Sodium carboxymethyl cellulose (CMC), inozivikanwawo secarboxymethyl cellulose. I-high-polymer cellulose ether yakagadzirirwa nemakemikari ekugadzirisa cellulose yechisikigo, uye chimiro chayo chinonyanya kuumbwa neD-glucose units yakabatanidzwa ne β_ (14) glycosidic bonds.
CMC ichena kana mukaka chena fibrous poda kana granules ine density ye 0.5g/cm3, inenge isinganakidze, isinganhuhwi uye hygroscopic.
Carboxymethyl cellulose iri nyore kuparadzira, inoumba yakajeka colloidal mhinduro mumvura, uye isinganyungudika muorganic solvents senge ethanol.
Kana pH>10, iyo pH kukosha kwe1% aqueous solution ndeye 6.5≤8.5.
Mhedzisiro huru ndeyekutevera: iyo yakasikwa cellulose inotanga alkali neNaOH, ipapo chloroacetic acid inowedzerwa, uye iyo hydrogen paboka rehydroxyl paglucose unit inopindirana neboka recarboxymethyl mu chloroacetic acid.
Zvinogona kuonekwa kubva pakugadzirisa kuti kune mapoka matatu e-hydroxyl pane imwe neimwe yeglucose unit, iyo C2, C3 uye C6 hydroxyl mapoka, uye dhigirii yekutsiva yehydrogen paboka re hydroxyl yeglucose unit inomiririrwa nezviratidzo zvemuviri nemakemikari.
Kana ma hydrogens pamapoka matatu ehydroxyl pachikamu chega chega akatsiviwa nemapoka ecarboxymethyl, ipapo dhigirii rekutsiva rinotsanangurwa se7-8, nehupamhi hwekutsiva 1.0 (giredhi rekudya rinogona kungowana dhigirii iri). Iyo dhigirii yekutsiviwa kweCMC inokanganisa zvakananga kunyungudika, emulsification, kukora, kugadzikana, kuramba kweasidhi uye kuramba kwemunyu kweCMC.
Paunenge uchishandisa CMC zvigadzirwa, isu tinofanirwa kunyatsonzwisisa main index paramita, sekugadzikana, viscosity, acid kuramba, viscosity, nezvimwe.
Ehe, akasiyana maapplication anoshandisa akasiyana carboxymethyl cellulose, nekuti kune akawanda marudzi eviscosity anoshanda pacarboxymethyl cellulose, uye zviratidzo zvemuviri nemakemikari zvakare zvakasiyana. Kuziva izvi, unogona kuziva nzira yekusarudza chigadzirwa chakakodzera.
Nguva yekutumira: Nov-07-2022