Carboxymethyl Cellulose (Sodium Carboxymethyl Cellulose), hu ua CMC, yog ib tug polymer compound ntawm nto active colloid. Nws yog ib qho tsis muaj ntxhiab, tsis qab, tsis muaj tshuaj lom dej-soluble cellulose derivative. Cov organic cellulose binder yog ib hom cellulose ether, thiab nws cov ntsev ntsev feem ntau yog siv, yog li nws lub npe tag nrho yuav tsum yog sodium carboxymethyl cellulose, uas yog, CMC-Na.
Zoo li methyl cellulose, carboxymethyl cellulose tuaj yeem siv los ua ib qho surfactant rau cov ntaub ntawv refractory thiab ua ib ntus rau cov ntaub ntawv refractory.
Sodium carboxymethyl cellulose yog ib qho hluavtaws polyelectrolyte, yog li nws tuaj yeem siv los ua cov khoom tawg thiab stabilizer rau cov av nkos refractory thiab castables, thiab nws kuj yog ib qho kev ua haujlwm zoo ib ntus organic binder. Nws muaj qhov zoo hauv qab no:
1. Carboxymethyl cellulose tuaj yeem ua tau zoo adsorbed rau ntawm qhov chaw ntawm cov khoom, zoo infiltrated thiab txuas nrog cov khoom, kom muaj zog refractory blanks tuaj yeem tsim tau;
2. Txij li thaum carboxymethyl cellulose yog anionic polymer electrolyte, nws tuaj yeem txo qhov kev sib cuam tshuam ntawm cov khoom tom qab tau adsorbed rau ntawm qhov chaw particle, thiab ua raws li cov dispersant thiab tiv thaiv colloid, yog li txhim kho qhov ntom thiab lub zog ntawm cov khoom thiab txo cov tom qab inhomogeneity ntawm lub koom haum qauv;
3. Siv carboxymethyl cellulose ua binder, tsis muaj cov hmoov tshauv tom qab hlawv, thiab muaj cov ntaub ntawv melting tsawg heev, uas yuav tsis cuam tshuam qhov kev pabcuam kub ntawm cov khoom.
Khoom nta:
1. CMC yog cov hmoov dawb los yog daj daj fiber ntau granular hmoov, tsis qab, tsis muaj ntxhiab, tsis muaj tshuaj lom, yooj yim soluble hauv dej, thiab tsim cov pob tshab viscous colloid, thiab cov tshuaj yog nruab nrab lossis me ntsis alkaline. Nws tuaj yeem khaws cia rau lub sijhawm ntev yam tsis muaj kev puas tsuaj, thiab nws kuj tseem ruaj khov nyob rau hauv qis kub thiab tshav ntuj. Txawm li cas los xij, vim qhov hloov pauv sai ntawm qhov kub thiab txias, acidity thiab alkalinity ntawm cov tshuaj yuav hloov. Nyob rau hauv kev cuam tshuam ntawm ultraviolet rays thiab kab mob, nws tseem yuav ua rau hydrolysis los yog oxidation, lub viscosity ntawm cov tshuaj yuav txo, thiab txawm cov tshuaj yuav corrupted. Yog tias cov tshuaj yuav tsum tau muab khaws cia rau lub sijhawm ntev, cov khoom tsim nyog tuaj yeem xaiv tau, xws li formaldehyde, phenol, benzoic acid, thiab organic mercury compounds.
2. CMC yog tib yam li lwm cov polymer electrolytes. Thaum nws dissolves, nws yuav ua ntej swell, thiab cov hais yuav adhering rau ib leeg los tsim ib tug zaj duab xis los yog viscose pawg, thiaj li hais tias lawv yuav tsis tau dispersed, tab sis lub dissolution yog qeeb. Yog li ntawd, thaum npaj nws cov tshuaj aqueous, yog tias cov khoom tuaj yeem ua tau zoo sib xws ua ntej, qhov kev sib cais tuaj yeem nce ntxiv.
3. CMC yog hygroscopic. Qhov nruab nrab noo noo ntawm CMC nyob rau hauv cov huab cua nce nrog qhov nce ntawm huab cua kub thiab txo nrog qhov nce ntawm huab cua kub. Thaum qhov nruab nrab kub ntawm chav tsev kub yog 80% -50%, qhov sib npaug ntawm cov dej noo siab tshaj 26%, thiab cov khoom noo noo tsawg dua 10%. Yog li ntawd, cov khoom ntim thiab khaws cia yuav tsum tau them sai sai rau cov dej-pov thawj.
4. Heavy hlau ntsev xws li zinc, tooj liab, txhuas, txhuas, nyiaj, hlau, tin, chromium, thiab lwm yam, tuaj yeem ua rau nag lossis daus hauv CMC aqueous tov, thiab nag lossis daus tseem tuaj yeem rov ua dua hauv sodium hydroxide lossis ammonium hydroxide tov. tshwj tsis yog rau cov hlau lead acetate.
5. Organic lossis inorganic acids kuj yuav ua rau nag lossis daus hauv cov tshuaj ntawm cov khoom no. Cov nag lossis daus tshwm sim txawv vim yog hom thiab concentration ntawm cov kua qaub. Feem ntau, nag lossis daus tshwm sim hauv qab pH 2.5, thiab nws tuaj yeem rov qab tau tom qab nruab nrab los ntawm kev ntxiv alkali.
6. Cov ntsev xws li calcium, magnesium thiab cov ntsev ntsev tsis muaj nag lossis daus ntawm cov tshuaj CMC, tab sis cuam tshuam rau kev txo cov viscosity.
7. CMC yog sib xws nrog lwm cov dej-soluble glues, softeners thiab resins.
8. Cov zaj duab xis kos los ntawm CMC yog raus rau hauv acetone, benzene, butyl acetate, carbon tetrachloride, castor roj, pob kws roj, ethanol, ether, dichloroethane, roj av, methanol, methyl acetate, methyl ethyl ether ntawm chav tsev kub Ketone, toluentine, , xylene, txiv laum huab xeeb, thiab lwm yam yuav tsis hloov hauv 24 teev.
Post lub sij hawm: Jan-05-2023