Cellulose Ethers ke eng, 'me ke hobane'ng ha e sebelisoa?

Li-cellulose ethers ke li-polymers tse qhibilihang ka metsing tse entsoeng ka selulose, e leng karolo ea mantlha ea limela. Ho na le mefuta e 'maloa ea li-cellulose ethers, e' ngoe le e 'ngoe e na le thepa e ikhethang e etsang hore e be e loketseng bakeng sa lits'ebetso tse fapaneng.

Likarolo tsa tekheniki tsa li-cellulose ethers li sebelisoa nthong e 'ngoe le e' ngoe ho tloha ho litlhare le litlolo ho isa ho tsa kaho le ho etsa masela. Ho phaella moo, li sebelisoa e le li-additives le li-thickeners ka lipente le liphahlo.

Mefuta ea li-cellulose ethers

Mefuta e meraro e tloaelehileng haholo ea li-cellulose ethers ke hydroxypropylmethylcellulose (HPMC), methylhydroxyethylcellulose (MHEC).

Ka lebaka la ho ikamahanya le maemo, HPMC ke mofuta o sebelisoang haholo oa cellulose ether. E fumaneha ka limaraka tse fapaneng ka boima bo fapaneng ba limolek'hule, likhato tsa substitution le viscosities. HPMC e ka sebelisoa ka tharollo ea acidic le alkaline ka bobeli, e etsa hore e be e loketseng bakeng sa lits'ebetso tse fapaneng.

MHEC e tšoana le HPMC empa e na le litaba tse tlase tsa hydroxypropyl. Ha ho bapisoa le HPMC, mocheso oa gelation oa MHEC hangata o phahame ho feta 80 ° C, ho itšetlehile ka litaba tsa sehlopha le mokhoa oa tlhahiso. MHEC e atisa ho sebelisoa e le thickener, binder, emulsion stabilizer kapa filimi ea pele.

Li-cellulose ethers li na le tšebeliso e ngata ka lebaka la thepa ea tsona e ikhethang. Litšebeliso tse ling tse tloaelehileng tsa cellulose ethers li kenyelletsa:

Li-thickeners: Li-cellulose ethers li ka sebelisoa e le lintho tse tenya bakeng sa mafura, likhomaretsi, lik'hemik'hale tsa sebakeng sa oli, lijo, litlolo le litlhare.

Li-binders: Li-cellulose ethers li ka sebelisoa e le li-binders matlapeng kapa li-granules. Ba ntlafatsa ho hatelloa ha li-powders ha ba ntse ba boloka thepa e ntle ea phallo.

Emulsion Stabilizers: Cellulose ethers e ka tsitsisa li-emulsions ka ho thibela ho kopana kapa ho phalla ha marotholi a mekhahlelo e qhalakaneng. Sena se etsa hore e be tse loketseng ho sebelisoa lipolymers tsa emulsion joalo ka lipente tsa latex kapa likhomaretsi.

Baetsi ba lifilimi: Li-cellulose ethers li ka sebelisoa ho etsa lifilimi kapa lirafshoa holim'a bokaholimo. Hangata li sebelisoa lits'ebetsong tsa kaho joalo ka lithaelese kapa li-adhesives tsa wallpaper. Lifilimi tse entsoeng ka cellulose ethers hangata li na le pepenene ebile lia tenyetseha, li na le ho hanyetsa mongobo hantle.