Hydroxyethyl cellulose (HEC) yog ib qho tseem ceeb cellule cellule, feem ntau siv hauv kev lag luam pleev xim raws li cov tuab yaj ntaub, muaj stabiology thiab rheology kho tshuab. Nws tuaj yeem txhim kho cov kua dej thiab muaj kev ruaj khov ntawm cov xim thiab txhim kho nws cov khoom ua yeeb yaj kiab.
1. Cov khoom thiab cov haujlwm ntawm hydroxyethyl cellulose
1.1 Cov Khoom Yooj Yim
Hydroxyethyl cellulose yog dej-soluble nonionic polymer ua los ntawm kev qhia cov pab pawg hydroxyethyl rau hauv cellulose. Nws cov yam ntxwv muaj xws li:
Dej solubility: yooj yim soluble hauv dej los ua ib pob tshab rau milky dawb tov.
Viscosity tswj: lub viscosity ntawm kev daws teeb meem tuaj yeem tswj hwm los ntawm kev kho nws txoj kev xav.
pH stability: ruaj khov tshaj qhov dav dav.
Biodegradability: ib puag ncig phooj ywg.
1.2 haujlwm
Hauv cov xim pleev xim, cov haujlwm tseem ceeb ntawm hydroxyethyl cellulose muaj xws li:
Thickening: nce lub viscosity ntawm cov xim, txhim kho nws qhov kev ncua thiab fluidity.
Kev ruaj khov: tiv thaiv cov xim pedimentation thiab txhim kho kev ruaj khov.
Rheology Cov Kev Cai: Txhim kho cov khoom ntawm cov xim ntawm cov xim thiab tswj cov xim thiab ntsuas cov xim ntawm cov xim kev tsim kho.
2. Cov kauj ruam rau ntxiv hydroxyethyl cellulose
2.1 Kev Npaj
Nyob rau hauv txheej txheej, cov kev npaj ua nram qab no yog yuav tsum rau ntxiv hydroxyethyl cellulose:
Cov Khoom Siv Khoom Siv Raw: Xaiv cov hom uas tsim nyog thiab cov lus qhia hydroxyethyl cellulose (xws li cov qib sib txawv ntawm cov qib thiab cov viscosity).
Dissolving nruab nrab: Npaj lub nruab nrab rau dissolving hydroxyethyl cellulose, feem ntau yog dej lossis cov tshuaj aqueous.
2.2 Cov txheej txheem discolvancing
Dispersion: maj mam nphoo lub hydroxyethyl cellulose rau hauv dej nplawm. Txhawm rau kom tsis txhob agglomeration, cellulose tuaj yeem ua tiav nrog qee qhov nyiaj ntawm glycerol lossis lwm yam los tiv thaiv kev sawv cev.
Stirring: Ua kom nplawm los txhawb cov dispersion ntawm cellulose hauv dej. Lub nrawm dua yuav tsum tau nrawm txaus kom tsis txhob tsim cov lumps, tab sis tsis dhau siab kom tsis txhob qhia txog huab cua ntau dhau.
O: tso cai rau lub cellulose mus rau o tuaj rau hauv dej. Feem ntau nws yuav siv sijhawm 30 feeb txog ob peb teev, nyob ntawm seb thiab specification ntawm cellulose.
Cua sov (xaiv tau): Rau qee cov cellulose ntau ntau yam, cov dej tuaj yeem ua kom sov (feem ntau tsis ntau tshaj 50 ° C) kom ua kom nrawm dua cov txheej txheem sib cais.
Dissolving: txuas ntxiv stirring kom txog thaum lub cellulose yog rhuav tshem thiab ib qho kev daws teeb meem ntawm cov khoom siv. Cov tshuaj tiv thaiv yaj yuav tsum muaj pob tshab lossis translucent, tsis muaj qhov pom tseeb los yog undissolved cellulose.
2.3 Ntxiv rau txheej
Kev npaj ua ntej tov: hydroxyethyl cellulose feem ntau yog yaj thiab npaj rau hauv kev daws teeb meem ua ntej, uas yog tom qab ntawd ntxiv rau txheej. Qhov no ua kom pom tseeb tias lub cellulose yog tusyees faib rau hauv txheej.
Cov ntsis me dua: maj mam ntxiv cov hydroxyethyl cellulose ua ntej tov rau lub hauv paus stirring. Khaws stirring acthlingy kom tiv thaiv kev tsim ntawm txhaws.
Kev sib xyaw: txuas ntxiv nplawm thaum tag nrho cov txheej txheem ntxiv thiab tom qab ntxiv ntxiv rau kom ntseeg tau tias lub cellulose yog tus txheej txheem.
Kev Ntsuas thiab Kev Kho Mob: Kev sim ua kom pom tseeb, cov khoom tseem ceeb ntawm cov khoom siv ntawm cov txheej txheem lossis cov kev faib tawm ntawm cov txheej txheej yog tsim nyog kom ua tiav cov kev cia siab.
3. Kev ceev faj
3.1 Tiv thaiv kev noj
Sprinkling Ceev: sprinkle hydroxyethyl cellulose maj mam kom tsis txhob muaj ntau dhau ib zaug.
Stirring: Ua kom muaj lub zog sib zog ua kom tsis txhob ua txhaum.
3.2 Tswj Kub
Zam kev kub siab: Kev kub siab yuav ua rau kev cuam tshuam ntawm hydroxyethyl cellulose, feem ntau tswj hwm qis dua 50 ° C.
Cua Sov Nruab Nrab: Cua sov me tuaj yeem ua kom nrawm sib tov, tab sis them nyiaj rau kev tswj qhov kub thiab txias.
3.3 PT TSWJ
Nruab Nrab Ib puag ncig: hydrotyl cellulose yog ruaj khov nyob rau hauv nruab nrab nruab nrab lossis me ntsis alkaline ib puag ncig, thiab kev ua kom muaj kev cuam tshuam rau nws txoj kev ruaj khov thiab ua tau zoo.
3.4 Tshuaj Cia
Tiv thaiv cov kab mob sib kis: kev daws teeb meem yooj yim cuam tshuam los ntawm cov kab mob me thiab xav tau ntxiv nrog cov tshuaj tiv thaiv kom muaj txiaj ntsig tsawg.
Txee Lub Neej: Nws raug nquahu kom siv nws sai li sai tau tom qab npaj los ua kom ntseeg tau tias kev ua tau zoo tshaj plaws.
4. Daim ntawv thov rooj plaub
4.1 Sab Hauv Phab Ntsa Xim
Hauv phab ntsa sab hauv looj xim, hydroxyethyl cellulose tuaj yeem muab cov nyhuv zoo, txhim kho kev tsim kho cov kev ua tau zoo thiab zaj duab xis-ua zoo ntawm cov xim.
4.2 Sab Nrauv Ntsa Phab Ntsa Xim
Hauv phab ntsa sab nrauv sab nrauv, ntxiv hydroxyethyl cellulose tuaj yeem txhim kho huab cua tsis kam txhim kho kev pleev xim, thiab pab cov xim sib dhos thiab cov txheej txheem qub ntawm cov txheej.
4.3 Cov Ntoo Ntoo
Hauv cov dej ntawm cov ntoo ntoo, hydroxyethyl cellulose tuaj yeem muab qhov zoo nkauj thiab zoo nkauj, thiab txhim kho ntawm cov txheej txheem.
Raws li cov tuab tuab thiab rheology kho hauv cov txheej txheej, hydroxyethyl cellulose muaj qhov ua tau zoo txhim kho cov nyhuv. Hauv kev ntxiv cov txheej txheem, kev saib xyuas yuav tsum tau them rau nws cov solubility, kev txiav txim ib puag ncig thiab ib puag ncig kom tsis txhob agglomeration thiab kev tsis txaus siab. Hauv kev siv cov kev siv, qhov ua tau zoo thiab ua tau zoo ntawm cov txheej txheem tuaj yeem hloov kho kom zoo dua los ntawm kev siv tau zoo thiab cov kev siv tau.
Lub Sijhawm Post: Feb-17-2025