Raws li cov khoom siv uas nquag siv nyob rau hauv ntau qhov kev lag luam, cellulose wberh hmoov muaj adhesion zoo heev, tuab thiab dej tuav cia. Dav siv hauv kev tsim kho, cov tshuaj, tshuaj pleev ib ce, khoom noj thiab ntau lwm cov teb. Txawm li cas los xij, kom tau txais kev ua tau zoo tshaj plaws los ntawm cellulose ether cov hmoov, xim yuav tsum tau them rau nws cov txheej txheem. Ntawm no yog qee qhov tseem ceeb los txiav txim siab thaum discolt cellulose ithere hmoov:
1. Xaiv cov kuab tshuaj
Cellulose wbish hmoov yog heev soluble hauv dej, sib sau ua pob tshab, daws teeb meem. Txawm li cas los xij, ntau hom cellulose muaj cov neeg muaj sib txawv ntawm solubility hauv dej, thiab lawv solubility yuav raug cuam tshuam los ntawm cov yam ntxwv xws li kub thiab pH. Yog li ntawd, xaiv txoj cai hnyav rau kev ua tau zoo tshaj plaws yog qhov tseem ceeb.
Piv txwv li, yog tias lub cellulose ither hmoov yuav tsum tau yaj nyob ib puag ncig kub tsawg, MC) lossis carboxylate zoo xaiv metylcellulose (cmc). Nws yog ib qho tseem ceeb kom xaiv cov kuab tshuaj uas tsim nyog xaiv cov ntaub ntawv yuav tsum tau ua thiab cov yam ntxwv ntawm cov kuab tshuaj.
2. Tswj kub
Qhov kub yog lwm qhov tseem ceeb tau cuam tshuam rau kev sib cais ntawm cellulose ither hmoov. Lub solubility ntawm cellulose cov neeg hais ua haujlwm nce nrog qhov kub thiab txias, tab sis yog li tus nqi ntawm kev sib, uas tuaj yeem ua rau agglomerated lossis agglomerated hmoov. Yog li ntawd, qhov kub yuav tsum tau ua tib zoo tswj tau thaum lub sijhawm ua tiav cov txheej txheem.
Feem ntau hais lus, qhov kub tshaj plaws rau dissolving cellulose ether yog 20-40 ° C. Yog tias qhov ntsuas kub tsawg dhau, nws yuav tsim nyog rau lub sijhawm ntev lossis siv cov kuab feem ntau. Yog tias qhov ntsuas kub dhau lawm, nws yuav ua rau muaj kev cuam tshuam ntawm cellulose ether thiab cuam tshuam nws cov kev ua tau zoo.
3. Do thiab do
Stirring thiab ntxhov siab tseem ceeb heev thaum dispolt cellulose ither hmoov. Tsim nyog kev ntxhov siab pab cov hmoov kom tawg covyees hauv cov kuab tshuaj thiab tiv thaiv clumping. Stirring kuj pab txhawb kom tus nqi ntawm kev sib nrauj, tshwj xeeb tshaj yog rau cov kev daws teeb meem siab.
Txawm li cas los xij, ntau dhau lawm yuav tsim kom muaj huab cua npuas los yog ua npuas dej, uas tuaj yeem cuam tshuam cov kev pom tseeb thiab kev ruaj khov ntawm kev daws teeb meem. Yog li ntawd, nws yog ib qho tsim nyog los kho cov nplawm nrawm thiab siv raws li cov kev cai tshwj xeeb thiab kev thov ntawm cellulose hmoov.
4. Ntxiv
Cov ntxiv ntxiv tuaj yeem ntxiv thaum lub sij hawm sib cais ntawm cov cellulose aters hmoov los txhim kho nws txoj kev ua tau zoo lossis kev ruaj khov. Piv txwv li, Borax lossis lwm yam tshuaj Alkaline tuaj yeem raug ntxiv los kho cov ph ntawm cov kev daws teeb meem thiab nce viscosity. Sodium Bicarbonate kuj tseem nce viscosity ntawm kev daws, qeeb qeeb ntawm tus nqi ntawm kev sib cais.
Lwm yam kev sib ntxiv xws li surfactants, ntsev tau siv los txhim kho solubility, ruaj khov los yog lwm yam khoom ntawm lub cellulose ether. Txawm li cas los xij, nws yog ib qho tseem ceeb uas yuav tau siv cov khoom sib ntxiv hauv kev sim thiab xaiv tau zoo, raws li ntau dhau los yog tsis muaj kev sib deev uas tsis tsim nyog yuav ua rau cov kev mob tshwm sim tsis zoo.
5. Dhuav sijhawm
Lub sijhawm xaus yog lub sijhawm tseem ceeb hauv kev tsim khoom thiab kev siv ntawm cellulose ither hmoov. Lub sijhawm xaus nyob ntawm ntau yam xws li hom cellulose ether, daws, kub, nplawm.
Feem ntau, cellulose wbisth hmoov yuav tsum tau ntxiv rau cov kuab tshuaj maj mam thiab maj mam nrog kev sib tov tas li kom txog thaum homogeneous daws tau. Lub sijhawm kawg tuaj yeem sib txawv ntawm ob peb feeb txog rau ob peb teev, nyob ntawm qhov xwm txheej uas tau hais los saud.
Nws yog ib qho tseem ceeb kom ua tib zoo saib xyuas cov txheej txheem sib cais thiab kho tsis raws li qhov xav tau kom ntseeg tau tias qhov zoo thiab xwm yeem ntawm lub cellulose ether.
Hauv kev xaus, cellulose wberher hmoov yog ib cov khoom siv ntau thiab muaj txiaj ntsig hauv ntau daim teb. Txawm li cas los xij, txheej txheem sib cais yog qhov tseem ceeb kom ua tiav nws txoj kev ua tau zoo. Los ntawm kev them nyiaj rau yam xws li kev xaiv cov kuab tshuaj, nplawm, thiab lub sijhawm muaj txiaj ntsig, nws yog qhov ua tau kom tau txais cov tshuaj etherolle uas ua tau raws li cov cai thov.
Lub sij hawm Post: Aug-18-2023