Ua ntej, lub hauv paus ntsiab lus ntawm kev sib tov
Los ntawm nplawm cov hniav thiab cov thav duab revolving kom tig ib leeg, lub tshuab raug tshem tawm yog tsim thiab khaws cia, thiab kev hloov pauv loj ntawm cov kua thiab cov theem ua tau zoo dua qub. Kev ntxhov siab-kua kua feem ntau yog muab faib ua cov hauv qab no: (1) tshem tawm cov khoom siv; (2) resuspension ntawm cov khoom seem; (3) infiltration ntawm suspended hais rau hauv cov kua; (4) siv ntawm cov khoom thiab nruab nrab ntawm cov khoom thiab paddles Lub zog ua rau cov particle agglomerates disperse los yog tswj cov particle loj; (5) qhov loj hloov ntawm cov kua thiab khoom.
Qhov thib ob, cov nyhuv stirring
Cov txheej txheem sib xyaw ua ke tau sib xyaw ntau yam hauv slurry ua ke hauv tus qauv piv los npaj cov slurry kom yooj yim txheej txheej thiab xyuas kom meej qhov sib xws ntawm cov ncej. Cov khoom xyaw feem ntau muaj tsib txheej txheem, xws li: pretreatment, blending, wetting, dispersion thiab flocculation ntawm raw cov ntaub ntawv.
Thib peb, slurry parameters
1, viscosity:
Qhov kev tiv thaiv ntawm cov kua dej mus rau qhov ntws yog txhais raws li tus nqi ntawm cov kev ntxhov siab xav tau ntawm 25 px 2 lub dav hlau thaum cov kua ntws ntawm tus nqi ntawm 25 px / s, hu ua kinematic viscosity, hauv Pa.s.
Viscosity yog ib yam khoom ntawm cov kua. Thaum cov kua dej ntws hauv cov raj xa dej, muaj peb lub xeev ntawm laminar flow, transitional flow, thiab turbulent flow. Peb lub xeev no kuj tseem muaj nyob rau hauv cov khoom siv nplawm, thiab ib qho ntawm qhov tseem ceeb ntawm kev txiav txim siab cov xeev no yog viscosity ntawm cov kua.
Thaum lub sijhawm nplawm, nws feem ntau suav hais tias qhov viscosity tsawg dua 5 Pa.s yog cov kua viscosity tsawg, xws li: dej, castor roj, qab zib, jam, zib ntab, roj lubricating, tsawg viscosity emulsion, thiab lwm yam.; 5-50 Pas yog cov kua nruab nrab viscosity Piv txwv li: number case, tshuaj txhuam hniav, thiab lwm yam; 50-500 Pas yog cov kua viscosity siab, xws li zom cov pos hniav, plastisol, roj khoom, thiab lwm yam.; Ntau tshaj 500 Pas yog cov kua viscosity siab ntxiv xws li: roj hmab sib tov, yas yaj, organic Silicon thiab lwm yam.
2, Particle loj D50:
Qhov luaj li cas ntawm cov particle loj ntawm 50% los ntawm qhov ntim ntawm cov khoom hauv slurry
3, cov ntsiab lus khoom:
Qhov feem pua ntawm cov khoom siv hauv slurry, qhov theoretical piv ntawm cov ntsiab lus ntawm cov khoom yog tsawg dua cov khoom ntawm cov khoom xa tuaj
Plaub, qhov ntsuas ntawm kev sib xyaw ua ke
Ib txoj hauv kev los txheeb xyuas qhov sib xws ntawm kev sib xyaw thiab sib xyaw ntawm cov khoom siv-kua ncua kev kawm:
1, kev ntsuas ncaj qha
1) Txoj kev viscosity: piv txwv los ntawm ntau txoj haujlwm ntawm lub cev, ntsuas qhov viscosity ntawm slurry nrog viscometer; qhov me me qhov sib txawv, qhov sib txawv ntau qhov sib xyaw;
2) Particle method:
A, piv txwv los ntawm ntau txoj haujlwm ntawm lub kaw lus, siv cov khoom me me los saib xyuas qhov loj me ntawm cov slurry; qhov ze ntawm qhov loj me me yog qhov loj ntawm cov khoom siv hmoov, qhov sib xyaw ntau dua qhov sib xyaw;
B, piv txwv los ntawm ntau txoj haujlwm ntawm lub kaw lus, siv lub laser diffraction particle loj tester los soj ntsuam qhov me me ntawm slurry; qhov ntau dua qhov particle loj faib, qhov me dua qhov loj dua, qhov sib xyaw ntau dua qhov sib xyaw;
3) Txoj kev sib nqus tshwj xeeb: piv txwv los ntawm ntau txoj haujlwm ntawm lub cev, ntsuas qhov ntom ntawm slurry, qhov me dua qhov sib txawv, qhov sib txawv ntawm qhov sib xyaw.
2. Kev ntsuas tsis ncaj
1) Cov txheej txheem cov ntsiab lus (macroscopic): Kev kuaj los ntawm ntau txoj haujlwm ntawm lub cev, tom qab qhov tsim nyog kub thiab lub sijhawm ci, ntsuas qhov hnyav ntawm cov khoom, qhov me dua qhov sib txawv, qhov sib txawv ntawm qhov sib xyaw;
2) SEM / EPMA (microscopic): piv txwv los ntawm ntau txoj haujlwm ntawm lub cev, siv rau lub substrate, qhuav, thiab saib cov khoom lossis cov ntsiab lus hauv zaj duab xis tom qab ziab cov slurry los ntawm SEM (electron microscope) / EPMA (electron probe) Distribution ; (system solids feem ntau yog cov khoom siv conductor)
Tsib, anode stirring txheej txheem
Conductive carbon dub: Siv los ua tus neeg sawv cev. Muaj nuj nqi: Txuas cov khoom siv loj loj kom ua tau zoo.
Copolymer latex - SBR (styrene butadiene roj hmab): siv los ua cov ntawv khi. Lub npe tshuaj: Styrene-Butadiene copolymer latex (polystyrene butadiene latex), dej-soluble latex, cov ntsiab lus 48 ~ 50%, PH 4 ~ 7, khov taw tes -5 ~ 0 ° C, boiling point txog 100 ° C, cia kub 5 ~ 35 ° C. SBR yog ib qho anionic polymer dispersion nrog zoo mechanical stability thiab operability, thiab muaj ib tug siab daim ntawv cog lus lub zog.
Sodium carboxymethyl cellulose (CMC) - (carboxymethyl cellulose sodium): siv ua thickener thiab stabilizer. Cov tsos mob yog dawb los yog daj daj floc fiber ntau hmoov los yog hmoov dawb, tsw ntxhiab, saj tsis qab, tsis muaj tshuaj lom; soluble nyob rau hauv dej txias los yog dej kub, tsim ib tug gel, cov tshuaj yog nruab nrab los yog me ntsis alkaline, insoluble nyob rau hauv ethanol, ether, organic solvent xws li isopropyl cawv los yog acetone yog soluble nyob rau hauv ib tug 60% aqueous tov ntawm ethanol los yog acetone. Nws yog hygroscopic, ruaj khov rau lub teeb thiab cua sov, viscosity txo nrog qhov kub thiab txias, qhov kev daws teeb meem ruaj khov ntawm pH 2 txog 10, PH qis dua 2, cov khib nyiab yog precipitated, thiab pH siab dua 10. Cov xim hloov kub yog 227 ° C, carbonization kub yog 252 ° C, thiab nto nro ntawm 2% aqueous tov yog 71 nm / n.
Lub anode stirring thiab txheej txheej txheem yog raws li nram no:
Thib rau, cathode stirring txheej txheem
Conductive carbon dub: Siv los ua tus neeg sawv cev. Muaj nuj nqi: Txuas cov khoom siv loj loj kom ua tau zoo.
NMP (N-methylpyrrolidone): siv los ua cov kuab tshuaj nplawm. Lub npe tshuaj: N-Methyl-2-polyrrolidone, molecular mis: C5H9NO. N-methylpyrrolidone yog cov kua ammonia me ntsis uas yog miscible nrog dej hauv txhua qhov kev faib ua feem thiab yuav luag tag nrho cov kuab tshuaj (ethanol, acetaldehyde, ketone, aromatic hydrocarbon, thiab lwm yam). Qhov kub ntawm qhov kub ntawm 204 ° C, ib qho flash point ntawm 95 ° C. NMP yog ib tug polar aprotic hnyav uas tsis muaj toxicity, siab boiling point, zoo heev solubility, selectivity thiab stability. Dav siv nyob rau hauv aromatics extraction; purification ntawm acetylene, olefins, diolefins. Cov kuab tshuaj siv rau cov polymer thiab nruab nrab rau polymerization yog tam sim no siv nyob rau hauv peb lub tuam txhab rau NMP-002-02, nrog ib tug purity ntawm> 99.8%, ib tug tshwj xeeb lub ntiajteb txawj nqus ntawm 1.025 ~ 1.040, thiab ib tug dej ntsiab lus ntawm <0.005% (500ppm. ).
PVDF (polyvinylidene fluoride): siv los ua cov thickener thiab khi. Dawb hmoov crystalline polymer nrog tus txheeb ze ntom ntawm 1.75 txog 1.78. Nws muaj qhov zoo heev UV tsis kam thiab huab cua tsis kam, thiab nws cov yeeb yaj kiab tsis nyuaj thiab tawg tom qab muab tso rau sab nraum zoov rau ib lossis ob xyoo lawm. Cov khoom dielectric ntawm polyvinylidene fluoride yog qhov tshwj xeeb, qhov dielectric tas li yog siab li 6-8 (MHz ~ 60Hz), thiab dielectric poob tangent kuj loj, txog 0.02 ~ 0.2, thiab lub ntim kuj yog qis dua, uas yog 2. × 1014Ω NaN. Nws siv sijhawm ntev kub yog -40 ° C ~ + 150 ° C, hauv qhov ntsuas kub no, cov khoom siv polymer muaj cov khoom siv zoo. Nws muaj qhov hloov pauv iav kub ntawm -39 ° C, qhov kub thiab txias ntawm -62 ° C los yog tsawg dua, crystal melting point ntawm txog 170 ° C, thiab thermal decomposition kub ntawm 316 ° C lossis ntau dua.
Cathode stirring thiab txheej txheej txheem:
7. Viscosity yam ntxwv ntawm slurry
1. Curve ntawm slurry viscosity nrog stirring lub sij hawm
Raws li lub sij hawm stirring yog txuas ntxiv, lub viscosity ntawm slurry nyhav ib tug ruaj khov tus nqi tsis hloov (nws yuav hais tau tias cov slurry tau uniformly dispersed).
2. Curve ntawm slurry viscosity nrog kub
Qhov siab dua qhov kub, qhov qis dua qhov viscosity ntawm slurry, thiab viscosity nyhav rau tus nqi ruaj khov thaum nws nce mus txog qhov kub thiab txias.
3. Curve ntawm cov ntsiab lus ntawm cov hloov tank slurry nrog lub sij hawm
Tom qab cov slurry yog stirred, nws yog piped mus rau lub hloov tank rau Coater txheej. Lub tank hloov pauv yog nplawm kom tig: 25Hz (740RPM), kiv puag ncig: 35Hz (35RPM) kom ntseeg tau tias qhov tsis sib xws ntawm slurry ruaj khov thiab yuav tsis hloov pauv, suav nrog pulp. Cov khoom kub, viscosity thiab cov ntsiab lus ruaj khov kom ntseeg tau tias muaj kev sib luag ntawm slurry txheej.
4, lub viscosity ntawm slurry nrog lub sij hawm nkhaus
Post lub sij hawm: Oct-28-2019