Qhov tshwm sim ntawm viscosity nqis thaum lub sijhawm nres tsheb yog qhov teeb meem ntau, tshwj xeeb yog tom qab lub sijhawm tsim khoom, cuam tshuam rau kev tsim kho thiab cov khoom lag luam zoo. Qhov kev txo qis hauv viscosity yog hais txog ntau yam, xws li qhov cua noo, tab sis kev sib cuam tshuam nrog cov tuab tuab ether yog tshwj xeeb.
1. Basic lub luag haujlwm ntawm cellulose ether
Cellulose ether yog ib hom tuab tuab siv hauv cov xim pleev xim rau hauv cov dej. Lawv lub zog tseem ceeb muaj:
Thickening cov nyhuv: cellulose ether tuaj yeem tsim cov qauv siv hluav taws xob o ntawm cov kab ke thiab txhim kho lub viscotropos thiab kev tsim kho ntawm cov xim.
Ncua Kev Ncua Ruaj Ruaj: Cellulose ether tuaj yeem tiv thaiv kom tiv thaiv kom tiv thaiv tau xws li pigments thiab fillers nyob rau hauv cov xim thiab tswj hwm cov ris tsho ntawm cov xim.
Zaj duab xis-ua cov cuab yeej: etherulose ether kuj tuaj yeem cuam tshuam rau zaj duab xis-ua cov khoom ntawm cov xim, ua kom cov txheej xim thiab muaj zog.
Muaj ntau ntau hom cellulose muaj cov neeg muaj cai, suav nrog methyl cellulose (MC), hydroxypropyl cellulose (HECTCC)
2. Cov laj thawj tseem ceeb rau viscosity txo
Thaum lub sij hawm cia ntawm cov txheej txheem, lub viscosity txo yog feem ntau tshwm sim los ntawm cov laj thawj hauv qab no:
(1) kev cuam tshuam ntawm cov kws qhia cellulose
Lub thickening nyhuv ntawm cellulose cov neeg muaj kev hais ua ke nyob ntawm qhov loj me ntawm lawv cov qauv molecular thiab kev ncaj ncees ntawm lawv cov qauv molecular. Thaum lub sijhawm cia Piv txwv li, thaum lub sijhawm khaws cia ntev, cov khoom siv acidic lossis alkaline ntawm cov molecyze, thiab yog li tsis muaj zog nws cov nyhuv tuab, ua rau txo qis hauv viscosity.
(2) Kev daws qhov loj heev thiab noo noo tsiv teb tsaws
Kev daws teeb meem loj lossis noo noo tsiv teb tsaws hauv txheej yuav cuam tshuam rau cov sudubility ntawm lub xeev ether. Thaum lub sijhawm cia
(3) cov microbial nres
Microbial kev loj hlob tuaj yeem tshwm sim hauv txheej thaum nws tau khaws cia tsis raug lossis cov tshuaj tiv thaiv kom ua tau zoo. Cov kab mob me tuaj yeem decompose cellulose cov neeg muaj kev hais txog cellulose thiab lwm yam cov organic thickeners, tsis muaj zog lawv cov nyhuv tuab ntawm txheej kom tsawg dua. Cov dej pleev dej ua tsho, tshwj xeeb, yog ib puag ncig zoo rau microbial kev loj hlob vim tias lawv muaj dej ntau.
(4) Kev Laus Kub
Nyob rau hauv cov kev mob siab, lub cev lossis tshuaj qauv ntawm lub cellulose ither molecular saw yuav hloov. Piv txwv li, cov neeg hais txog cellulose feem ntau tau nquag ua rau oxidation lossis pyrolysis ntawm qhov kub siab dua, ua rau muaj qhov tsis muaj zog ntawm cov nyhuv thickening. Kev kub siab kuj tseem ua kom nrawm nrawm nrawm thiab dej evaporation, txuas ntxiv cuam tshuam rau viscosity stability.
3. Txoj kev txhawm rau txhim kho kev cia khoom ruaj khov ntawm cov txheej txheem txheej txheem
Txhawm rau kom txo qis qis hauv viscosity thaum lub sijhawm cia thiab txuas ntxiv lub neej cia ntawm cov txheej, ntsuas hauv qab no tuaj yeem ua:
(1) Xaiv cov cellulose txoj cai ether
Txawv ntau hom cellulose muaj cov neeg muaj kev sib txawv nyob rau hauv cov nqe lus ntawm kev ruaj khov. Cellulose muaj kev hais ua ke nrog siab molecular hnyav feem ntau muaj cov teebmeem thickening zoo dua, tab sis lawv cov khoom siv hluav taws xob zoo dua nrog cov khoom hnyav me me yuav muaj kev cia khoom qis dua. Yog li ntawd, thaum tsim cov qauv, cellulose muaj cov neeg muaj kev pab muaj kev ruaj khov yuav tsum tau muab sau nrog lwm cov thickeners txhawm rau txhim kho lawv cov khoom tiv thaiv.
(2) tswj lub ph ntawm txheej
Cov acidity thiab alkalinity ntawm txheej txheej txheej muaj qhov tseem ceeb rau kev ruaj ntseg ntawm cov neeg muaj kev hais ua cellulose. Hauv kev tsim qauv tsim qauv, tus nqi ntawm tus nqi yuav tsum tau tswj kom tsis txhob muaj cov acidic los yog alkaline ib puag ncig los txo qhov kev cuam tshuam cellulose. Nyob rau tib lub sijhawm, ntxiv tus nqi tsim nyog ntawm pH tsim nyog los yog ntas tuaj yeem pab ruaj khov rau pheeb suab.
(3) nce kev siv cov tshuaj tiv thaiv
Txhawm rau tiv thaiv microbial yaig, ib tus nqi ntawm cov tshuaj txuag yuav tsum tau ntxiv rau txheej. Cov tshuaj tiv thaiv kev loj hlob tuaj yeem cuam tshuam rau cov kab mob me, yog li tiv thaiv cov tshuaj organic xws li cellulosed thiab tswj qhov ruaj khov ntawm txheej. Tsim nyog cov tshuaj tiv thaiv tsim nyog yuav tsum tau raug xaiv raws li txheej txheem txheej txheem txheej txheem thiab kev cia khoom ib puag ncig, thiab lawv cov txiaj ntsig yuav tsum raug kuaj tsis tu ncua.
(4) tswj qhov chaw cia khoom
Qhov chaw cia kub thiab av noo ntawm txheej muaj qhov cuam tshuam ncaj qha rau lub viscosity stabilabe. Cov txheej yuav tsum tau muab cia rau hauv ib puag ncig qhuav thiab txias, zam kev kub thiab siab vaum mob los txo cov kuab tshuaj loj thiab cellulose ether deg. Ib qho ntxiv, ntim zoo ntim tau zoo txo cov kev tsiv teb tsaws thiab evaporation ntawm dej thiab ncua kev txo qis hauv viscosity.
4. Lwm yam cuam tshuam rau viscosity
Ntxiv rau cellulose cov neeg muaj neeg ua haujlwm, lwm yam hauv txheej txheej txheej txheej yuav tseem cuam tshuam rau kev hloov pauv ntawm viscosity. Piv txwv li, hom thiab concentration cov pigments, tus nqi volatilization ntawm cov kuab tshuaj lossis cov dispersants tuaj yeem cuam tshuam rau viscosity kev ruaj ntseg ntawm txheej. Yog li no, kev tsim txhua yam ntawm cov txheej txheej txheej thiab kev sib cuam tshuam ntawm cov khoom siv kuj tseem muaj cov ntsiab lus tseem ceeb uas yuav tsum tau them nyiaj rau.
Qhov txo qis hauv viscosity thaum lub sij hawm cia ntawm txheej yog ze ze rau qhov kev ua kom muaj kev ua kom muaj kev ua neeg paub, thiab kev tsiv teb tsaws chaw. Txhawm rau txhim kho kev cia ruaj ruaj ntawm cov txheej, tsim nyog cellulose siv tau, kev tiv thaiv kev tiv thaiv corrosion, thiab ib puag ncig kev tsim nyog yuav tsum tau ua kom zoo. Los ntawm cov qauv tsim tsim tsim nyog thiab kev tswj hwm zoo, qhov teeb meem ntawm viscosity txo thaum lub sij hawm muaj txiaj ntsig zoo, thiab cov khoom lag luam muaj peev xwm txhim kho.
Lub Sijhawm Post: Sep-27-2024