Na ua tseba ka hypromellose?

Hydroxypropyl methylcellulose (lebitso la INN: Hypromellose), hape e nolofalitsoeng joalo ka hypromellose (hydroxypropyl methylcellulose, e khutsufalitsoeng e le HPMC), ke mefuta e fapaneng ea li-ether tse tsoakiloeng tsa nonionic cellulose.Ke semi-synthetic, e sa sebetseng, viscoelastic polymer e atisang ho sebelisoa e le setlolo sa ophthalmology, kapa e le ntho e thusang kapa e thusang litlhare tsa molomo, 'me hangata e fumanoa lihlahisoa tse fapaneng tsa khoebo.

E le tlatsetso ea lijo, hypromellose e ka bapala likarolo tse latelang: emulsifier, thickener, suspending agent le sebaka sa gelatin ea liphoofolo.Khoutu ea eona (E-code) ho Codex Alimentarius ke E464.

Lintho tsa lik'hemik'hale:

Sehlahisoa se feliloeng sa hydroxypropyl methylcellulose ke phofo e tšoeu kapa e tšoeu e hlephileng e tiileng, 'me boholo ba karoloana bo feta ka har'a sieve ea 80-mesh.Karolelano ea litaba tsa methoxyl ho hydroxypropyl ea sehlahisoa se felileng e fapane, 'me viscosity e fapane, kahoo e fetoha mefuta e sa tšoaneng e nang le mekhoa e fapaneng.E na le litšoaneleho tsa ho qhibiliha metsing a batang le ho se qhibilihe metsing a chesang a tšoanang le methyl cellulose, 'me ho qhibiliha ha eona ka har'a lihlahisoa tsa tlhaho ho feta metsi.E ka qhibiliha ka methanol ea anhydrous le ethanol, hape e ka qhibiliha ka li-hydrocarbon tse chlorinated tse kang dichloro methane, trichloroethane, le metsoako ea tlhaho e kang acetone, isopropanol le diacetone joala.Ha e qhibiliha ka metsing, e tla kopana le limolek'hule tsa metsi ho etsa colloid.E tsitsitse ho acid le alkali, 'me ha e amehe ka mefuta e fapaneng ea pH = 2 ~ 12.Hypromellose, le hoja e se chefo, e ka tuka 'me e sebetsa ka mabifi ha e na le li-oxidizing agents.

Viscosity ea lihlahisoa tsa HPMC e eketseha ka ho eketseha ha mahloriso le boima ba limolek'hule, 'me ha mocheso o phahama, viscosity ea eona e qala ho fokotseha.Ha e fihla mocheso o itseng, viscosity e phahama ka tšohanyetso 'me gelation e etsahala.bophahamo ba.Tharollo ea eona ea metsi e tsitsitse mocheso oa kamore, ntle le hore e ka senyeha ka li-enzyme, 'me viscosity ea eona e akaretsang ha e na ts'ebetso ea ho senyeha.E na le thepa e khethehileng ea gelation ea mocheso, thepa e ntle ea ho etsa filimi le mosebetsi oa holim'a metsi.

Ho etsa:

Ka mor'a hore cellulose e phekoloe ka alkali, alkoxy anion e hlahisoang ke ho senyeha ha sehlopha sa hydroxyl e ka eketsa propylene oxide ho hlahisa hydroxypropyl cellulose ether;e ka boela ea kopana le methyl chloride ho hlahisa methyl cellulose ether.Hydroxypropyl methylcellulose e hlahisoa ha karabelo ka bobeli e etsoa ka nako e le 'ngoe.

Sebelisa:

Tšebeliso ea hydroxypropyl methylcellulose e tšoana le ea li-cellulose ethers tse ling.Haholo-holo e sebelisoa e le dispersant, suspending agent, thickener, emulsifier, stabilizer le sekhomaretsi masimong a sa tšoaneng.E phahametse tse ling tsa cellulose ethers mabapi le ho solubility, dispersibility, pepeneneng le ho hanyetsa li-enzyme.

Ka indasteri ea lijo le ea meriana, e sebelisoa e le tlatsetso.E sebelisoa e le sekhomaretsi, thickener, dispersant, Emollient, stabilizer le emulsifier.Ha e na chefo, ha e na boleng ba phepo e nepahetseng, ebile ha e na liphetoho tsa metabolic.

Ntle le moo, HPMC e na le lits'ebetso ho polymerization ea resin ea maiketsetso, lik'hemik'hale tsa petrochemical, ceramics, papermaking, letlalo, litlolo, liphahlo, thepa ea moaho le lipoleiti tsa khatiso tse nkang lifoto.