Kev tsim kho-cov cellulose muaj neeg muaj kev hais txog (cellulose ether) yog polymer sib txuas tau los ntawm kev siv tshuaj lom neeg cov tshuaj tiv thaiv kev siv tshuaj lom neeg. Lawv tau siv dav hauv cov ntaub ntawv xws li tshuaj cug, tsho loj, thiab cov nplaum hauv kev tsim kho. Cov neeg hais ua neeg hais ua neeg hais tau hais tau tuaj yeem faib ua ntau hom raws li lawv cov qauv molecular thiab cov khoom. Hom Hom muajMethyl cellulose ether (mc),hydroxyethyl cellulose ether (HEC),HydroxyPropyyl Methylcellulose (HPMC)thiab lawv cov derivatives. Cov cellulose cov neeg muaj kev hais tau nyias muaj nyias lub cev thiab tshuaj lom neeg thiab haum rau cov khoom sib txawv hauv tsev thiab cov txheej txheem tseev kom ua.
1. Methyl Cellulose ether (MC)
Methyl cellulose ether yog qhov ntxov tshaj plaws cellulose cellulose cellulose ether thiab ib qho ntawm feem ntau cov kev tsim kho-cellulose neeg. Nws cov yam ntxwv tseem ceeb muaj xws li:
Solubility:MC tuaj yeem tsim lub pob tshab colloidal tov hauv dej txias.
Thickening:Hauv kev tsim kho cug, MC tuaj yeem ua kom nce cov tshuaj tua kab mob ntawm kev daws teeb meem thiab txhim kho kev sib xyaw ntawm lub cug.
Dej khaws cia:MC muaj cov dej ua kom zoo thiab tuaj yeem tiv thaiv cov kab cug los ntawm kev khib dhau sai sai dhau thaum kev tsim kho, yog li ua kom muaj kev tsim kho kev tsim kho thiab lub zog tom qab.
Kev Siv Ua Haujlwm:Nws tuaj yeem txhim kho qhov ua haujlwm cug tshuaj cug thiab txuas lub sijhawm qhib, ua rau nws yooj yim dua ua haujlwm thaum lub sijhawm kev tsim kho.
2. Hydroxyethyl cellulose ether (HEC)
Hydroxyethyl cellulose ether yog cellulose ether nrog hydroxyethyl pawg qhia qhia ntawm cov cellulose molecule. Nws cov yam ntxwv tseem ceeb muaj xws li:
Solubility:Hec tuaj yeem yaj tau sai sai hauv dej los ua cov tshuaj pleev pob tshab.
Thickening:Piv nrog MC, HEC muaj cov nyhuv tuab tuab tuab thiab feem ntau siv nyob rau hauv cov ntaub ntawv tsim tsev uas xav tau rheology thiab viscosity ntau dua.
Dej khaws cia:HEC muaj cov dej ua kom zoo thiab tuaj yeem ua kom lub tshuaj khib ntub rau lub sijhawm ntev los tiv thaiv cov tshuaj khib los ntawm ziab thiab tawg.
Kev tawm tsam raug tshem tawm:HEC tuaj yeem txhim kho kev kawm raug tshem tawm ntawm cov khoom hauv cov slurry kom tsis txhob muaj kev ua yeeb yam lossis cov nag los nag.
Anti-khov:HEC muaj kev yoog tau zoo rau tsawg zaus kub thiab tuaj yeem siv rau hauv ib puag ncig txias.
3. HydroxyPropyyl Metthylcellulose (HPMC)
HydroxyPropyyl methylulose yog lub cellulose ether tau los ntawm hloov cov pab pawg hydroxyl ntawm lub cellulose nrog cov pab pawg hydroxyprropuel. Nws cov yam ntxwv tseem ceeb muaj xws li:
Solubility:HPMC tuaj yeem yaj tau sai sai hauv dej los ua ib qho pob tshab colloid nrog viscosity siab.
Thickening thiab ruaj khov:HPMC muaj cov nyhuv tuab tuab tuab. Thaum nce cov khoom lag luam viscosity, nws tuaj yeem tswj hwm qhov ruaj khov ntawm lub tshuaj khib thiab txo cov khoom siv nag lossis daus.
Kev kub siab kuj:Piv nrog MC thiab HEC, HPMC muaj qhov ntsuas kom muaj zog dua, yog li nws yog qhov tsim nyog rau kev tsim kho hauv qee qhov chaw kub.
Hydrolysis Kuj:HPMC muaj kev nyab xeeb hydrolysis ruaj khov thiab yog qhov tsim nyog rau kev siv hauv cov pej xeem noo.
4. Kev ua kom muaj cov khoom siv ntawm cellulose
Daim ntawv thov cov neeg muaj kev pab cuam ntawm kev tsim kho hauv kev tsim kho kev tsim kho tsuas yog nyob ntawm nws cov khoom muaj ntau yam, tshwj xeeb tshaj yog cov tshuaj khib, txheej, thiab cov nplaum. Cov hauv qab no yog ntau txoj kev ua kom pom tseeb ntawm cov neeg muaj kev hais ua cellulose:
Thickening:Cellulose hais tau txhim kho kev tsim kho kev tsim kho ntawm cov txheej txheem tsim kho lossis kev nplua nuj los ntawm kev nce viscosity ntawm cov kua, thiab muaj cov zoo nkauj thiab ductility.
Dej khaws cia:Nyob rau hauv xis mas cultives thiab lwm cov ntaub ntawv hauv tsev, cov dej khaws cov neeg muaj kev pab ntawm cellulose sai sai, ua kom cov khoom zoo tshaj plaws thaum lub sijhawm ua haujlwm, thiab lub sijhawm ua haujlwm ntev.
Tawg tsis kam:Cellulose ether tuaj yeem txhim kho cov khoom tawg tsis kam ntawm cov ntaub ntawv thiab txo cov kab nrib pleb tshwm sim los ntawm kev muab cov kab nrib pleb lossis sab nraud.
Kev Ua Haujlwm:Kev siv cov cellulose ether tuaj yeem txhim kho kev tsim kho cov ntaub ntawv ntawm cov ntaub ntawv thiab txhim kho kev ua haujlwm ua haujlwm.
Los tiv thaiv sedimentation:Tshwj xeeb tshaj yog nyob rau hauv kev siv ntub dej, cellulose ether tuaj yeem txo cov kev ua kom haum ntawm cov khoom sib xyaw thiab ua kom muaj kev sib xws ntawm slurry.
5. Daim Ntawv Thov
Kev tsim kho-cellulose ether tsuas yog siv nyob rau hauv cov hom ntawv hauv tsev no:
Tshuaj khib:Cellulose ether tuaj yeem txhim kho kev ua haujlwm, dej tawm tsam thiab tiv thaiv kab cug, tshuaj khib, kho cug, kho cug, thiab lwm yam.
Xim:Cellulose ether tuaj yeem siv los ua cov tuab thiab tsis sib xws hauv cov xim pleev xim kom zoo thiab cov xim pleev xim.
Npluas:Ntxiv cov cellulose ether rau cov mis ntawm cov nplaum pab kom nce viscosity ntawm cov nplaum thiab txhim kho kev tsim kho.
Qhuav-Mixed:Siv hauv cov tshuaj khib qhuav, nws muab ib qho kev ua kom tuab thiab ua kom huv si los xyuas kom meej tias nws tsis yooj yim rau lub hnub qub kev tsim kho.
Kev siv cellulose ether muaj cov kev cia siab thov kom muaj kev lag luam vim nws cov tuab heev, dej tsis kam kam thiab lwm yam khoom. Ntau homNeeg muaj neeg ua haujlwm(xws li MC, HEC, HPMC) muaj cov yam ntxwv sib txawv thiab kev thov sib tw. Xaiv lub cellulose txoj cai ether tuaj yeem ua tiav kev ua tau zoo tshaj plaws thiab cuam tshuam hauv cov ntaub ntawv tsim tsev. Nrog rau kev txhim kho kev siv tshuab thiab hloov hauv kev thov, ntau yam thiab cov khoom siv ntawm cellulose tas li thiab lawv cov derivative cellulos thiab lawv cov derivative yuav tshwm sim yav tom ntej.
Lub sijhawm Post: Feb-15-2025