CMC siv hauv kev lag luam detergent

Carboxymethyl cellulose (tseem hu ua CMC thiab sodium carboxymethyl cellulose) tuaj yeem piav qhia raws li anionic dej-soluble polymer, tsim los ntawm ntuj cellulose los ntawm etherification, hloov cov hydroxyl pawg nrog cov carboxymethyl pawg ntawm cellulose chain carboxymethyl cellulose yog siv los ua ib phau ntawv, thickener, suspending agent thiab muab tub lim hauv ntau daim ntawv thov.

Reaction txoj cai

Cov tshuaj tiv thaiv tseem ceeb ntawm CMC yog cov tshuaj tiv thaiv alkalization ntawm cellulose thiab alkali los tsim alkali cellulose thiab etherification cov tshuaj tiv thaiv ntawm alkali cellulose thiab monochloroacetic acid.

Kauj Ruam 1: Alkalization: [C6H7O2(OH) 3]n + nNaOH→[C6H7O2(OH) 2ONa]n + nH2O

Kauj Ruam 2: Etherification: [C6H7O2(OH) 2ONa]n + nClCH2COONa→[C6H7O2(OH) 2OCH2COONa]n + nNaCl

Tshuaj lom neeg

Cov cellulose derivative nrog carboxymethyl substituent yog npaj los ntawm kev kho cellulose nrog sodium hydroxide los tsim alkali cellulose, thiab ces reacting nrog monochloroacetic acid. Cov piam thaj hauv cov cellulose muaj 3 pawg hydroxyl tuaj yeem hloov tau, yog li cov khoom uas muaj ntau qib hloov pauv tau. Qhov nruab nrab, 1 mmol ntawm carboxymethyl yog qhia rau 1 g ntawm qhov hnyav qhuav. Nws yog insoluble hauv dej thiab dilute acid, tab sis tuaj yeem o thiab siv rau ion pauv chromatography. Cov pKa ntawm carboxymethyl yog hais txog 4 hauv dej ntshiab thiab txog 3.5 hauv 0.5mol / L NaCl. Nws yog ib qho tsis muaj zog acidic cation exchanger thiab feem ntau yog siv rau kev sib cais ntawm nruab nrab thiab theem pib proteins ntawm pH 4 los yog siab dua. Cov neeg uas muaj ntau dua 40% ntawm cov pab pawg hydroxyl hloov los ntawm carboxymethyl tuaj yeem yaj hauv dej los tsim cov kua dej khov kho siab-viscosity colloidal.

Khoom yam ntxwv ntawmtshuaj ntxuav tes qib CMC

Tom qab ntxiv rau cov tshuaj ntxuav tes, qhov sib xws yog siab, pob tshab, thiab tsis rov qab los nyias;

Nws tuaj yeem ua kom tuab thiab ruaj khov ntawm cov kua xab npum;

Ntxiv cov hmoov ntxhua thiab kua xab npum tuaj yeem tiv thaiv cov av uas tau ntxuav los ntawm cov ntaub dua. Ntxiv 0.5-2% rau cov khoom siv hluavtaws tuaj yeem ua tiav cov txiaj ntsig zoo;

CMC siv hauv kev lag luam tshuaj ntxuav tes, Feem ntautsom rau emulsification thiab tiv thaiv colloid zog ntawm CMC. Cov anion uas tsim thaum lub sij hawm ntxuav yuav ua tau ib txhij ua rau saum npoo ntawm lub ntxhua thiab cov av hais tsis zoo, yog li ntawd cov av hais muaj theem sib cais nyob rau hauv cov dej theem thiab muaj ib tug zoo tib yam nyhuv ntawm cov khoom ntxuav. Repellency, tiv thaiv cov av los ntawm kev rov qab tso rau ntawm cov khaub ncaws, tuaj yeem khaws cov ntaub dawb ntawm cov ntaub dawb, thiab cov xim ci ntawm cov ntaub xim.

Muaj nuj nqi ntawm CMC hauvtshuaj ntxuav tes

1. Thickening, dispersing thiab emulsifying, nws muaj peev xwm nqus cov oily stains nyob ib ncig ntawm qhov chaw los qhwv cov oily stains, thiaj li hais tias cov oily stains raug tshem tawm thiab dispersed nyob rau hauv dej, thiab tsim ib tug hydrophilic zaj duab xis nyob rau saum npoo ntawm cov khoom ntxuav, yog li tiv thaiv cov oily stains los ntawm ncaj qha mus cuag cov khoom ntxuav.
2. High degree ntawm kev hloov thiab uniformity, zoo transparency;
3. Zoo dispersibility hauv dej thiab zoo resorption kuj;
4. Super siab viscosity thiab zoo stability.