▲I-Hydroxypropyl methyl cellulose (HPMC)iyimpuphu emhlophe engenaphunga, engenambitheki, engenabuthi. Ngemva kokuncibilika ngokuphelele emanzini, i-hydroxypropyl methyl cellulose izokwakha i-colloid ecacile neqinile.
▲ Izinto zokusetshenziswa eziyinhloko ze-hydroxypropyl methyl cellulose (HPMC): ukotini ocolisisiwe, i-methyl chloride, i-propylene oxide, nezinye izinto zokusetshenziswa, i-caustic soda, i-acid, i-toluene, i-isopropanol, njll.
Ukuqhathaniswa kwezinzuzo kanye nokungalungi kwe-hydroxypropyl methyl cellulose:
1. I-HPMC emsulwa ye-hydroxypropyl methyl cellulose ikhululekile ngokubona futhi inobukhulu obuncane, enesilinganiso esingu-0.3–0.4/ml.
I-HPMC exubile inoketshezi oluhle kakhulu futhi izwakala inzima, okuhluke kakhulu kumkhiqizo wangempela ngokubukeka.
2. Isixazululo samanzi se-hydroxypropyl methyl cellulose esimsulwa se-HPMC sicacile, sidlulisa ukukhanya okuphezulu, izinga lokugcina amanzi > 97%.
Isixazululo samanzi se-HPMC esixutshwe kahle singcolile, futhi izinga lokugcina amanzi kunzima ukulifinyelela ku-80%.
3. I-HPMC emsulwa akufanele inuke i-ammonia, isitashi kanye notshwala.
I-HPMC exubile ivame ukunuka zonke izinhlobo zokunambitheka, noma ngabe ayinambitheki, izozwakala inzima.
4. Impuphu ye-HPMC emsulwa ye-hydroxypropyl methyl cellulose inomcubu ngaphansi kwe-microscope noma ingilazi yokukhulisa.
I-HPMC exubile ingabonakala njengezinto eziqinile noma amakristalu ahlanganisiwe ngaphansi kwesibonakhulu noma ingilazi yokukhulisa.
Yiziphi izici zokuhlonza izinzuzo kanye nokungalungi kwe-hydroxypropyl methyl cellulose?
1. izinga elimhlophe
Nakuba ubumhlophe bungenakunquma ukuthi i-HPMC kulula ukuyisebenzisa, futhi uma kungezwa izinto zokwenza mhlophe ngesikhathi senqubo yokukhiqiza, kuzothinta ikhwalithi yayo. Kodwa-ke, imikhiqizo eminingi emihle inobumhlophe obuhle.
2. Ubunono
Ubucwebe be-HPMC ngokuvamile bune-mesh engu-80 kanye ne-mesh engu-100, futhi uma ubucwebe bucwebe kakhulu, ngokuvamile, kungcono.
3. Ukudluliselwa
Bekai-hydroxypropyl methyl cellulose (HPMC)emanzini ukuze kwakheke i-colloid esobala, bese uhlola ukuhanjiswa kwayo kokukhanya. Uma ukuhanjiswa kokukhanya kuphakeme, kungcono, okubonisa ukuthi kunezinto ezingancibiliki kakhulu kuwo. Ukungena kwama-reactor aqondile ngokuvamile kuhle, kanti okwama-reactor avundlile kubi kakhulu.
4. Isilinganiso
Uma amandla adonsela phansi athile emakhulu, kulapho esinda khona. Ukucaciswa kukhulu, ngokuvamile ngoba okuqukethwe yiqembu le-hydroxypropyl elikuyo kuphakeme, kanti okuqukethwe yiqembu le-hydroxypropyl kuphakeme, ukugcinwa kwamanzi kungcono.
Isikhathi sokuthunyelwe: Ephreli-25-2024