Ua ib yam khoom siv feem ntau hauv ntau yam lag luam, cellulose ether hmoov muaj kev nplaum zoo heev, ua kom tuab thiab khaws dej tau zoo. Siv dav hauv kev tsim kho, tshuaj, tshuaj pleev ib ce, khoom noj thiab ntau lwm yam teb. Txawm li cas los xij, kom tau txais kev ua tau zoo tshaj plaws los ntawm cellulose ether hmoov, yuav tsum tau them sai sai rau nws cov txheej txheem yaj. Nov yog qee yam tseem ceeb uas yuav tsum xav txog thaum yaj cellulose ether hmoov:
1. Xaiv cov tshuaj yaj uas zoo
Cov hmoov cellulose ether yaj tau zoo heev hauv dej, ua rau cov kua pob tshab thiab khov. Txawm li cas los xij, ntau hom cellulose ethers muaj qhov yaj sib txawv hauv dej, thiab lawv qhov yaj yuav raug cuam tshuam los ntawm cov yam xws li kub thiab pH. Yog li ntawd, kev xaiv cov kuab tshuaj kom zoo rau qhov tshwm sim zoo tshaj plaws yog qhov tseem ceeb.
Piv txwv li, yog tias cov hmoov cellulose ether yuav tsum tau yaj rau hauv qhov chaw kub qis lossis hauv qhov system pH qis, hydroxypropylmethylcellulose (HPMC) lossis methylcellulose (MC) yuav zoo dua li ethylcellulose (EC) lossis carboxylate Zoo dua Xaiv Methylcellulose (CMC). Nws yog ib qho tseem ceeb uas yuav tsum xaiv cov kuab tshuaj tsim nyog xav txog cov kev cai thov thiab cov khoom ntawm cov kuab tshuaj.
2. Tswj qhov kub thiab txias
Kub yog lwm yam tseem ceeb uas cuam tshuam rau kev yaj ntawm cov hmoov cellulose ether. Kev yaj ntawm cov cellulose ethers nce nrog rau qhov kub, tab sis qhov nrawm ntawm kev yaj kuj nce ntxiv, uas tuaj yeem ua rau cov hmoov sib xyaw lossis sib xyaw. Yog li ntawd, qhov kub yuav tsum tau tswj kom zoo thaum lub sijhawm yaj.
Feem ntau hais lus, qhov kub zoo tshaj plaws rau kev yaj cellulose ether yog 20-40 ° C. Yog tias qhov kub qis dhau, nws yuav tsum tau ncua lub sijhawm yaj lossis siv cov kuab tshuaj uas tsim nyog dua. Yog tias qhov kub siab dhau, nws yuav ua rau kev puas tsuaj ntawm cellulose ether thiab cuam tshuam rau nws cov kev ua haujlwm.
3. Do thiab do
Kev sib xyaw thiab kev sib xyaw kuj tseem ceeb thaum yaj cov hmoov cellulose ether. Kev sib xyaw kom zoo pab cov hmoov kom sib npaug hauv cov kuab tshuaj thiab tiv thaiv kev sib sau ua ke. Kev sib xyaw kuj pab ua kom nrawm dua ntawm kev yaj, tshwj xeeb tshaj yog rau cov tshuaj viscosity siab.
Txawm li cas los xij, kev co ntau dhau yuav ua rau muaj cov pa npuas lossis ua npuas dej, uas tuaj yeem cuam tshuam rau qhov meej thiab ruaj khov ntawm cov tshuaj. Yog li ntawd, nws yog qhov tsim nyog los kho qhov ceev thiab qhov muaj zog ntawm kev co raws li qhov xav tau tshwj xeeb thiab qhov chaw siv ntawm cellulose ether hmoov.
4. Cov Khoom Ntxiv
Cov tshuaj ntxiv tuaj yeem ntxiv thaum lub sijhawm yaj ntawm cellulose ether hmoov kom txhim kho nws txoj kev ua haujlwm lossis kev ruaj khov. Piv txwv li, borax lossis lwm yam alkaline tshuaj tuaj yeem ntxiv los kho pH ntawm cov tshuaj thiab ua kom cov viscosity nce ntxiv. Sodium bicarbonate kuj tseem ua rau cov viscosity ntawm cov tshuaj nce ntxiv, ua rau qeeb qeeb ntawm kev yaj.
Tej zaum yuav siv lwm yam khoom ntxiv xws li surfactants, ntsev lossis polymers los txhim kho qhov solubility, stability lossis lwm yam khoom ntawm cov kua cellulose ether. Txawm li cas los xij, nws yog ib qho tseem ceeb uas yuav tsum siv cov khoom ntxiv kom raug thiab xaiv kom zoo, vim tias cov khoom ntxiv ntau dhau lossis tsis tsim nyog yuav ua rau muaj kev phiv tsis xav tau.
5. Lub sijhawm yaj
Lub sijhawm yaj yog ib qho tseem ceeb hauv kev tsim thiab siv cov hmoov cellulose ether. Lub sijhawm yaj nyob ntawm ntau yam xws li hom cellulose ether, cov kuab tshuaj, qhov kub, qhov ceev ntawm kev nplawm thiab kev sib xyaw.
Feem ntau, cov hmoov cellulose ether yuav tsum tau ntxiv rau hauv cov kuab tshuaj maj mam thiab maj mam nrog kev sib tov tas li kom txog thaum tau txais cov tshuaj sib xyaw ua ke. Lub sijhawm yaj tuaj yeem sib txawv ntawm ob peb feeb mus rau ob peb teev, nyob ntawm cov yam ntxwv tau hais los saum toj no.
Nws yog ib qho tseem ceeb uas yuav tsum tau saib xyuas cov txheej txheem yaj thiab kho cov kev ntsuas raws li qhov xav tau kom ntseeg tau tias qhov zoo thiab sib xws ntawm cov kua cellulose ether.
Xaus lus, cellulose ether hmoov yog ib yam khoom siv tau ntau yam thiab muaj nqis hauv ntau qhov chaw lag luam. Txawm li cas los xij, cov txheej txheem yaj yog qhov tseem ceeb kom ua tiav nws qhov kev ua tau zoo tshaj plaws. Los ntawm kev ua tib zoo saib xyuas cov yam xws li kev xaiv cov kuab tshuaj, kev tswj qhov kub, kev sib tov, cov khoom ntxiv, thiab lub sijhawm yaj, nws muaj peev xwm tau txais cov tshuaj cellulose ether zoo uas ua tau raws li cov kev cai thov.
Lub sijhawm tshaj tawm: Lub Yim Hli-18-2023