Hydroxypropyl methylcellulose (lebitso la INN: Hypromellulose), eo hape e khutsufalitsoeng e le hydroxypropyl methylcellulose (HPMC), ke mofuta oa li-ether tse tsoakiloeng tsa cellulose tse seng tsa ionic.

Hydroxypropyl methylcellulose(Lebitso la INN:Hypromellulose), e boetse e khutsufalitsoe e lehydroxypropyl methylcellulose (HPMC), ke mofuta o fapaneng wa di-ether tse tswakilweng tsa cellulose tse seng tsa ionic. Ke polymer e sa sebetseng hantle, e sa sebetseng, e nang le viscoelastic e sebediswang haholo e le setlolo sa mahlo, kapa e le setlatsetso kapa motswako meriana ya molomo, e fumanehang hangata mefuteng e fapaneng ya thepa.

Jwalo ka sehlomathiso sa dijo, hydroxypropyl methylcellulose e ka bapala mesebetsi e latelang: emulsifier, thickener, suspension agent, le sebaka sa gelatin ya diphoofolo. Khoutu ya yona ya Codex Alimentarius ke E464.

thepa ea lik'hemik'hale

Sehlahisoa se felileng sahydroxypropyl methyl celluloseke phofo e tšoeu kapa e tšoeu e tiileng e hlephileng, e nang le boholo ba karoloana e fetang ka sefeng sa letlooeng sa 80. Litekanyetso tse fapaneng tsa methoxy le hydroxypropyl le viscosity ea sehlahisoa se felileng li etsa hore e be mefuta e fapaneng e nang le phapang ea ts'ebetso. E na le litšobotsi tsa ho qhibiliha ka metsing a batang le ho se qhibilihe ka metsing a chesang joalo ka methylcellulose, 'me ho qhibiliha ha eona ka har'a li-solvent tsa tlhaho ho feta tsa metsi. E ka qhibiliha ka har'a methanol le ethanol e sa nang le metsi, hammoho le li-hydrocarbon tse nang le chlorine tse kang dichloromethane, trichloroethane, le li-solvent tsa tlhaho tse kang acetone, isopropanol, le diacetone alcohol. Ha e qhibilihisoa ka metsing, e kopana le limolek'hule tsa metsi ho etsa colloid. E tsitsitse ho li-acid le metheo 'me ha e amehe ka har'a pH ea 2-12. Le hoja hydroxypropyl methylcellulose e se chefo, e ka tuka 'me e ka arabela ka matla ka li-oxidants [5].

Ho teteana haLihlahisoa tsa HPMCe eketseha ka keketseho ea mahloriso le boima ba limolek'hule. Ha mocheso o phahama, viscosity e qala ho fokotseha. Ha mocheso o fihla mochesong o itseng, viscosity e phahama ka tšohanyetso 'me gel e hlaha. Mocheso oa gel oa lihlahisoa tse nang le viscosity e tlase o phahame ho feta oa lihlahisoa tse nang le viscosity e phahameng. Tharollo ea eona ea metsi e tsitsitse mochesong oa kamore 'me ka kakaretso ha e na ho senyeha ha viscosity ntle le ho senyeha ha enzymatic. E na le thepa e ikhethang ea gelling ea mocheso, ts'ebetso e ntle ea ho etsa filimi le ts'ebetso ea bokaholimo.

Litokisetso

Kamora hore cellulose e phekoloe ka alkali, anion ea alkoxy e hlahisoang ke hydroxyl deprotonation e ka eketsoa ho epoxy propane ho hlahisaether ea hydroxypropyl celluloseE ka boela ea kopana le methyl chloride ho hlahisa methyl cellulose ether. Ha likarabelo tsena ka bobeli li etsahala ka nako e le 'ngoe,hydroxypropyl methyl cellulosee hlahisoa.

morero

Tšebeliso eahydroxypropyl methyl cellulosee tšoana le tse lingli-ether tsa selulose, e sebediswa haholoholo e le seqhalanyi, sethibela-ho emisoa, sethibela-ho teteana, sehlahiswa sa ho tsitsisa, le sekgomaretsi mafapheng a fapaneng. E phahametse di-ether tse ding tsa cellulose mabapi le ho qhibiliha, ho qhalana, ponaletso le ho hanyetsa dienzyme.

Indastering ea lijo le meriana, e sebelisoa e le sehlomathiso. Ka lebaka la litšobotsi tsa eona tsa ho khomarela, litšobotsi tsa ho etsa filimi, ho teteana le ho hasana ka har'a metsi, hammoho le bokhoni ba eona ba ho thibela ho kenella ha oli le ho boloka mongobo, e sebelisoa e le sekhomaretsi, se matlafatsang, se qhalakanyang, se kokobetsang, se tiisang, le se emulsifier. Ha e na chefo, ha e na boleng ba phepo, 'me ha e na liphetoho tsa metabolism.

Holim'a moo,HPMCE na le lits'ebeliso liketsong tsa polymerization ea resin ea maiketsetso, lik'hemik'hale tsa petrochemical, liseramiki, ho etsa pampiri, letlalo, litlolo, liphahlo, thepa ea kaho le lipoleiti tsa khatiso tse utloang khanya.