Mekhoa ea ho qhaqha ea HPMC e kenyelletsa: mokhoa oa tharollo ea hang-hang ea metsi a batang le mokhoa oa tharollo e chesang, mokhoa oa ho kopanya phofo le mokhoa oa ho kolobisa tharollo ea tlhaho.
Tharollo ea metsi a batang ea HPMC e phekoloa ka glyoxal, e hasanngoang ka potlako metsing a batang. Nakong ena, ha se tharollo ea 'nete. Ke tharollo ha viscosity e eketseha. Tharollo e chesang ha e phekoloe ka glyoxal. Ha bophahamo ba glyoxal bo le boholo, bo tla hasana ka potlako, empa viscosity e tla nyoloha butle.
Kaha HPMC ha e qhibilihe metsing a chesang, HPMC e ka hasana ka ho lekana metsing a chesang mohatong oa pele, ebe e qhibiliha kapele ha e pholisitsoe.
Mekhoa e 'meli e tloaelehileng e hlalositsoe ka tlase:
1) Kenya metsi a chesang a hlokahalang ka setshelong 'me u a futhumatse ho fihlela ho 70 ℃. Hydroxypropyl methylcellulose e ile ea eketsoa butle-butle tlas'a ho hlohlelletsa butle, HPMC ea qala ho phaphamala holim'a metsi, 'me butle-butle ea theha slurry, e ileng ea pholisoa tlas'a ho hlohlelletsa.
2) Kenya 1/3 kapa 2/3 ea metsi a hlokahalang ka setshelong, futhumatsa ho fihlela ho 70 ℃, hasanya HPMC ho latela mokhoa oa 1) ho lokisa slurry ea metsi a chesang; Ebe u eketsa metsi a batang a setseng ho slurry ea metsi a chesang, u hlohlelletse 'me u pholise motsoako.
HPMC ea metsi a batang hang-hang e ka qhibilihisoa ka ho eketsa metsi ka kotloloho, empa nako ea pele ea ho teteana ke metsotso e 1 ho isa ho e 15. Nako ea ts'ebetso ha ea lokela ho feta nako ea ho qala.
Mokhoa oa ho kopanya phofo: Phofo ea HPMC e qhalanngoa ka botlalo ka ho kopanya ka omileng le likarolo tse tšoanang tsa phofo, ebe e qhalanngoa ka metsi. Tabeng ena, HPMC e ka qhalanngoa ntle le ho e koahela.
Mokhoa oa ho kolobisa metsoako ea tlhaho:
Hydroxypropyl methylcellulose e ka qhibilihisoa ka ho e qhalanya ka har'a organic solvent kapa ho e kolobisa ka organic solvent, ebe e e eketsa metsing a batang kapa metsing a batang. Ethanol, ethylene glycol, jj. li ka sebelisoa e le organic solvent.
Nako ea poso: Pherekhong-20-2022