Hydroxypropypropypropinyl Methylcelll. Lisebelisoa tse tala tse sebelisitsoeng tlhahisong ea HPMC li tsoa lisebelisoa tsa tlhaho le tse nchafatsoang.
HPMC ke moitlami oa semisynthetic ea selefounu, polymer ea tlhaho e fumanehang marakong a lifofane ea lema. Lisebelisoa tse tala tse hlahisoang ke HPMC li kenyelletsa cellulose le Oxide ea Oxide. Lisebelisoa tse tala le tsa Syntmosis li hlalositsoe ka lintlha tse mabapi le:
1. Cellulose:
Mohloli: Lisebelisoa tse ka sehloohong tsa HPMC ke Cellulose, e nkiloeng ho tsoa ho pulp ea lehong kapa fiber ea k'hothone. Pulula ea lehong ke mohloli o atileng haholo ka lebaka la bongata ba eona le katleho e theko e boima.
Karohano: Ho arola selefounu ho tsoa ka lisebelisoa tse tala tse sebelisang lits'ebetso tse fapaneng tsa lik'hemik'hale le tsa mochini. Pulula ea lehong e phekoloa ho tlosa litšila le likhoele tse eketsehileng tsa celbulose.
2. Aplene Oxide:
Mohloli: Boikhethelo ba Poputse e le karolo ea bohlokoa ea Syntthetic HPMC e tsoang ho proflearne, petrochemical e fumanoeng nakong ea bosesaane e hloekisitsoeng.
Tlhahiso: Ts'ebetsong ena, propylene e arabela ka chlorine kapa hydrogen peroxide ho theha Power Oxide.
3. Karabelo ea Methylation:
Boletion: Synthes ea HPMC e kenyelletsa phallo ea cellulose ea celloulese ea nang le Power Oxide. Ts'ebetso ena e boetse e bitsoa ka methylation, eo ka lihlopha tsa hydroxypropyl li kentsoeng ka har'a li-silelose morao.
Phekolo ea Alkali: ho phekola Cellulose le Alkali (hangata sodium hydroxide) ho kenya letsoho lihlopha tsa hydroyl. Sena se etsa hore ba sebetse haholoanyane nakong ea ho arabela ka lipotso le oxide ea inthanete.
4. Tekanyo ea methylation:
Taolo: Laola boemo ba ho boloka Methylation (DS) nakong ea karabelo ho fihlela thepa e lakatsehang ea HPMC. Boemo ba ho subatsa li ama qubu, Viscosity, le thepa e 'ngoe ea sehlahisoa sa ho qetela.
Hydropyproppylation:
Karabelo: Ke ile ka etsa karabelo: Keele e sebetsang e kenngoeng ka nako eo e sebelisitsoe ka popelo ea inthanete tlasa maemo a laoloang. Sena se fella ka hore ho ka etsahala ka lisebelisoa tsa Hydroxypropyl haufi le ketane ea cellulo.
Mofuthu le Khatello: Ho sebelisa maemo a ho sebelisa ka hloko, ho kenyelletsa mocheso le khatello, ho netefatsa ts'ebetso ea ts'ebetso le boleng ba sehlahisoa.
5. Ntonalisa le ho hlatsoa:
Asid acid acid: Kamora karabelo, sehlahisoa ha se nke lehlakore ka acid ho tlosa setsi se feteletseng.
Ho hlapa: HPMC e hlatsoa ho tlosa litšila, lisebelisoa tse sa tsejoeng le lihlahisoa tse ngata. Mohato ona ke oa bohlokoa ho fumana sehlahisoa sa ho qetela se phahameng sa ho hloekisa.
6. Ho omella:
Ho tlosoa ha metsi: Mohato oa ho qetela ke ho omisa HPMC ho tlosa mongobo ofe kapa ofe o setseng. Sena se mefuta ea HPMC ka foromo ea phofo, e ka sebetsoa hape le ho sebelisoa likopo tse fapaneng tsa lits'ebetso.
Lisebelisoa tse tala tsa HPMC li kenyeletsa cellulose e tsoang ho Celllulose Ts'ebetso ea Synthesis e kenyelletsa ho na le kelello, hydroxypropylation, ho se nke lehlakore le ho omella, ho omella, ho omella, ho omella, ho omella, ho omella le ho omella le ho omella le ho omella. HPMC ha e fetohe sebopeho sa lik'hemik'hale e ikhethang, e e etsa motsoako oa bohlokoa ho lihlahisoa tsa bohlokoa ho lihlahisoa tse fapaneng.
Poso: Feb-19-2025