Hydroxypropyl Methylcellulose (HPMC)leSelelulose ea Methyl Hydroxyethyl (MHEC)ke tse peli tsa li-ether tsa cellulose tse sebelisoang haholo tse tsoang ho cellulose ea tlhaho, e leng polymer e fumanoang maboteng a sele ea limela. Metsoako ena e fetoloa ka mekhoa ea lik'hemik'hale ho hlahisa thepa e bontšang ho teteana, ho boloka metsi, ho thehoa ha filimi le thepa ea ho tlama. Leha li arolelana litšobotsi tse tšoanang tsa ts'ebetso, li fapana ka sebopeho sa lik'hemik'hale, thepa, lits'ebetso le ts'ebetso tlas'a maemo a fapaneng.

1. Sebopeho le Sebopeho sa Lik'hemik'hale

HPMC (Hydroxypropyl Methylcellulose)

HPMC ke ether ea cellulose e seng ea ionic e hlahisoang ke ho sebetsana le cellulose ka methyl chloride le propylene oxide. Lihlopha tsa hydroxyl (-OH) mokokotlong oa cellulose li nkeloa sebaka ka karolo ke lihlopha tsa methoxy (-OCH₃) le hydroxypropyl (-CH₂CHOHCH₃).

MHEC (Methyl Hydroxyethyl Cellulose)

Ka lehlakoreng le leng, MHEC e hlahisoa ka ho kopanya cellulose le ethylene oxide le methyl chloride. Sena se hlahisa lihlopha tsa methoxy (-OCH₃) le hydroxyethyl (-CH₂CH₂OH).

Liphapang tsa Bohlokoa Sebopehong:

HPMC e na le di-substituent tsa hydroxypropyl, ha MHEC yona e na le dihlopha tsa hydroxyethyl.

Mofuta oa sehlopha sa ether o ama ho feto-fetoha ha metsi, ho qhibiliha ha metsi le boitšoaro ba ho futhumatsa.

Boitšoaro ba Viscosity: HPMC le MHEC ka bobeli li fumaneha ka mekhahlelo e fapaneng ea viscosity, e etselitsoeng lits'ebetso tse fapaneng. Leha ho le joalo, sebopeho sa limolek'hule se ama tsela eo viscosity e itšoarang ka eona tharollong. HPMC hangata e fana ka gelation e betere ea mocheso le viscosity e tsitsitseng holim'a pH e pharaletseng.

3. Matlotlo a Sebetsang

Ho Boloka Metsi:

Lisebelisoa tsena ka bobeli ke metsoako e metle ea ho boloka metsi, e leng sa bohlokoa lits'ebetsong tse thehiloeng ho samente le tse thehiloeng ho gypsum. Leha ho le joalo, HPMC ka kakaretso e fana ka ho boloka metsi ho betere hanyane, e leng se etsang hore e be khetho e ratoang ka har'a li-mortar tse kopantsoeng tse omileng, likhomaretsi tsa tile le li-render.

Phello ea ho Tetefala:

MHEC e atisa ho hlahisa viscosity e boreleli le e tsitsitseng haholoanyane litharollong tsa metsi, e leng se etsang hore e be e lakatsehang bakeng sa lits'ebetso moo phallo e tsitsitseng le bokhoni ba ho sebetsa li hlokahalang.

Tlhahiso ea Lifilimi:

HPMC e atisa ho etsa lifilimi tse tenyetsehang le tse bonaletsang haholoanyane, ha MHEC eona e etsa lifilimi tse bonolo. Liphapang tsena li ama ts'ebeliso ea lipente le likhomaretsi tse holim'a metsi.

Ho kenella ha mocheso:

HPMC e feta mochesong o feteletseng, e leng se etsang gel ha e futhumatsoa. ​​MHEC e boetse e bontša mocheso o phahameng o feteletseng, empa ka tekanyo e nyane. Thepa ena e bohlokoa haholo-holo lits'ebetsong tsa meriana le lijo moo ho hlokahalang thibelo kapa sebopeho sa gel.

4. Likopo

HPMC le MHEC ka bobeli li sebelisoa liindastering tse fapaneng. Leha ho le joalo, litšobotsi tse itseng tsa ts'ebetso li etsa hore e 'ngoe e tšoanelehe ho feta e 'ngoe bakeng sa lits'ebetso tse itseng.

4.1 Indasteri ea Kaho

HPMC:

Likhomaretsi tsa thaele

Liplaster le litšoantšo tse thehiloeng samenteng

Metsoako e iketsang

Mekhoa ea ho qeta ho kenya thepa ka ntle (EIFS)

Liplaster tse entsoeng ka gypsum

Melemo ea Kaho:

Ho boloka metsi a mangata

Nako e betere ea ho bula likhomaretsi

Ho sebetsa hantle ho ntlafetseng

MHEC:

Lijase tse hlobotseng letlalo

Samente e bobebe

Likhomaretsi tsa pampiri ea ho phuthela

Metswako e kopantsoeng e lokisitsoeng

Melemo ea Kaho:

Ho tsitsa ho boreleli

Litšobotsi tse ntle tsa ho khomarela

Mokhoa o bonolo oa ho kopanya

4.2 Meriana

HPMC:

E sebelisoa e le sesebelisoa sa ho tlama le ho koahela filimi matlapeng

Mekhoa ea taolo ea tokollo ea lithethefatsi e laoloang

Marotholi a mahlo le li-gel tsa mahlo

MHEC:

Ha e sebelisoe hangata ka lebaka la thepa ea eona e tlase ea gelation, empa e ntse e sebetsa ho:

Li-suspension tsa molomo

Mekhoa ea ho etsa lintho tse ka holimo

4.3 Lipente le Liaparo

MHEC:

Hangata e kgethwa penteng e thehilweng metsing ka lebaka la boitshwaro bo botle ba pseudoplastic (ho fokotsa ho kuta)

E ntlafatsa ho hlanya le tšebeliso e boreleli

HPMC:

E boetse e sebelisoa penteng, haholo-holo ha ho hlokahala hore ho be le thepa e ngata ea ho boloka metsi kapa ho kenya metsi ka har'a gel.

D. Disepa tsa ho hlwekisa le Tlhokomelo ya Motho ka Mong

HPMC:

Li-shampoo, li-conditioner le litlolo tse hloekisang letlalo

E sebetsa e le setefatsi le se tsitsitseng

MHEC:

Sesepa sa matsoho le lihlatso tsa 'mele

E kgethwa bakeng sa ho hlaka ho ntlafetseng le bonolo ba ho e ngola

4.4 Indasteri ea Lijo

HPMC:

E amohetsoe e le sehlomathiso sa lijo (E464)

E sebelisoa ka har'a likhasephe tsa meroho, lihlahisoa tsa bohobe, le lisoso tse entsoeng ka emulsified

E thusa ka sebopeho le botsitso

MHEC:

Ha e amoheloe haholo bakeng sa tšebeliso ea lijo; tšebeliso e lekanyelitsoeng

5. Likarolo tsa Tikoloho le Taolo

HPMC le MHEC ka bobeli ha li na chefo, lia bola, ebile ha li na ionic, e leng se etsang hore li bolokehe bakeng sa tšebeliso lihlahisoa tse ngata. Leha ho le joalo:

HPMC e amohetsoe haholo bakeng sa tšebeliso ea meriana le lijo.

MHEC e sebelisoa haholo-holo lits'ebetsong tsa indasteri le tsa litlolo.

6. Litšenyehelo le Boteng ba tsona

Ka kakaretso MHEC e theko e tlase ho feta HPMC ka lebaka la ts'ebetso ea eona ea tlhahiso e bonolo hanyane le tlhoko e tlase mebarakeng ea meriana le ea maemo a lijo. Leha ho le joalo, tšebeliso e pharaletseng ea HPMC, haholo-holo liindastering tse laoloang, e lokafatsa theko ea eona e phahameng.

Litsamaisong tse sebetsang hantle joalo ka likhomaretsi tsa thaele kapa li-render moo ho hlokahalang ho boloka metsi le ho khomarela ho hoholo, HPMC ea khethoa. Ka lehlakoreng le leng, bakeng sa ts'ebeliso e boreleli le bonolo ba ho kopanya, joalo ka metsoakong ea manonyeletso kapa li-putty tsa leboteng, MHEC e ka sebetsa hantle haholoanyane.

Ha a ntse aHPMCleMHECke di-ether tsa cellulose tse tshwanang ka dikhemikhale, dihlopha tsa tsona tse fapaneng tse nkelang sebaka (hydroxypropyl ho HPMC vs. hydroxyethyl ho MHEC) di lebisa diphapang tse utlwahalang tshebetsong, haholoholo mabapi le ho kenella ha mocheso, ho boloka metsi, ho thehwa ha filimi, le ho tsamaellana ha tshebediso.