Dab tsi yog Dispersant?

Ib tug dispersant yog ib tug interfacial active neeg sawv cev uas nthuav tawm ob qho tib si oleophilic thiab hydrophilic zog nyob rau hauv ib tug molecule. Nws tuaj yeem sib cais cov khoom thiab cov kua ua kua ntawm cov xim tsis muaj zog thiab cov organic pigments uas nyuaj rau yaj hauv cov kua, thaum tseem tiv thaiv cov khoom me me thiab kev sib sau ua ke, tsim cov amphiphilic reagents xav tau rau kev ncua ruaj khov.

Lub luag haujlwm ntawm dispersants
Lub luag haujlwm ntawm dispersants yog siv wetting dispersants kom txo tau lub sij hawm thiab lub zog yuav tsum tau ua kom tiav cov txheej txheem dispersion, stabilize lub dispersed pigment dispersion, hloov cov khoom nto ntawm cov xim pigment, thiab kho qhov txav ntawm cov xim xim.

Tshwj xeeb yog reflected nyob rau hauv cov nram qab no yam:
1. Txhim kho gloss thiab nce qib theem. Qhov tseeb gloss tsuas yog nyob ntawm qhov tawg ntawm lub teeb los ntawm txheej txheej (piv txwv li qee theem ntawm flatness). Tau kawg, nws yuav tsum tau txiav txim siab los ntawm qhov ntsuas ntsuas seb nws zoo li cas, tsis yog tsuas yog xav txog tus lej thiab cov duab ntawm cov khoom qub, tab sis kuj yog lawv txoj kev sib txuas. Thaum qhov loj me me me dua li ib nrab ntawm qhov teeb meem teeb pom kev zoo (tus nqi no tsis meej), nws tshwm sim raws li lub teeb refracted, thiab cov gloss yuav tsis txhim kho ntxiv, Ib yam li ntawd, lub npog fais fab uas cia siab rau kev tawg los muab lub ntsiab npog lub hwj chim yuav tsis nce (tshwj tsis yog cov pa roj carbon dub uas tsuas yog tso siab rau lub teeb pom kev zoo, cov xim organic tsis nco qab). Lus Cim: Nws yog ib qho nyuaj hais tias qhov teeb meem tshwm sim yog hais txog qhov ntau ntawm lub teeb pom kev; Txawm li cas los xij, nws yuav tsum raug sau tseg tias qhov txo qis ntawm cov khoom hauv ib txwm ua kom txo qis lawv cov viscosity ntawm cov qauv, tab sis qhov nce hauv thaj chaw saum npoo yuav ua rau txo qis ntawm cov dawb resin. Tsis muaj qhov sib npaug, tab sis feem ntau, qhov zoo dua cov hmoov txheej, qhov zoo dua.
2. Tiv thaiv cov xim ntab thiab tawg paj.
3. Txhim kho xim muaj zog. Nco ntsoov tias ntau dua xim lub zog tsis tas yuav zoo dua hauv kev hloov xim tsis siv neeg.
4. Txo viscosity thiab nce pigment loading.
5. Txo flocculation yog zoo li no, tab sis lub finer particle nto zog, qhov siab dua qhov yuav tsum tau rau ib tug dispersant nrog ntau dua adsorption zog. Txawm li cas los xij, dispersants nrog lub zog adsorption siab dhau tuaj yeem ua rau muaj kev cuam tshuam tsis zoo rau txheej txheej.
6. Qhov laj thawj ntawm kev nce kev ruaj ntseg cia yog qhov zoo ib yam li cov saum toj no. Thaum lub zog ruaj khov ntawm cov dispersant tsis txaus, qhov kev ruaj ntseg cia yuav deteriorate (ntawm koj cov duab, tsis muaj teeb meem).
7. Ua kom cov xim sib kis, ua kom cov xim saturation, nce pob tshab (organic pigments) los yog npog lub hwj chim (inorganic pigments).