▲IHydroxypropyl methyl cellulose (HPMC)iyimpushana emhlophe engenaphunga, ayinambitheki, engenabuthi. Ngemva kokuncibilika ngokuphelele emanzini, i-hydroxypropyl methyl cellulose izokwakha i-viscous colloid esobala.
▲ Izinto zokusetshenziswa eziyinhloko ze-hydroxypropyl methyl cellulose (HPMC): ukotini ocolisisiwe, i-methyl chloride, i-propylene oxide, nezinye izinto zokusetshenziswa, i-caustic soda, i-asidi, i-toluene, i-isopropanol, njll.
Ukuqhathaniswa kwezinzuzo kanye nokubi kwe-hydroxypropyl methyl cellulose:
1.I-Hydroxypropyl methyl cellulose ehlanzekile I-HPMC ikhululekile ngokubukeka futhi inomthamo omncane wenqwaba, enesilinganiso esingu-0.3–0.4/ml.
I-HPMC ehlanganisiwe inoketshezi oluhle kakhulu futhi izwakala isinda kakhulu, ehluke kakhulu kumkhiqizo wangempela ngokubukeka.
2.I-hydroxypropyl methyl cellulose ehlanzekile Isixazululo samanzi se-HPMC sicacile, sidlulisa ukukhanya okuphezulu, izinga lokugcinwa kwamanzi > 97%.
Isixazululo samanzi se-HPMC esihlanganisiwe singcolile, futhi izinga lokugcinwa kwamanzi linzima ukufinyelela ku-80%.
3.I-HPMC ehlanzekile akufanele ihogele i-ammonia, isitashi notshwala.
I-HPMC egugile ngokuvamile ingahogela zonke izinhlobo zokunambitheka, ngisho noma ingenambitheki, izozwakala isindayo.
I-4.I-hydroxypropyl methyl cellulose ehlanzekile ye-HPMC powder i-fibrous ngaphansi kwe-microscope noma ingilazi yokukhulisa.
I-HPMC egugile ingabonwa njengokuqinile okuyimbudumbudu noma amakristalu ngaphansi kwesibonakhulu noma ingilazi yokukhulisa.
Kusuka kuziphi izici zokuhlonza okuhle nokubi kwe-hydroxypropyl methyl cellulose?
1.iziqu ezimhlophe
Nakuba ubumhlophe bungakwazi ukucacisa ukuthi i-HPMC kulula yini ukuyisebenzisa, futhi uma ama-ejenti amhlophe engezwa phakathi nenqubo yokukhiqiza, izothinta ikhwalithi yayo. Nokho, iningi lemikhiqizo emihle inobumhlophe obuhle.
2.Ukulunga
Ubucwebe be-HPMC ngokuvamile buba ne-mesh engu-80 kanye ne-100 mesh, futhi ukucoleka, ukukhuluma ngokuvamile, kungcono.
3.Ukudlulisa
Bekai-hydroxypropyl methyl cellulose (HPMC)emanzini ukwenza i-colloid ebonakalayo, futhi uhlole ukudluliswa kwayo kokukhanya. Ukuphakama kokudlulisa ukukhanya, kungcono, okubonisa ukuthi kunezinto ezincane ezingancibiliki kuyo. Ukungeneka kwama-reactor aqondile ngokuvamile kuhle, kuyilapho lokho kwama-reactor avundlile kubi kakhulu.
4.Isilinganiso
Uma kukhulu amandla adonsela phansi athile, kuyasinda kuba ngcono. Ukucaciswa kukhulu, ngokuvamile ngenxa yokuthi okuqukethwe kweqembu le-hydroxypropyl kulo kuphezulu, futhi okuqukethwe kweqembu le-hydroxypropyl kuphezulu, ukugcinwa kwamanzi kungcono.
Isikhathi sokuthumela: Apr-25-2024