Sebopeho sa lik'hemik'hale sa lihlahisoa tsa cellulose ether

Li-cellulose ethers li tsoa ho cellulose, polysaccharide ea tlhaho e fumanehang maboteng a lisele tsa limela. Sebopeho sa lik'hemik'hale tsa li-cellulose ethers li khetholloa ka ho kenngoa ha lihlopha tse sa tšoaneng tsa ether ka phetoho ea lik'hemik'hale tsa lihlopha tsa hydroxyl (-OH) tse teng ka molek'hule ea cellulose. Mefuta e atileng haholo ea li-cellulose ethers e kenyelletsa:

1. Hydroxypropyl Methylcellulose (HPMC):
   • Sebopeho:
     • HPMC e entsoe ka ho kenya lihlopha tsa hydroxyl tsa selulose ka lihlopha tse peli tsa hydroxypropyl (-OCH2CHOHCH3) le methyl (-OCH3).
     • The degree of substitution (DS) e bontša palo-hare ea palo ea lihlopha tsa hydroxyl tse nketsoeng sebaka ka yuniti ea tsoekere ka har'a ketane ea selulose.
2. Carboxymethyl cellulose(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 sebopeho sa anionic ho ketane ea cellulose.
3. Hydroxyethyl Cellulose (HEC):
   • Sebopeho:
     • HEC e tsoa ka ho kenya lihlopha tsa hydroxyl tsa selulose ka lihlopha tsa hydroxyethyl (-OCH2CH2OH).
     • E bonts'a boleng bo ntlafalitsoeng ba ho qhibiliha ha metsi le thepa e teteaneng.
4. Methyl Cellulose (MC):
   • Sebopeho:
     • MC e hlahisoa ka ho hlahisa lihlopha tsa methyl (-OCH3) ho lihlopha tsa hydroxyl tsa selulose.
     • Hangata e sebelisoa bakeng sa ho boloka metsi le thepa ea ho etsa lifilimi.
5. Ethyl Cellulose (EC):
   • Sebopeho:
     • EC e entsoe ka ho kenya lihlopha tsa hydroxyl tsa selulose ka lihlopha tsa ethyl (-OC2H5).
     • E tsebahala ka ho insolubility ha eona metsing 'me e atisa ho sebelisoa ha ho etsoa liphahlo le lifilimi.
6. Hydroxypropyl Cellulose (HPC):
   • Sebopeho:
     • HPC e tsoa ka ho hlahisa lihlopha tsa hydroxypropyl (-OCH2CHOHCH3) ho lihlopha tsa hydroxyl tsa cellulose.
     • E sebelisoa e le binder, filimi ea pele, le mofetoleli oa viscosity.

Sebopeho se ikhethileng se fapana bakeng sa motsoako o mong le o mong oa cellulose ether ho latela mofuta le tekanyo ea ho kenya sebaka se hlahisitsoeng nakong ea ts'ebetso ea phetoho ea lik'hemik'hale. Kenyelletso ea lihlopha tsena tsa ether e fana ka thepa e khethehileng ho ether e 'ngoe le e' ngoe ea cellulose, e etsang hore e tšoanelehe bakeng sa lits'ebetso tse fapaneng tsa indasteri.