Hydroxypropyly Methylcelulolose e tsoa kae?

Hydroxypropyly Methylcelulolose e tsoa kae?

 

Hydroxypropypropypropypropypropypropypropiny, e boetse e tsejoa ke lebitso la khoebo hypromellose, na le mokoetlisi ea nang le moea o tsoang clllulose ea tlhaho. Mohloli oa mantlha oa cellulose bakeng sa tlhahiso ea HPMC ke tloaelo ea patsi kapa k'hothone. Mokhoa oa ho etsa hangata o fetola cellulose ka li-hydroxypropyL le lihlopha tsa methyl.

Tlhahiso ea hpmc e kenyelletsa mehato e mengata:

  1. Cellulose Exntion:
    • Qhobosheane e fumaneha ho tsoa mehloling ea semela, haholo-holo li-pulp tsa ka holo kapa k'hothone. Cliloulose e ntšoa le ho hloekisoa ho theha makhasi a cellulose.
  2. Alkalization:
    • Thaba ea cellulose e phekoloa ka tharollo ea alkaline, hangata sodium hydroxide (Naoh), ho kenya lihlomo tsa hydroyl ka ketane ea selefouno.
  3. Phapanyetsano:
    • Etherization ke mohato oa bohlokoa tlhahisong ea HPMC. Nomoro ea alkalid ea alkalid e sebelisoa hape ka pokello ea khomo
  4. Ho se nke lehlakore le ho hlatsoa:
    • Ho ile ha mo fetoloa sejo se fetotsoeng, eo hona joale e seng hydroxypropyproppyl methyl methyl cellulolose, e fetisetsang ts'ebetso ea ho se nke lehlakore ea ho tlosa alkali efe kapa efe. Ebe e hlatsuoa ka botlalo ho felisa litšila le lihlahisoa.
  5. Ho omella le ho omella:
    • Nomoro e fetotsoeng ea selefouno e omisitsoe ho tlosa mongobo o feteletseng 'me o entsoe ka phofo e ntle. Boholo ba tsona bo ka laoloa ho latela kopo e reriloeng.

Sehlahisoa sa HPMC se hlahisitsoeng ke phofo e tšoeu kapa e tšoeu e nang le likhahla tse fapaneng tsa hydroxypropyL le methyl. Matloana a ikhethang a HPMC, a kang alloe, a sheba le litšobotsi tse ling tsa ts'ebetso, a itšetleha ka tekanyo ea sebaka le ts'ebetso ea ho etsa.

Ho bohlokoa ho tseba hore HPMC ke polymer ea tlhaho, 'me ha e nkoa e le litheolelo tsa tlhaho tsa lik'hemik'hale ho fihlela thepa e fapaneng ea liindasteri tsa indasteri.


Nako ea poso: Jan-01-2024