Hydroxypropypropypropinyl methylcelllulolose (HPMC) e sebelisoa haholo ka mehoma ea kaho ka lebaka la mesebetsi ea eona e nang le letšolo. Makhoaba a kaho a phetha karolo ea bohlokoa likolong tse fapaneng tsa lits'ebetso, ho kenyelletsa le litoropo, liholefo tsa lebota le phasele. Meravera ena e hloka ho ba le thepa e itseng, e kang tšenyeho e matla, ho ba le kahlolo e molemo hantle le ho tšoarella ho netefatsa maemo a fapaneng a kaho. Hydroxypropypropypropinyl methylcelllulose (HPMC) ke e 'ngoe ea litlatsetso tsa bohlokoa ka lidhereives tse thellang. Mekhoa ea bona e ikhethang e ntlafatsa haholo ts'ebetso le ho se phethahale ha liride tsena.
1.CHEMIS
HydroxypropitypropityPyLyproPyLulose. E hlahisoa ke Celdilose le Alkali ebe o nka khato ea ho ngola exide ea ho hlahloba lihlopha tsa hydroxypropyl. Kamora moo, methyl chloride e ne e sebelisetsoa ho hlahisa lihlopha tsa methyl, ka ho etsa joalo e theha sebopeho ka hydroxypropypropyL (-ch2Chohch3) le methyl (-ch3) le methyl (-ch3) le methyl (-ch3) le methyl (-ch3) Sebopeho sena sa lik'hemik'hale se fa hpmc mefuta ea mefuta-futa, e etsa hore e tšoanele lits'ebetso tse fapaneng.
Karolo ea HPMC ka mekhoa e khahlehang
HPMC e sebetsa meputso e fapaneng ea litlhahiso tsa ho ka hahoe. Taba ea pele, e sebetsa joaloka mokuli oa Rheology, ea laolang viccosion le boitšoaro ba ho phalla ha khomarela. Taba ea bobeli, e ntlafatsa bohato ka ho thibela karohano le ho lula ha likaroloana tse tiileng motsoako o mongata. Taba ea boraro, HPMC e ntlafatsa matla a khomaretseng a khomaretseng mme o khothalletsa ho tlala e matla pakeng tsa ho khomarela le substrate. Ntle le moo, e thusa ho atolosa nako le ho boloka bophelo ba ho alima, ho lumella nako e lekaneng ea ho sebelisa kopo le ho hlophisoa pele ho imeloa.
3. Theko ea mantlha ea HPMC ka likhahla tsa kaho
3.1 Ho boloka metsi
E 'ngoe ea thepa ea bohlokoahali ea HPMC ka mekhoa ea kaho ke bokhoni ba eona ba ho boloka metsi. HPMC MOELCKULES e theha sebopeho sa marang-rang matrix e khomaretseng, ho lelekisa limolek'hule tsa metsi ka litlamo tsa haedrojene. Bokhoni bona bo tšoeroeng ke metsi bo thusa ho phahamisa mokhoa oa karolo ea mabenkele, ho khothaletsa matla a nepahetseng le matla a bonts'i le eketsehileng. Ho boloka metsi a lekaneng ho bohlokoa, haholo-holo maemong a tlase a mongobo kapa nakong ea linako tse telele tsa ho phoqa, ho netefatsa ts'ebetso e nepahetseng.
3.2 Thunya
HPMC e sebetsa e le thipa ea kaho, e fetisang pono le botsitso ho tsebiso ea matla. Ho ba teng ha hydroxypropyl le lihlopha tsa methyl li lumella limolek'hule tsa HPMC ho sebelisana le limolek'hule tsa metsi ebe li theha sebopeho sa gel. Kholiseho ena e ntlafalitsoeng e ntlafalitse thepa ea sehatsetsi le thepa e sa tsoakoang, e etsa hore ho be bonolo ho etsa kopo ea lintoa tse otlolohileng ntle le ho thella kapa ho matha. Ho laola pono ea hod'eno ho bohlokoa ho fihlela ho fumana tšireletso e nepahetseng le se tšoanang nakong ea kopo.
3.3 Adeasion
HPMC e ntlafatsa thepa ea ho banya mabelo a kaho ka ho ntšetsa pele lithupelo tse sa lekanyetsoang pakeng tsa ho khomarela le sebaka se phahameng. Ho ba teng ha hydroxypropyl le lihlopha tsa methyl ho e lumella ho theha lehong, konkreite, ceramics le tšepe. Fihlella hodhesion e matla le tsheho e phahameng ea tlamo le tlasa maemo a thata joalo ka mongobo o moholo kapa mocheso oa mocheso. Ho ntlafatsa boima ba 'mele le balek'hule tsa HPMC ho ka ntlafatsa thepa ea ho hlakoloa ea khomare.
3.4 Formation ea lifilimi
Ntle le karolo ea eona e lebisang khodifong, HPMC e thusa ho theha filimi e tsoelang pele ho substrate. Nakong ea ts'ebetso ea ho omisa le e fokang, limolek'hule tsa HPMC le ho kena, ho etsa filimi e kopaneng e matlafatsang likaroloana tsa khabone le ho latela substrate. Filimi ea sebetsa e le tšitiso, e sireletsa khakolelong ea tikoloho e kang mongobo, mocheso le khatello ea maikutlo. Ntle le moo, thepa e etsang lifilimi ea HPMC e thusa ho ntlafatsa tlhokahalo ea tumello ea ho khomarela le ho hanyetsana la boemo ba leholimo.
4. Kameho ea HPMC ka har'a thepa ea likhohola ke ea lerato
Ho eketsa HPMC ho latela meralo ea kaho e ka ama litšobotsi tsa bona hantle haholo. Khetho e nepahetseng ea sehlopha sa HPMC, tsepamisa maikutlo le litekanyetso tsa khatello ea maikutlo ho fihlela thepa ea khatiso le litlhokahalo tsa kopo ea kopo. HPMC e ngata haholo HPMC e ka fella ka matla a mangata, a fokotsoa ke matla, ha litaba tse sa sebetseng hantle tsa HPMC li ka baka ho ba le boikemisetso bo bobe le ho se lekane. Ka hona, foromo ea ts'ebetso le tlhahlobo li bohlokoa ho lekanya thepa e fapaneng ea HPMC ebe u fihlela ts'ebetso e nepahetseng ea ho ba teng.
Hydroxypropypropypropinyl Methylcelulolose (HPMC) e bapala karolo ea bohlokoa ho ntlafatsa ts'ebetso le maemo a ho qala mabelo a kaho. Litokiso tsa eona tse ikhethang, ho kenyelletsa ho boloka metsing, ho thusa, ho latela mekhoa ea lifilimi, thusa ho ntlafatsa ts'ebetso e akaretsang ea lits'ebetso tsa kaho. Ka ho utloisisa thepa ea bohlokoa ea HPMC le litlamorao tsa tsona lifonong, bathetsi ba ka ntlafatsa mekhoa e meng ea ts'ebetso le netefatsa ho ts'epahala maemong a fapaneng a kaho.
Poso: Feb-18-2025