Cellulose ether bụ okwu n'ozuzu maka usoro ngwaahịa na-emepụta site na mmeghachi omume nke cellulose alkali na etherifying n'okpuru ọnọdụ ụfọdụ.Alkali cellulose na-anọchi anya dị iche iche etherifying elekọta mmadụ iji nweta dị iche ichecellulose ethers.Dị ka ionization Njirimara nke ndị nnọchi, cellulose ethers nwere ike kewaa ụzọ abụọ: ionic (dị ka carboxymethyl cellulose) na-abụghị ionic (dị ka methyl cellulose).Dị ka ụdị nke nnọchi, cellulose ether nwere ike kewaa monoether (dị ka methyl cellulose) na ngwakọta ether (dị ka hydroxypropyl methyl cellulose).Dị ka dị iche iche solubility, ọ nwere ike kewara n'ime mmiri-soluble (dị ka hydroxyethyl cellulose) na organic mgbaze-soluble (dị ka ethyl cellulose), wdg Dry-agwakọta ngwa agha bụ tumadi mmiri-soluble cellulose, na mmiri-soluble cellulose bụ. kewara n'ime ụdị ngwa ngwa na elu ọgwụgwọ na-egbu oge ụdị mgbasa.
Mgbe ether cellulose dị na ngwa agha gbazere na mmiri, a na-eme ka nkesa dị irè na nke dị iche iche nke cimentious ihe dị na usoro ahụ n'ihi ọrụ elu, na ether cellulose, dị ka colloid nchebe, "na-ekpuchi" ihe ndị siri ike na mkpuchi. ha n'elu elu.Mepụta ihe nkiri na-agba mmanụ, mee ka usoro ngwa agha kwụsie ike, ma na-emeziwanye mmiri nke ngwa agha n'oge usoro ngwakọta na ire ụtọ nke ihe owuwu ahụ.
N'ihi usoro ihe omimi nke ya, ihe ngwọta cellulose ether na-eme ka mmiri dị na ngwa ngwa ghara ịdị mfe, ma jiri nwayọọ nwayọọ hapụ ya ogologo oge, na-enye ngwa agha ahụ nke ọma njide mmiri na ịrụ ọrụ.
Ngwa ngwa ciment ala na-eme ka onwe ya, nke nwere obere viscosity hydroxypropyl methylcellulose ether.Ebe ọ bụ na ndị na-arụ ọrụ na-arụ ọrụ na-eji obere aka na-eme ka ala ahụ dum dị larịị, ma e jiri ya tụnyere usoro ịmegharị akwụkwọ ntuziaka gara aga, a na-eme ka ịdị larịị na ọsọ ụlọ dị mma.Oge ịgwakọta nkụ na-edozi onwe ya na-eji ohere dị mma na-ejigide mmiri nke hydroxypropyl methylcellulose.Ebe ọ bụ na nhazi onwe onye na-achọ ka ngwa agha ahụ na-akpali akpali nwere ike ịdaba na ala na-akpaghị aka, ihe mmiri ahụ dị ntakịrị.Mgbe agbakwunyere hpmc, ọ ga-achịkwa ala Njide mmiri nke elu ahụ adịghị anya, nke na-eme ka ike dị elu dị elu mgbe ọ nwụsịrị, na nkwụsịtụ dị ntakịrị, nke na-ebelata mgbawa.Mgbakwunye nke HPMC na-enyekwa viscosity, nke a pụrụ iji mee ihe dị ka ihe enyemaka mgbochi sedimentation, kwalite fluidity na pumpability, ma melite arụmọrụ nke ịkwanye ala.
Ezigbo cellulose ether nwere ọnọdụ anya na-adịghị mma na obere njupụta buru ibu;HPMC dị ọcha nwere ezigbo ọcha, ihe ndị a na-eji na-emepụta ihe dị ọcha, mmeghachi omume na-eme nke ọma na enweghị adịghị ọcha, ngwọta mmiri na-edozi ahụ doro anya, nnyefe ọkụ dị elu, ọ dịghịkwa amonia, starch na alcohols.Ire, fibrous n'okpuru mikroskopu ma ọ bụ nnukwu iko.
Oge nzipu: Dec-06-2022