Khemistri ea METHOCEL™ Cellulose Ethers

METHOCEL™ ke mofuta oa li-ether tsa cellulose tse hlahisoang ke Dow. Li-ether tsena tsa cellulose li tsoa ho cellulose, polymer ea tlhaho e fumanoang maboteng a sele ea limela. Khemistri ea METHOCEL™ e kenyelletsa phetoho ea cellulose ka liketso tsa etherification. Mefuta ea mantlha ea METHOCEL™ e kenyelletsa Hydroxypropyl Methylcellulose (HPMC) le Methylcellulose (MC), e 'ngoe le e 'ngoe e na le litšobotsi tse ikhethang tsa lik'hemik'hale. Mona ke kakaretso e akaretsang ea k'hemistri ea METHOCEL™:

1. Hydroxypropyl Methylcellulose (HPMC):

• Sebopeho:
  • HPMC ke ether ea cellulose e qhibilihang ka metsing e nang le lintho tse peli tsa bohlokoa tse nkeloang sebaka: lihlopha tsa hydroxypropyl (HP) le methyl (M).
  • Lihlopha tsa hydroxypropyl li hlahisa ts'ebetso ea hydrophilic, e leng se eketsang ho qhibiliha ha metsi.
  • Lihlopha tsa methyl li kenya letsoho ho qhibiliheng ka kakaretso 'me li susumetsa litšobotsi tsa polymer.
• Karabelo ea Etherification:
  • HPMC e hlahisoa ka ho etherification ea cellulose ka propylene oxide (bakeng sa lihlopha tsa hydroxypropyl) le methyl chloride (bakeng sa lihlopha tsa methyl).
  • Maemo a karabelo a laolwa ka hloko ho fihlella tekanyo e lakatsehang ya phetolo (DS) bakeng sa dihlopha tsa hydroxypropyl le methyl.
• Thepa:
  • HPMC e na le bokgoni bo botle ba ho qhibiliha ha metsi, e na le thepa ya ho etsa filimi, mme e ka fana ka tokollo e laolwang ditshebedisong tsa meriana.
  • Tekanyo ea ho nkeloa sebaka e susumetsa ho hlaka ha polymer, ho boloka metsi le litšobotsi tse ling.

2. Methylcellulose (MC):

• Sebopeho:
  • MC ke ether ea cellulose e nang le lintho tse nkeloang sebaka ke methyl.
  • E tšoana le HPMC empa ha e na lihlopha tsa hydroxypropyl.
• Karabelo ea Etherification:
  • MC e hlahisoa ka ho etherifying cellulose ka methyl chloride.
  • Maemo a karabelo a laolwa ho fihlella tekanyo e lakatsehang ya ho nkela sebaka.
• Thepa:
  • MC e qhibiliha metsing 'me e na le lits'ebetso indastering ea meriana, ea kaho le ea lijo.
  • E sebelisoa e le sethibela-khatello, sethibela-khatello le se tiisang.

3. Matlotlo a Tloaelehileng:

• Ho qhibiliha ha metsi: HPMC le MC ka bobeli lia qhibiliha metsing a batang, li etsa litharollo tse hlakileng.
• Ho Hlahisa Filimi: Li ka theha lifilimi tse tenyetsehang le tse kopaneng, e leng se etsang hore li be molemo lits'ebetsong tse fapaneng.
• Ho teteana: Li-ether tsa cellulose tsa METHOCEL™ li sebetsa e le li-thickeners tse sebetsang hantle, li susumetsa ho teteana ha litharollo.

4. Litšebeliso:

• Meriana: E sebelisoa ho pente ea matlapa, li-binder, le mekhoa ea ho lokolla e laoloang.
• Kaho: E sebelisoa ka li-mortar, likhomaretsi tsa lithaele le thepa e 'ngoe ea kaho.
• Lijo: Li sebelisoa e le lintho tse matlafatsang le tse matlafatsang lijong.
• Tlhokomelo ea Motho ka Mong: E ​​fumaneha litlolong, li-shampoo le linthong tse ling tsa tlhokomelo ea motho ka mong.

Khemik'hale ea li-ether tsa cellulose tsa METHOCEL™ li li etsa thepa e feto-fetohang ka mefuta e mengata ea lits'ebetso, e fanang ka taolo holim'a thepa ea rheological, ho boloka metsi, le litšobotsi tse ling tsa bohlokoa mefuteng e fapaneng. Thepa e itseng e ka etsoa ka ho fetola tekanyo ea phetolo le liparamente tse ling tsa tlhahiso.