Polyanionic cellulose (PAC) bụ ihe na-emepụta cellulose emezigharịrị na kemịkalụ, nke bụ polysaccharide na-emekarị nke a na-ahụ na mgbidi cell nke osisi. A na-ejikarị PAC eme ihe n'ụlọ ọrụ dị iche iche, gụnyere ịkụ ala mmanụ, nhazi nri, ọgwụ, na ihe ịchọ mma, n'ihi njirimara kemịkalụ ya pụrụ iche. Ngwakọta kemịkalụ ya, nhazi ya na akụrụngwa ya na-eme ka ọ bụrụ mgbakwunye dị mkpa n'ọtụtụ ngwa.
Ọdịdị Cellulose:
Cellulose bụ polysaccharide linear nke mebere nkeji ugboro ugboro nke mkpụrụ ndụ β-D-glucose jikọtara site na β(1→4) njikọ glycosidic. Nkeji glucose ọ bụla nwere otu hydroxyl (-OH), nke dị oke mkpa maka mgbanwe kemịkalụ.
Mgbanwe kemịkalụ:
A na-emepụta cellulose polyanionic site na mgbanwe kemịkalụ nke cellulose. Usoro ngbanwe ahụ gụnyere iwebata otu anionic n'ime ọkpụkpụ azụ cellulose, na-enye ya ihe ụfọdụ. Ụzọ ndị a na-ejikarị emezi cellulose gụnyere etherification na mmeghachi omume esterification.
Otu Anionic:
Otu anionic agbakwunyere na cellulose n'oge mgbanwe na-enye ihe onwunwe polyanionic na polymer na-esi na ya pụta. Otu ndị a nwere ike ịgụnye carboxylate (-COO⁻), sulfate (-OSO₃⁻), ma ọ bụ phosphate (-OPO₃⁻) otu. Nhọrọ nke otu anionic na-adabere na ihe ndị a chọrọ na ngwa ngwa nke polyanionic cellulose.
Ngwakọta kemịkalụ nke PAC:
Ngwakọta kemịkalụ nke cellulose polyanionic dịgasị iche dabere na usoro njikọ akọwapụtara na ngwa a chọrọ. Otú ọ dị, n'ozuzu, PAC bụ isi nke ọkpụkpụ azụ cellulose nwere otu anionic jikọtara ya. Ogo nnọchi anya (DS), nke na-ezo aka na nkezi ọnụọgụ nke otu anionic kwa nkeji glucose, nwere ike ịdịgasị iche ma nwee mmetụta dị ukwuu na njirimara PAC.
Ọmụmaatụ Ọdịdị Kemịkalụ:
Ihe atụ nke usoro kemịkalụ nke polyanionic cellulose na otu carboxylate bụ ndị a:
Ọdịdị Cellulose Polyanionic
N'ime usoro a, okirikiri na-acha anụnụ anụnụ na-anọchi anya nkeji glucose nke ọkpụkpụ azụ cellulose, na okirikiri uhie na-anọchi anya otu carboxylate anionic (-COO⁻) jikọtara na ụfọdụ nkeji glucose.
Njirimara:
Polyanionic cellulose na-egosipụta ọtụtụ ihe a na-achọsi ike, gụnyere:
Mgbanwe nke Rheology: Ọ nwere ike ịchịkwa viscosity na mfu mmiri na ngwa dị iche iche, dị ka mmiri na-egwupụta mmiri na ụlọ ọrụ mmanụ.
Njide mmiri: PAC nwere ike ịmịnye ma jigide mmiri, na-eme ka ọ baa uru na ngwaahịa chọrọ njikwa mmiri, dị ka ngwaahịa nri ma ọ bụ usoro ọgwụ.
Nkwụsi ike: Ọ na-eme ka nkwụsi ike na ịrụ ọrụ dị iche iche dị iche iche site na igbochi nkewa nkewa ma ọ bụ nchịkọta.
Biocompatibility: N'ọtụtụ ngwa, PAC na-ejikọta ya na ọ dịghị egbu egbu, na-eme ka ọ dị mma maka iji ọgwụ na ngwaahịa nri.
Ngwa:
Polyanionic cellulose na-achọta ngwa na ụlọ ọrụ dị iche iche:
Mmiri na-egwupụta mmanụ: PAC bụ ihe mgbakwunye dị mkpa n'igwu apịtị iji chịkwaa viscosity, mfu mmiri na mgbochi shale.
Nhazi nri: A na-eji ya dị ka ihe na-agbapụta, stabilizer, ma ọ bụ onye na-ejigide mmiri na ngwaahịa nri dị ka sauces, uwe, na ihe ọṅụṅụ.
Pharmaceuticals: PAC na-eje ozi dị ka ihe nkedo, disintegrant, ma ọ bụ viscosity modifier n'ụdị mbadamba nkume, nkwusioru, na ude dị n'elu.
Ihe ịchọ mma: A na-eji ya na ngwaahịa nlekọta onwe onye dị ka ude, lotions, na shampoos iji nye njikwa viscosity na nkwụsi ike.
Imepụta:
Usoro mmepụta nke cellulose polyanionic gụnyere ọtụtụ usoro:
Ihe na-akpata cellulose: A na-enwetakarị cellulose site na osisi pulp ma ọ bụ akwa owu.
Mgbanwe kemịkalụ: Cellulose na-enweta etherification ma ọ bụ mmeghachi omume esterification iji webata otu anionic na nkeji glucose.
Nchacha: cellulose emezigharịrị dị ọcha iji wepụ adịghị ọcha na ngwaahịa.
ihicha na nkwakọ: A na-akpọnwụ polyanionic cellulose dị ọcha ma kpokọta ya maka ikesa na ụlọ ọrụ dị iche iche.
cellulose polyanionic bụ ihe ewepụtara n'ụdị cellulose nke nwere otu anionic jikọtara ya na ọkpụkpụ azụ cellulose. Ngwakọta kemịkalụ ya, gụnyere ụdị na njupụta nke otu anionic, na-ekpebi ihe onwunwe ya na dabara adaba maka ngwa dị iche iche na ụlọ ọrụ dị ka mkpọpu mmanụ, nhazi nri, ọgwụ na ihe ịchọ mma. Site na njikwa ziri ezi nke njikọ na nhazi ya, polyanionic cellulose na-aga n'ihu na-abụ ihe mgbakwunye dị mkpa n'ọtụtụ ngwaahịa na usoro n'ụwa nile.
Oge nzipu: Eprel-11-2024