I-methylcellulose imhlophe noma i-off-white fibrous noma i-granular powder; ayinaphunga futhi ayinambitheki. Lo mkhiqizo ukhukhumala ube yisisombululo se-colloidal esicacile noma esincane emanzini; ayincibiliki ku-ethanol, i-chloroform noma i-ether. Hlakaza ngokushesha futhi uvuvuke emanzini ashisayo ku-80-90 ° C, futhi uhlakaze ngokushesha ngemva kokupholisa phansi. Isixazululo se-aqueous sizinzile ekamelweni lokushisa, futhi singafaka i-gel ekushiseni okuphezulu, futhi ijeli ingashintsha nesisombululo ngezinga lokushisa.
Inokumanzisa okuhle kakhulu, i-dispersibility, ukunamathela, ukuqina, i-emulsification, ukugcinwa kwamanzi kanye nezakhiwo zefilimu, kanye nokungangenisi kuwoyela. Ifilimu eyakhiwe inokuqina okuhle kakhulu, ukuguquguquka nokungafihli. Ngenxa yokuthi ayiyona i-ionic, ingahambisana namanye ama-emulsifiers, kodwa kulula ukuyikhipha usawoti, futhi isixazululo sizinzile ebangeni le-PH2-12. I-Sodium Carboxymethyl Cellulose Lo mkhiqizo uwusawoti we-sodium we-cellulose carboxymethyl ether, okuyi-anionic cellulose ether, impushana emhlophe noma emhlophe emhlophe noma ama-granules, anobuningi obungu-0.5-0.7 g/cm3, cishe ayinaphunga futhi ayinambitheki, ene-hygroscopicity. Ihlakazeka kalula emanzini ukuze yenze isixazululo se-colloidal esobala, esingancibiliki kumakhemikhali ezinto eziphilayo njenge-ethanol.
I-pH yesisombululo esinamanzi ngu-6.5-8.5. Uma i-pH i> 10 noma <5, i-viscosity yeglue izoncishiswa kakhulu, futhi ukusebenza kungcono kakhulu uma i-pH ingu-7. Izinzile ekushiseni, i-viscosity ikhuphuka ngokushesha ngaphansi kwe-20 ° C, futhi ishintsha kancane ku-45. °C. Ukushisa isikhathi eside ngaphezu kuka-80°C kungashintsha i-colloid futhi kunciphise ngokuphawulekayo i-viscosity nokusebenza. Incibilika kalula emanzini, futhi isisombululo sisobala; izinzile kakhulu kusisombululo se-alkaline, kodwa i-hydrolyzed kalula uma ihlangana ne-asidi, futhi izokwehla lapho inani le-pH liyi-2-3, futhi izophinde isabele ngosawoti wensimbi oyi-polyvalent. IHydroxypropyl methylcellulose, eyaziwa nangokuthi i-hypromellose kanye ne-cellulose hydroxypropyl methyl ether, yenziwe nge-cellulose kakotini ecwenge kakhulu njengento eluhlaza, efakwa etherified ngokukhethekile ngaphansi kwezimo ze-alkali.
Incibilika emanzini nakuma-polar c amaningi kanye nezilinganiso ezifanele ze-ethanol/amanzi, i-propanol/amanzi, i-dichloroethane, njll., ayincibiliki ku-ether, i-acetone, i-ethanol ephelele, futhi ikhukhumala ibe i-colloid ecacile noma enamafu kancane kusisombululo samanzi abandayo. Isixazululo esinamanzi sinomsebenzi ongaphezulu, ukukhanya okuphezulu nokusebenza okuzinzile. I-HPMC inendawo ye-thermal gelation. Isixazululo se-aqueous somkhiqizo siyashiswa ukuze senze ijeli futhi sikhuphuke, bese siyancibilika ngemva kokupholisa. Izinga lokushisa le-gelation lokucaciswa okuhlukile lihlukile.
Isikhathi sokuthumela: Feb-24-2023