I-sodium carboxymethyl cellulose (CMC), eyaziwa nangokuthi i-carboxymethyl cellulose. I-ether ye-cellulose ephezulu ye-polymer elungiselelwe i-cellulose yemvelo eshintsha amakhemikhali, futhi isakhiwo sayo sakhiwe ikakhulukazi amayunithi e-D-glucose axhunywe ngamabhondi e-β_(14) e-glycosidic.
I-CMC iyimpushana emhlophe noma emhlophe emhlophe noma ama-granules anobuningi obungu-0.5g/cm3, cishe ayinambitheki, ayinaphunga futhi i-hygroscopic.
I-Carboxymethyl cellulose kulula ukuyihlakaza, yenza isixazululo se-colloidal esisobala emanzini, futhi ayincibiliki ezincibilikisini eziphilayo njenge-ethanol.
Uma i-pH>10, inani le-pH lika-1% wesisombululo esinamanzi ngu-6.5≤8.5.
Ukusabela okuyinhloko kungokulandelayo: i-cellulose yemvelo iqala ukwenziwa i-alkali nge-NaOH, bese ingezwa i-chloroacetic acid, bese i-hydrogen eseqenjini le-hydroxyl kuyunithi ye-glucose isabela neqembu le-carboxymethyl ku-chloroacetic acid.
Kungabonakala esakhiweni ukuthi kunamaqembu amathathu e-hydroxyl kuyunithi ngayinye ye-glucose, okuyi-C2, i-C3 ne-C6 yamaqembu e-hydroxyl, kanye ne-degree yokufaka esikhundleni se-hydrogen eqenjini le-hydroxyl leyunithi ye-glucose imelwe izinkomba ezibonakalayo namakhemikhali.
Uma ama-hydrogen emaqenjini amathathu e-hydroxyl kuyunithi ngayinye ethathelwa indawo amaqembu e-carboxymethyl, khona-ke izinga lokushintsha lichazwa ngokuthi 7-8, ngezinga eliphezulu lokushintsha elingu-1.0 (ibanga lokudla lingafinyelela kuphela le degree). Izinga lokufaka esikhundleni se-CMC lithinta ngokuqondile ukuncibilika, ukufakwa kwe-emulsification, ukuqina, ukuzinza, ukumelana ne-asidi kanye nokumelana nosawoti we-CMC.
Uma sisebenzisa imikhiqizo ye-CMC, kufanele siqonde ngokugcwele imingcele yenkomba eyinhloko, njengokuzinza, i-viscosity, ukumelana ne-asidi, i-viscosity, njll.
Yiqiniso, izinhlelo zokusebenza ezahlukene zisebenzisa i-carboxymethyl cellulose ehlukene, ngoba kunezinhlobo eziningi ze-viscosity ezisebenza ku-carboxymethyl cellulose, futhi izinkomba zomzimba nezamakhemikhali nazo zihlukile. Ukwazi lokhu, ungakwazi ukwazi ukukhetha umkhiqizo ofanele.
Isikhathi sokuthumela: Nov-07-2022