Iipropati ze-Sodium Carboxymethyl Cellulose kunye nokuqaliswa kweMveliso

I-sodium carboxymethyl cellulose (CMC), eyaziwa ngokuba yi-carboxymethyl cellulose. I-ether ye-cellulose ephezulu ye-polymer elungiselelwe ngokuguqulwa kweekhemikhali ze-cellulose yendalo, kwaye isakhiwo sayo siqulunqwe ikakhulu ngeeyunithi ze-D-glucose ezidityaniswe yi-β_ (14) iibhondi ze-glycosidic.

I-CMC ngumgubo omhlophe okanye omhlophe omhlophe okanye i-granules enoxinano lwe-0.5g/cm3, phantse ayinancasa, ayinavumba kunye ne-hygroscopic.

I-Carboxymethyl cellulose kulula ukusasazeka, yenza isisombululo se-colloidal esicacileyo emanzini, kwaye ayinyibiliki kwizinyibilikisi ze-organic ezifana ne-ethanol.

Xa i-pH>10, ixabiso le-pH le-1% yesisombululo samanzi ngu-6.5≤8.5.

Ukusabela okuphambili ngolu hlobo lulandelayo: i-cellulose yendalo iqala i-alkali kunye ne-NaOH, ngoko i-chloroacetic acid yongezwa, kunye ne-hydrogen kwiqela le-hydroxyl kwiyunithi ye-glucose isabela kunye neqela le-carboxymethyl kwi-chloroacetic acid.

Inokubonwa kwisakhiwo ukuba kukho amaqela amathathu e-hydroxyl kwiyunithi nganye ye-glucose, oko kukuthi i-C2, i-C3 kunye ne-C6 yamaqela e-hydroxyl, kunye neqondo lokuthatha indawo ye-hydrogen kwiqela le-hydroxyl yeyunithi ye-glucose imelwe zizibonakaliso zomzimba kunye neekhemikhali.

Ukuba i-hydrogens kumaqela amathathu e-hydroxyl kwiyunithi nganye ithathelwe indawo ngamaqela e-carboxymethyl, ngoko i-degree of substitution ichazwa njenge-7-8, kunye neqondo eliphezulu lokutshintshwa kwe-1.0 (ibakala lokutya linokufikelela kuphela kule nqanaba). Izinga lokutshintshwa kwe-CMC lichaphazela ngokuthe ngqo ukunyibilika, i-emulsification, ukuqina, ukuzinza, ukumelana ne-asidi kunye nokuxhathisa ityuwa ye-CMC.

Xa sisebenzisa iimveliso ze-CMC, kufuneka siqonde ngokupheleleyo iiparitha eziphambili zesalathisi, ezifana nokuzinza, i-viscosity, ukumelana ne-asidi, i-viscosity, njl.

Ngokuqinisekileyo, izicelo ezahlukeneyo zisebenzisa i-carboxymethyl cellulose ezahlukeneyo, kuba zininzi iintlobo ze-viscosity ezisebenza kwi-carboxymethyl cellulose, kunye nezibonakaliso zomzimba kunye neekhemikhali nazo zahlukile. Ukwazi oku, unokwazi indlela yokukhetha imveliso efanelekileyo.