Kedu ihe bụ hydroxyethyl methylcellulose?

utu aha: hydroxyethyl methyl cellulose; hydroxyethyl methyl cellulose; hydroxymethyl ethyl cellulose; 2-hydroxyethyl methyl ether cellulose
Utu aha Bekee: Methylhydroxyethylcellulose; Cellulose; 2-hydroxyethyl methyl ether; HEMC; Tyopur MH[1]
Chemistry: Hydroymethylmethylcellulose;Hydroxyethylmethylcellulose; Hydroxymethylethylcellulose.
CAS ndebanye aha: 9032-42-2

Molecule: C2H6O2 xCH4O x PhEur 2002 na-akọwa hydroxyethyl methylcellulose dị ka akụkụ O-methylated, akụkụ O-hydroxymethylated cellulose. A na-egosipụta nkọwa dị iche iche site na uru viscosity pụtara ìhè nke 2% w/v aqueous solution na 20ºC, na unit bụ mPa s.
Ibu ibu: PhEur 2002 na-akọwa hydroxyethyl methylcellulose dị ka akụkụ O-methylated, akụkụ O-hydroxymethylated cellulose. A na-egosipụta nkọwa dị iche iche site na uru viscosity pụtara ìhè nke 2% w/v aqueous solution na 20ºC, na unit bụ mPa s.

Isi njirimara nke hydroxyethyl methylcellulose (HEMC) bụ:

1. Solubility: Soluble na mmiri na ụfọdụ ihe mgbaze organic. Enwere ike ịgbaze HEMC na mmiri oyi. A na-ekpebi itinye uche ya kachasị elu naanị site na viscosity. Solubility dị iche na viscosity. Na ala viscosity, ka ukwuu solubility.

2. Nguzogide nnu: Ngwaahịa HEMC bụ ndị na-abụghị ionic cellulose ethers ma ọ bụghị polyelectrolytes, ya mere, ha na-akwụsi ike na ngwọta mmiri mgbe salts metal ma ọ bụ organic electrolytes dị, ma oke mgbakwunye nke electrolytes nwere ike ime ka gelation na mmiri ozuzo.

3. Ọrụ dị n'elu: N'ihi ọrụ na-arụ ọrụ elu nke ngwọta mmiri, enwere ike iji ya dị ka onye na-echebe colloidal, emulsifier na dispersant.

4. Thermal gel: Mgbe ngwaahịa HEMC na-ekpo ọkụ na-ekpo ọkụ na-ekpo ọkụ na okpomọkụ, ọ na-aghọ opaque, gels, na precipitates, ma mgbe ọ na-anọgide na-ajụ oyi, ọ na-alaghachi na ọnọdụ ngwọta mbụ, na gel na mmiri ozuzo na-eme. Okpomọkụ na-adabere na mmanye ha, ihe ndị na-egbochi ihe enyemaka, colloid nchebe, emulsifiers, wdg.

5. Metabolic inertness na obere isi na isi ísì: A na-eji HEMC eme ihe n'ọtụtụ nri na ọgwụ n'ihi na ọ gaghị emezigharị ya ma nwee obere isi na isi ísì.

6. Nguzogide mildew: HEMC nwere nguzogide mildew dị mma na nkwụsi ike viscosity dị mma n'oge nchekwa ogologo oge.

7. Nkwụsi ike PH: Viscosity nke ngwọta mmiri nke ngwaahịa HEMC adịghị emetụta acid ma ọ bụ alkali, na pH uru dị ntakịrị na nso nke 3.0-11.0.
Ngwa: Enwere ike iji Hydroxyethyl methylcellulose mee ihe dị ka onye na-ahụ maka nchebe colloidal, emulsifier na dispersant n'ihi ọrụ elu ya na-arụ ọrụ na ngwọta mmiri. Ihe atụ ngwa ya bụ nke a: mmetụta nke hydroxyethyl methylcellulose na arụmọrụ nke ciment. Hydroxyethyl methylcellulose bụ ihe na-esighi ísì, enweghị ụtọ, ntụ ntụ ọcha na-adịghị egbu egbu nke enwere ike igbari na mmiri oyi iji mepụta ngwọta viscous na-apụta ìhè. Ọ nwere àgwà nke ndim, njide, na-achụsasị, emulsifying, film-akpụ, suspending, adsorbing, gelling, elu-arụ ọrụ, ịnọgide na-enwe mmiri mmiri na-echebe colloid. Ebe ọ bụ na ngwọta mmiri nwere ọrụ na-arụ ọrụ n'elu, enwere ike iji ya dị ka onye na-echebe colloidal, emulsifier na dispersant. Hydroxyethyl methylcellulose aqueous ngwọta nwere ezigbo hydrophilicity ma bụrụ onye na-ejigide mmiri nke ọma.