Cov tub ntxhais ntawm cov vuas luaj yog ci, uas yog txheej ntawm cov vuas luaj ntawm cov vuas, Hauv cov vuas luaj muag, ruaj khov ci ci slurry txheej txheem kev ua tau zoo yuav tsum tau ua, yog li kom ua tiav cov txiaj ntsig zoo thiab ua tau zoo. Cov ntsuas ntsuas tseem ceeb ntawm nws cov txheej txheem kev ua tau zoo suav nrog Viscosity, fellosity, dispersion, ncua kev sib raug zoo thiab smoothness. Hauv kev tsim khoom tiag tiag, peb tau raws li peb cov khoom tsim kev tsim khoom los ntawm kev ua kom muaj tshuaj lom neeg cov khoom siv hluav taws xob thiab cov tshuaj pleev kom huv si los kho viscosity, cov tshuaj pleev kom huv, ntawm cov neeg CMC kuj muaj cov nyhuv tshwj xeeb. Sodium tripolyphosphate thiab ua kua degumming agoncing pc67 muaj kev txuag yog tua cov kab mob thiab cov kab mob sib luag los tiv thaiv methyl cellulose. Thaum lub sij hawm ntev cia ntawm lub ci slurry, lub ions hauv lub ci ntsa iab thiab thixotrotropy cov tshuaj thiab thixotrotropy, thiab lub methyl pawg hauv cov slurry swb thiab cov kev txo qis txo qis. Cov ntawv no feem ntau yog tham txog lub methyl ntawm methyl lub sijhawm zoo los tswj cov txheej txheem ntawm methyl collrry hauv cov qauv, tus nqi ua haujlwm, thiab staleness.
1. Cov nyhuv ntawm cov pab pawg methyl (CMC) ntawm cov khoom ntawm ci slurry
Carboxymethyl cellulose cmc yog polyanionic sib xyaw nrog cov dej ua kom zoo (Alkali cellulose thiab etherifation tus neeg sawv cev tshuaj), thiab nws tseem yog organic polymer. Mas siv cov khoom ntiag tug ntawm kev ua tsev, kom tshem tawm, tshem tawm dispersion, thiab decondensation kom ua rau lub ci nto du thiab ntom. Muaj cov sib txawv uas yuav tsum muaj rau cov viscos, thiab nws tau muab faib ua lub siab, nruab nrab, qis, thiab ultra-tsis viscosities. High thiab low-viscosity methyl pawg yog ua tiav los ntawm kev tswj hwm qhov kev cuam tshuam ntawm cellulose-uas yog, kev tawg ntawm cellulose molecular chains. Cov nyhuv tseem ceeb tshaj plaws yog tshwm sim los ntawm cov pa oxygen hauv huab cua. Cov tshuaj tiv thaiv tseem ceeb rau kev npaj siab-viscosity CMC yog oxygen barushing, txias thiab khov thiab khov, ntxiv cov neeg sawv cev sib txuas thiab tsis sib xws. Raws li kev soj ntsuam ntawm cov phiaj xwm 1, cov phiaj xwm 2, thiab cov phiaj xwm 3, nws tuaj yeem pom tau tias muaj cov pab pawg neeg tsis muaj peev xwm ntawm cov pab pawg neeg siab zoo dua li ntawm cov pab pawg neeg siab. Hais txog lub xeev, cov pab pawg methyl tsawg yog ntau dua li cov pab pawg methyl ntau me me thiab muaj cov saw luv. Raws li lub tswv yim ntawm kev nkag tau nce, nws yog lub xeev ruaj khov dua li cov pab pawg viscosity High-viscosity. Yog li ntawd, thiaj li yuav ua kom muaj kev ruaj ntseg ntawm cov qauv, koj tuaj yeem sim ua kom cov pawg tsawg-viscosity, zam kev sib zog kom ruaj khov, tsis txhob muaj ob pab neeg txaus hauv kev tsim khoom vim qhov tsis muaj peev xwm ntawm ib qho CMC.
2. Cov nyhuv ntawm cov dej uas yuav nkag rau hauv lub pob ntawm kev ua yeeb yam ntawm lub ci slurry
Dej nyob rau hauv lub glazen mis txawv txawv vim muaj cov txheej txheem sib txawv. Raws li cov ntau ntawm 38-45 grams dej ntxiv rau 100 grams qhuav, cov dej tuaj yeem ntub cov slurry hais thiab tuaj yeem txo cov thixotropy ntawm lub ci slurry. Tom qab soj ntsuam cov phiaj xwm 3 thiab cov phiaj xwm 9, peb tuaj yeem nrhiav tau tias qhov nrawm ntawm cov pab pawg methyl tsis yooj yim los khaws cia los nag thaum siv thiab cia. Yog li ntawd, nyob rau hauv peb cov kev tsim tiag tiag, tus nqi ntws tuaj yeem tswj tau los ntawm kev txo cov dej ntawm cov dej. Rau cov txheej txheem txau txau, muaj kev sib tsoo siab thiab cov khoom siv kub kub tuaj yeem tuaj yeem saws, koj yuav tsum tau ua kom pom lub ntsej muag thiab dej kom zoo. Lub viscosity ntawm glaze yog siv los xyuas kom meej tias lub ci ci saum npoo yog du tsis muaj hmoov uas tau txau lub ntsej muag.
3. Cov nyhuv ntawm kaolin cov ntsiab lus ntawm ci slurry cov khoom
Kaolin yog ib qho ntxhia. Nws lub ntsiab lus tseem ceeb yog Kaolinite cov zaub mov thiab ib qho me me ntawm Montmorillonite, Mictmorite, Feldspar, Feldspar, Felpspar, Feldspar tsis txaus ntseeg thiab cov lus qhia ntawm Alumina hauv Glazes. Ua raws li cov txheej txheem glazing, nws hloov ntawm 7-15%. Los ntawm kev sib piv cov txheej txheem 3 nrog cov txheej txheem 4, peb tuaj yeem nrhiav tau tias nrog qhov nce ntawm Kaolin cov ntsiab lus, tus khiav txaus ntawm cov slurry nce thiab nws tsis yooj yim los khom. Qhov no yog vim tias lub viscosity muaj feem cuam tshuam rau cov ntxhia muaj pes tsawg, particle loj thiab cation yam hauv cov av nkos. Feem ntau hais lus, qhov ntau cov ntsiab lus Montmorillonite, cov ntsiab lus zoo tshaj plaws, qhov ntau dua vim yog cov kab mob uas tsis txaus ntseeg, yog li nws tsis yooj yim pauv tau lub sijhawm. Yog li ntawd, rau glazes uas yuav tsum tau khaws cia rau lub sijhawm ntev, peb yuav tsum nce cov ntsiab lus ntawm kaolin.
4. Cov nyhuv ntawm milling sijhawm
Cov txheej txheem crushing ntawm pob zeb ua kom puas, cua sov, hydrolysis thiab lwm yam kev puas tsuaj rau CMC. Los ntawm kev sib piv ntawm cov txheej txheem 3, cov phiaj xwm 5 thiab cov phiaj xwm 7, peb tuaj yeem tau txais kev puas tsuaj ntev rau lub sijhawm, tus muaj zog ntawm lub sijhawm, cov viscicity loj heev rau lub sijhawm ntev thiab tsis yooj yim rau nag lossis daus. Txawm hais tias cov kev ntxiv ntxiv rau ntawm lub sijhawm kawg hauv phiaj xwm 7, txawm hais tias lub viscosity ci ntsa iab loj dua, qhov tsis ua tiav yog sai dua. Qhov no yog vim hais tias ntev cov saw hlau, qhov yooj yim nws yog kom tau txais cov methyl pab pawg oxygen yuav poob nws cov kev ua tau zoo. Tsis tas li ntawd, vim tias cov pob milling efficiency yog tsawg vim tias nws tsis ntxiv ua ntej cov suberization yog qhov siab thiab lub zog ntawm cov kaolin cov lus tsis muaj zog, yog li cov slurry slurry tuaj sai dua.
5. Cov txiaj ntsig ntawm cov tshuaj txuag
Los ntawm kev sib piv kev sim 3 nrog kev sim 6, lub ci ci slurry ntxiv nrog cov tshuaj tiv thaiv muaj peev xwm tswj tau qhov viscosity uas tsis muaj viscosity uas tsis muaj hoob ntev ntev. Qhov no yog vim hais tias cov khoom siv tseem ceeb ntawm CMC yog lub suab paj rwb, uas yog cov organic polymes tau yooj yim rau hauv CMC yog tawg los ua cov piam thaj molecules ib los ntawm ib qho. Muab lub zog rau cov microorganisms thiab tso cai rau cov kab mob rau cov me nyuam sai dua. CMC tuaj yeem siv tau raws li kev ncua kev tshem tawm raws nws cov molecular hnyav, yog li tom qab nws yog biodegraded, nws thawj lub cev tuab yuav ploj mus. Cov txheej txheem ntawm kev ua ntawm cov tshuaj tiv thaiv kom tswj tau cov muaj sia nyob ntawm cov kab mob me ntawm cov kab mob me yog feem ntau ua rau pom ntawm qhov tsis sib xws. Firstly, nws cuam tshuam nrog cov enzymes ntawm cov kab mob me, rhuav tshem lawv cov metabolism ntawd, thiab inhibits cov kev ua si ntawm cov enzymes; Thib ob, nws coagulates thiab denatures microbial proteins, cuam tshuam nrog lawv txoj sia nyob thiab rov ua dua tshiab; Thib peb, lub permeability ntawm ntshav memma inhibits cov kev tshem tawm thiab cov metabolism hauv cov tshuaj, ua rau tsis muaj zog thiab hloov pauv. Nyob rau hauv cov txheej txheem ntawm kev siv tshuaj tiv thaiv, peb yuav pom tias cov nyhuv yuav ua rau muaj zog. Ntxiv nrog rau cov khoom lag luam zoo, peb kuj yuav tsum xav txog vim li cas cov kab mob yog vim li cas cov kab mob tau tsim kev tiv thaiv ntev los ntawm kev yug me nyuam thiab tshuaj ntsuam. , yog li ntawd nyob rau hauv cov txheej txheem ntau lawm peb yuav tsum hloov ntau hom tshuaj tiv tshuaj rau ib lub sijhawm.
6. Tus cawv ntawm lub kaw tseg khaws cia ntawm lub ci slurry
Muaj ob lub chaw tseem ceeb ntawm CMC tsis ua tiav. Ib qho yog oxidation tshwm sim los ntawm kev sib cuag nrog huab cua, thiab lwm tus yog cov kab yaig erosion los ntawm kev kis. Lub fws thiab ncua ntawm cov mis thiab dej haus uas peb tuaj yeem pom hauv peb lub neej kuj tseem nyob ruaj khov thiab cmc. Lawv feem ntau muaj lub txee txee ntawm li 1 xyoo, thiab qhov phem tshaj yog 3-6 lub hlis. Qhov laj thawj tseem ceeb yog kev siv cov inactivation kom tsis muaj menyuam siv thiab kaw cia tias qhov ci ci yuav tsum raug muab khi thiab tshwj tseg. Los ntawm kev sib piv ntawm cov phiaj xwm 8 thiab cov phiaj xwm 9, peb tuaj yeem pom tias lub ci pom nyob rau hauv airtight cia tuaj yeem tswj tau ruaj khov rau lub sijhawm ntev dua tsis muaj nag lossis daus. Txawm hais tias qhov ntsuas tau ua rau muaj huab cua, nws tsis tau raws li kev cia siab, tab sis nws tseem muaj lub sijhawm ntev ntev. Qhov no yog vim los ntawm cov ci pom hauv lub hnab ntim khoom cais cov yaig ntawm huab cua thiab cov kab mob thiab ntev lub txee lub neej ntawm methyl.
7. Qhov cuam tshuam ntawm staleness ntawm CMC
Staleness yog cov txheej txheem tseem ceeb hauv GLAZE ntau lawm. Nws lub luag haujlwm tseem ceeb yog ua kom nws muaj pes tsawg leeg ntau yam kev hnav khaub ncaws, tshem tawm cov roj av ntau dua, kom lub ntsej muag tsis muaj pinholes, concave ci thiab lwm yam tsis meej. CMC Polymer Fibers rhuav tshem thaum lub pob milling txheej txheem tau rov ua dua tshiab thiab tus nqi txaus tau nce. Yog li ntawd, nws yog qhov yuav tsum tau ua rau lub sijhawm, tab sis peb yuav tsum tau pom qhov sib npaug ntawm lub sijhawm, feem ntau yog li ntawm 48-72 teev, thiab lwm yam kom siv ntsej muag ci slurry. Hauv kev tsim ntawm ib qho chaw tsim khoom, vim tias kev siv ci ci yog tsawg dua, cov nplawm yog tswj hwm los ntawm lub khoos phis tawm, thiab khaws cia ntawm lub ci ci yog txuas rau 30 feeb. Lub hauv paus ntsiab lus tseem ceeb yog kom tsis muaj zog ntawm hydrolysis tshwm sim los ntawm cmc stirring thiab cua sov thiab kub muaj kev muaj ntawm methyl pawg.
Lub Sijhawm Post: Feb-14-2025