Ubume bemichiza yeederivatives ze-cellulose ether

I-cellulose ethers iphuma kwi-cellulose, i-polysaccharide yendalo efumaneka kwiindonga zeeseli zezityalo. Ukwakhiwa kweekhemikhali ze-cellulose ethers zibonakaliswa ngokungeniswa kwamaqela ahlukeneyo ether ngokuguqulwa kweekhemikhali zamaqela e-hydroxyl (-OH) akhoyo kwi-molecule ye-cellulose. Iindidi eziqhelekileyo ze-cellulose ethers ziquka:

1. IHydroxypropyl Methylcellulose (HPMC):
   • Ulwakhiwo:
     • I-HPMC idityaniswe ngokutshintsha amaqela e-hydroxyl e-cellulose kunye ne-hydroxypropyl (-OCH2CHOHCH3) kunye namaqela e-methyl (-OCH3).
     • Iqondo lokuthatha indawo (DS) libonisa umndilili wenani lamaqela e-hydroxyl endaweni nganye kwiyunithi yeglucose kwitsheyini yeseli.
2. Carboxymethyl Cellulose(CMC):
   • Ulwakhiwo:
     • I-CMC iveliswa ngokuzisa amaqela e-carboxymethyl (-CH2COOH) kumaqela e-hydroxyl ye-cellulose.
     • Amaqela e-carboxymethyl anika ukunyibilika kwamanzi kunye nomlingiswa we-anionic kwikhonkco le-cellulose.
3. I-Hydroxyethyl Cellulose (HEC):
   • Ulwakhiwo:
     • I-HEC ithathwa ngokutshintsha amaqela e-hydroxyl ye-cellulose kunye namaqela e-hydroxyethyl (-OCH2CH2OH).
     • Ibonisa ukunyibilika kwamanzi okuphuculweyo kunye neempawu zokujiya.
4. I-Methyl Cellulose (MC):
   • Ulwakhiwo:
     • I-MC iveliswa ngokuzisa amaqela e-methyl (-OCH3) kumaqela e-hydroxyl ye-cellulose.
     • Ngokuqhelekileyo isetyenziselwa ukugcinwa kwamanzi kunye neepropati zokwenza ifilimu.
5. I-Ethyl Cellulose (EC):
   • Ulwakhiwo:
     • I-EC yenziwe ngokutshintsha amaqela e-hydroxyl e-cellulose kunye namaqela e-ethyl (-OC2H5).
     • Iyaziwa ngokunganyibiliki kwayo emanzini kwaye ihlala isetyenziselwa ukuveliswa kweengubo kunye neefilimu.
6. ISelulosi yeHydroxypropyl (HPC):
   • Ulwakhiwo:
     • I-HPC ifumaneka ngokuzisa amaqela e-hydroxypropyl (-OCH2CHOHCH3) kumaqela e-hydroxyl ye-cellulose.
     • Isetyenziswa njenge-binder, ifilimu yangaphambili, kunye ne-viscosity modifier.

Ulwakhiwo oluthile luyahluka kwi-derivative ye-ether ye-cellulose nganye ngokusekelwe kuhlobo kunye neqondo lokutshintshwa okungeniswa ngexesha lenkqubo yokuguqulwa kweekhemikhali. Ukuqaliswa kwala maqela e-ether kunika iipropati ezithile kwi-ether ye-cellulose nganye, ezenza ukuba zilungele ukusetyenziswa kwezoshishino ezahlukeneyo.