01. Cov khoom ntawm cov sodium carboxymethylcelleculose
Sodium Carboxymethyl cellulose yog anionic polymer electrolyte. Cov degree ntawm kev hloov pauv CMC li ntawm 0.4 txog 1.2. Nyob ntawm qhov kev coj dawb huv, cov tsos yog dawb lossis tawv nqaij dawb.
1. Lub viscosity ntawm kev daws teeb meem
Lub viscosity ntawm cmc aqueous nce nrawm nrog nce kev nce siab, thiab kev daws tau muaj pseudopastic khiav cov yam ntxwv. Cov kev daws teeb meem nrog qis dua qib (DS = 0.4-0.7) feem ntau muaj thixotropy yuav hloov thaum shear tau thov lossis tshem tawm rau kev daws teeb meem. Lub viscosity ntawm CMC aqueous kev daws teeb meem tsawg dua nrog kev nce kub, thiab cov txiaj ntsig no tau thim rov qab thaum qhov kub tsis tshaj 50 ° C. Thaum kub siab dua rau lub sijhawm ntev, CMC yuav txwv. Qhov no yog vim li cas vim li cas glaze ci yog ib qho yooj yim tig dawb thiab tsis zoo thaum luam ntawv nyias kab txawv txawv.
CMC siv rau ci yuav tsum xaiv cov khoom lag luam nrog qib siab hloov chaw, tshwj xeeb tshaj yog cov ntshav los ntshav.
2. Cov nyhuv ntawm PHU RAU CMC
Lub viscosity ntawm CMC aqueous kua tseem nyob rau hauv ib feem ntau, thiab yog qhov tseem ceeb ntawm pH 7 thiab 9. Nrog PH
Tus nqi txo qis, thiab cmc puv los ntawm cov ntsev daim ntawv mus rau acid daim ntawv, uas yog insoluble hauv dej thiab precipitates. Thaum tus nqi pH muaj tsawg dua 4, feem ntau ntawm cov ntsev ua kom puv rau hauv cov acid ua thiab precipitates. Thaum lub pH yog qis dua 3, qib degree hloov chaw yog tsawg dua 0.5, thiab nws tuaj yeem hloov kho los ntawm cov ntsev ua tiav. Tus lej pH ntawm kev hloov pauv ntawm CMC nrog qib siab ntawm kev hloov pauv (saum toj 0.9) yog qis dua 1.
3. Kev sib raug zoo ntawm CMC thiab Hlau ions
Monovalent hlau ions tuaj yeem tsim cov dej-soluble ntsev nrog CMC, uas yuav tsis cuam tshuam rau cov kua aqueous, tab sis AG + yog qhov kev zam, uas yuav ua rau kev daws teeb meem rau precipitate. Cov hlau sib ntaus ions, xws li BA2 +, FE2 +, PB2 +, SN2 +, thiab lwm yam ua rau precipate; CA2 +, MG2 +, MN2 +, thiab lwm yam tsis muaj kev cuam tshuam rau kev daws teeb meem. Trunention Hlau ions ua insoluble ntsev nrog CMC, lossis nag lossis nag lossis kua muag tsis tuaj yeem ua tuab nrog cmc.
Muaj tsis paub meej nyob rau hauv ntsev kev ua haujlwm ntawm CMC:
(1) Nws muaj feem xyuam rau hom ntawm cov hlau ntsev, tus nqi ntawm PHEM, tus nqi ntawm kev daws teeb meem thiab qib kev hloov chaw ntawm CMC;
(2) Nws muaj feem xyuam rau cov kev sib xyaw ua ke thiab txoj kev ntawm cmc thiab ntsev.
CMC nrog qib siab ntawm kev hloov pauv tau zoo dua nrog cov ntsev zoo dua, thiab cov txiaj ntsig ntawm cov ntsev kom zoo dua rau cov dej ntsev zoo dua.
CMC yog qhov zoo. Yog li ntawd, thaum npaj Oscotic Glaze, feem ntau yaj cmc hauv dej ua ntej, thiab tom qab ntawd ntxiv osmotic ntsev tov.
02. Yuav ua li cas paub txog Collc hauv kev ua lag luam
Tso cai los ntawm Purity
Cov qib siab huv - cov ntsiab lus yog siab dua 99.5%;
Muaj cov huab cua ntshiab - cov ntsiab lus yog siab dua 96%;
Cov khoom uas nyoos - Cov ntsiab lus yog siab dua 65%.
CLASIFIFIFIFIFIFIFIFIED
Siab viscosity hom - 1% tshuaj viscosity yog saum 5 pa s;
Nruab nrab viscosity hom - viscosity ntawm 2% tov yog qhov tseem ceeb 5 pa s;
Hom tsis muaj viscosity - 2% daws viscosity dua 0.05 PAHNA.
03. Piav qhia txog cov qauv sib txawv
Txhua tus neeg tsim khoom muaj nws tus qauv, nws tau hais tias muaj ntau tshaj 500 yam. Feem ntau cov qauv muaj peb ntu: x-y-z.
Thawj tsab ntawv sawv cev rau kev lag luam siv:
F - Cov zaub mov qib;
Kuv - qib kev lag luam;
C - Khab Mev;
O - qib roj av.
Tsab ntawv thib ob sawv cev rau theem viscosity:
H - High viscosity
M - Nruab nrab viscosity
L - qis viscosity.
Daim ntawv thib peb sawv cev rau cov qib siab ntawm qhov hloov chaw, thiab nws cov lej muab faib los ntawm 10 yog qhov tseeb degree ntawm kev hloov pauv ntawm CMC.
Piv txwv li:
Tus qauv ntawm CMC yog FH9, uas txhais tau tias CMC nrog rau qib zaub mov, siab viscosity thiab hloov degree ntawm 0.9.
Tus qauv ntawm CMC yog CM6, uas txhais tau CMC ntawm cov kab ke sib txawv, nruab nrab viscosity thiab hloov chaw qib ntawm 0.6.
Sib xyaws, tseem muaj qib siv hauv tshuaj, textile thiab lwm yam kev lag luam, uas tsis tshua pom muaj nyob hauv kev siv ceramic kev lag luam.
04. Ceramic Kev Xaiv Kev Lag Luam
1. Viscosity Stabilabab
Nov yog thawj kis mob los xaiv CMC rau ci
(1) Viscosity tsis hloov pauv qhov tseem ceeb ntawm txhua lub sijhawm
(2) Viscosity tsis tau hloov pauv nrog kub.
2. Me thixotropy
Nyob rau hauv kev tsim cov vuas luaj, lub ntsej muag ci slurry tsis tuaj yeem yog qhov zoo ntawm cov ntsej muag zoo nkauj, yog li nws yog qhov zoo tshaj los xaiv cov zaub mov-qib CMC. Txhawm rau txo tus nqi, qee cov chaw tsim khoom siv Industrial-qib CMC, thiab lub ntsej muag zoo tau yooj yim cuam tshuam.
3. Ua tib zoo saib rau hom phiaj viscosity
(1) CMC lub siab muaj kev sib raug zoo nrog lub viscosity, yog li kev saib xyuas yuav tsum tau them rau qhov raug ntawm qhov hnyav;
(2) Ua tib zoo saib rau kev sib txawv ntawm CMC daws. Txoj kev ntsuas nruj yog kom do txoj kev daws rau 2 teev ua ntej ntsuas nws viscosity;
(3) Qhov kub muaj txiaj ntsig zoo rau cov viscosity, yog li saib xyuas yuav tsum tau them rau qhov chaw kub ambient thaum lub sijhawm ntsuas;
(4) Ua tib zoo mloog rau kev khaws cia ntawm CMC daws los tiv thaiv nws cov tsis zoo.
(5) Ua tib zoo saib rau qhov sib txawv ntawm viscosity thiab sib xws.
Lub Sijhawm Post: Jan-05-2023