Carboxymethyl cellulose (Sodium Carboxymethyl Cellulose) hu ua CMC, yog ib tug nto active colloid polymer compound, yog ib yam ntawm odorless, tasteless, non-toxic water-soluble cellulose derivative, yog ua los ntawm absorbent paj rwb los ntawm lub cev-tshuaj kho mob. Cov tau txais 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 hu ua 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 refractory slurries 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, infiltrating thiab txuas cov khoom zoo, kom lub cev muaj zog ntau dua refractory tuaj yeem tau txais;
2. Txij li thaum carboxymethyl cellulose yog ib qho anionic polymer electrolyte, nws tuaj yeem txo qhov kev sib cuam tshuam ntawm cov khoom tom qab adsorbed rau saum npoo ntawm cov khoom, thiab ua si lub luag hauj lwm ntawm dispersant thiab tiv thaiv colloid, yog li txhim kho qhov ntom thiab lub zog ntawm cov khoom thiab txo. tom qab hlawv. Inhomogeneity ntawm lub koom haum qauv;
3. Siv carboxymethyl cellulose los ua ib qho kev sib khi, tsis muaj tshauv tom qab hlawv, thiab muaj ob peb yam khoom uas tsis tshua muaj melting, uas tsis cuam tshuam rau kev siv kub ntawm cov khoom.
Khoom nta
1. CMC yog cov hmoov dawb los yog daj me ntsis fiber ntau granular, saj tsis qab, tsis muaj ntxhiab, tsis muaj tshuaj lom, yooj yim soluble hauv dej, thiab tsim cov pob tshab viscous colloid, 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 kub hloov pauv sai, acidity thiab alkalinity ntawm cov tshuaj hloov pauv. Nyob rau hauv kev cuam tshuam ntawm ultraviolet hluav taws xob thiab cov kab mob, nws tseem yuav ua rau hydrolysis lossis oxidation, viscosity ntawm cov tshuaj yuav txo qis, thiab txawm tias cov tshuaj yuav puas. Yog tias cov tshuaj yuav tsum tau khaws cia ntev ntev, cov khoom tsim nyog xws li formaldehyde, phenol, benzoic acid, organic mercury compounds, thiab lwm yam tuaj yeem xaiv.
2. CMC yog tib yam li lwm cov polymer electrolytes. Thaum nws yaj, nws thawj zaug ua rau qhov tshwm sim o, thiab cov khoom sib txuas ua ke los ua ib zaj duab xis lossis viscose, uas ua rau nws tsis tuaj yeem tawg, tab sis dissolves maj mam. 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. Nyob rau hauv cov huab cua, cov ntsiab lus dej nruab nrab ntawm CMC 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%, cov ntsiab lus dej sib npaug yog siab dua 26%, thiab cov khoom siv dej cov ntsiab lus 10% lossis tsawg dua. Yog li ntawd, cov khoom ntim thiab khaws cia yuav tsum tau them sai sai rau cov dej-pov thawj.
4. Zinc, tooj liab, txhuas, txhuas, nyiaj, hlau, tin, chromium thiab lwm yam hnyav hlau ntsev tuaj yeem ua rau CMC aqueous tov. Tsuas yog cov ntsev-raws li cov hmoov lead acetate, cov precipitate tseem tuaj yeem rov ua dua hauv sodium hydroxide lossis ammonium hydroxide tov. .
5. Organic lossis inorganic acids kuj yuav ua rau nag lossis daus rau cov tshuaj ntawm cov khoom no. Cov nag lossis daus tshwm sim txawv nrog rau hom thiab concentration ntawm cov kua qaub. Feem ntau, nag lossis daus tshwm sim thaum pH qis dua 2.5, thiab nws tuaj yeem rov qab tau tom qab nruab nrab nrog alkali.
6. Hauv cov ntsev xws li calcium, magnesium thiab lub rooj ntsev, nws tsis muaj nag lossis daus ntawm cov tshuaj CMC, tab sis nws cuam tshuam rau viscosity txo.
7. CMC yog sib xws nrog lwm cov dej-soluble glues, softeners thiab resins.
8. Cov yeeb yaj kiab tau kos los ntawm CMC, raus hauv acetone, benzene, butyl acetate, carbon tetrachloride, castor roj, pob kws roj, ethanol, ether, dichloroethane, roj av, methanol, methyl acetate, methyl ethyl acetate ntawm chav tsev kub Ketone, toluentine xylene, txiv laum huab xeeb, thiab lwm yam tuaj yeem hloov pauv tsis pub dhau 24 teev
Post lub sij hawm: Nov-07-2022