Hydroxyethyl methylcellulose ke eng?

alias: hydroxyethyl methyl cellulose; hydroxyethyl methyl cellulose; hydroxymethyl ethyl cellulose; 2-hydroxyethyl methyl ether cellulose
Li-aliases tsa Senyesemane: Methylhydroxyethylcellulose; Cellulose; 2-hydroxyethyl methyl ether; HEMC; Tyopur MH[1]
Khemistri: Hydroymethylmethylcellulose;Hydroxyethyl methylcellulose; Hydroxymethylethylcellulose.
Ngoliso ea CAS: 9032-42-2

Molek'hule: C2H6O2 xCH4O x PhEur 2002 e hlalosa hydroxyethyl methylcellulose e le karolo ea O-methylated, karolo e itseng ea O-hydroxymethylated cellulose. Litlhaloso tse fapaneng li hlahisoa ke boleng bo bonahalang ba viscosity ea 2% w / v tharollo ea metsi ka 20 ° C, 'me yuniti ke mPa s.
Boima ba molek'hule: PhEur 2002 e hlalosa hydroxyethyl methylcellulose e le karolo ea O-methylated, karolo e itseng ea O-hydroxymethylated cellulose. Litlhaloso tse fapaneng li hlahisoa ke boleng bo bonahalang ba viscosity ea 2% w / v tharollo ea metsi ka 20 ° C, 'me yuniti ke mPa s.

Litšobotsi tsa mantlha tsa hydroxyethyl methylcellulose (HEMC) ke:

1. Ho qhibiliha: Ho qhibiliha ka metsing le lihlapolli tse ling tsa tlhaho. HEMC e ka qhibiliha ka metsing a batang. Boemo ba eona bo phahameng ka ho fetisisa bo khethoa feela ke viscosity. Sollubility e fapana ho ea ka viscosity. The viscosity e ka tlaase, e kholoanyane ea ho qhibiliha.

2. Ho hanyetsa letsoai: Lihlahisoa tsa HEMC ha li na ionic cellulose ethers 'me ha li polyelectrolyte, kahoo li batla li tsitsitse ka tharollo ea metsi ha letsoai la tšepe kapa li-electrolyte tse phelang li le teng, empa ho eketsoa ho feteletseng ha electrolyte ho ka baka gelation le pula.

3. Mosebetsi oa holim'a metsi: Ka lebaka la ts'ebetso e sebetsang ea holim'a metsi a metsi, e ka sebelisoa e le moemeli oa tšireletso ea colloidal, emulsifier le dispersant.

4. Gel ea Thermal: Ha sehlahisoa sa HEMC se nang le metsi a metsi se futhumetse mocheso o itseng, se fetoha opaque, li-gel, le precipitates, empa ha se tsoela pele ho pholile, se khutlela sebakeng sa pele sa tharollo, 'me gel le pula e hlaha. Thempereichara haholo-holo e itšetlehile ka mafura a bona, lithuso tsa ho emisa, li-colloids tse sireletsang, li-emulsifiers, joalo-joalo.

5. Metabolic inertness le monko o fokolang le monko o monate: HEMC e sebelisoa haholo lijong le meriana hobane e ke ke ea sebelisoa 'me e na le monko o fokolang le monko o monate.

6. Ho hanyetsa hlobo: HEMC e na le khanyetso e ntle ea hlobo le botsitso bo botle ba viscosity nakong ea polokelo ea nako e telele.

7. PH botsitso: The viscosity ea tharollo e nang le metsi a lihlahisoa tsa HEMC ha e amehe ka thata ke acid kapa alkali, 'me boleng ba pH bo batla bo tsitsitse ka har'a 3.0-11.0.
Kopo: Hydroxyethyl methylcellulose e ka sebelisoa e le moemeli oa tšireletso ea colloidal, emulsifier le dispersant ka lebaka la ts'ebetso ea eona e sebetsang ka holim'a metsi a metsi. Mohlala oa ts'ebeliso ea eona ke o latelang: tšusumetso ea hydroxyethyl methylcellulose ts'ebetsong ea samente. Hydroxyethyl methylcellulose ke phofo e tšoeu e sa nkheng, e sa latsoeheng, e se nang chefo e ka qhalloang metsing a batang ho etsa tharollo e hlakileng ea viscous. E na le litšoaneleho tsa ho teteana, ho tlama, ho qhalakanya, emulsifying, filimi-forming, suspending, adsorbing, gelling, surface active, ho boloka mongobo le ho sireletsa colloid. Kaha tharollo ea metsi e na le mosebetsi o sebetsang ka holim'a metsi, e ka sebelisoa e le moemeli oa tšireletso ea colloidal, emulsifier le dispersant. Hydroxyethyl methylcellulose aqueous solution e na le hydrophilicity e ntle mme ke sesebelisoa se sebetsang sa ho boloka metsi.