Carboxymethyl cellulose (sodium carboxyme thyl cellulose, CMC) bụ a carboxymethylated ewepụtara cellulose, makwaara dị ka cellulose gum, na kasị mkpa ionic cellulose gum.
CMC na-abụkarị ogige polymer anionic nke a kwadebere site na ime cellulose eke sitere na caustic alkali na monochloroacetic acid.Ibu arọ nke molekụla nke ogige ahụ dịgasị site na ọtụtụ puku ruo otu nde.
CMC bụ nke mgbanwe nke cellulose eke, na Food and Agriculture Organisation nke United Nations (FAO) na World Health Organisation (WHO) na eze na-akpọ ya "modified cellulose".Ọ bụ German E. Jansen chepụtara usoro njikọ nke sodium carboxymethyl cellulose na 1918, e mekwara ya patent na 1921 wee bụrụ ndị ụwa mara ya, wee na-ere ahịa ya na Europe.
A na-eji CMC eme ihe na mmanụ ala, geological, kemịkalụ kwa ụbọchị, nri, ọgwụ na ụlọ ọrụ ndị ọzọ, nke a maara dị ka “monosodium glutamate industrial”.
※Njirimara nhazi nke CMC
CMC bụ ntụ ntụ na-acha ọcha ma ọ bụ dị ọkụ, granular ma ọ bụ fibrous siri ike.Ọ bụ kemịkalụ macromolecular nke nwere ike ịmịnye mmiri wee zaa.Mgbe ọ zara n'ime mmiri, ọ nwere ike ịmepụta gluu na-egbuke egbuke.pH nke nkwusioru aqueous bụ 6.5-8.5.Ihe na-adịghị ahụkebe na ihe mgbaze organic dị ka ethanol, ether, acetone na chloroform.
CMC siri ike dịtụ kwụsiri ike na ọkụ na ọnụ ụlọ, enwere ike ịchekwa ya ogologo oge na ebe kpọrọ nkụ.CMC bụ ụdị cellulose ether, nke a na-emekarị nke obere owu litter (ọdịnaya cellulose ruo 98%) ma ọ bụ osisi pulp, nke a na-emeso ya na sodium hydroxide wee meghachi omume na sodium monochloroacetate, ịdị arọ molecular nke ogige ahụ bụ 6400 (± 1000).A na-enwekarị ụzọ nkwadebe abụọ: usoro mmiri-coal na usoro mgbaze.Enwekwara eriri osisi ndị ọzọ eji edozi CMC.
※Atụmatụ na ngwa
CMC abụghị naanị ezigbo emulsification stabilizer na thickener na ngwa nri, kamakwa ọ nwere ezigbo oyi na nkwụsi ike na-agbaze, ma nwee ike melite ekpomeekpo nke ngwaahịa ahụ ma gbatịa oge nchekwa.
Na 1974, Food and Agriculture Organisation of the United Nations (FAO) na World Health Organisation (WHO) kwadoro iji CMC dị ọcha na nri mgbe nyocha na nyocha siri ike nke ndu na toxicological.Nri nchekwa (ADI) nke ọkọlọtọ mba ụwa bụ 25mg/kg arọ ahụ kwa ụbọchị.
※Thickening na emulsion kwụsie ike
Iri CMC nwere ike i emulsify na kwụsie ike ihe ọṅụṅụ nwere abụba na protein.Nke a bụ n'ihi na CMC na-aghọ colloid kwụsiri ike mgbe agbazere ya na mmiri, na protein ahụ na-aghọ akụkụ nke nwere otu ụgwọ ahụ n'okpuru nchebe nke akpụkpọ ahụ colloidal, nke nwere ike ime ka protein protein dị jụụ.Ọ nwere mmetụta emulsifying ụfọdụ, n'ihi ya, ọ nwere ike belata esemokwu dị n'etiti abụba na mmiri n'otu oge ahụ, nke mere na abụba nwere ike ịme emulsified kpamkpam.
CMC nwere ike imeziwanye nkwụsi ike nke ngwaahịa ahụ, n'ihi na mgbe uru pH nke ngwaahịa ahụ na-esi na isi nke isoelectric nke protein, sodium carboxymethyl cellulose nwere ike ịmepụta ihe mgbagwoju anya na protein, nke nwere ike imeziwanye nkwụsi ike nke ngwaahịa ahụ.
※Mụbaa nnukwu
Ojiji nke CMC na ice cream nwere ike ịbawanye ogo mgbasawanye nke ice cream, mee ka ọsọ ọsọ na-agbaze, nye ọdịdị dị mma na uto, ma na-achịkwa nha na uto nke kristal ice n'oge njem na nchekwa.Ọnụ ego ejiri mee ihe bụ 0.5% nke mkpokọta agbakwunyere agbakwunyere.
Nke a bụ n'ihi na CMC nwere ezigbo njide mmiri na dispersibility, na organically na-ejikọta protein ahụ, abụba globules, na mmiri ụmụ irighiri mmiri na colloid na-etolite a edo na kwụsiri ike usoro.
※Hydrophilicity na rehydration
A na-ejikarị ihe a na-arụ ọrụ nke CMC eme ihe na mmepụta achịcha, nke nwere ike ime ka mmanụ aṅụ na-eme ka ọ bụrụ otu, mee ka olu dịkwuo elu, belata dregs, ma nwee mmetụta nke nchekwa ọkụ na ịdị ọhụrụ;noodles agbakwunyere na CMC nwere ikike ijide mmiri dị mma, nguzogide isi nri, yana ụtọ dị mma.
A na-ekpebi nke a site na usoro ihe omimi nke CMC, nke bụ ihe na-emepụta cellulose ma nwee ọnụ ọgụgụ dị ukwuu nke hydrophilic dị na eriri molecular: -OH Group, -COONa Group, otú CMC nwere mma hydrophilicity karịa cellulose na mmiri na-ejide ikike.
※ Gelation
Thixotropic CMC pụtara na agbụ macromolecular nwere ụfọdụ ọnụọgụ mmekọrịta ma na-etolite nhazi akụkụ atọ.Mgbe emechara nhazi nke akụkụ atọ, viscosity nke ngwọta na-abawanye, ma mgbe agbajichara akụkụ atọ, viscosity na-ebelata.Ihe dị na thixotropy bụ na mgbanwe viscosity pụtara ìhè na-adabere na oge.
Thixotropic CMC na-arụ ọrụ dị mkpa na usoro gelling ma nwee ike iji mee jelii, jam na nri ndị ọzọ.
Enwere ike iji mee ihe dị ka nkọwa, ụfụfụ stabilizer, na-abawanye ọnụ
Enwere ike iji CMC mee ihe na mmepụta mmanya iji mee ka uto dịkwuo ụtọ ma baa ọgaranya na ogologo oge;enwere ike iji ya mee ihe dị ka ihe nkwụnye ụfụfụ na mmepụta biya iji mee ka ụfụfụ ahụ baa ọgaranya na ogologo oge ma melite uto.
CMC bụ ụdị polyelectrolyte, nke nwere ike itinye aka na mmeghachi omume dị iche iche na mmanya iji nọgide na-enwe nguzozi nke ahụ mmanya.N'otu oge ahụ, ọ na-ejikọta ya na kristal ndị mebere, na-agbanwe nhazi nke kristal, na-agbanwe ọnọdụ nke ịdị adị nke kristal na mmanya, na-eme ka mmiri ozuzo.Nchịkọta ihe.
Oge nzipu: Dec-03-2022