Sodium carboxymethylcellulose (NaCMC) thiab carboxymethylcellulose (CMC) yog ob qho tib si derivatives ntawm cellulose, ib tug natural polymer pom nyob rau hauv cov nroj tsuag cell phab ntsa. Cov tebchaw no muaj kev siv ntau yam kev lag luam, suav nrog zaub mov, tshuaj, textiles, thiab lwm yam.
Sodium Carboxymethylcellulose (NaCMC):
1.Chemical qauv:
NaCMC yog muab rho tawm los ntawm cellulose los ntawm kev hloov kho tshuaj. Carboxymethyl pawg (-CH2-COOH) tau nkag mus rau hauv cov qauv cellulose, thiab sodium ions yog txuam nrog cov pab pawg no.
Sodium ntsev ntawm CMC imparts dej solubility rau cov polymer.
2. Solubility:
NaCMC yog dej-soluble thiab tsim cov kua nplaum. Lub xub ntiag ntawm sodium ions txhim khu nws solubility hauv dej piv rau unmodified cellulose.
3. Nta thiab kev ua haujlwm:
Ua raws li cov thickener, stabilizer thiab dej tuav tus neeg sawv cev hauv ntau yam kev siv.
Pseudoplastic los yog shear-thinning tus cwj pwm, txhais tau hais tias nws viscosity txo nyob rau hauv shear stress.
4. Daim ntawv thov:
Kev lag luam khoom noj khoom haus: Siv los ua tus neeg sawv cev thickening hauv cov khoom noj xws li kua ntses, ice cream thiab ci khoom.
Pharmaceutical: Sivnyob rau hauv formulations rau nws binding thiab viscosity-txhim kho zog.
Roj drilling: siv los tswj viscosity thiab dej poob hauv cov kua dej drilling.
5. Ntau lawm:
Synthesized los ntawm cov tshuaj tiv thaiv ntawm cellulose nrog sodium hydroxide thiab monochloroacetic acid.
Carboxymethylcellulose (CMC):
1.Chemical qauv:
CMC hauv kev nkag siab dav hais txog carboxymethylated daim ntawv ntawm cellulose. Tej zaum nws yuav yog los tsis yogmuaj feem xyuam rau sodium ions.
Carboxymethyl pawg tau nkag mus rau hauv cov pob txha cellulose.
2. Solubility:
CMC tuaj yeem muaj nyob hauv ntau hom, suav nrog sodium ntsev (NaCMC) thiab lwm cov ntsev xws li calcium CMC (CAMC).
CMC sodium yog hom dej-soluble ntau tshaj plaws, tab sis nyob ntawm daim ntawv thov, CMC kuj tuaj yeem hloov kho kom tsis tshua muaj dej nyob hauv dej.
3. Nta thiab kev ua haujlwmnws:
Similar to NaCMC, CMC muaj nuj nqis rau nws cov thickening, stabilizing, thiab dej-retaining zog.
Kev xaiv ntawm CMC type (sodium, calcium, thiab lwm yam) nyob ntawm qhov xav tau ntawm cov khoom kawg.
4. Daim ntawv thov:
Siv dav hauv kev lag luam khoom noj, tshuaj, textile, ceramics thiab ntawv ntau lawm.
Daim ntawv sib txawvsntawm CMC tuaj yeem raug xaiv raws li cov cai tshwj xeeb ntawm daim ntawv thov.
5. Ntau lawm:
Carboxymethylation ntawm cellulose tuaj yeem koom nrog ntau hom tshuaj tiv thaiv thiab cov tshuaj reagents, ua rau muaj ntau hom CMC.
Qhov sib txawv tseem ceeb ntawm sodium CMC thiab CMC yog muaj cov sodium ions. Sodium CMC tshwj xeeb yog hais txog sodium ntsev ntawm carboxymethyl cellulose, uas yog dej-soluble heev. CMC, ntawm qhov tod tes, yog lub ntsiab lus dav dav uas suav nrog ntau hom carboxymethylated cellulose, suav nrog sodium thiab lwm cov ntsev, txhua tus muaj nws tus kheej cov khoom thiab kev siv. Kev xaiv ntawm sodium CMC thiab CMC nyob ntawm qhov kev npaj siv thiab cov khoom xav tau ntawm cov khoom kawg.
Post lub sij hawm: Jan-16-2024