▲Hydroxypropyl methyl cellulose (HPMC)ke phofo e tšoeu e se nang monko, e se nang tatso, e se nang chefo. Ka mora ho qhibiliha ka botlalo ka metsing, hydroxypropyl methyl cellulose e tla etsa colloid e bonaletsang e nang le viscous.
▲ Lisebelisoa tse ka sehloohong tse tala tsa hydroxypropyl methyl cellulose (HPMC): k'hothone e hloekisitsoeng, methyl chloride, propylene oxide, le lisebelisoa tse ling tse tala, caustic soda, asiti, toluene, isopropanol, jj.
Papiso ea melemo le mathata a hydroxypropyl methyl cellulose:
1. Hydroxypropyl methyl cellulose e hloekileng HPMC e hlephileng ka pono mme e na le bongata bo bonyenyane, ka sekala sa 0.3–0.4/ml.
HPMC e senyehileng e na le mokelikeli o motle haholo 'me e ikutloa e le boima, e leng se fapaneng haholo le sehlahisoa sa 'nete ka ponahalo.
2. Tharollo e hloekileng ea hydroxypropyl methyl cellulose ea HPMC e hlakile, e fetisa leseli haholo, sekhahla sa ho boloka metsi > 97%.
Tharollo ea metsi ea HPMC e silafalitsoeng e litšila haholo, 'me sekhahla sa ho boloka metsi se thata ho fihla ho 80%.
3. HPMC e hloekileng ha ea lokela ho nkha ammonia, starch le alcohols.
HPMC e senyehileng hangata e ka fofonela mefuta eohle ea litatso, leha e se na tatso, e tla ikutloa e le boima.
4. Phofo ea HPMC e hloekileng ea hydroxypropyl methyl cellulose e na le likhoele tlas'a microscope kapa khalase e holisang.
HPMC e senyehileng e ka bonoa e le lintho tse tiileng tse nang le granular kapa likristale tlas'a microscope kapa khalase e holisang.
Ho tsoa likarolong life ho khetholla melemo le mathata a hydroxypropyl methyl cellulose?
1. tekanyo e tšoeu
Leha bosweu bo ke ke ba tseba hore na HPMC e bonolo ho e sebedisa, mme haeba ho eketswa di-agent tsa ho sweufatsa nakong ya tshebetso ya tlhahiso, e tla ama boleng ba yona. Leha ho le jwalo, boholo ba dihlahiswa tse ntle di na le bosweu bo botle.
2. Botle
Botenya ba HPMC ka kakaretso bo na le letlooeng la 80 le letlooeng la 100, 'me ha botenya bo le botenya, ka kakaretso, bo molemo.
3. Phetisetso
Behahydroxypropyl methyl cellulose (HPMC)ka metsing ho etsa colloid e bonaletsang, le ho hlahloba phetiso ea eona ea leseli. Ha phetiso ea leseli e le holimo, ho molemo, ho bontša hore ho na le lintho tse sa qhibiliheng ho eona. Ho kenella ha li-reactor tse otlolohileng ka kakaretso ho hotle, ha ha li-reactor tse otlolohileng li le mpe le ho feta.
4. Tekanyo
Ha matla a khoheli a itseng a le maholo, boima ba ’ona bo ba betere. Boleng ba ’ona bo boholo, ka kakaretso hobane bokahare ba sehlopha sa hydroxypropyl ho sona bo phahame, ’me bokahare ba sehlopha sa hydroxypropyl bo phahame, ho boloka metsi ho ba betere.
Nako ea poso: Mmesa-25-2024