Emulsifier yog ib yam khoom uas muaj peev xwm ua kom sib tov ntawm ob los yog ntau tshaj immiscible Cheebtsam tsim ib tug ruaj khov emulsion.Nws txoj kev txiav txim yog nyob rau hauv tus txheej txheem ntawm emulsion, lub dispersed theem nyob rau hauv daim ntawv ntawm droplets (microns) dispersed nyob rau hauv lub nruam theem, nws txo qhov nro ntawm qhov sib txuas ntawm txhua qhov sib xyaw ua ke, thiab cov tee dej ntws los tsim cov yeeb yaj kiab los yog vim yog tus nqi ntawm emulsifier tau muab rau hauv cov dej ntws ntawm cov hluav taws xob ob txheej txheej, tiv thaiv cov tee dej sib sau ua ke, thiab ua kom zoo ib yam. emulsion.Los ntawm ib theem taw tes ntawm view, lub emulsion yog tseem heterogeneous.The dispersed theem nyob rau hauv lub emulsion yuav ua tau dej theem los yog roj theem, feem ntau yog cov roj theem.The nruam theem yuav yog roj los yog dej, thiab feem ntau ntawm lawv. Yog dej.Ib lub emulsifier yog surfactant nrog ib pawg hydrophilic thiab ib pawg lipophilic nyob rau hauv molecule.In order to express the hydrophilic or lipophilic properties of emulsifier, "hydrophilic lipophilic equilibrium value (HLB value)" feem ntau yog siv.Qhov qis dua tus nqi HLB, qhov muaj zog lipophilic zog ntawm emulsifier.Thiab qhov tsis sib xws, tus nqi HLB siab dua, qhov muaj zog dua hydrophilicity.Various emulsifiers muaj cov nqi sib txawv HLB.Txhawm rau kom tau txais cov emulsion ruaj khov, cov emulsifiers tsim nyog yuav tsum raug xaiv.