Ulwazi olusisiseko lweHydroxyethyl Methyl Cellulose

Igama lemveliso:i-hydroxyethyl methyl celluloseHEMC

Igama lesiNgesi: Hymetelose

Isibizo: i-methyl hydroxyethyl cellulose; I-MHEC, i-hydroxyethyl methyl cellulose ether;

i-hydroxymethyl ethyl cellulose; I-2-hydroxyethyl methyl ether cellulose

I-alias yesiNgesi: iMethylhydroxyethylcellulose; iSelulosi; I-2-hydroxyethyl methyl ether; I-HEMC; Tyopur MH[1]

IKhemistri: iHydroymethylmethylecellulose; iHydroxyethylmethylcellulose; I-Hydroxymethylethylcellulose.

Iimolekyuli: I-C2H6O2 xCH4O x PhEur 2002 ichaza i-hydroxyethylmethylcellulose njengenxalenye ye-O-methylated, i-O-hydroxymethylated cellulose. Iinkcazo ezahlukeneyo zichazwe ngokwemigaqo ye-viscosity ebonakalayo kwi-mPa ye-2% w / v isisombululo samanzi kwi-20 ° C.

Ubunzima bemolekyuli: I-PhEur 2002 ichaza i-hydroxyethylmethylcellulose njengenxalenye ye-O-methylated, i-O-hydroxymethylated cellulose. Iinkcazo ezahlukeneyo zichazwe ngokwemigaqo ye-viscosity ebonakalayo kwi-mPa ye-2% w / v isisombululo samanzi kwi-20 ° C.

Iimpawu eziphambili ze-hydroxyethyl methyl cellulose (HEMC) zezi:

1. I-Solubility: i-solubility emanzini kunye nezinye i-solvents eziphilayo, i-HEMC inokuchithwa emanzini abandayo, ukugxininiswa kwayo okuphezulu kunqunywe kuphela yi-viscosity, i-solubility iyahluka kunye ne-viscosity, i-viscosity ephantsi, i-solubility enkulu.

2. Ukumelana netyuwa: Iimveliso ze-HEMC ziyi-ethers ze-cellulose ezingenayo i-ionic kwaye azikho i-polyelectrolytes, ngoko ke phambi kweetyuwa zetsimbi okanye i-electrolyte yezinto eziphilayo, zizinzile kwizisombululo zamanzi, kodwa ukongezwa ngokugqithiseleyo kwe-electrolytes kunokubangela i-gelation kunye nemvula.

3. Umsebenzi womphezulu: Njengoko isisombululo samanzi sinomsebenzi womsebenzi ongaphezulu, sinokusetyenziswa njenge-agent ekhuselayo ye-colloid, i-emulsifier kunye ne-dispersant.

4. Ijeli ye-Thermal: Xa isisombululo se-HEMC semveliso yamanzi sifudumala kwiqondo lokushisa elithile, liba li-opaque, i-gel, kwaye lenze i-precipitate, kodwa xa licolile ngokuqhubekayo, libuyela kwisimo sesisombululo sokuqala, kwaye le gel kunye nemvula yenzeke. . Ubushushu buxhomekeke ikakhulu kwii-lubricants zabo, i-aids yokumisa, i-colloids ekhuselayo, i-emulsifiers, njl.

5. I-Metabolic inertness kunye nevumba eliphantsi kunye nevumba: I-HEMC isetyenziswa kakhulu ekutyeni kunye namayeza ngenxa yokuba ayinayo i-metabolized kwaye inevumba eliphantsi kunye nevumba elimnandi.

6. I-Antifungal: I-HEMC inekhono elihle le-antifungal kunye nokuzinza okulungileyo kwe-viscosity ngexesha lokugcinwa kwexesha elide.

7. Ukuzinza kwe-PH: I-viscosity ye-HEMC yemveliso yesisombululo samanzi ayinakuchaphazeleka nge-asidi okanye i-alkali, kwaye ixabiso le-pH lizinzile kuluhlu lwe-3.0-11.0.

Isicelo: I-Hydroxyethyl methyl cellulose ingasetyenziselwa njenge-agent ekhuselayo ye-colloid, i-emulsifier kunye ne-dispersant ngenxa yomsebenzi osebenzayo wesisombululo samanzi. Umzekelo wokusetyenziswa kwawo ngolu hlobo lulandelayo: Umphumo we-hydroxyethyl methyl cellulose kwiipropati zesamente. IHydroxyethyl methylcellulose ngumgubo omhlophe ongenavumba, ongenancasa, ongenatyhefu onyibilika emanzini abandayo ukwenza isisombululo esicacileyo, esibonakalayo. Ineempawu zokuqina, ukubopha, ukusabalalisa, i-emulsifying, ifilimu-ifom, ukumisa, i-adsorbing, i-gelling, i-surface-active, igcina umswakama kunye nokukhusela i-colloids. Ngenxa yomsebenzi osebenzayo wesisombululo se-aqueous, sinokusetyenziswa njenge-colloid ekhuselayo, i-emulsifier kunye ne-dispersant. I-Hydroxyethyl methyl cellulose isisombululo samanzi sine-hydrophilicity elungileyo kwaye sisixhobo sokugcina amanzi ngokufanelekileyo.