Ukwakheka kwamakhemikhali ze-cellulose ether derivatives

I-Cellulose I-Teshers iyi-decivatives of cellulose, i-polysaccharide yemvelo etholakala ezindongeni zeseli zezitshalo. Ukwakheka kwamakhemikhali ze-cellulose afers kubonakaliswa ukwethulwa kwamaqembu ahlukahlukene ether ngokusebenzisa ukuguqulwa kwamakhemikhali kwamaqembu ama-hydroxyl (-oh) akhona ku-molecule ye-cellulose. Izinhlobo ezivame kakhulu ze-cellulose afers zifaka:

1. I-Hydroxypropyl methylcellulose (HPMC):
   • Isakhiwo:
     • I-HPMC ihlelwe ngokufaka esikhundleni amaqembu e-hydroxyl apulazilikazi nge-hydroxypropyllopyllopyllopyllopyllopylyl (-Och2chohchch3) ne-methyl (-Och3).
     • Izinga lokufaka esikhundleni (DS) libonisa inani eliphakathi lamaqembu afakwa esikhundleni se-hydroxyl uphiko lwe-glucose ku-cellulose chain.
2. Carboxymethyl cellulose(CMC):
   • Isakhiwo:
     • I-CMC ikhiqizwa ngokwazisa amaqembu we-carboxymethyl (-ch2cooh) emaqenjini ama-hydroxyl.
     • Amaqembu e-carboxymethyl adlulisela i-solubity yamanzi kanye nomlingiswa we-anionic ku-cellulose chain.
3. I-Hydroxyyethyl cellulose (HEC):
   • Isakhiwo:
     • I-HEC itholakala ngokufaka esikhundleni amaqembu ama-hydroxyl a-cellulose ane-hydroxyethyl (-Och2chch.coh).
     • Kukhonjiswa ama-solubility athuthukisiwe kanye nezakhiwo ezinkulu.
4. Methyl cellulose (MC):
   • Isakhiwo:
     • I-MC ikhiqizwa ngethula amaqembu we-methyl (-Och3) emaqenjini ama-hydroxyl we-cellulose.
     • Kuvame ukusetshenziselwa ukugcinwa kwayo kwamanzi kanye nezakhiwo ezenziwe ngefilimu.
5. I-Ethyl Cellulose (EC):
   • Isakhiwo:
     • I-EC ihlelwe ngokufaka esikhundleni amaqembu we-hydroxy.
     • Kuyaziwa ngokungenayo kokungafakwa emanzini futhi kuvame ukusetshenziswa ekukhiqizweni kwezimbozo namafilimu.
6. I-Hydroxypropylllose (HPC):
   • Isakhiwo:
     • I-HPC ithathwe ngokungenisa ama-hydroxyproppropyll (-Och2chohchch3) amaqembu amaqembu ama-hydroxyl of cellulose.
     • Isetshenziswa njenge-binder, ifilimu yangaphambili yefilimu, kanye ne-viscosity modifier.

Isakhiwo esithile siyahlukahluka ngakunye okususelwa kuhlobo kanye degree of inqumetha owethulwe ngesikhathi senqubo yokuguqulwa kwamakhemikhali. Ukwethulwa kwalawa maqembu e-ether kunikeza izakhiwo ezithile kwi-ether ngayinye ye-cellulose, kubenza balungele izinhlelo ezahlukahlukene zezimboni.