Ulwazi Oluyisisekelo lwe-Hydroxyethyl Methyl Cellulose

Igama lomkhiqizo:i-hydroxyethyl methyl celluloseI-HEMC

Igama lesiNgisi: Hymetelose

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

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

Isibizo sesiNgisi: Methylhydroxyethylcellulose; I-cellulose; 2-hydroxyethyl methyl ether; I-HEMC; I-Tyopur MH[1]

I-Chemistry: I-Hydroymethylmethylecellulose; I-Hydroxyethyl methylcellulose; I-Hydroxymethylethylcellulose.

Amangqamuzana: I-C2H6O2 xCH4O x PhEur 2002 ichaza i-hydroxyethylmethylcellulose njengengxenye ye-O-methylated, ingxenye ye-O-hydroxymethylated cellulose. Ukucaciswa okuhlukile kuvezwa ngokuya nge-viscosity ebonakalayo kuma-mPas wesisombululo samanzi esingu-2% w/v ku-20°C.

Isisindo samangqamuzana: I-PhEur 2002 ichaza i-hydroxyethylmethylcellulose njengengxenye ye-O-methylated, ingxenye ye-O-hydroxymethylated cellulose. Ukucaciswa okuhlukile kuvezwa ngokuya nge-viscosity ebonakalayo kuma-mPas wesisombululo samanzi esingu-2% w/v ku-20°C.

Izici eziyinhloko ze-hydroxyethyl methyl cellulose (HEMC) yilezi:

1. I-Solubility: i-solubility emanzini kanye namanye ama-solvents ephilayo, i-HEMC ingancibilika emanzini abandayo, ukugxila kwayo okuphezulu kunqunywa kuphela yi-viscosity, ukuncibilika kuyahlukahluka nge-viscosity, i-viscosity ephansi, i-solubility enkulu.

2. Ukumelana nosawoti: Imikhiqizo ye-HEMC i-non-ionic cellulose ethers futhi ayiwona ama-polyelectrolytes, ngakho-ke phambi kosawoti wensimbi noma ama-electrolyte ephilayo, azinzile kuzixazululo ezinamanzi, kodwa ukwengezwa ngokweqile kwama-electrolyte kungabangela i-gelation kanye nemvula.

3. Umsebenzi ongaphezulu: Njengoba isixazululo esinamanzi sinomsebenzi ongaphezulu, singasetshenziswa njenge-ejenti evikelayo ye-colloid, i-emulsifier ne-dispersant.

4. Ijeli eshisayo: Uma isixazululo samanzi somkhiqizo we-HEMC sishiselwa ekushiseni okuthile, siba yi-opaque, ama-gel, futhi sakha imvula, kodwa lapho sipholile ngokuqhubekayo, sibuyela esimweni sokuqala sesisombululo, futhi le gel kanye nemvula kwenzeka. . Izinga lokushisa lincike ikakhulukazi kumafutha abo, izinsiza zokumisa, ama-colloid okuzivikela, ama-emulsifiers, njll.

5. Ukungabi namandla kwe-Metabolic kanye nephunga eliphansi kanye nephunga elimnandi: I-HEMC isetshenziswa kakhulu ekudleni nasemthini ngenxa yokuthi ayigayelwanga futhi inephunga eliphansi kanye nephunga elimnandi.

6. I-Antifungal: I-HEMC inekhono elihle le-antifungal kanye nokuzinza okuhle kwe-viscosity ngesikhathi sokugcina isikhathi eside.

7. Ukuzinza kwe-PH: I-viscosity yesisombululo se-aqueous somkhiqizo we-HEMC ayithintwa neze i-asidi noma i-alkali, futhi inani le-pH lizinzile uma kuqhathaniswa kububanzi obungu-3.0-11.0.

Isicelo: I-Hydroxyethyl methyl cellulose ingasetshenziswa njenge-ejenti evikelayo ye-colloid, i-emulsifier kanye ne-dispersant ngenxa yomsebenzi osebenzayo wesisombululo esinamanzi. Isibonelo sokusetshenziswa kwawo simi kanje: Umphumela we-hydroxyethyl methyl cellulose ezakhiweni zikasimende. IHydroxyethyl methylcellulose iyimpushana emhlophe engenaphunga, engenabuthi, encibilika emanzini abandayo ukuze yakhe isixazululo esicacile, esibonakalayo. Inezici zokuqina, ukubopha, ukuhlakaza, i-emulsifying, ukwenza ifilimu, ukumisa okwesikhashana, i-adsorbing, i-gelling, i-surface-active, igcina umswakama kanye nokuvikela ama-colloid. Ngenxa yomsebenzi osebenzayo wesisombululo se-aqueous, ingasetshenziswa njenge-ejenti yokuzivikela ye-colloid, i-emulsifier kanye ne-dispersant. Isixazululo samanzi se-Hydroxyethyl methyl cellulose sine-hydrophilicity enhle futhi iyi-ejenti yokugcina amanzi esebenza kahle kakhulu.