm cellulose los ntawm kev hloov kho tshuaj lom neeg. Nws yog ib qho siv nyob rau hauv kev lag luam xws li:
Kws Tshuaj: HEC yog siv los ua hluav taws xob viscosity thiab stabilizer hauv ntau yam qauv, suav nrog cov tshuaj thiab ncauj.
Cov tshuaj pleev ib ce: HEC tau ua haujlwm hauv cream, tshuaj ntau, tshuaj zawv plaub hau, thiab lwm yam khoom siv saib xyuas tus kheej ua tus neeg saib xyuas koj tus kheej thiab emulsifier.
Khoom noj: nws siv nyob rau hauv cov khoom lag luam khoom noj raws li cov tuab tuab, stabilizer, thiab tus neeg sawv cev.
Kev tsim kho: Hec yog siv hauv cov khoom siv tsim kho xws li cov xim av, cov nplaum, thiab cov khoom noj kom xis nyob kom txhim kho lawv cov khoom siv hluav taws xob.
Qhov tseem ceeb ntawm Dispersing Hec
Kev tsim nyog dispersion ntawm HEC yog qhov tseem ceeb heev kom ua tiav cov khoom uas xav tau hauv cov khoom kawg. Ua tau zoo dispersion ua kom tiav:
Kev sib txuam: Homogeneous faib ntawm HEC thoob plaws ntawm cov kev daws teeb meem lossis kev sib piv.
Ua haujlwm: HEC tuaj yeem ua tiav nws lub luag haujlwm ua tiav, xws li thickening, ruaj khov, lossis tsim cov yeeb yaj kiab.
Kev Ua Tau Zoo: Txhim Kho Kev Ua Yeeb Yam, suav nrog kev tswj hwm, ruaj khov, thiab kev ntxhib los mos.
Kev khwv nyiaj txiag: Ntau tshaj plaws ntawm kev ua tau zoo ntawm HEC, NYEEM KHIB, thiab txo cov nqi ntau lawm, thiab txo cov nqi ntau lawm.
Cov hau kev rau dispersing hec
1. Cov thev naus laus zog:
Stirring lossis sib xyaw: siv cov neeg kho mob stirrers, mixers, los yog homogenizers rau disperse hac rau hauv cov kuab tshuaj lossis matrix maj. Kho cov kev txom nyem ceev thiab ntev raws li qhov kev xav tau ntawm HEC kom siab thiab viscosity xav tau.
High-speed stirring: ua haujlwm siab-ceev cov pa roj lossis homogenizers rau kev faib tawm sai sai, tshwj xeeb rau cov kev daws teeb meem ntau dua lossis cov kev daws teeb meem.
2. Cov txheej txheem hydration:
Pre-hydration: Ua ntej-yaj tawm HEC hauv ib feem ntawm cov huab cua sov ua ntej ntxiv rau cov pob loj. Qhov no ua raws li kev cuam tshuam yooj yim dua thiab tiv thaiv clumping.
MLASS ntxiv ntxiv: ntxiv hec maj mam mus rau cov kuab tshuaj nrog tas mus li stirring kom ntseeg tau tias muaj hydration hydration thiab dispersion.
3. Tswj kub:
Cov txheej txheem ntawm qhov kub tshaj: Kev tswj cov txheej txheem kev rho tawm ntawm qhov ntsuas kub zoo tshaj plaws los txhim kho solubility thiab dispersion kinetics ntawm HEC. Feem ntau, chav sov kom nce me ntsis kom kub yog tsim rau hec dispersion.
Dej sov da dej: Siv lub nkoj dej sov lossis lub nkoj ntub kom tswj tau qhov kub thiab txias, tshwj xeeb rau cov ntawv thov tau kub dua.
4. PHOOJ YWG:
Qhov Zoo Tshaj Pha: Kho cov Ph ntawm cov kuab tshuaj lossis dispersion nruab nrab rau qhov zoo tshaj plaws rau HEC solubility thiab dispersion. Feem ntau, nruab nrab mus rau me nyuam alkaline pH yog qhov zoo rau HEC Dispersion.
5. Txav-thinning cov tswv yim:
Shear tus nqi hloov kho: ua haujlwm shear-thinning cov tswv yim los ntawm kho cov kab mob shear thaum lub sijhawm dispersion. Cov nqi sib zog ntau dua tuaj yeem pab tau HEC muaj zog thiab txhawb kev sib cais.
Siv cov khoom rheological: siv cov khoom siv rheological los saib xyuas thiab tswj cov nqi shear thaum tawg, ua kom muaj kev sib tawg ua ke.
6. Se semborant pab dispersion:
Surfactant xaiv: Xaiv qhov tsim nyog surfactants lossis dispersing cov neeg sawv cev tau tshaj tawm nrog HEC thiab qhov nruab nrab dispersion. Surfactants tuaj yeem txo cov nro kom nruj, txhim kho kev ntub dej, thiab pabcuam hauv hec dispersion.
Surfactant concentration: Txhim kho cov surfactration surfactration ntawm kev pab txhawb kom pab nws cov khoom lossis kev ua tau zoo hauv cov khoom kawg.
7. Ultrasonication:
Ultrasonic dispersion: siv tshuab hluav taws xob ultrasonic rau cov dispersion siv ultrasonic probes lossis da dej. Ultrasonication txhawb nqa qhov me me me me txo, deagglomeration, thiab cov ris tsho sib tawg ntawm hec hais hauv cov kuab tshuaj lossis matrix.
8. Cov txheej txheem txo qis loj me me:
Milling los yog sib tsoo: siv Milling lossis sib tsoo cov khoom siv los txo cov particle loj thiab txhim kho qhov homogeneity ntawm cov dispersion.
Kev txheeb xyuas me me me: saib xyuas thiab tswj cov particle loj faib ntawm dispersed HEC siv cov qauv siv lizuraction lossis dynamic lub teeb tawg.
9. Tswjhwm ntsuas:
Viscosity ntsuas: Nquag saib lub viscosity ntawm kev faib tawm hec thaum lub sij hawm dispersion ua kom muaj kev sib xws thiab ua tiav cov khoom siv rheological.
Kev txheeb xyuas me me: Ua cov tshuaj ntsuam me me kom ntsuas qhov ua tau zoo ntawm kev tawg thiab ua kom muaj kev faib tawm ntawm hec hais.
Dispersing hydroxyethyl cellulose (HEC) yog qhov tseem ceeb yog qhov tseem ceeb rau kev ua tiav cov khoom lag luam thiab kev ua tau zoo hauv ntau daim ntawv thov. Kev ua hauj lwm rau kev tshem tawm kom tsim nyog, suav nrog kev sib cais hydration, tuaj yeem tsim kho kom haum, tuaj yeem tsim kev pab kub, tuaj yeem tsim nyog cov kev ua haujlwm ntawm HEC hauv cov khoom lag luam xaus. Ib qho ntxiv, kev siv cov kev tswj kom zoo xws li ntsuas ntsuas thiab ntsuas qhov loj me me pab kom muaj kev sib haum xeeb thiab ua kom zoo dua cov txheej txheem kev ua kom tsis sib xws. Los ntawm cov lus qhia no, cov chaw tsim khoom tuaj yeem txhim kho cov kev ua tau zoo thiab qhov zoo ntawm kev lag luam hec raws thoob plaws hauv kev lag luam sib txawv.
Lub Sijhawm Post: Apr-09-2024