Bipolar surfactants ndi ma surfactants omwe ali ndi magulu a anionic ndi cationic hydrophilic.

Kunena mwachidule, ma amphoteric surfactants ndi mankhwala omwe ali ndi magulu awiri a hydrophilic mkati mwa molekyulu imodzi, kuphatikiza magulu anionic, cationic, ndi nonionic hydrophilic. Ma amphoteric surfactants omwe amagwiritsidwa ntchito nthawi zambiri amakhala magulu a hydrophilic okhala ndi ammonium kapena quaternary ammonium salt mu gawo la cationic ndi mitundu ya carboxylate, sulfonate, ndi phosphate mu gawo la anionic. Mwachitsanzo, ma amino acid amphoteric surfactants okhala ndi amino ndi magulu amagulu mu molekyulu yomweyo ndi betaine amphoteric surfactants opangidwa kuchokera ku mchere wamkati wokhala ndi magulu onse a quaternary ammonium ndi carboxyl, okhala ndi mitundu yosiyanasiyana.

Mawonetsedwe a amphiphilic surfactants amasiyana ndi pH ya yankho lawo.

Kuwonetsa katundu wa cationic surfactants mu acidic TV; Kuwonetsa katundu wa anionic surfactants muzofalitsa zamchere; Onetsani zinthu za non-ionic surfactants mu ndale zapakatikati. Pomwe zinthu za cationic ndi anionic zimayenderana bwino zimatchedwa isoelectric point.

Pa isoelectric point, ma amino acid amtundu wa amphoteric surfactants nthawi zina amawomba, pomwe zotulutsa zamtundu wa betaine sizimagwa mosavuta ngakhale pamalo a isoelectric.

Mtundu wa Betainesurfactants poyamba ankatchedwa quaternary ammonium salt compounds, koma mosiyana ndi quaternary ammonium salt, alibe anions.
Betaine amasunga ma cell ake abwino komanso ma cationic mu media acidic ndi alkaline. Mtundu woterewu wa surfactant sangapeze ndalama zolipiridwa zabwino kapena zoipa. Kutengera kuchuluka kwa pH ya njira yamadzi yamtundu wamtunduwu, ndizomveka kuziyika molakwika ngati amphoteric surfactant.

Malingana ndi mtsutso uwu, mankhwala amtundu wa betaine ayenera kugawidwa ngati cationic surfactants. Ngakhale pali mikangano iyi, ambiri ogwiritsa ntchito betaine akupitiliza kuwayika ngati ma amphoteric compounds. Pamitundu yosiyanasiyana ya heteroelectricity, pali mawonekedwe abiphasic pakuchita pamwamba: R-N+(CH3) 2-CH2-COO -.

Chitsanzo chodziwika bwino cha mtundu wa betaine surfactants ndi alkylbetaine, ndipo mankhwala ake oimira ndi N-dodecyl-N, N-dimethyl-N-carboxyl betaine [BS-12, Cl2H25-N+(CH3) 2-CH2COO -]. Betaine yokhala ndi magulu a amide [Cl2H25 mu dongosolo imasinthidwa ndi R-CONH - (CH2) 3-] ili ndi ntchito yabwino.

Kuuma kwa madzi sikumakhudzabetainesurfactant. Zimatulutsa thovu labwino komanso kukhazikika kwabwino m'madzi onse ofewa komanso olimba. Kuphatikiza pa kuphatikizidwa ndi mankhwala a anionic pamtengo wotsika wa pH, angagwiritsidwenso ntchito limodzi ndi anionic ndi cationic surfactants. Mwa kuphatikiza betaine ndi anionic surfactants, kukhuthala koyenera kungathe kukwaniritsidwa.