Kev Taw Qhia ntawm Hydroxyethyl Methyl Cellulose HEMC

Cov Ntaub Ntawv Tseem Ceeb ntawmHydroxyethyl Methyl Cellulose

Lub npe Suav: hydroxyethyl methyl cellulose
Lub npe lus Askiv: Hymetellose328
Suav lub npe: hydroxyethyl methyl cellulose; hydroxyethyl methyl cellulose; hydroxymethyl ethyl cellulose; 2-hydroxyethyl methyl ether cellulose
Lus Askiv lub npe: Methylhydroxyethylcellulose; Cellulose; 2-hydroxyethyl methyl ether; HEMC; Tyopur MH[1]
Tshuaj lom neeg: Hydroxymethylmethylecellulose; Hydroxyethylmethylcellulose; Hydroxymethylethylcellulose.

Cov Molecules: C2H6O2 xCH4O x PhEur 2002 txhais hydroxyethylmethylcellulose ua ib feem O-methylated, ib feem O-hydroxymethylated cellulose. Cov lus qhia sib txawv tau qhia ua cov viscosity pom tseeb hauv mPa s ntawm 2% w/v aqueous kua ntawm 20°C.
Qhov hnyav ntawm cov tshuaj molecular: PhEur 2002 txhais hydroxyethylmethylcellulose ua ib feem O-methylated, ib feem O-hydroxymethylated cellulose. Cov lus qhia sib txawv tau qhia ua cov viscosity pom tseeb hauv mPa s ntawm 2% w/v aqueous kua ntawm 20°C.

Cov yam ntxwv tseem ceeb ntawm hydroxyethyl methyl cellulose (HEMC) yog:

1. Kev yaj: yaj tau hauv dej thiab qee cov kuab tshuaj organic, HEMC tuaj yeem yaj hauv dej txias, nws qhov siab tshaj plaws tsuas yog txiav txim siab los ntawm viscosity, solubility sib txawv nrog viscosity, qhov qis dua qhov viscosity, qhov ntau dua qhov solubility.

2. Kev tiv thaiv ntsev: Cov khoom HEMC yog cov non-ionic cellulose ethers thiab tsis yog polyelectrolytes, yog li ntawd nyob rau hauv qhov muaj cov ntsev hlau lossis cov organic electrolytes, lawv ruaj khov nyob rau hauv cov kua dej, tab sis kev ntxiv ntau dhau ntawm electrolytes tuaj yeem ua rau gelation thiab nag lossis daus.

3. Kev Ua Haujlwm Ntawm Qhov Chaw: Vim tias cov kua dej muaj kev ua haujlwm ntawm qhov chaw, nws tuaj yeem siv ua tus neeg sawv cev tiv thaiv colloid, emulsifier thiab dispersant.

4. Cov tshuaj gel kub: Thaum cov tshuaj HEMC uas muaj dej kub raug cua sov mus rau qhov kub thiab txias, nws yuav ua rau nws tsis pom tseeb, ua rau nws yaj, thiab ua rau nws poob dej, tab sis thaum nws txias tas li, nws yuav rov qab mus rau qhov qub, thiab cov tshuaj gel thiab dej nag no yuav tshwm sim. Qhov kub thiab txias feem ntau nyob ntawm lawv cov roj nplua nyeem, cov khoom pab txhawb nqa, cov tshuaj colloids tiv thaiv, cov tshuaj emulsifiers, thiab lwm yam.

5. Kev tsis muaj zog ntawm cov metabolism thiab tsis muaj ntxhiab tsw qab thiab tsw qab: HEMC siv dav hauv cov khoom noj thiab tshuaj vim nws tsis tau metabolized thiab muaj ntxhiab tsw qab thiab tsw qab tsawg.

6. Tshuaj tua kab mob fungal: HEMC muaj peev xwm ua kom cov kab mob fungal zoo thiab ruaj khov viscosity zoo thaum lub sijhawm khaws cia ntev.

7. PH ruaj khov: Qhov viscosity ntawmHEMCCov kua dej ntawm cov khoom tsis tshua raug cuam tshuam los ntawm cov kua qaub lossis alkali, thiab tus nqi pH ruaj khov nyob rau hauv qhov ntau ntawm 3.0-11.0.

Daim Ntawv Thov: Hydroxyethyl methyl cellulose siv tau ua tus neeg sawv cev tiv thaiv colloid, emulsifier thiab dispersant vim yog lub luag haujlwm ntawm cov kua dej. Ib qho piv txwv ntawm nws daim ntawv thov yog raws li nram no: Cov nyhuv ntawm hydroxyethyl methyl cellulose rau cov yam ntxwv ntawm cement. Hydroxyethyl methylcellulose yog cov hmoov dawb tsis muaj ntxhiab, tsis muaj saj, tsis muaj tshuaj lom uas yaj hauv dej txias los ua cov kua ntshiab, viscous. Nws muaj cov yam ntxwv ntawm kev ua kom tuab, khi, tawg, emulsifying, zaj duab xis-tsim, suspending, adsorbing, gelling, surfactant, khaws cov dej noo thiab tiv thaiv colloids. Vim yog lub luag haujlwm ntawm cov kua dej, nws siv tau ua tus neeg sawv cev tiv thaiv colloid, emulsifier thiab dispersant. Hydroxyethyl methyl cellulose aqueous solution muaj hydrophilicity zoo thiab yog tus neeg sawv cev ua haujlwm siab-tuav dej.