Khemistri ea METHOCEL™ Cellulose Ethers

METHOCEL™ ke mofuta oa li-cellulose ethers tse hlahisoang ke Dow. Li-cellulose ethers tsena li tsoa ho cellulose, polima ea tlhaho e fumanehang maboteng a lisele tsa semela. Khemistri ea METHOCEL™ e kenyelletsa phetoho ea selulose ka karabelo ea etherification. Mefuta e ka sehloohong ea METHOCEL™ e kenyelletsa Hydroxypropyl Methylcellulose (HPMC) le Methylcellulose (MC), e 'ngoe le e' ngoe e na le litšobotsi tse itseng tsa lik'hemik'hale. Mona ke kakaretso ea kakaretso ea k'hemistri ea METHOCEL™:

1. Hydroxypropyl Methylcellulose (HPMC):

• Sebopeho:
  • HPMC ke cellulose ether e qhibilihang ka metsing e nang le likarolo tse peli tsa bohlokoa: hydroxypropyl (HP) le lihlopha tsa methyl (M).
  • Lihlopha tsa hydroxypropyl li hlahisa ts'ebetso ea hydrophilic, e matlafatsang ho qhibiliha ha metsi.
  • Lihlopha tsa methyl li kenya letsoho ho solubility ka kakaretso le ho susumetsa thepa ea polymer.
• Maikutlo a Etherification:
  • HPMC e hlahisoa ka etherification ea cellulose ka propylene oxide (bakeng sa lihlopha tsa hydroxypropyl) le methyl chloride (bakeng sa lihlopha tsa methyl).
  • Maemo a karabelo a laoloa ka hloko ho fihlela tekanyo e lakatsehang ea ho fetola (DS) bakeng sa lihlopha tsa hydroxypropyl le methyl.
• Thepa:
  • HPMC e bonts'a boleng bo botle ba ho qhibiliha ha metsi, thepa ea ho etsa lifilimi, 'me e ka fana ka tokollo e laoloang lits'ebetsong tsa meriana.
  • Tekanyo ea ho nkela sebaka e ama viscosity ea polymer, ho boloka metsi, le thepa e meng.

2. Methylcellulose (MC):

• Sebopeho:
  • MC ke cellulose ether e nang le li-substituent tsa methyl.
  • E tšoana le HPMC empa ha e na lihlopha tsa hydroxypropyl.
• Maikutlo a Etherification:
  • MC e hlahisoa ka etherifying cellulose ka methyl chloride.
  • Maemo a itšoara joang a laoloa ho finyella tekanyo e lakatsehang ea ho fetola.
• Thepa:
  • MC ha e qhibilihe ka metsing 'me e sebelisoa indastering ea meriana, ea kaho le ea lijo.
  • E sebelisoa e le binder, thickener, le stabilizer.

3. Thepa e Tloaelehileng:

• Ho qhibiliha ha Metsi: Ka bobeli HPMC le MC li qhibiliha metsing a batang, li etsa litharollo tse hlakileng.
• Tlhahiso ea Lifilimi: Li ka etsa lifilimi tse feto-fetohang le tse momahaneng, tsa etsa hore li be molemo lits'ebetsong tse fapaneng.
• Ho teteana: METHOCEL™ cellulose ethers e sebetsa joalo ka li-thickeners tse sebetsang hantle, tse susumetsang viscosity ea tharollo.

4. Likopo:

• Meriana ea Meriana: E sebelisoa ka har'a litlolo tsa letlapa, li-binders, le mekhoa e laoloang ea tokollo.
• Kaho: Ho hiroa ka seretse, likhomaretsi tsa lithaele le lisebelisoa tse ling tsa mohaho.
• Lijo: E sebelisoa e le li-thickeners le stabilizers lihlahisoa tsa lijo.
• Tlhokomelo ea Motho: E fumanoa ka litlolo, li-shampoo le lintho tse ling tsa tlhokomelo ea motho.

Khemistri ea METHOCEL™ cellulose ethers e li etsa lisebelisoa tse fapaneng tse nang le lits'ebetso tse fapaneng, tse fanang ka taolo holim'a thepa ea rheological, ho boloka metsi, le litšobotsi tse ling tsa bohlokoa mekhoeng e fapaneng. Thepa e khethehileng e ka hlophisoa ka ho fetola tekanyo ea ho fetola le likarolo tse ling tsa tlhahiso.