Na HPMC le CMC li ka kopanya
Methyl cellulose e tšoeu kapa e tšoeu joalo ka phofo ea fibrous kapa granular;Ha e na monko, e sa latsoeheng.Sehlahisoa sena ka ho ruruha ha metsi ka tharollo e hlakileng kapa e nyenyane ea colloidal;Ha e qhibilihe ka ho feletseng ka ethanol, chloroform kapa diethyl ether.E qhalakanngoa ka potlako le ho ruruha metsing a chesang a 80-90 ℃, 'me e qhibiliha ka potlako ka mor'a ho pholile.Tharollo ea metsi e tsitsitse haholo mocheso oa kamore, 'me e ka gel ka mocheso o phahameng,' me gel e ka fetoha ka tharollo ka mocheso.
E na le mongobo o babatsehang, ho hasana, ho khomarela, ho teteaneng, emulsification, ho boloka metsi le ho etsa filimi, hammoho le ho se lekane ha oli.Filimi e na le thata e babatsehang, ho tenyetseha le ho pepeseha.Hobane ha e na ionic, e ka lumellana le li-emulsifiers tse ling, empa ho bonolo ho letsoai, 'me tharollo e tsitsitse ka har'a PH2 - 12. Sodium carboxymethyl cellulose Sehlahisoa sena ke letsoai la sodium ea cellulose carboxymethyl ether, ke ea anionic cellulose ether, ke phofo e tšoeu kapa e tšoeu ea milky kapa karoloana, boima ba 0.5-0.7 g/cubic centimeter, e batla e se na monko, ha e latsoehe, e hygroscopic.Ho bonolo ho qhalakana ka metsing ka tharollo ea gelatinous e bonaletsang, e sa keneng ka har'a ethanol le litlhare tse ling tsa tlhaho.
Ha pH ea tharollo ea metsi e le 6.5 - 8.5, viscosity ea slurry e fokotseha haholo ha pH e le> 10 kapa <5, 'me tshebetso e molemo ka ho fetisisa ha pH e le 7. Bakeng sa botsitso ba mocheso, viscosity e phahama ka potlako ka tlase. 20 ℃, e fetoha butle ho 45 ℃, 'me colloid denaturation le viscosity le thepa e fokotseha haholo ha e futhumala nako e telele ho feta 80℃.Ho qhibiliha ha bonolo ka metsing, tharollo e bonaletsang;E tsitsitse haholo ka tharollo ea alkaline, 'me e bonolo ho hydrolyze tabeng ea acid.Ha pH ea boleng e le 2-3, pula e tla ba teng, 'me pula e tla boela e be teng tabeng ea matsoai a tšepe a mangata.Hydroxypropyl methyl cellulose, eo hape e tsejoang e le hydroxypropyl methyl cellulose, cellulose hydroxypropyl methyl ether, ke khetho ea selulose ea k'hothone e hloekileng haholo e le thepa e tala, tlasa maemo a alkaline ka etherification e khethehileng le boitokiso.
E qhibiliha ka metsing le ka bongata ba polar C le karolo e loketseng ea ethanol / metsi, propanol / metsi, dichloroethane, joalo-joalo, e sa qhibilihe ka har'a diethyl ether, acetone, absolute ethanol, ho ruruha metsing a batang ho ba tharollo ea colloidal e hlakileng kapa e nyenyane hanyenyane.Tharollo ea metsi e na le mosebetsi oa holim'a metsi, pepeneneng e phahameng le ts'ebetso e tsitsitseng.HPMC e na le thepa ea gel e chesang.Kamora ho futhumatsa, tharollo e nang le metsi a sehlahisoa e theha pula ea li-gel, ebe e qhibiliha kamora ho pholile.Mocheso oa gel oa litlhaloso tse fapaneng o fapane.
Nako ea poso: Sep-09-2022