Sebopeho sa lik'hemik'hale sa li-derivatives tsa ether tsa cellulose

Li-ether tsa cellulose ke lintho tse tsoang ho cellulose, e leng polysaccharide ea tlhaho e fumanoang maboteng a sele ea limela. Sebopeho sa lik'hemik'hale sa li-ether tsa cellulose se khetholloa ka ho hlahisoa ha lihlopha tse fapaneng tsa ether ka phetoho ea lik'hemik'hale ea lihlopha tsa hydroxyl (-OH) tse teng molek'huleng ea cellulose. Mefuta e tloaelehileng haholo ea li-ether tsa cellulose e kenyelletsa:

1. Hydroxypropyl Methylcellulose (HPMC):
   • Sebopeho:
     • HPMC e hlahisoa ka ho kenya lihlopha tsa hydroxyl tsa cellulose sebakeng sa lihlopha tsa hydroxypropyl (-OCH2CHOHCH3) le methyl (-OCH3).
     • Tekanyo ea phetolo (DS) e bontša palo e tloaelehileng ea lihlopha tsa hydroxyl tse nkeloang sebaka ka yuniti ea glucose ka har'a ketane ea cellulose.
2. Selulose ea Carboxymethyl(CMC):
   • Sebopeho:
     • CMC e hlahisoa ka ho hlahisa lihlopha tsa carboxymethyl (-CH2COOH) ho lihlopha tsa hydroxyl tsa cellulose.
     • Lihlopha tsa carboxymethyl li fana ka ho qhibiliha ha metsi le mofuta oa anionic ho ketane ea cellulose.
3. Selulose ea Hydroxyethyl (HEC):
   • Sebopeho:
     • HEC e nkuwa ka ho nkela dihlopha tsa hydroxyethyl tsa cellulose sebaka ka dihlopha tsa hydroxyethyl (-OCH2CH2OH).
     • E bonts'a ho qhibiliha ha metsi le thepa ea ho teteana e ntlafetseng.
4. Selelulose ea Methyl (MC):
   • Sebopeho:
     • MC e hlahisoa ka ho hlahisa lihlopha tsa methyl (-OCH3) ho lihlopha tsa hydroxyl tsa cellulose.
     • E sebelisoa hangata ka lebaka la thepa ea eona ea ho boloka metsi le ho etsa filimi.
5. Selulose ea Ethyl (EC):
   • Sebopeho:
     • EC e hlahisoa ka ho kenya lihlopha tsa hydroxyl tsa cellulose sebakeng sa lihlopha tsa ethyl (-OC2H5).
     • E tsebahala ka ho se qhibilihe ha eona metsing 'me hangata e sebelisoa tlhahisong ea lipente le lifilimi.
6. Selulose ea Hydroxypropyl (HPC):
   • Sebopeho:
     • HPC e nkuwa ka ho hlahisa dihlopha tsa hydroxypropyl (-OCH2CHOHCH3) dihlopheng tsa hydroxyl tsa cellulose.
     • E sebelisoa e le sesebelisoa sa ho kopanya, ho kopanya filimi le ho fetola viscosity.

Sebopeho se ikgethang se fapana bakeng sa sehlahiswa se seng le se seng sa ether ya cellulose ho latela mofuta le tekanyo ya phetolo e hlahisitsweng nakong ya tshebetso ya phetoho ya dikhemikhale. Kenyelletso ya dihlopha tsena tsa ether e fana ka thepa e ikgethang ho ether e nngwe le e nngwe ya cellulose, e leng se etsang hore di lokele ditshebediso tse fapaneng tsa indasteri.