Hydroxypropyl methylcellulose (Izina rya INN: Hypromellose), nayo yoroshye nka hypromellose (hydroxypropyl methylcellulose, mu magambo ahinnye nkaHPMC), ni ubwoko butandukanye bwa selile butavanze ethers. Nibice bya sintetike, idakora, viscoelastic polymer ikunze gukoreshwa nkamavuta yo kuvura amaso, cyangwa nkibintu byoroshye cyangwa byoroshye muri farumasi yiminwa, kandi bikunze kuboneka mubicuruzwa bitandukanye byubucuruzi.
Nkinyongera yibiribwa, hypromellose irashobora gukina inshingano zikurikira: emulisiferi, kubyimbye, guhagarika imiti no gusimbuza gelatine yinyamaswa. Kode yayo (E-code) muri Codex Alimentarius ni E464.
Ibikoresho bya shimi:
Igicuruzwa cyarangiye cyahydroxypropyl methylcelluloseni ifu yera cyangwa yera yera fibrous ikomeye, kandi ingano yingirakamaro inyura mumashanyarazi ya mesh 80. Ikigereranyo cyibintu bya metoxyl hamwe na hydroxypropyl yibicuruzwa byarangiye biratandukanye, kandi viscosity iratandukanye, bityo ihinduka ubwoko butandukanye nibikorwa bitandukanye. Ifite ibiranga gushonga mumazi akonje no kudashonga mumazi ashyushye asa na methyl selulose, kandi gukomera kwayo mumashanyarazi arenze ayo mumazi. Irashobora gushonga muri methanol ya anhydrous na Ethanol, kandi irashobora no gushonga muri hydrocarbone ya chlorine nka dichloro methane, trichloroethane, hamwe na solge organique nka acetone, isopropanol, na alcool ya diacetone. Iyo bishonge mumazi, bizahuza na molekile zamazi kugirango bibe colloid. Irahamye kuri aside na alkali, kandi ntabwo igira ingaruka murwego rwa pH = 2 ~ 12. Hypromellose, nubwo idafite uburozi, irashya kandi ikora cyane hamwe na okiside.
Ubukonje bwibicuruzwa bya HPMC bwiyongera hamwe no kwiyongera kwuburemere nuburemere bwa molekile, kandi iyo ubushyuhe buzamutse, ububobere bwabwo butangira kugabanuka. Iyo igeze ku bushyuhe runaka, ubukonje burazamuka gitunguranye kandi gelation ibaho. uburebure bwa. Igisubizo cyacyo cyamazi gihamye mubushyuhe bwicyumba, usibye ko gishobora guteshwa agaciro na enzymes, kandi ubukonje bwacyo muri rusange nta kintu cyangirika. Ifite imiterere yihariye yubushyuhe, ibintu byiza byerekana firime nibikorwa byubuso.
Gukora:
Iyo selile imaze kuvurwa na alkali, anion ya alkoxy iterwa na deprotonation yitsinda rya hydroxyl irashobora kongeramo okiside ya propylene kugirango itange hydroxypropyl selulose ether; irashobora kandi guhurirana na methyl chloride kugirango itange methyl selulose ether. Hydroxypropyl methylcellulose ikorwa mugihe ibisubizo byombi bikorerwa icyarimwe.
Gukoresha:
Imikoreshereze ya hydroxypropyl methylcellulose isa niy'izindi selile. Ikoreshwa cyane cyane nko gutatanya, guhagarika ibikorwa, kubyimbye, emulifier, stabilisateur no gufatira mubice bitandukanye. Iraruta izindi selile ya selile muburyo bwo gukemuka, gutatanya, gukorera mu mucyo no kurwanya enzyme.
Mu nganda z’ibiribwa n’imiti, ikoreshwa nk'inyongera. Ikoreshwa nk'ifata, ikabyimbye, ikwirakwiza, Emollient, stabilisateur na emulifier. Ntabwo ifite uburozi, nta gaciro kintungamubiri, kandi nta mpinduka ihinduka.
Byongeye,HPMCifite porogaramu muri sintetike ya resin polymerisiyonike, peteroli-chimique, ububumbyi, gukora impapuro, uruhu, kwisiga, gutwikira, ibikoresho byubaka hamwe nicyapa cyandika.
Igihe cyo kohereza: Apr-25-2024