Wetting thiab dispersing agents feem ntau yog siv los txhim kho cov ntub dej, dispersion, thiab stability ntawm pigments thiab fillers nyob rau hauv dej -raws li emulsion los yog txheej txheej. Kev ntsuas kev ua tau zoo feem ntau suav nrog kev sim ntau yam tsis yog kev ntsuas ntawm ib qho kev ntsuas; cov kev ntsuam xyuas no txiav txim siab tus neeg sawv cev lub peev xwm los ua cov hmoov ntub dej sai, txo qis kev sib tshuam -particle agglomeration, thiab tuav lub xeev ruaj khov dispersion thaum lub sij hawm cia thiab daim ntawv thov.
Kev ua haujlwm ntub dej yog thawj qhov yuav tsum tau soj ntsuam. Ib qho tshwj xeeb ntawm cov xim los yog muab tub lim ntxiv rau hauv qhov system uas muaj ntau npaum li cas ntawm cov ntaub ntub dej thiab cov neeg ua kom tawg. Kev ntsuam xyuas yog ua raws li cov hmoov av ntub dej thaum sib cuag nrog cov kua, txhua yam nyiam ntab, thiab qhov yuav tshwm sim ntawm agglomerate tsim. Cov neeg ua haujlwm zoo pab txhawb kom nrawm nrawm ntawm cov xim los ntawm cov kua, yog li txo cov hmoov ntab thiab clumping. Wetting efficiency tuaj yeem txheeb xyuas los ntawm kev sib piv cov sij hawm ntub dej, kev coj tus cwj pwm sedimentation, thiab dispersion uniformity ntawm cov qauv sib txawv.
Kev ntsuam xyuas kev ruaj ntseg dispersion yog lwm kauj ruam tseem ceeb. Pigments los yog fillers yog dispersed ntawm kev kub ceev nrog cov emulsion, dispersing tus neeg saib xyuas, thiab lwm yam khoom nyob rau hauv tej proportions; lub kaw lus qhov loj me, fineness, viscosity, thiab post- khaws cia mob yog ntsuas. High-cov khoom ua tau zoo tswj cov khoom me me, cov xim xim sib xws thiab txo qis re-agglomeration. Cov kev ntsuas kev ntsuas feem ntau suav nrog kev ua kom zoo, qhov loj me me, kev hloov pauv viscosity, thiab qhov tshwm sim ntawm sedimentation, theem sib cais, lossis coarsening thaum khaws cia. Rau cov dej-raws li hlau txheej emulsions, nws tseem yog ib qho tseem ceeb los saib xyuas seb qhov sib ntxiv ntawm tus neeg sawv cev dispersing cuam tshuam qhov ruaj khov ntawm emulsion nws tus kheej.
Kev sim rau kev tiv thaiv- sedimentation thiab cia ruaj khov kuj tseem yuav ua. Cov qauv txheej npaj tau muab khaws cia rau hauv cov xwm txheej tshwj xeeb rau lub sijhawm teem tseg. Cov dej ntub dej thiab dispersing tus neeg saib xyuas qhov kev koom tes rau ntev - lub sij hawm pigment stability yog soj ntsuam los ntawm kev soj ntsuam cov supernatant, hauv qab sediment, thiab tus qauv tus mob tom qab re- stirring. Tsawg me ntsis sedimentation ua ke nrog mos, yooj yim redispersible sediment feem ntau qhia tau zoo dispersion stability. Rau siab - cov khoom ua tau zoo, kev ntsuas ceev ceev yuav ua tau los sib piv qhov cuam tshuam ntawm cov neeg ua hauj lwm sib txawv ntawm lub cev ntev - lub sij hawm ruaj khov.
Thaum kawg, qhov kev ua tau zoo ntawm cov txheej txheem txheej txheej tau raug soj ntsuam. Standard test panels yog npaj siv cov coatings uas muaj cov neeg sawv cev sib txawv. Cov yeeb yaj kiab raug tshuaj xyuas rau cov xim sib xws, gloss, thiab qib, nrog rau qhov tsis xws luag xws li ntab, dej nyab, thiab cratering. Rau cov tshuab uas muaj cov ntsiab lus pigment siab, kev saib xyuas yuav tsum tau them rau seb cov dispersant tuaj yeem txhim kho tinting zog thiab xim stability. Los ntawm correlating qhov ntau npaum ntawm cov dispersant nrog cov khoom ntawm cov zaj duab xis zaum kawg, ib tug tsim nyog siv ntau yam yuav txiav txim tau.