CMC na-eji na ụlọ ọrụ nchacha

Carboxymethyl cellulose (nke a makwaara dị ka CMC na sodium carboxymethyl cellulose) nwere ike kọwara dị ka ihe anionic mmiri-soluble polima, emepụta si eke cellulose site etherification, dochie hydroxyl otu na carboxymethyl otu na cellulose Chain carboxymethyl cellulose na-eji dị ka ihe nkedo, thickener, onye nkwusioru na ihe nkpuchi na ngwa dị iche iche.

Ụkpụrụ mmeghachi omume

Mmeghachi omume kemịkalụ bụ isi nke CMC bụ mmeghachi omume alkalization nke cellulose na alkali iji mepụta cellulose alkali na mmeghachi omume etherification nke alkali cellulose na monochloroacetic acid.

Kwụpụ 1: Alkalization: [C6H7O2(OH) 3]n + nNaOH→[C6H7O2(OH) 2ONa ] n + nH2O

Kwụpụ 2: Etherification: [C6H7O2(OH) 2ONa] n + nClCH2COONa→[C6H7O2(OH) 2OCH2COONa ]n + nNaCl

Ọdịdị kemịkalụ

A na-akwado ihe nrụpụta cellulose nke nwere ihe mgbakwunye carboxymethyl site n'ịgwọ cellulose na sodium hydroxide iji mepụta cellulose alkali, wee meghachi omume na monochloroacetic acid. Ngalaba glucose mejupụtara cellulose nwere otu hydroxyl 3 nke enwere ike dochie ya, yabụ enwere ike nweta ngwaahịa nwere ogo dị iche iche. Na nkezi, a na-ewebata 1 mmol nke carboxymethyl kwa 1g nke arọ akọrọ. Ọ na-esighi ike na mmiri na itughari acid, ma enwere ike zaa ma jiri ya mee ihe maka chromatography mgbanwe ion. pKa nke carboxymethyl dị ihe dịka 4 na mmiri dị ọcha yana ihe dịka 3.5 na 0.5mol/L NaCl. Ọ bụ onye na-agbanwe cation acid na-esighị ike, a na-ejikwa ya maka ikewapụ ndị na-anọpụ iche na protein ndị bụ isi na pH 4 ma ọ bụ karịa. Ndị nwere ihe karịrị 40% nke hydroxyl dị iche iche nke carboxymethyl dochie anya nwere ike igbari na mmiri iji mepụta ngwọta colloidal siri ike dị elu.

Njirimara ngwaahịa nkencha ọkwa CMC

Mgbe etinyechara ya na nchacha, nkwekọ ahụ dị elu, nke na-apụta ìhè, ọ naghị alaghachikwa n'ụdị;

Ọ nwere ike ịgbatị ma mee ka ihe mejupụtara nke mmiri mmiri sie ike;

Ịgbakwunye ntụ ntụ na ihe ncha mmiri mmiri nwere ike igbochi unyi a na-asacha ka ọ ghara ịdakwasị akwa ahụ ọzọ. Ịtinye 0.5-2% na ihe nchacha sịntetik nwere ike nweta nsonaazụ na-eju afọ;

CMC na-eji na ụlọ ọrụ nchacha, ọkachasịgbado anya na na emulsification na nchebe colloid Njirimara nke CMC. Anion nke a na-emepụta n'oge usoro ịsa ahụ nwere ike n'otu oge na-eme ka elu nke ịsacha ahụ na ihe ndị na-adịghị na ya na-eme ka ọ bụrụ ihe na-adịghị mma, nke mere na ihe ndị na-adịghị ahụkebe nwere nkewa nkewa na oge mmiri ma nwee mmetụta dị otú ahụ n'elu mmiri nke siri ike. Mwepu, na-egbochi unyi ka ọ ghara itinyeghachi ya n'ebe a na-asa ákwà, nwere ike ịnọgide na-adị ọcha nke ákwà ọcha, na agba na-egbuke egbuke nke akwa akwa.

Ọrụ nke CMC nancha

1. Ịgbara, na-agbasa na emulsifying, ọ nwere ike ịmịkọrọ mmanụ na-egbuke egbuke gburugburu ebe ahụ iji kechie ntụpọ mmanu mmanu, nke mere na a na-akwụsịtụ mmanu mmanu ma gbasaa n'ime mmiri, na-etolite ihe nkiri hydrophilic n'elu ihe ndị a na-asacha, si otú ahụ na-egbochi. ntụpọ mmanu mmanu site na ịkpọtụrụ ihe ndị a na-asacha ozugbo.
2. Ogo dị elu nke nnọchi na ịdị n'otu, nghọta dị mma;
3. Ezi dispersibility na mmiri na ezigbo resorption nguzogide;
4. Super elu viscosity na ezigbo nkwụsi ike.