xov xwm

Dispersant yog ib qho tshuaj interfacial active uas muaj ob yam khoom sib txawv ntawm lipophilicity thiab hydrophilicity hauv lub molecule.

Kev tawg yog hais txog qhov sib xyaw ua ke los ntawm kev tawg ntawm ib yam khoom (lossis ntau yam khoom) mus rau lwm yam khoom hauv daim ntawv ntawm cov khoom me me.

Cov tshuaj dispersants tuaj yeem sib xyaw cov khoom khov thiab kua ntawm cov inorganic thiab organic pigments uas nyuaj rau yaj hauv cov kua, thiab tseem tiv thaiv kev sib xyaw thiab kev sib sau ua ke ntawm cov khoom me me, tsim cov amphiphilic reagents uas xav tau rau kev ncua ruaj khov. Houhuan tshuaj R & D thiab kev tsim cov dej-raws li additives thiab roj-raws li additives hauv ntau yam lag luam, cuam tshuam nrog surfactant pawg.

Lub kaw lus dispersion muab faib ua: kua, colloid thiab suspension (emulsion). Rau cov kua, solute yog ib qho dispersant thiab solvent yog ib qho dispersant. Piv txwv li, hauv NaCl kua, tus dispersant yog NaCl, thiab tus dispersant yog dej. Tus dispersant hais txog cov khoom tawg ua tej daim me me hauv lub kaw lus dispersion. Lwm yam khoom hu ua dispersed substance.

Cov haujlwm ntawm kev siv cov tshuaj dispersant hauv kev lag luam yog raws li nram no:

1. Siv cov tshuaj ntub dej kom txo lub sijhawm thiab lub zog uas yuav tsum tau ua kom tiav cov txheej txheem dispersion, tswj cov dispersed pigment dispersed, PP adhesion promoter, hloov kho cov khoom ntawm cov xim pigment, thiab kho qhov txav mus los ntawm cov xim pigment.

2. Txo qhov kev sib txhuam ntawm cov kua-kua thiab cov khoom khov-kua. Cov tshuaj dispersants kuj yog surfactants. Cov tshuaj dispersants yog anionic, cationic, non-ionic, amphoteric thiab polymeric. Ntawm lawv, hom anionic yog siv feem ntau.

3. Dispersant yog ib yam khoom siv pab uas tuaj yeem txhim kho kev sib kis ntawm cov khoom khov lossis kua.