Hydroxypropyl methylcellulose (orukọ INN: Hypromellulose), tun abbreviated bi hydroxypropyl methylcellulose (HPMC), jẹ orisirisi ti kii ionic cellulose adalu ethers.

Hydroxypropyl methylcellulose(orukọ INN:Hypromellulose), tun abbreviated bihydroxypropyl methylcellulose (HPMC), jẹ orisirisi ti kii ionic cellulose adalu ethers.O jẹ ologbele sintetiki, aiṣiṣẹ, polima viscoelastic ti o wọpọ ti a lo bi lubricant ni ophthalmology, tabi bi ajumọṣe tabi alayọ ninu oogun ẹnu, ti a rii ni ọpọlọpọ awọn iru awọn ọja.

Gẹgẹbi afikun ounjẹ, hydroxypropyl methylcellulose le ṣe awọn ipa wọnyi: emulsifier, thickener, oluranlowo idadoro, ati aropo fun gelatin eranko.Koodu Codex Alimentarius jẹ E464.

kemikali ohun ini

Awọn ti pari ọja tihydroxypropyl methyl celluloseni a funfun lulú tabi funfun alaimuṣinṣin fibrous ri to, pẹlu kan patiku iwọn ran nipasẹ ohun 80 apapo sieve.Awọn ipin oriṣiriṣi ti methoxy ati akoonu hydroxypropyl ati iki ti ọja ti pari jẹ ki o jẹ ọpọlọpọ awọn oriṣiriṣi pẹlu awọn iyatọ ninu iṣẹ.O ni awọn abuda ti jijẹ tiotuka ninu omi tutu ati insoluble ninu omi gbigbona ti o jọra si methylcellulose, ati solubility rẹ ninu awọn olomi Organic ju ti omi lọ.O le jẹ tiotuka ninu kẹmika anhydrous ati ethanol, bakanna bi awọn hydrocarbons chlorinated gẹgẹbi dichloromethane, trichloroethane, ati awọn nkan ti o nfo Organic gẹgẹbi acetone, isopropanol, ati ọti diacetone.Nigbati o ba tuka ninu omi, o dapọ pẹlu awọn ohun elo omi lati ṣe colloid kan.O jẹ iduroṣinṣin si awọn acids ati awọn ipilẹ ati pe ko ni ipa laarin iwọn pH ti 2-12.Botilẹjẹpe hydroxypropyl methylcellulose kii ṣe majele, o jẹ flammable ati pe o le fesi ni agbara pẹlu awọn oxidants [5].

Awọn iki tiHPMC awọn ọjapọ si pẹlu ilosoke ti ifọkansi ati iwuwo molikula.Nigbati iwọn otutu ba ga, iki bẹrẹ lati kọ silẹ.Nigbati iwọn otutu ba de iwọn otutu kan, iki yoo dide lojiji ati gel waye.Awọn iwọn otutu jeli ti awọn ọja viscosity kekere jẹ ti o ga ju ti awọn ọja iki giga lọ.Ojutu olomi rẹ jẹ iduroṣinṣin ni iwọn otutu yara ati ni gbogbogbo ko ni ibajẹ ti iki ayafi fun ibajẹ enzymatic.O ni o ni pataki gbona gelling-ini, ti o dara film lara iṣẹ ati dada aṣayan iṣẹ-ṣiṣe.

Igbaradi

Lẹhin itọju cellulose pẹlu alkali, alkoxy anion ti ipilẹṣẹ nipasẹ hydroxyl deprotonation le ṣe afikun si propane epoxy lati ṣe ina.hydroxypropyl cellulose ether;O tun le ṣajọpọ pẹlu kiloraidi methyl lati gbe ether methyl cellulose jade.Nigbati awọn aati mejeeji ba waye ni akoko kanna,hydroxypropyl methyl celluloseti wa ni iṣelọpọ.

idi

Awọn lilo tihydroxypropyl methyl cellulosejẹ iru si miirancellulose ethers, Ni akọkọ ti a lo bi dispersant, oluranlowo idadoro, thickener, emulsifier, stabilizer, ati alemora ni orisirisi awọn aaye.O ga ju awọn ethers cellulose miiran ni awọn ofin ti solubility, dispersibility, akoyawo, ati resistance enzymu.

Ninu ounjẹ ati ile-iṣẹ elegbogi, a lo bi afikun.Nitori awọn ohun-ini alemora rẹ, awọn ohun-ini ti o ṣẹda fiimu, ti o nipọn ati pipinka ninu awọn olomi, bakanna bi agbara rẹ lati dena ilaluja epo ati ṣetọju ọrinrin, a lo bi alemora, nipọn, dispersant, olutura, imuduro, ati emulsifier.Ko ni eero, ko si iye ijẹẹmu, ko si si awọn iyipada ti iṣelọpọ.

Ni afikun,HPMCni o ni awọn ohun elo ni sintetiki resini polymerization aati, petrochemicals, seramiki, papermaking, alawọ, Kosimetik, aso, ohun elo ile, ati photosensitive titẹ sita farahan.