Carboxymethyl cellulose (CMC) bụ ihe na-emepụta cellulose na-agbaze mmiri nke a na-ejikarị eme ihe n'ọtụtụ ụlọ ọrụ, gụnyere nri, ọgwụ na nlekọta onwe onye. Ogo nke nnọchi (DS) bụ oke dị mkpa na-emetụta akụrụngwa nke CMC. N'isiokwu a, anyị ga-atụle mmetụta DS na àgwà carboxymethyl cellulose.
Nke mbụ, ọ dị mkpa ịghọta ihe ogo ngbanwe bụ. Ogo nke nnọchi na-ezo aka ọnụ ọgụgụ nke carboxymethyl otu otu glucose n'ime agbụ cellulose. A na-emepụta CMC site na imeghachi cellulose na sodium monochloroacetate na sodium hydroxide. N'oge mmeghachi omume a, a na-eji otu carboxymethyl dochie otu hydroxyl na agbụ cellulose. Enwere ike ịchịkwa ogo ngbanwe site n'ịgbanwe ọnọdụ mmeghachi omume, dị ka ntinye nke sodium hydroxide na sodium monochloroacetate, oge mmeghachi omume, na okpomọkụ.
DS nke CMC na-emetụta njirimara anụ ahụ na kemịkal ya, dị ka solubility ya, viscosity, na nkwụsi ike ọkụ. CMC nwere DS dị ala nwere ogo dị elu nke crystallinity na ọ bụ obere mmiri-soluble karịa CMC nwere nnukwu DS. Nke a bụ n'ihi na otu carboxymethyl dị na CMC nwere DS dị ala dị n'elu agbụ cellulose, nke na-ebelata mmiri-solution. N'ụzọ dị iche, CMC nwere DS dị elu nwere usoro amorphous ma na-edozi mmiri karịa CMC nwere DS dị ala.
DS na-emetụtakwa viscosity nke CMC. CMC nwere DS dị ala nwere viscosity dị ala karịa CMC nwere DS dị elu. Nke a bụ n'ihi na ndị otu carboxymethyl dị na CMC nwere DS dị ala na-ekewa n'ihu, nke na-ebelata mmekọrịta dị n'etiti ụdọ cellulose ma na-ebelata viscosity. N'ụzọ dị iche, CMC nwere DS dị elu nwere viscosity dị elu n'ihi na otu carboxymethyl dị nso, nke na-eme ka mmekọrịta dị n'etiti ụdọ cellulose na-ebuli viscosity.
Na mgbakwunye na akụrụngwa anụ ahụ ya, DS nke CMC na-emetụtakwa akụrụngwa kemịkal ya. CMC nwere DS dị ala anaghị akwụsi ike na oke okpomọkụ yana ụkpụrụ pH karịa CMC nwere DS dị elu. Nke a bụ n'ihi na otu carboxymethyl dị na CMC nwere DS dị ala na-enwekarị ike ịnweta hydrolysis ma nwee ike daa n'okpuru ọnọdụ siri ike. N'ụzọ dị iche, CMC nwere DS dị elu kwụsiri ike na oke okpomọkụ yana ụkpụrụ pH n'ihi na otu carboxymethyl na-ejikọta ya na agbụ cellulose.
Oge nzipu: Mar-10-2023