Ka bobeli hydroxypropyl methylcellulose le hydroxyethyl cellulose ke selulose

Hydroxypropyl methylcellulose (HPMC)le hydroxyethyl cellulose (HEC) ke lintho tse peli tsa bohlokoa tse tsoang ho cellulose tse sebelisoang haholo liindastering tse sa tšoaneng ka lebaka la thepa ea tsona e ikhethang. Le ha ka bobeli li nkiloe ho selulose, li na le libopeho tse fapaneng tsa lik'hemik'hale mme li bonts'a litšobotsi le ts'ebeliso e fapaneng.

1. Kenyelletso ea Li-Derivatives tsa Cellulose:
Cellulose ke polysaccharide ea tlhaho e fumanehang maboteng a lisele tsa semela, e nang le liketane tse melang tsa likarolo tsa tsoekere tse hokahantsoeng ke β(1→4) glycosidic bond. Li-derivatives tsa cellulose li fumanoa ka ho fetola selulose ka lik'hemik'hale ho ntlafatsa thepa e itseng kapa ho hlahisa mesebetsi e mecha. HPMC le HEC ke tse peli tse nkiloeng joalo tse sebelisoang haholo liindastering ho tloha ho tsa meriana ho isa ho tsa kaho.

2. Tšimoloho:
HPMC e entsoe ka ho sebetsana le cellulose ka propylene oxide ho hlahisa lihlopha tsa hydroxypropyl ebe ka mor'a moo methyl chloride ho hlahisa lihlopha tsa methyl. Sena se fella ka ho nkeloa sebaka ha lihlopha tsa hydroxyl ka har'a ketane ea cellulose, e hlahisang sehlahisoa se nang le matla a ho qhibiliha a ntlafalitsoeng le thepa ea ho etsa filimi.

HEC, ka lehlakoreng le leng, e hlahisoa ka ho arabela selulose ka ethylene oxide ho kenyelletsa lihlopha tsa hydroxyethyl. The degree of substitution (DS) ho HPMC le HEC ka bobeli e ka laoloa ka ho fetola maemo a karabelo, e amang thepa ea bona e kang viscosity, solubility, le gelation behavior.

3. Sebopeho sa Lik'hemik'hale:
HPMC le HEC li fapana ka mefuta ea lihlopha tse kenyellelitsoeng mokokotlong oa cellulose. HPMC e na le lihlopha tsa hydroxypropyl le methyl, ha HEC e na le lihlopha tsa hydroxyethyl. Liemeli tsena li fana ka litšobotsi tse ikhethang ho e 'ngoe le e 'ngoe e nkiloeng, e susumetsang boitšoaro ba tsona lits'ebetsong tse fapaneng.

4. Thepa ea 'Mele:
Ka bobeli HPMC le HEC ke lipolima tse qhibilihang ka metsing tse nang le thepa e matla ea ho tenya. Leha ho le joalo, li bonts'a liphapang tsa viscosity, matla a hydration, le bokhoni ba ho etsa lifilimi. HPMC hangata e na le viscosity e phahameng ha e bapisoa le HEC maemong a lekanang, e etsa hore e tšoanelehe bakeng sa lits'ebetso tse hlokang botenya bo boholo.

Ho feta moo, HPMC e etsa lifilimi tse hlakileng le tse momahaneng ka lebaka la likarolo tsa eona tsa methyl, athe HEC e etsa lifilimi tse bonolo le tse bonolo haholoanyane. Phapang ena ea thepa ea lifilimi e etsa hore ntho e 'ngoe le e 'ngoe e tsoang ho eona e tšoanelehe bakeng sa lits'ebetso tse khethehileng tsa meriana, lihlahisoa tsa tlhokomelo ea motho, le liindasteri tsa lijo.

5. Likopo:
5.1 Indasteri ea Litlhare:
Ka bobeli HPMC le HEC li sebelisoa haholo mekhoeng ea meriana e le li-binders, thickeners, le li-agent tse koahelang lifilimi. Li ntlafatsa botšepehi ba letlapa, li laola ho lokolloa ha lithethefatsi, 'me li matlafatsa molomo ka metsoako ea metsi. HPMC e ratoa bakeng sa lihlahisoa tse sa khaotseng ka lebaka la sekhahla sa eona sa ho phalla butle, ha HEC e atisa ho sebelisoa litharollong tsa mahlo le litlolo tsa lihlooho ka lebaka la ho hlaka le ho lumellana ha eona le maro a likokoana-hloko.

5.2 Indasteri ea Kaho:
Ka indasteri ea kaho,HPMCleHECli sebelisoa e le li-additives linthong tse entsoeng ka samente, tse kang li-mortars, grouts, le renders. Li ntlafatsa bokhoni ba ho sebetsa, ho boloka metsi, le ho khomarela, ho fella ka ts'ebetso e ntlafetseng le ho tšoarella ha sehlahisoa sa ho qetela. Hangata HPMC e ratoa bakeng sa matla a eona a phahameng a ho boloka metsi, e leng ho fokotsang ho phunyeha le ho ntlafatsa nako ea ho beha.

5.3 Lihlahisoa tsa Tlhokomelo ea Motho:
Metsoako ka bobeli e fumana ts'ebeliso lihlahisoa tsa tlhokomelo ea motho joalo ka li-shampoo, lotion, le litlolo e le li-ajenti tse tenya, li-emulsifiers le li-stabilizers. HEC e fana ka sebopeho se boreleli le se benyang ho litlolo, ho etsa hore e loketse lihlahisoa tsa tlhokomelo ea moriri le litlolo tsa letlalo. HPMC, ka thepa ea eona e phahameng ea ho etsa lifilimi, e sebelisoa litlolong tsa letsatsi le litlolo tsa litlolo tse hlokang ho thibela metsi le ho apara nako e telele.

5.4 Indasteri ea Lijo:
Indastering ea lijo, HPMC le HEC li sebetsa e le li-ajenti tse teteaneng, li-stabilizers le li-texturizers lihlahisoa tse fapaneng ho kenyeletsoa li-sauces, li-dressings le li-dessert. Li ntlafatsa molomo, li thibela syneresis, 'me li ntlafatsa litšobotsi tsa kutlo tsa metsoako ea lijo. Hangata HPMC e khethoa bakeng sa ho hlaka le botsitso ba mocheso, ho etsa hore e tšoanelehe bakeng sa lisebelisoa tse hlokang li-gel tse bonaletsang le li-emulsions tse tsitsitseng.

6. Qetello:
hydroxypropyl methylcellulose (HPMC) le hydroxyethyl cellulose (HEC) ke lihlahisoa tsa cellulose tse nang le likarolo tse ikhethang tsa lik'hemik'hale, thepa le lisebelisoa. Le ha ka bobeli li fana ka thepa e ntle haholo ea ho tenya le ho etsa lifilimi, li bonts'a phapang ea viscosity, ho hlaka ha filimi le boits'oaro ba hydration. Ho bohlokoa ho utloisisa liphapang tsena bakeng sa ho khetha motsoako o nepahetseng bakeng sa lits'ebetso tse ikhethang ho pholletsa le liindasteri tse kang tsa meriana, kaho, tlhokomelo ea botho le lijo. Ha lipatlisiso li ntse li tsoela pele, ho lebelletsoe hore ho lebeletsoe liphetoho tse ling le tšebeliso ea lintho tse nkiloeng ho cellulose, e leng se tlatselletsang ho tsoeleng pele bohlokoa ba tsona makaleng a fapaneng a indasteri.