Hydroxypropyl methylcellulose (HPMC) ipolymer inoshandiswa zvakasiyana-siyana uye inoshandiswa zvakanyanya mumaindasitiri akasiyana-siyana, inozivikanwa nehunyanzvi hwayo hwakasiyana uye mashandisirwo ayo. Musanganiswa uyu unobva ku cellulose, polymer yechisikigo inowanikwa mumadziro emasero emiti. Kuti unzwisise kuumbwa kwehydroxypropylmethylcellulose, zvakakosha kuti uongorore chimiro uye kugadzirwa kwe cellulose derivative iyi.
Maumbirwo e cellulose:
Cellulose ikabhohaidhiretsi yakaoma ine cheni yakatsetseka yemayuniti eβ-D-glucose akabatanidzwa nezvisungo zveβ-1,4-glycosidic. Maketani aya eglucose anobatanidzwa pamwe chete nezvisungo zvehydrogen kuti agadzire chimiro chakatsetseka chakasimba. Cellulose ndiyo chikamu chikuru chemadziro emasero emiti, ichipa simba uye kuomarara kumasero emiti.
Zvinobva kuHydroxypropyl Methylcellulose:
Hydroxypropyl methylcellulose inogadzirwa nekushandisa makemikari kugadzirisa cellulose uye kuisa hydroxypropyl ne methyl groups muketani huru ye cellulose. Kugadzirwa kunowanzo sanganisira matanho anotevera:
Kuita kweEtherification:
Methylation: Kurapa cellulose nealkaline solution uye methyl chloride kuti uunze methyl groups (-CH3) mu hydroxyl groups (-OH) ye cellulose.
Hydroxypropylation: Methylated cellulose inopindirana zvakare nepropylene oxide kuti iunze mapoka ehydroxypropyl (-CH2CHOHCH3) muchimiro checellulose. Maitiro aya anowedzera kunyungudika kwemvura uye anochinja hunhu hwemuviri hwecellulose.
kunatswa:
Cellulose yakagadziriswa inozocheneswa kuti ibvise chero zvinhu zvisina kugadziriswa, zvimwe zvinhu kana tsvina.
Kuomesa nekukuya:
Hydroxypropyl methylcellulose yakacheneswa inoomeswa yogayiwa kuita upfu hwakatsetseka hwakagadzirirwa kushandiswa mumhando dzakasiyana-siyana.
Zvinhu zviri muHydroxypropyl Methylcellulose:
Kuumbwa kwehydroxypropyl methylcellulose kunoratidzwa nedanho rekutsiva, iro rinoreva mwero wekuti mapoka ehydroxypropyl nemethyl anotsiva mapoka ehydroxyl mucheni yecellulose. Magiredhi akasiyana eHPMC ane mwero wakasiyana wekutsiva, zvichikanganisa kunyungudika kwawo, viscosity nezvimwe zvinhu.
Fomura yemakemikari yehydroxypropyl methylcellulose inogona kuratidzwa se (C6H7O2(OH)3-mn(OCH3)m(OCH2CH(OH)CH3)n)_x, apo m na n vanomiririra mwero wekutsiva.
m: dhigirii remethylation (mapoka emethyl pachikamu chimwe nechimwe cheglucose)
n: dhigirii rehydroxypropylation (mapoka ehydroxypropyl pachikamu cheglucose)
x: huwandu hwemayuniti eglucose mucheni yecellulose
Zvimiro uye Mashandisirwo:
Kunyungudika: HPMC inonyungudika mumvura, uye mwero wekuitsiva unokanganisa hunhu hwayo hwekunyungudika. Inogadzira mhinduro yakajeka uye yakamanikana mumvura, zvichiita kuti ikwanise kushandiswa mumhando dzakasiyana-siyana dzemishonga.
Kusviba: Kusviba kwemushonga weHPMC kunoenderana nezvinhu zvakaita sehuremu hwemamorekuru uye mwero wekutsiva. Hunhu uhwu hwakakosha pakushandiswa kwakadai semishonga inoda mishonga inodzorwa.
Kugadzirwa Kwemafirimu: HPMC inogona kugadzira mafirita matete sezvo mvura yacho yaoma, zvichiita kuti ishande mukugadzira machira mumaindasitiri emishonga, ezvekudya nedzimwe nzvimbo.
Zvinosimbisa uye Zvinoita Kuti Zvive Zvine Simba: Muindasitiri yezvikafu, HPMC inoshandiswa sechinhu chinosimbisa uye chinosimbisa muzvigadzirwa zvakasiyana-siyana, zvinosanganisira masosi, madhizeti, nezvinhu zvakabikwa.
Mashandisirwo Emishonga: HPMC inoshandiswa zvakanyanya mumishonga, kusanganisira mapiritsi, makapisiri, uye mhinduro dzemaziso, nekuda kwehunhu hwayo hwekuburitsa hunhu uye kubatana kwayo mumuviri.
Kuvaka uye machira ekudzivirira: HPMC inoshandiswa muzvinhu zvekuvaka zvakaita semadhaka, matiles anonamira uye maplaster. Inoshandiswawo sechinosimbisa uye chinosimbisa mukupenda uye machira ekudzivirira.
Zvigadzirwa Zvekuchengetedza Munhu: Muindasitiri yezvizoro nekuchengetedza munhu, HPMC inowanikwa muzvigadzirwa zvakaita semakirimu, mafuta ekuchenesa uye shampoo, uko inopa magadzirirwo uye kugadzikana.
Hydroxypropyl methylcellulose inowanikwa kuburikidza nemethylation uye hydroxypropylation ye cellulose. Ipolymer ine mabasa akawanda ine mashandisirwo akasiyana-siyana. Hunhu hwayo hwakasiyana hunoita kuti ive yakakosha mumaindasitiri akadai semishonga, chikafu, kuvaka uye kutarisira munhu. Kugadziriswa kwe cellulose kwakadzorwa kunogona kugadzirisa hunhu hweHPMC, zvichiita kuti ive chinhu chakakosha chezvinhu zvakawanda zvatinosangana nazvo muhupenyu hwedu hwezuva nezuva.
Nguva yekutumira: Ndira-10-2024