Kev faib tawm hydroxyethyl cellulose (HEC) yog ib qho kev ua haujlwm uas xav tau cov kauj ruam tshwj xeeb kom ua raws, tshwj xeeb tshaj yog nyob rau hauv cov dej nruab nrab. Cov kauj ruam faib tawm thiab yaj kom raug tuaj yeem ua kom nws siv tau zoo. Hydroxyethyl cellulose yog siv dav hauv cov txheej txheem, cov nplaum, cov tshuaj pleev ib ce, cov roj thiab lwm yam teb vim nws cov thickening, stabilization, zaj duab xis-tsim, moisturizing thiab lwm yam haujlwm.
Kev Taw Qhia Txog Hydroxyethyl Cellulose
Hydroxyethyl cellulose yog cov dej-soluble non-ionic cellulose ether ua los ntawm kev hloov kho tshuaj ntawm cov cellulose ntuj. Nws muaj kev yaj zoo heev thiab cov teebmeem thickening, thiab tuaj yeem tsim cov kua dej pob tshab, viscous. HEC kuj muaj kev kam rau dej ntsev zoo heev, yog li nws tshwj xeeb tshaj yog tsim rau cov dej hiav txwv lossis cov kab ke uas muaj ntsev. Tib lub sijhawm, nws tuaj yeem ruaj khov ntawm ntau yam pH thiab tsis cuam tshuam los ntawm cov kua qaub thiab alkali ib puag ncig.
Txoj cai ntawm kev tawg ntawm hydroxyethyl cellulose
Hauv dej, cov txheej txheem dispersion ntawm hydroxyethyl cellulose suav nrog ob kauj ruam tseem ceeb: ntub dispersion thiab tag nrho dissolution.
Kev tawg ua ntub dej: Qhov no yog cov txheej txheem ntawm kev ua cov hydroxyethyl cellulose me me sib npaug hauv dej. Yog tias HEC ntxiv ncaj qha rau hauv dej, nws yuav nqus dej sai sai thiab tsim cov pob nplaum rau ntawm qhov chaw, uas cuam tshuam kev yaj ntxiv. Yog li ntawd, thaum lub sijhawm tawg ua ntu zus, kev tsim cov pob zoo li no yuav tsum tau zam ntau li ntau tau.
Kev yaj tag nrho: Tom qab ntub dej, cov cellulose molecules maj mam diffuse mus rau hauv dej los tsim ib qho kev daws teeb meem. Feem ntau, HEC yaj qeeb qeeb thiab yuav siv sijhawm ob peb teev lossis ntev dua, nyob ntawm qhov kub ntawm dej, kev sib xyaw thiab qhov loj ntawm cellulose.
Cov kauj ruam dispersion ntawm hydroxyethyl cellulose
Yuav kom ntseeg tau tias hydroxyethyl cellulose tuaj yeem sib kis tau zoo, cov kauj ruam dispersion hauv qab no feem ntau siv:
1. Xaiv qhov kub ntawm dej kom raug
Qhov kub ntawm dej yog ib qho tseem ceeb uas cuam tshuam rau qhov kev sib kis thiab kev yaj ntawm hydroxyethyl cellulose. Feem ntau, dej txias lossis dej kub hauv chav yog qhov chaw yaj zoo tshaj plaws. Dej sov (kwv yees li 30-40 ° C) pab kom yaj sai dua, tab sis qhov kub ntawm dej siab dhau (tshaj 50 ° C) yuav ua rau muaj cov pob thaum lub sijhawm yaj, uas yuav cuam tshuam rau qhov cuam tshuam ntawm kev yaj.
2. Kev kho mob ua ntej ntub dej
Hydroxyethyl cellulose feem ntau ua rau cov clumps sai sai hauv dej, yog li kev kho ua ntej ntub dej yog ib txoj kev sib kis zoo. Los ntawm kev sib xyaw HEC nrog cov organic solvent uas yaj tau hauv dej (xws li ethanol, propylene glycol, thiab lwm yam), HEC tau ntub dej sib npaug kom tiv thaiv nws kom tsis txhob nqus dej ncaj qha thiab tsim cov pob. Txoj kev no tuaj yeem txhim kho qhov kev ua haujlwm tom qab.
3. Tswj qhov ceev ntawm kev ntxiv
Thaum dispersing hydroxyethyl cellulose, cov hmoov yuav tsum tau nchuav rau hauv dej qeeb qeeb thiab sib npaug thaum do. Qhov ceev ntawm lub stirrer yuav tsum tsis txhob siab dhau kom tiv thaiv kev ua npuas ntau dhau. Yog tias qhov ceev ntxiv yog ceev dhau, HEC yuav tsis raug dispersed tag nrho, tsim cov micelles tsis sib npaug, uas yuav cuam tshuam rau cov txheej txheem dissolution tom qab.
4. Kev sib xyaw
Kev nplawm yog ib qho tseem ceeb tshaj plaws hauv cov txheej txheem dispersion. Nws raug pom zoo kom siv lub stirrer qis-ceev kom nplawm tas li kom ntseeg tau tias hydroxyethyl cellulose tuaj yeem faib sib npaug thoob plaws hauv lub cev kua. Kev nplawm ceev ceev yuav ua rau HEC sib sau ua ke, ua rau lub sijhawm yaj ntxiv, thiab tsim cov npuas, cuam tshuam rau qhov pom tseeb ntawm cov tshuaj. Feem ntau, lub sijhawm nplawm yuav tsum tswj tau ntawm 30 feeb thiab ob peb teev, nyob ntawm cov khoom siv siv thiab qhov kub ntawm dej.
5. Ntxiv cov electrolytes los yog kho pH
Qee zaum, cov txheej txheem yaj ntawm hydroxyethyl cellulose tuaj yeem ua kom nrawm dua los ntawm kev ntxiv cov electrolytes tsim nyog (xws li ntsev) lossis kho qhov pH. Txoj kev no yog qhov tsim nyog rau cov ntawv thov uas muaj cov kev xav tau siab rau kev yaj sai. Txawm li cas los xij, qhov ntau ntawm electrolyte lossis pH yuav tsum tau kho kom zoo kom tsis txhob cuam tshuam rau kev ua haujlwm ntawm HEC.
Cov Teeb Meem thiab Kev Tiv Thaiv Feem Ntau
Kev Sib Sau Ua Ke: Qhov teeb meem feem ntau ntawm HEC yog kev sib sau ua ke thaum lub sijhawm yaj, uas ua rau yaj tsis tiav. Yuav kom tsis txhob muaj qhov no, koj tuaj yeem siv txoj kev ua ntej ntub lossis sib tov HEC nrog lwm cov hmoov (xws li cov khoom sau, cov xim, thiab lwm yam) thiab tom qab ntawd ntxiv rau hauv dej.
Kev yaj qeeb qeeb: Yog tias qhov kev yaj qeeb qeeb, koj tuaj yeem ua kom qhov kev yaj sai dua los ntawm kev ua kom zoo dua lossis ua kom qhov kub ntawm dej nce ntxiv. Tib lub sijhawm, koj tuaj yeem sim siv HEC tam sim ntawd, uas tau kho tshwj xeeb kom yaj sai hauv lub sijhawm luv dua.
Teeb meem npuas: Cov npuas yooj yim tsim thaum lub sijhawm do, cuam tshuam rau qhov pom tseeb thiab qhov ntsuas viscosity ntawm cov tshuaj. Hauv qhov no, txo qhov ceev ntawm kev do lossis ntxiv cov tshuaj defoaming kom tsim nyog tuaj yeem txo qhov kev tsim ntawm cov npuas.
Cov kev ceev faj rau kev siv hydroxyethyl cellulose
Hauv kev siv ua haujlwm, hom thiab txoj kev ntxiv ntawm hydroxyethyl cellulose yuav tsum tau xaiv raws li qhov xav tau ntawm ntau lub tshuab sib txawv. Piv txwv li, hauv kev lag luam coatings, hydroxyethyl cellulose tsis yog tsuas yog siv ua cov khoom tuab xwb, tab sis kuj tuaj yeem txhim kho rheology, zaj duab xis tsim thiab kev ruaj ntseg ntawm cov txheej. Hauv kev lag luam roj av, qhov tsis kam ntawm HEC yog qhov tseem ceeb heev, yog li qhov kev xaiv yuav tsum tau kho raws li cov xwm txheej downhole.
Kev faib hydroxyethyl cellulose yog ib txoj haujlwm siv tshuab heev, thiab nws yog ib qho tsim nyog los xaiv txoj kev faib tawm kom haum raws li cov xwm txheej siv sib txawv. Los ntawm kev tswj qhov kub ntawm dej, kev ntub ua ntej kom zoo, kev sib xyaw kom haum thiab ntxiv cov khoom ntxiv kom haum, nws tuaj yeem ua kom hydroxyethyl cellulose sib npaug thiab yaj tag nrho hauv dej, yog li ua kom nws cov haujlwm tuab thiab ruaj khov.
Lub sijhawm tshaj tawm: Lub Kaum Hli-23-2024