Usoro mmepụta nke sodium carboxymethylcellulose

Usoro mmepụta nke sodium carboxymethylcellulose (CMC) gụnyere ọtụtụ usoro, gụnyere nkwadebe nke cellulose, etherification, ịdị ọcha, na ihicha. Nke a bụ nkọwapụta nke usoro nrụpụta a na-ahụkarị:

1. Nkwadebe nke Cellulose: Usoro a na-amalite site na nkwadebe nke cellulose, nke a na-esi na pulp osisi ma ọ bụ akwa owu. A na-ebu ụzọ mee ka cellulose dị ọcha ma nụchaa ya iji wepụ adịghị ọcha dị ka lignin, hemicellulose, na ihe ndị ọzọ na-emerụ ahụ. cellulose a dị ọcha na-eje ozi dị ka ihe mmalite maka mmepụta nke CMC.
2. Alkalization: A na-emeso cellulose dị ọcha na ngwọta alkaline, na-abụkarị sodium hydroxide (NaOH), iji mee ka mmeghachi omume ya dịkwuo mma ma kwado mmeghachi omume etherification na-esote. Alkalization na-enyekwa aka na-aza ma meghee eriri cellulose, na-eme ka ha nwee ike ịnweta mgbanwe kemịkalụ.
3. Mmeghachi omume Etherification: A na-emeghachi cellulose alkalized na monochloroacetic acid (MCA) ma ọ bụ nnu sodium ya, sodium monochloroacetate (SMCA), n'ihu onye na-eme ihe n'okpuru ọnọdụ a na-achịkwa. Mmeghachi omume etherification a gụnyere ngbanwe nke otu hydroxyl na agbụ cellulose na otu carboxymethyl (-CH2COONa). Ogo nke nnọchi (DS), nke na-anọchi anya ọnụ ọgụgụ nke carboxymethyl otu n'otu glucose nke agbụ cellulose, enwere ike ịchịkwa ya site n'ịgbanwe usoro mmeghachi omume dị ka okpomọkụ, oge mmeghachi omume, na mkpokọta mmeghachi omume.
4. Neutralization: Mgbe mmeghachi omume etherification gasịrị, a na-ewepụ ngwaahịa ahụ iji gbanwee otu acidic ọ bụla fọdụrụ na ụdị nnu sodium ha (carboxymethylcellulose sodium). A na-enweta nke a site n'ịgbakwunye ngwọta alkaline, dị ka sodium hydroxide (NaOH), na ngwakọta mmeghachi omume. Neutralization na-enyekwa aka imezi pH nke ngwọta ma mee ka ngwaahịa CMC guzosie ike.
5. Nchacha: A na-asachapụ sodium carboxymethylcellulose crude ka ọ wepụ ihe adịghị ọcha, reagents na-emeghị eme, na ngwaahịa sitere na ngwakọta mmeghachi omume. Ụzọ nchacha nwere ike ịgụnye ịsa, filtration, centrifugation, na ihicha. A na-eji mmiri na-asachapụ CMC dị ọcha iji wepụ alkali na nnu fọdụrụnụ, na-esote filtration ma ọ bụ centrifugation iji kewaa ngwaahịa CMC siri ike na usoro mmiri mmiri.
6. ihicha: A na-emecha kpọchaa sodium carboxymethylcellulose dị ọcha iji wepụ oke mmiri ma nweta ọdịnaya mmiri achọrọ maka nchekwa na nhazi ọzọ. Ụzọ ihicha nwere ike ịgụnye ihicha ikuku, ihicha ịgba, ma ọ bụ ihicha drum, dabere na njirimara ngwaahịa achọrọ na ọnụ ọgụgụ nrụpụta.

Ngwaahịa sodium carboxymethylcellulose na-esi na ya pụta bụ ihe na-acha ọcha na-acha ọcha na-acha ọcha ma ọ bụ ihe granular nwere ezigbo mmiri solubility na akụrụngwa rheological. A na-eji ya eme ihe dị ka onye na-eme mkpọtụ, stabilizer, binder, and rheology modifier na ụlọ ọrụ dị iche iche, gụnyere nri, ọgwụ, ihe ịchọ mma, textiles na ngwa ụlọ ọrụ.