Cellulose ether yog ib qho tseem ceeb tsim cov khoom siv uas tseem ceeb uas tau siv nyob rau hauv cov pob zeb thiab kev sib xyaws kom txhim kho lawv cov khoom. Cov haujlwm tseem ceeb ether rau hauv cov pob zeb muaj xws li cov thickening, dej tuav, ncua chaw, txhim kho cov haujlwm, thiab lwm yam.
1. Methyl Cellulose (MC, Methyl Cellulose)
Methylcellulose yog feem ntau hom cellulose ether, uas yog tsim los ntawm hloov qee cov pawg hydroxy nrog cov pab pawg me me nrog cov pab pawg (-och3). Methylcellulose feem ntau ua lub luag haujlwm ntawm thickening thiab dej tuav cia hauv pob zeb. Nws tuaj yeem txhim kho cov kev ntws tsis kam ntawm cov pob zeb ua kom tau, nce cov cohesion ntawm cov pob zeb ua kom tau, txo cov kev tsim kho thiab lub zog ua haujlwm. Tsis tas li ntawd, methylcellulose kuj muaj cov khoom siv ua yeeb yaj kiab zoo, uas tuaj yeem txhim kho lub ntsej muag zoo thiab kev sib txawv ntawm cov qhob saum npoo av.
2. HydroxyPropYthyl cellulose (HPMC, HydroxyPropyyl methyl cellulose)
HydroxyPropy muag yog tsim los ntawm kev qhia ntxiv hydroxypropyl (-ch2chohch3) raws li methylcellulose. HPMC muaj dej zoo dua thiab thickening cov khoom, yog li nws ua kom muaj zog ruaj khov thiab tiv thaiv cov khoom hauv pob zeb. Nws tuaj yeem tswj kav dej zoo nyob rau ntawm cov dej kub thiab tiv thaiv cov dej hauv cov pob zeb ua los ntawm kev ua haujlwm nrawm dhau, yog li txo qhov tshwm sim ntawm cov kab nrib pleb. Tsis tas li ntawd, HPMC tseem tuaj yeem ncua kev nrawm ntawm cov tshuaj tsw qab ntawm cov hmoov av ntawm cov txiv qaub li, pub cov pob zeb ua kom tau lub sijhawm ntev ntev thiab pab txhawb kev tsim kho.
3. Hydroxyethyl cellulose (HEC, Hydroxyethyl cellulose)
Hydroxyethyl cellulose yog tsim los ntawm kev qhia cov pab pawg hydroxyethyl (-ch2ch2oh) rau hauv cellulose molecules. Lub luag haujlwm tseem ceeb ntawm HEC hauv kev ua vaj tse yog kom tuab thiab txhim kho txoj kev sib raug zoo ntawm cov pob zeb. Piv nrog rau lwm cov cellulose neeg muaj kev pab ntawm cellulose, HEC yog ruaj khov nyob rau hauv Alkaline tej yam kev mob, yog li nws tau siv dav hauv kev ua vaj tse. Nws tuaj yeem txhim kho kev ua haujlwm los tiv thaiv kev tiv thaiv kev ua haujlwm ntawm cov pob zeb ua thiab nce cov nyiaj ua kom muaj zog ntawm cov pob zeb. Tshwj xeeb tshaj yog nyob rau hauv npaj-sib xyaw ua ke uas yuav tsum muaj kev tsheb thauj mus los ntev lossis kev thauj mus los tiv thaiv kev noj tshuaj thiab los ntshav.
4. HydroxyPropyl cellulose (HPC, Hydroxyprropyl cellulose)
HydroxyPropyl cellulose yog tsim los ntawm kev qhia txog pawg hydroxypropylropylropyl) (-ch2chohch3) rau hauv cellulose molecule. Zoo ib yam li HPMC, HPC kuj muaj cov khoom siv kom zoo thiab dej khaws cia. Tsis tas li ntawd, HPC kuj muaj qhov zoo thermal stability thiab ua yeeb yaj kiab ua yeeb yam, uas tuaj yeem txhim kho qhov tawg tsis kam thiab ruaj khov. Nyob rau hauv cov kev mob siab, HPC tuaj yeem txo cov dej evaporation hauv pob zeb ua, yog li tiv thaiv kev ua pob zeb tawg.
5. Hydroxyethyl Methyl Cellulose (HEMC, Hydroxyethy Cellulose)
Hydroxyethylcethylcellose yog tsim los ntawm kev qhia cov pab pawg hydroxyethyl mus rau methylcellulose. HEMC sib txuas ua cov yam ntxwv ntawm HEC thiab MC, muaj dej zoo khaws cia thiab thickening cov khoom, thiab tseem tuaj yeem txhim kho lub zog ua haujlwm thiab kav ntev. Nws yog dav siv hauv kev ua vaj tse, tshwj xeeb tshaj yog nyob rau hauv tus kheej-theem cug thiab thermal rwb thaiv tsev cug. HEMC yuav ua tau zoo txhim kho kev tsim kho kev tsim kho kev tsim kho, txo cov dej qias neeg tsis ua kua khib, thiab tiv thaiv cov kab nrib pleb tom qab ziab.
6. Ethyl Cellulose (EC, Ethyl Cellulose)
Ethylcellose yog tsim los ntawm hloov cov pawg hydroxyl hauv cov cellulose molecule nrog cov pab pawg neeg (-oc2h5). EC yog tsis tshua muaj siv rau hauv cov pob zeb ua, tab sis nws ua lub luag haujlwm tseem ceeb hauv kev ua haujlwm tshwj xeeb xws li high-zog qhob thiab tus kheej theem qhob. EC muaj cov khoom siv kom zoo thiab tuaj yeem txhim kho lub zog thiab tawg ntawm cov pob zeb ua. Ib qho ntxiv, EC kuj muaj tshuaj lom neeg tsis zoo thiab muaj kev ruaj khov stability, yog li nws tuaj yeem siv tau zoo nyob hauv qee qhov chaw tshwj xeeb.
7. Methyl Hydrothethyl Cellulose (MHEC, Methyl Hydrotyl cellulose)
Methyl Hydrotyl Cellulose ua ke cov yam ntxwv ntawm MC thiab HEC thiab muaj cov dej ua kom zoo, dej ua kom huv thiab ductility. Lub luag haujlwm tseem ceeb ntawm MHEC hauv cov pob zeb yog txhawm rau txhim kho cov khoom sib txuas lus thiab tawg ntawm cov pob zeb ua. Nws yog tshwj xeeb yog siv nyob rau hauv kev coj tus kheej ua haujlwm thiab kho neeg nplua nuj.
Cellulose muaj kev hais ua ke tau siv dav hauv kev ua vaj tse thiab yog ntau hom. Ntau hom cellulose muaj cov neeg muaj kev paub sib txawv thiab cov khoom sib txawv thiab tuaj yeem ua tau raws li cov haujlwm sib txawv. Xaiv lub cellulose txoj cai eter tuaj yeem txhim kho cov haujlwm ua haujlwm, muaj zog thiab ua kom muaj zog thiab kev ntseeg tau ntawm cov phiaj xwm kev tsim kho. Hauv kev siv cov kev siv, nws yog qhov tsim nyog xaiv hom thiab muab tshuaj ntawm cellulose ether raws li cov kev tsim kho engineering raws li kev ua tiav cov nyhuv zoo tshaj plaws.
Lub Sijhawm Post: Feb-17-2025