Ịmepụta ether cellulose dị ọcha gụnyere usoro dị iche iche, malite na mmịpụta nke cellulose site na ihe ọkụkụ na usoro mgbanwe kemịkalụ.
Cellulose Sourcing: Cellulose, a polysaccharide nke dị na mgbidi cell nke osisi, na-eje ozi dị ka akụrụngwa maka cellulose ethers. Ebe ndị a na-ahụkarị gụnyere pulp osisi, owu, na osisi fibrous ndị ọzọ dị ka jute ma ọ bụ hemp.
Pulping: Pulping bụ usoro nkewapụ eriri cellulose na ihe ọkụkụ. A na-enwetakarị nke a site na igwe ma ọ bụ kemịkalụ. Ngwunye igwe na-arụ ọrụ na-agụnye ịkwanye ma ọ bụ nụchaa ihe iji kewaa eriri, ebe kemịkalụ pulping, dị ka usoro kraft, na-eji kemịkalụ dị ka sodium hydroxide na sodium sulfide gbazee lignin na hemicellulose, na-ahapụ cellulose n'azụ.
Bleaching (Nhọrọ): Ọ bụrụ na achọrọ ịdị ọcha dị elu, pulp cellulose nwere ike ime usoro ịcha ọcha iji wepụ lignin ọ bụla fọdụrụnụ, hemicellulose, na adịghị ọcha ndị ọzọ. Chlorine dioxide, hydrogen peroxide, ma ọ bụ oxygen bụ ihe ndị na-acha ọcha ọcha na-ejikarị eme ihe na nzọụkwụ a.
Nkwalite: A na-akwadokarị ethers cellulose site na imeghachi cellulose na alkali metal hydroxides iji mepụta etiti cellulose alkali. Nzọụkwụ a na-agụnye ịgbasa eriri cellulose na ngwọta nke sodium hydroxide ma ọ bụ potassium hydroxide na okpomọkụ dị elu. Nzọụkwụ a na-arụ ọrụ na-eme ka cellulose na-emeghachi omume maka etherification.
Etherification: Etherification bụ isi nzọụkwụ n'imepụta cellulose ethers. Ọ na-agụnye iwebata otu ether (dị ka methyl, ethyl, hydroxyethyl, ma ọ bụ hydroxypropyl otu) n'ime ọkpụkpụ azụ cellulose. A na-eme mmeghachi omume a site n'ịgwọ alkali cellulose na ihe ndị na-eme ka ahụ dị ka alkyl halides (dịka, methyl chloride maka methyl cellulose), alkylene oxides (dịka ethylene oxide maka hydroxyethyl cellulose), ma ọ bụ alkyl halohydrins (dịka, propylene oxide maka hydroxypropyl cellulose). ) n'okpuru ọnọdụ a na-achịkwa nke okpomọkụ, nrụgide, na pH.
Neutralization na ịsacha: Mgbe etherification gasịrị, a na-ewepụ ngwakọta mmeghachi omume iji wepụ alkali gafere. A na-emekarị nke a site n'ịgbakwunye acid, dị ka hydrochloric acid ma ọ bụ sulfuric acid, iji wepụ alkali ma mee ka ether cellulose pụta. A na-eji mmiri na-asachapụ ngwaahịa a rụpụtara iji wepụ kemịkalụ na ihe ndị ọzọ fọdụrụnụ.
ihicha: A na-akpọcha ngwaahịa ether cellulose a na-asachapụ iji wepụ oke mmiri wee nweta ụdị ntụ ntụ ma ọ bụ granular ikpeazụ. Enwere ike ime nke a site na iji usoro dị ka ihicha ikuku, ihicha oghere, ma ọ bụ ihicha mmiri.
Njikwa ogo: Usoro njikwa mma dị mkpa iji hụ na ịdị ọcha, nkwụsi ike, na ihe ndị achọrọ nke cellulose ethers. Nke a gụnyere ịnwale ngwaahịa ahụ maka oke dị ka ogo nke nnọchi, viscosity, nkesa nha nha, ọdịnaya mmiri na ịdị ọcha site na iji usoro nyocha dị ka titration, viscometry, na spectroscopy.
Nkwakọ ngwaahịa na Nchekwa: Ozugbo ethers cellulose akpọnwụwo ma nwalee ịdị mma, a na-etinye ha n'ime arịa ndị kwesịrị ekwesị ma chekwaa n'okpuru ọnọdụ a na-achịkwa iji gbochie ịmịnye mmiri na mmebi. Ịkpọ aha nke ọma na akwụkwọ nke nkọwa batch dịkwa mkpa maka nchọta na nrube isi n'usoro.
Site n'ịgbaso usoro ndị a, ọ ga-ekwe omume ịmepụta cellulose ethers dị ọcha nwere ihe ndị a chọrọ maka ngwa ụlọ ọrụ dị iche iche, gụnyere ọgwụ, nri, ihe ịchọ mma, textiles, na ihe owuwu ụlọ.
Oge nzipu: Eprel-24-2024