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 itseng se fapana bakeng sa derivative e 'ngoe le e 'ngoe ea ether ea cellulose ho latela mofuta le tekanyo ea phetolo e hlahisitsoeng nakong ea ts'ebetso ea phetoho ea lik'hemik'hale. Kenyelletso ea lihlopha tsena tsa ether e fana ka thepa e itseng ho ether e 'ngoe le e 'ngoe ea cellulose, e leng se etsang hore li lokele lits'ebetso tse fapaneng tsa indasteri.