Hydroxyythythythythythythythythythythythythythythythythythythythythythythythythythythythythythythythythythythyth bụ polymer-solubles na-ejikarị gwuo egwu mmanụ, na-ewu, ọgwụ, ọgwụ na ụlọ ọrụ ndị ọzọ. Usoro mmepụta ya gụnyere mmeghachi omume dị mgbagwoju anya na njikwa usoro siri ike.
(1) Nkwadebe akụrụngwa
Ihe eji eme ihe nke hydroxyethythyth cellulose gunyere:
A na-eji cellulose: na-abụkarị ọcha akwa na-acha ọcha ma ọ bụ osisi pulp cellose, nke a na-ahazi iji wepu adịghị ọcha.
Etylene Oxide: Nke a bụ ihe bụ isi na-ebugharị na-ewebata ìgwè hydroxye ydroxyethyy.
Ihe ngwọta Alkali: na-abụkarị sodium hydroxide edozi, eji ya maka alkalization nke cellulose.
Ihe mgbaze Organic: dị ka ISoPopanol, nke a na-eji agbari cellose na ịkwalite mmeghachi omume.
(2) usoro usoro
Alkalization nke cellose:
Kwụsị cellose na sonvaic organic (dị ka Isropropanol) ma tinye sodium hydroxide ngwọta maka alkalization.
Na mmeghachi omume Alkalalization, njikọta hydrogen nke cellulose na-agbaji, na-eme ka Hydroxy divie na eriri akwara igwe na-adị mfe molecular.
A na-eme mmeghachi omume Alkalalization na ụfọdụ okpomọkụ (dịka 50-70 Celsius C) ma nọgide na-aga n'ihu na oge na-akpali akpali.
Mmeghachi omume gị:
A na-agbakwunye otlete oxide na-eji nke nta nke nta nke ọma na usoro cellulose cellulose.
Ethylene oxide reacts with the hydroxyl groups on cellulose to form hydroxyethyl cellulose.
Ọnọdụ mmeghachi omume na-abụkarị n'etiti 50-100 Celsius C, na mmeghachi omume dịgasị dabere na ngwaahịa a na-ahụ maka.
N'ọnọdụ a, ọnọdụ mmeghachi omume (dị ka okpomọkụ, oge, oge nke ethylene oxide, wdg) chọpụta ogo nke ihe eji sellopose.
Nnọpụ ya na ịsacha:
Mgbe mmeghachi omume ahụ agwụla, acid (dị ka hydrochloric acid) a na-agbakwunye hydrochloric acid) a na-asacha ngwaahịa dị ọcha dị ọcha iji wepu kemịkalụ kemịkal na-enweghị atụ.
A na-eji ịsacha mmiri mmiri, na mgbe ọtụtụ wachara, uru plọ uru nke ngwaahịa ahụ dị nso na ịnọpụ iche.
Ihe nzacha na ihicha:
A na-asacha hydroxyethythythyth cellose na-agabiga na nzacha iji wepu oke mmiri.
A na-akpọsa ngwaahịa a na-enyocha, na-abụkarị ịgba nkụ ma ọ bụ nkụ ikuku ma ọ bụ ihicha ikuku, iji belata ọkọlọtọ ya na ọkọlọtọ (dịka ihe na-erughị 5%).
Ngwaahịa akpọnwụwo dị na ntụ ntụ ma ọ bụ ezigbo granule dị mma.
Igwe na-echigharị na nyocha:
A na-eji celloxyethythythythythythythythythythythythythythythythythythythythythythythythythythythythythythythythythythythythythythythythythythythythythyth celhed iji nweta ogo urughuru.
A na-enyocha ngwaahịa a na-egbu egbu iji nweta ngwaahịa nke nha nke nha dị iche iche iji gboo mkpa nke mpaghara ngwa dị iche iche.
Nkwakọ ngwaahịa na ichekwa:
Ngwaahịa hydroxyethythythythythythythyth cellulose dị ka nkọwapụta si akọwa.
Ihe nkwakọ ngwaahịa na-abụkarị ihe na-adabere na akpa akwụkwọ rọba ma ọ bụ akpa akwụkwọ, gbakwunye akpa akpa ma ọ bụ katọn.
Na-echekwa na dị jụụ, akọrọ, ụlọ nkwakọba ihe iji gbochie mmiri ma ọ bụ mmebi ọkụ.
(3) Njikwa mma
Njikwa dị mma dị oke mkpa na usoro mmepụta nke hydroxyethythythythythythythythythythythyth cellulose. Ọ gụnyere akụkụ ndị a:
Njikwa ihe dị mma: Gbaa mbọ hụ na ịdị ọcha na ogo nke cellulose, ethlene oxide na ihe ndị ọzọ inyeaka na-emezu ihe ndị a chọrọ.
Njikwa nrụpụta: paramita igodo nke ọma dịka ọnọdụ, nrụgide, oge, pH uru, wdg iji hụ na mma ngwaahịa zuru oke.
Nnwale ngwaahịa a, Viewnerly nwalee akara ugo, viscosity, ịkpụkpụ, ịdị ọcha na ndị ọzọ na-egosi ngwaahịa ikpeazụ iji hụ na ọ na-ezute ihe ndị ahịa chọrọ.
(4) Nchedo gburugburu ebe obibi na nchekwa
Mmepụta hydroxyethythyth cellulose na-agụnye kemịkalụ dị ka ihe mgbaze na ihe otlene oxide. A ga-enwerịrị ihe nchebe na usoro nchekwa gburugburu ebe nchekwa n'oge usoro mmepụta:
Ọgwụ bụ ihe a na-emepụta: Istewater na-emepụta n'oge usoro mmepụta a ga-agwọta tupu iwepu mmetọ gburugburu ebe obibi.
Ọgwụ gas gas: Ethlene Oxide bụ ihe na-egbu egbu na ọkụ. A na-eme mmeghachi omume maka akụrụngwa dị ka akụrụngwa dị ka ụlọ elu ịmịcha iji belata mmetọ ikuku.
Nchedo nchekwa: Ndị ọrụ kwesịrị yie akụrụngwa nchebe iji zere ịkpọtụrụ kemịkal na-emerụ ahụ. N'otu oge ahụ, a ga-enwe ike ịnweta mmepụta, mgbochi mgbawa na ngwaọrụ nchekwa ndị ọzọ.
Usoro mmepụta nke hydroxyethythyth cellulose na-agụnye ọtụtụ mmeghachi omume kemịkal dị mgbagwoju anya na njikwa usoro ọkaibe. Site na nkwadebe ihe ubi iji mechaa nkwakọ ngwaahịa ngwaahịa, njikọ niile nwere mmetụta dị mkpa na arụmọrụ na ogo nke ngwaahịa ikpeazụ. Site na oganihu nke teknụzụ na oganihu nke ihe nchebe gburugburu ebe obibi gburugburu ebe obibi na-aga n'ihu na-aga n'ihu iji melite ogo ngwaahịa, belata ọnụ ahịa ma belata mmetụta gburugburu ebe obibi.
Oge post: Feb-17-2025