Ulwazi olusisiseko lwe-hydroxyethyl methylcellulose
Igama lesiTshayina: Hydroxyethyl methylcellulose
Igama lesiNgesi: Hymetellose328
Isibizo saseTshayina: i-hydroxyethyl methyl cellulose; i-hydroxyethyl methyl cellulose; i-hydroxymethyl ethyl cellulose; I-2-hydroxyethyl methyl ether cellulose
Iziteketiso zesiNgesi: Methylhydroxyethylcellulose; iSelulosi; I-2-hydroxyethyl methyl ether; I-HEMC; Tyopur MH[1]
IKhemistri: I-Hydroymethylmethylcellulose; iHydroxyethylmethylcellulose; I-Hydroxymethylethylcellulose.
Imolekyuli: C2H6O2 xCH4O x PhEur 2002 ichaza i-hydroxyethyl methylcellulose njengenxalenye ye-O-methylated, i-O-hydroxymethylated cellulose. Iimpawu ezahlukeneyo zibonakaliswe ngexabiso elibonakalayo le-viscosity ye-2% w / v isisombululo samanzi kwi-20 ° C, kwaye iyunithi yi-mPa s.
Ubunzima bemolekyuli: I-PhEur 2002 ichaza i-hydroxyethyl methylcellulose njengenxalenye ye-O-methylated, i-O-hydroxymethylated cellulose. Iimpawu ezahlukeneyo zibonakaliswe ngexabiso elibonakalayo le-viscosity ye-2% w / v isisombululo samanzi kwi-20 ° C, kwaye iyunithi yi-mPa s.
Iimpawu eziphambili ze-hydroxyethyl methylcellulose (HEMC) zezi:
1. Ukunyibilika: Ukunyibilika emanzini kunye nezinye izinyibilikisi eziphilayo. I-HEMC inokuchithwa emanzini abandayo. Ingqwalasela yayo ephezulu inqunywe kuphela yi-viscosity. Ukunyibilika kuyahluka 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 zizinzile kwizisombululo ezinamanzi xa iityuwa zetsimbi okanye i-electrolytes ephilayo zikhona, kodwa ukongezwa ngokugqithiseleyo kwe-electrolytes kunokubangela i-gelation kunye nemvula.
3. Umsebenzi womphezulu: Ngenxa yomsebenzi osebenzayo wesisombululo samanzi, unokusetyenziswa njenge-colloidal ekhuselayo, i-emulsifier kunye ne-dispersant.
4. Ijeli ye-Thermal: Xa isisombululo se-HEMC se-aqueous sifudumala kwiqondo lokushisa elithile, liba li-opaque, i-gel, kunye ne-precipitates, kodwa xa licolile ngokuqhubekayo, libuyela kwisimo sesisombululo sokuqala, kwaye i-gel kunye nemvula yenzeke. Ubushushu buxhomekeke ikakhulu kwii-lubricants zabo, i-aids yokumisa, i-colloids ekhuselayo, i-emulsifiers, njl.
5. I-inertness ye-Metabolic kunye nevumba eliphantsi kunye nevumba elimnandi: I-HEMC isetyenziswa kakhulu ekutyeni kunye namayeza ngenxa yokuba ayiyi kuxutywa kwaye inevumba eliphantsi kunye nevumba.
6. Ukumelana nokungunda: I-HEMC inokumelana nokungunda okulungileyo kunye nokuzinza okuhle kwe-viscosity ngexesha lokugcinwa kwexesha elide.
7. Ukuzinza kwe-PH: I-viscosity yesisombululo samanzi seemveliso ze-HEMC ayinakuchaphazeleka nge-asidi okanye i-alkali, kwaye ixabiso le-pH lizinzile kuluhlu lwe-3.0-11.0.
Isicelo: I-Hydroxyethyl methylcellulose ingasetyenziselwa njenge-agent ekhuselayo ye-colloidal, i-emulsifier kunye ne-dispersant ngenxa yomsebenzi wayo osebenzayo kwisisombululo samanzi. Umzekelo wayo wesicelo ulandelayo: impembelelo ye-hydroxyethyl methylcellulose ekusebenzeni kwesamente. IHydroxyethyl methylcellulose ngumgubo omhlophe ongenavumba, ongenancasa, ongenatyhefu onokunyibilika emanzini abandayo ukwenza isisombululo se-viscous esicacileyo. Ineempawu zokuqina, ukubopha, ukusabalalisa, i-emulsifying, ifilimu-ifom, ukumisa, i-adsorbing, i-gelling, i-surface esebenzayo, ukugcina umswakama kunye nokukhusela i-colloid. Ekubeni isisombululo esinamanzi sinomsebenzi osebenzayo, sinokusetyenziswa njenge-agent ekhuselayo ye-colloidal, i-emulsifier kunye ne-dispersant. I-Hydroxyethyl methylcellulose isisombululo samanzi sine-hydrophilicity elungileyo kwaye sisixhobo esisebenzayo sokugcina amanzi.
Ixesha lokuposa: Nov-17-2022