Main Classification Ntawm Cov Khoom Noj Emulsifiers
Oct 25, 2020
Ntxiv rau qhov loj thiab cov duab ntawm pawg alkyl, qhov sib txawv ntawm cov khoom ntawm emulsifier yog feem ntau cuam tshuam rau qhov sib txawv ntawm pawg hydrophilic. Qhov kev hloov ntawm hydrophilic pab pawg muaj ntau dua li qhov ntawm cov pab pawg hydrophobic. Yog li no, kev faib tawm ntawm emulsifier feem ntau ua raws cov qauv ntawm hydrophilic pawg, uas yog, raws li hom ion.
1. Ionic emulsifier:
Thaum cov emulsifier yaj nyob rau hauv dej, nws yog hu ua ionic emulsifier, yog tias cov emulsifier yaj hauv dej thiab cuam tshuam rau hauv cation me me thiab pawg loj dua anion nrog rau pawg hydrocarbon, thiab pawg anionic ua raws li emulsifier. Yog hais tias emulsifier yog yaj nyob rau hauv dej, nws yuav tsim cov qhov quav me thiab cov cation loj dua Cov emulsifier no hu ua cationic emulsifier. Amphoteric emulsifier molecule tseem muaj li ntawm lipophilic non-polar part thiab hydrophilic polar ib feem. Ib feem hydrophilic ncov qaumteb qabteb muaj ob qho piv txwv thiab cations.
Hauv kev lag luam ionic emulsifier, anionic emulsifier yog thawj qhov kev tsim kho, ntau tshaj plaws ntau lawm, feem ntau hom thiab feem ntau muaj kev vam meej kev lag luam. Cov tshuaj anionic emulsifiers feem ntau siv hauv kev lag luam khoom noj khoom haus yog alkyl carboxylate, phosphate, thiab lwm yam. Cationic emulsifier tsis tshua muaj siv hauv kev lag luam khoom noj khoom haus.
2. Nonionic emulsifier: cov tsis muaj kev emulsifier tsis yog ionized hauv dej. Thaum nws tau yaj nyob rau hauv dej, hydrophobic thiab hydrophilic pawg rau tib lub molecule ua si lub luag haujlwm ntawm lipophilic thiab hydrophilic feem. Nws yog vim tias qhov tsis-ionic emulsifier tsis ionize nyob rau hauv dej thiab tsis tsim ions, uas ua rau cov tsis-ionic emulsifier muaj kev ua tau zoo dua li ntawm ionic emulsifier hauv qee qhov chaw.
Kev faib tawm saum toj no yog ua raws cov qauv hauv kev hloov ntawm emulsifiers. Hauv qhov tseeb ntau lawm, tseem muaj kev faib raws li tus kwv tij zog ntawm hydrophilic thiab lipophilic emulsifiers, suav nrog (O / W) emulsifiers thiab lipophilic emulsifiers. Feem ntau hais lus, emulsions nrog muaj zog hydrophilicity mas tsim cov roj hauv dej (0, / W) emulsions, thiab cov emulsions nrog cov muaj zog lipophilic muaj zog ua cov dej hauv cov roj (w / O) emulsions. Txawm li cas los xij, nws yuav tsum tau taw qhia tias thaum emulsifier yog siv los npaj emulsion, nws tsis tsuas yog cuam tshuam los ntawm emulsifier nws tus kheej, tab sis kuj cuam tshuam los ntawm cov khoom sib xyaw, pH tus nqi thiab qhov kub ntawm 8 ℃.
