Methylcellulose yog dawb los yog tawm-dawb fibrous los yog granular hmoov;tsw thiab tasteless.Cov khoom no swells mus rau hauv ib tug ntshiab los yog me ntsis turbid colloidal tov nyob rau hauv dej;Nws yog insoluble nyob rau hauv kiag li ethanol, chloroform los yog ether.Tshaj tawm sai sai thiab o hauv dej kub ntawm 80-90 ° C, thiab yaj sai sai tom qab txias.Cov tshuaj aqueous yog qhov ruaj khov ntawm chav tsev kub, thiab tuaj yeem gel ntawm qhov kub thiab txias, thiab cov gel tuaj yeem hloov nrog cov tshuaj nrog qhov kub thiab txias.
Nws muaj zoo wettability, dispersibility, adhesiveness, thickening, emulsification, dej tuav thiab film-forming zog, thiab impermeability rau roj.Cov zaj duab xis tsim muaj zoo heev toughness, yooj thiab transparency.Vim tias nws tsis yog-ionic, nws tuaj yeem sib haum nrog lwm cov emulsifiers, tab sis nws yooj yim kom ntsev tawm, thiab cov tshuaj yog ruaj khov nyob rau hauv qhov ntau ntawm PH2-12.Sodium Carboxymethyl Cellulose Cov khoom no yog sodium ntsev ntawm cellulose carboxymethyl ether, uas yog anionic cellulose ether, dawb los yog milky dawb fibrous hmoov los yog granules, nrog ib tug ceev ntawm 0.5-0.7 g / cm3, yuav luag odorless thiab tasteless, nrog hygroscopicity.Yooj yim dispersed nyob rau hauv dej los tsim cov pob tshab colloidal tov, insoluble nyob rau hauv cov organic solvents xws li ethanol.
Qhov pH ntawm cov kua dej aqueous yog 6.5-8.5.Thaum pH yog> 10 lossis <5, viscosity ntawm cov kua nplaum yuav txo qis, thiab qhov ua tau zoo yog qhov zoo tshaj plaws thaum pH yog 7. ruaj khov rau cov cua sov, cov viscosity nce sai hauv qab 20 ° C, thiab hloov maj mam ntawm 45. °C.Lub sijhawm ntev cua sov siab tshaj 80 ° C tuaj yeem ua rau cov colloid thiab txo cov viscosity thiab kev ua haujlwm zoo.Nws yog yooj yim soluble nyob rau hauv dej, thiab cov kua yog pob tshab;Nws yog qhov ruaj khov heev hauv cov tshuaj alkaline, tab sis nws yooj yim hydrolyzed thaum nws ntsib cov kua qaub, thiab nws yuav precipitate thaum pH tus nqi yog 2-3, thiab nws kuj yuav hnov mob nrog polyvalent hlau ntsev.Hydroxypropyl methylcellulose, tseem hu ua hypromellose thiab cellulose hydroxypropyl methyl ether, yog ua los ntawm cov paj rwb ntshiab heev cellulose li raw khoom, uas yog tshwj xeeb etherified nyob rau hauv alkaline tej yam kev mob.
Soluble nyob rau hauv dej thiab feem ntau polar c thiab tsim nyog proportions ntawm ethanol / dej, propanol / dej, dichloroethane, thiab lwm yam, insoluble nyob rau hauv ether, acetone, kiag li ethanol, thiab swells rau hauv ib tug ntshiab los yog me ntsis cloudy colloid nyob rau hauv dej txias.Cov tshuaj aqueous muaj cov dej num saum npoo av, siab pob tshab thiab kev ua haujlwm ruaj khov.HPMC muaj cov cuab yeej ntawm thermal gelation.Cov khoom aqueous tov yog rhuab los ua ib tug gel thiab precipitates, thiab ces dissolves tom qab txias.Lub gelation kub ntawm txawv specifications txawv.
Post lub sij hawm: Feb-24-2023