Hydroxypropyl methylcellulose (INN aha: Hypromellulose), nke akpọkwara dị ka hydroxypropyl methylcellulose (HPMC), bụ ụdị dị iche iche nke na-abụghị ionic cellulose agwakọta ethers.

Hydroxypropyl methylcellulose(Aha INN:Hypromellulose), na-abiri dị kahydroxypropyl methylcellulose (HPMC), bụ ihe dị iche iche na-abụghị ionic cellulose agwakọta ethers. Ọ bụ ọkara sịntetik, anaghị arụ ọrụ, polymer viscoelastic a na-ejikarị dị ka mmanu na ophthalmology, ma ọ bụ dị ka ihe mgbakwunye ma ọ bụ ihe mgbakwunye na ọgwụ ọnụ, nke a na-ahụkarị n'ụdị ngwa ahịa dị iche iche.

Dị ka ihe mgbakwunye nri, hydroxypropyl methylcellulose nwere ike ịrụ ọrụ ndị a: emulsifier, thickener, ihe nkwusioru, na ihe nnọchi maka gelatin anụmanụ. Koodu Codex Alimentarius bụ E464.

ihe onwunwe kemịkalụ

Emechara ngwaahịa nkehydroxypropyl methyl cellulosebụ ntụ ntụ ọcha ma ọ bụ na-acha ọcha siri ike fibrous siri ike, nke nwere nha nha na-agafe na sieve 80 ntupu. Ogo dị iche iche nke methoxy na hydroxypropyl ọdịnaya na viscosity nke ngwaahịa emechara na-eme ka ọ bụrụ ụdị dị iche iche nwere ọdịiche dị na arụmọrụ. O nwere njiri mara nke ịdị na-agbaze na mmiri oyi na nke a na-apụghị ịsacha na mmiri ọkụ dị ka methylcellulose, na solubility ya na ihe mgbaze organic karịrị nke mmiri. Ọ nwere ike ịgbaze na methanol anhydrous na ethanol, yana chlorinated hydrocarbons dị ka dichloromethane, trichloroethane, na ihe mgbaze organic dị ka acetone, isopropanol, na mmanya diacetone. Mgbe agbazere n'ime mmiri, ọ na-ejikọta ya na ụmụ irighiri mmiri na-emepụta colloid. Ọ kwụsiri ike na acids na ntọala ma ọ naghị emetụta ya n'ime pH nke 2-12. Ọ bụ ezie na hydroxypropyl methylcellulose adịghị egbu egbu, ọ na-ere ọkụ ma nwee ike imeghachi omume ike na oxidants [5].

The viscosity nkeNgwaahịa HPMCna-abawanye na mmụba nke itinye uche na ịdị arọ molekụla. Mgbe okpomọkụ na-ebili, viscosity na-amalite ịda. Mgbe okpomọkụ ahụ ruru ụfọdụ okpomọkụ, viscosity na-ebili na mberede na gel na-eme. Igwe ọkụ gel nke ngwaahịa viscosity dị ala dị elu karịa nke ngwaahịa viscosity dị elu. Ngwọta mmiri ya na-akwụsi ike na ụlọ okpomọkụ na n'ozuzu ọ nweghị mmebi nke viscosity ma e wezụga maka mmebi enzymatic. Ọ nwere pụrụ iche thermal gelling Njirimara, ọma film akpụ arụmọrụ na elu ọrụ.

Nkwadebe

Mgbe ejiri alkali gwọọ cellulose, enwere ike ịgbakwunye alkoxy anion nke hydroxyl deprotonation mepụtara na epoxy propane iji mepụta.hydroxypropyl cellulose ether; Ọ nwekwara ike iji methyl chloride gbakọta iji mepụta methyl cellulose ether. Mgbe mmeghachi omume abụọ ahụ na-eme n'otu oge,hydroxypropyl methyl cellulosena-emepụta.

ebumnuche

Ojiji nkehydroxypropyl methyl celluloseyiri ndị ọzọcellulose ethers, tumadi eji dị ka a dispersant, nkwusioru gị n'ụlọnga, thickener, emulsifier, stabilizer, na nrapado na dị iche iche ubi. Ọ dị elu karịa ether cellulose ndị ọzọ n'ihe gbasara solubility, dispersibility, transparency, and enzyme resistance.

N'ime nri na ụlọ ọrụ ọgwụ, a na-eji ya dị ka ihe mgbakwunye. N'ihi ihe nrapado ya, ihe na-emepụta ihe nkiri, ịgbasa na ịgbasa n'ime mmiri mmiri, yana ike ya igbochi ntinye mmanụ na ịnọgide na-enwe mmiri mmiri, a na-eji ya eme ihe dị ka ihe ntanye, thickener, dispersant, reliever, stabilizer, and emulsifier. Ọ nweghị nsí, ọ dịghị uru oriri na-edozi ahụ, ọ dịghịkwa mgbanwe metabolic.

Na mgbakwunye,HPMCnwere ngwa na mmeghachi omume resin polymerization sịntetik, petrochemicals, ceramics, ime akwụkwọ, akpụkpọ anụ, ihe ịchọ mma, mkpuchi, ihe owuwu ụlọ, na efere mbipụta foto.