Methylcellulose ndi woyera kapena woyera fibrous kapena granular ufa; zopanda fungo komanso zosakoma. Mankhwalawa amatupa mumadzi omveka bwino kapena osakanikirana pang'ono; sichisungunuka mu ethanol, chloroform kapena ether. Mwachangu kumwazikana ndi kutupa m'madzi otentha pa 80-90 ° C, ndi kusungunula mwamsanga pambuyo kuzirala pansi. Njira yamadzimadzi imakhala yokhazikika kutentha, ndipo imatha kutentha kwambiri, ndipo gel osakaniza amatha kusintha ndi kutentha.
Ili ndi wettability wabwino kwambiri, dispersibility, adhesiveness, thickening, emulsification, kusungira madzi ndi kupanga mafilimu, komanso kusungunuka kwa mafuta. Kanema wopangidwa ali ndi kulimba kwambiri, kusinthasintha komanso kuwonekera. Chifukwa sichikhala cha ionic, chikhoza kukhala chogwirizana ndi ma emulsifiers ena, koma n'chosavuta kutulutsa mchere, ndipo yankho ndilokhazikika pamtundu wa PH2-12. Sodium Carboxymethyl cellulose Mankhwalawa ndi mchere wa sodium wa mapadi carboxymethyl efa, amene ndi anionic mapadi efa, woyera kapena yamkaka woyera fibrous ufa kapena granules, ndi osalimba a 0.5-0.7 g/cm3, pafupifupi odorless ndi zoipa , ndi hygroscopicity. Mosavuta omwazikana m'madzi kupanga mandala colloidal njira, insoluble mu organic solvents monga Mowa.
PH ya yankho lamadzi ndi 6.5-8.5. Pamene pH ndi> 10 kapena <5, kukhuthala kwa guluu kudzachepetsedwa kwambiri, ndipo ntchitoyo ndi yabwino kwambiri pamene pH ili 7. Kukhazikika kwa kutentha, kukhuthala kumakwera mofulumira pansi pa 20 ° C, ndikusintha pang'onopang'ono pa 45. °C. Kutentha kwa nthawi yayitali pamwamba pa 80 ° C kumatha kusokoneza colloid ndikuchepetsa kwambiri kukhuthala ndi magwiridwe antchito. Imasungunuka mosavuta m'madzi, ndipo yankho limakhala loonekera; imakhala yokhazikika mumchere wa alkaline, koma imasungunuka mosavuta ikakumana ndi asidi, ndipo imatsika ngati pH mtengo ndi 2-3, komanso imachitanso ndi mchere wazitsulo wa polyvalent. Hydroxypropyl methylcellulose, yomwe imadziwikanso kuti hypromellose ndi cellulose hydroxypropyl methyl ether, imapangidwa ndi thonje la thonje loyera kwambiri ngati zopangira, zomwe zimapangidwira mwapadera pansi pamikhalidwe yamchere.
Kusungunuka m'madzi ndi polar kwambiri c ndi magawo oyenerera a ethanol / madzi, propanol / madzi, dichloroethane, ndi zina zotero, osasungunuka mu etha, acetone, ethanol mtheradi, ndipo amatupa kukhala colloid yomveka bwino kapena yamtambo pang'ono m'madzi ozizira. Njira yothetsera madzi imakhala ndi zochitika zapamtunda, zowonekera kwambiri komanso zokhazikika. HPMC ali ndi katundu wa matenthedwe gelation. The mankhwala amadzimadzi njira ndi usavutike mtima kupanga gel osakaniza ndi precipitates, ndiyeno dissolves pambuyo kuzirala. Kutentha kwa gelation kwazinthu zosiyanasiyana kumasiyana.
Nthawi yotumiza: Feb-24-2023