Polyanionic cellulose (PAC) ndi sodium carboxymethyl cellulose (CMC) ndi mitundu iwiri ya ma cellulose ethers omwe ali ndi mawonekedwe amankhwala ofanana ndi katundu, koma amasiyana muzinthu zina zazikulu.

PAC ndi madzi osungunuka a cellulose ether omwe ali ndi mlingo waukulu wolowa m'malo, kutanthauza kuti magulu ambiri a carboxymethyl amamangiriridwa pamsana wa cellulose. PAC imagwiritsidwa ntchito ngati viscosifier komanso chochepetsera kutaya madzimadzi m'madzi akubowola mafuta chifukwa chakusunga bwino madzi, kukhazikika, komanso kukhuthala kwake.

CMC, Komano, ndi madzi sungunuka mapadi efa kuti chimagwiritsidwa ntchito monga thickener, binder, ndi stabilizer m'mafakitale osiyanasiyana, kuphatikizapo chakudya, mankhwala, zodzoladzola, ndi kupanga mapepala. CMC imapangidwa ndi zomwe cellulose ndi monochloroacetic acid imayambitsa magulu a carboxymethyl mumsana wa cellulose. Mlingo wolowa m'malo wa CMC ndiwotsika kuposa wa PAC, komabe umaperekabe madzi abwino, kukhazikika, komanso kukhuthala.

Ngakhale PAC ndi CMC onse ndi ma cellulose ether okhala ndi zinthu zofanana, amasiyana muzinthu zina zazikulu. Mwachitsanzo, PAC imagwiritsidwa ntchito pobowola mafuta chifukwa cha kuchuluka kwake m'malo komanso kuchepetsa kutayika kwamadzimadzi, pomwe CMC imagwiritsidwa ntchito m'mafakitale ambiri chifukwa chakuchepa kwake m'malo mwake komanso kusinthasintha pazinthu zosiyanasiyana.

Ponseponse, PAC ndi CMC onse ndi ma ether ofunikira a cellulose omwe ali ndi katundu ndi ntchito zapadera. Ngakhale PAC imagwiritsidwa ntchito kwambiri pobowola mafuta, CMC ili ndi ntchito zambiri m'mafakitale osiyanasiyana chifukwa cha kusinthasintha kwake komanso kutsika kwake m'malo.