Lithuto tsa ramatiki tsa Hydroxypropyl Methylcellulose (HPMC) li-thickener system li bohlokoa bakeng sa ho utloisisa boitšoaro ba tsona lits'ebetsong tse fapaneng, ho tloha ho meriana ho ea ho lijo le litlolo. HPMC ke karolo e tsoang ho cellulose ether e sebelisoang haholo joalo ka ntho e tenya, stabilizer le emulsifier ka lebaka la bokhoni ba eona ba ho fetola thepa ea rheological ea tharollo le ho emisoa.
1.Litekanyo tsa Viscosity:
Viscosity ke e 'ngoe ea thepa ea mantlha ea rheological e ithutoang lits'ebetsong tsa HPMC. Ho sebelisoa mekhoa e fapaneng e kang rotational viscometry, capillary viscometry le oscillatory rheometry ho lekanya viscosity.
Lithuto tsena li hlakisa phello ea lintlha tse kang khatello ea HPMC, boima ba limolek'hule, tekanyo ea ho fetola, mocheso, le sekhahla sa ho kuta ho viscosity.
Ho utloisisa viscosity ho bohlokoa kaha ho khetholla boits'oaro ba phallo, botsitso, le ts'ebeliso e nepahetseng ea litsamaiso tse teteaneng tsa HPMC.
2. Boitšoaro ba ho Beta-Seta:
Litharollo tsa HPMC hangata li bonts'a boits'oaro ba ho kuta, ho bolelang hore viscosity ea bona e fokotseha ka sekhahla se ntseng se eketseha sa ho kuta.
Lithuto tsa ramatiki li shebana le boholo ba ho kuta le ho its'etleha holima lintlha tse joalo ka ho tsepamisa mohopolo oa polymer le mocheso.
Boitšoaro bo khethollang ho kuta moriri ke ba bohlokoa bakeng sa lits'ebetso tse kang liphahlo le li-adhesives, moo ho phallang nakong ea kopo le botsitso ka mor'a kopo ke habohlokoa.
3.Thixotropy:
Thixotropy e bua ka ho hlaphoheloa ho itšetlehileng ka nako ea viscosity ka mor'a ho tlosoa ha khatello ea ho kuta. Litsamaiso tse ngata tsa HPMC li bonts'a boitšoaro ba thixotropic, bo leng molemo lits'ebetsong tse hlokang phallo e laoloang le botsitso.
Lithuto tsa ramatiki li kenyelletsa ho lekanya ho hlaphoheloa ha viscosity ha nako e ntse e feta ka mor'a ho beha tsamaiso khatellong ea ho kuta.
Ho utloisisa lithuso tsa thixotropy ha ho etsoa lihlahisoa tse kang lipente, moo botsitso nakong ea polokelo le boiketlo ba kopo ke tsa bohlokoa.
4.Gelation:
Libakeng tse phahameng kapa tse nang le li-additives tse khethehileng, tharollo ea HPMC e ka kena ka har'a gelation, e etsa sebopeho sa marang-rang.
Lithuto tsa ramatiki li etsa lipatlisiso ka boitšoaro ba gelation mabapi le lintlha tse kang ho tsepamisa maikutlo, mocheso le pH.
Lithuto tsa Gelation li bohlokoa bakeng sa ho rala litlhare tse lokolotsoeng ka nako e telele le ho theha lihlahisoa tse tsitsitseng tse thehiloeng ho li-gel indastering ea lijo le ea tlhokomelo ea motho.
5. Sebopeho sa Sebopeho:
Mekhoa e kang ho hasanya ha X-ray e nyenyane (SAXS) le rheo-SAXS e fana ka lintlha tse mabapi le microstructure ea tsamaiso ea HPMC.
Lithuto tsena li senola tlhahisoleseling mabapi le khokahano ea ketane ea polymer, boitšoaro ba ho kopanya, le tšebelisano le limolek'hule tsa solvent.
Ho utloisisa likarolo tsa sebopeho ho thusa ho bolela esale pele boits'oaro ba macroscopic rheological le ho ntlafatsa meralo ea thepa e lakatsehang.
6.Dynamic Mechanical Analysis (DMA):
DMA e lekanya thepa ea viscoelastic ea thepa tlas'a deformation ea oscillatory.
Lithuto tsa ramatiki tse sebelisang DMA li hlakisa liparamente tse kang modulus oa polokelo (G'), modulus ea tahlehelo (G”), le viscosity e rarahaneng e le ts'ebetso ea khafetsa le mocheso.
DMA e bohlokoa haholo bakeng sa ho tšoaea boits'oaro bo tiileng le bo kang mokelikeli ba li-gel le li-pastes tsa HPMC.
7. Lithuto tse khethehileng tsa kopo:
Lithuto tsa ramatiki li etselitsoe lits'ebetso tse ikhethileng joalo ka matlapa a litlama, moo HPMC e sebelisoang joalo ka setlama, kapa lihlahisoa tsa lijo joalo ka li-sauces le li-dressings, moo e sebetsang joalo ka motenya le botsitso.
Lithuto tsena li ntlafatsa meralo ea HPMC bakeng sa thepa e lakatsehang ea phallo, sebopeho, le botsitso ba lishelefo, ho netefatsa ts'ebetso ea sehlahisoa le kamohelo ea bareki.
lithuto tsa rheological li bapala karolo ea bohlokoa ho utloisisa boits'oaro bo rarahaneng ba litsamaiso tse teteaneng tsa HPMC. Ka ho hlakisa viscosity, shear-thinning, thixotropy, gelation, sebopeho sa sebopeho, le thepa e ikhethileng ea ts'ebeliso, lithuto tsena li thusa meralo le ntlafatso ea liforomo tse thehiloeng ho HPMC ho pholletsa le liindasteri tse fapaneng.
Nako ea poso: May-10-2024