Mokhoa oa ho khetha hydroxypropyl methylcellulose?

Phapano ke efe pakeng tsahydroxypropyl methylcellulose(HPMC) ka kapa ntle le S?

1. HPMC e arotsoe ka mofuta oa hang-hang le mofuta oa ho hasana ka potlako

Mofuta oa ho qhala ka potlako oa HPMC o kenngoa ka tlhaku S. Nakong ea ts'ebetso ea tlhahiso, glyoxal e lokela ho ekeletsoa.

Mofuta oa hang-hang oa HPMC ha o kenye litlhaku, joalo ka "100000" ke "100000 viscosity fast dispersion type HPMC".

2. Ka kapa ntle le S, litšobotsi li fapane

Ka potlako HPMC e qhalakana ka potlako metsing a batang ebe e nyamela ka metsing. Ka nako ena, mokelikeli ha o na viscosity, hobane HPMC e qhalakanngoa feela metsing, 'me ha ho na ho qhibiliha ha sebele. Ka mor'a metsotso e ka bang peli, viscosity ea mokelikeli e ntse e eketseha butle-butle, e etsa mokelikeli o khomarelang o bonaletsang. Colloid e teteaneng.

Instant HPMC e ka hasana ka potlako metsing a chesang a ka bang 70°C. Ha mocheso o theohela mocheso o itseng, viscosity e bonahala butle-butle ho fihlela ho thehoa li-viscous colloid tse hlakileng.

3. Ka kapa ntle le S, morero o fapane

Instant HPMC e ka sebelisoa feela ka putty powder le seretse. Likhomaretsing tsa metsi, liphahlo le lisebelisoa tsa ho hloekisa, ho tla ba teng 'me ho ke ke ha sebelisoa.

Ho qhalakanya ka potlako HPMC e na le mefuta e mengata ea lits'ebetso. E ka sebelisoa ka phofo ea putty, seretse, sekhomaretsi sa metsi, pente le lihlahisoa tsa ho hlatsoa ntle le li-contraindications.

Mokhoa oa ho qhala

1. Nka palo e hlokahalang ea metsi a chesang, e behe ka har'a setshelo 'me ue chese ka holimo ho 80 ° C,' me butle-butle u kenye sehlahisoa sena tlas'a ho sisinyeha butle-butle. Selulose e phaphamala ka holim'a metsi qalong, empa butle-butle e qhalakanngoa ho etsa seretse se tšoanang. Folisa tharollo ka ho hlohlelletsa.

2. Kapa futhumatsa 1/3 kapa 2/3 ea metsi a chesang ho feta 85 ° C, eketsa selulose ho fumana slurry ea metsi a chesang, ebe u eketsa palo e setseng ea metsi a batang, tsoela pele ho hlohlelletsa, 'me u pholile motsoako o hlahisoang.

3. Cellulose e na le palo e batlang e le ntle, 'me e teng e le karoloana e le' ngoe e nyenyane ka har'a phofo e ts'oaroang ka mokhoa o ts'oanang, 'me e qhibiliha ka potlako ha e kopana le metsi ho etsa viscosity e hlokahalang.

4. Eketsa selulose butle-butle le ka mokhoa o ts'oanang mocheso oa motsoako, 'me u tsoele pele ho hlohlelletsa nakong ea ho eketsa ho fihlela ho etsoa tharollo e hlakileng.

Ke lintlha life tse amang ho bolokoa ha metsi a hydroxypropyl methylcellulose?

Ho boloka metsi a hydroxypropyl methylcellulose HPMC sehlahisoa ka bosona hangata ho angoa ke lintlha tse latelang:

1. Cellulose ether HPMC homogeneity

HPMC e sebetsanang ka mokhoa o ts'oanang e na le kabo e tšoanang ea lihlopha tsa methoxy le hydroxypropoxy le ho boloka metsi a phahameng.

2. Cellulose ether HPMC mocheso oa mocheso oa gel

Ha mocheso oa gel o futhumatsang o phahame, sekhahla sa ho boloka metsi se phahame; ho seng joalo, sekhahla sa ho boloka metsi se ka tlase.

3. Cellulose ether HPMC viscosity

Ha viscosity ea HPMC e eketseha, tekanyo ea ho boloka metsi e boetse e eketseha; ha viscosity e fihla boemong bo itseng, ho eketseha ha sekhahla sa ho boloka metsi ho atisa ho ba bonolo.

Cellulose ether HPMC palo ea tlatsetso

Ha palo e ekelitsoeng ea cellulose ether HPMC e le kholoanyane, e phahamisa sekhahla sa ho boloka metsi le phello e ntle ea ho boloka metsi.

Boemong ba 0.25-0.6%, tekanyo ea ho boloka metsi e eketseha ka potlako ka keketseho ea palo ea ho eketsa; ha palo ea tlatsetso e ntse e eketseha, mokhoa o ntseng o eketseha oa sekhahla sa ho boloka metsi o ea butle.


Nako ea poso: Oct-17-2022