Kodi hydroxymethylcellulose ndi yofanana ndi hydroxypropyl methylcellulose?

Carboxymethyl cellulose (Carboxymethyl cellulose) imapangidwa ndi zomwe gulu la hydroxyl la gulu la anhydroglucose pa unyolo wa cellulose ndi gulu la etherification (chloro Z acid kapena ethylene oxide);

Ndi mtundu wa amorphous mankhwala sungunuka m'madzi, amadzimadzi alkali njira, ammonia ndi mapadi njira, insoluble mu organic njira ndi mchere mafuta; itha kugwiritsidwa ntchito ngati sizing, calendering ndi thickening wothandizira pamakampani opanga nsalu;

Wothandizira pakupanga mapepala ndi matabwa;

Kubwezeretsanso zonyansa muzopangira zoyeretsera;

Flotation wothandizira kusankha mkuwa-nickel ndi potaziyamu ore;

Viscous kuyimitsidwa thickener ndi stabilizer pobowola mafuta ndi gasi zitsime;

gulu la glue kwa wallpaper;

zouma zomangira zosakaniza zigawo;

Zida za utoto wa latex, etc.

Hydroxypropyl methylcellulose (Hypromellose, Cellulose) imapangidwa ndi cellulose yoyera kwambiri ya thonje ngati zopangira, zomwe zimapangidwira mwapadera pansi pamikhalidwe yamchere, ndipo ilibe zinthu zogwira ntchito monga ziwalo za nyama ndi mafuta. Amasungunuka m'madzi ndi ma polar ambiri komanso oyenerera a ethanol / madzi, propanol / madzi, dichloroethane, ndi zina zotero, osasungunuka mu etha, acetone, ndi ethanol mtheradi, ndipo amafufuma kukhala njira yomveka bwino kapena ya turbid colloidal 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. Kusungunuka kumasiyanasiyana ndi kukhuthala. Kutsika mamasukidwe akayendedwe, m'pamenenso solubility kwambiri. Mafotokozedwe osiyanasiyana a HPMC ali ndi kusiyana kwina muzinthu zawo. Kusungunuka kwa HPMC m'madzi sikukhudzidwa ndi mtengo wa pH.