Li-surfactants tsa bipolar ke li-surfactants tse nang le lihlopha tsa anionic le cationic hydrophilic.

Ka kakaretso, li-surfactants tsa amphoteric ke metsoako e nang le lihlopha tse peli tse phelang ka har'a molek'hule e le 'ngoe, ho kenyeletsoa lihlopha tsa anionic, cationic, le nonionic hydrophilic. Li-surfactants tsa amphoteric tse sebelisoang haholo ke lihlopha tse phelang ka har'a hydrophilic tse nang le letsoai la ammonium kapa quaternary ammonium karolong ea cationic le mefuta ea carboxylate, sulfonate, le phosphate karolong ea anionic. Mohlala, li-surfactants tsa amino acid amphoteric tse nang le lihlopha tsa amino le likarolo ka har'a molek'hule e le 'ngoe ke li-surfactants tsa betaine amphoteric tse entsoeng ka letsoai la ka hare le nang le lihlopha tsa quaternary ammonium le carboxyl, tse nang le mefuta e mengata e fapaneng.

Pontšo ea li-surfactant tse phelang metsing e fapana ho latela boleng ba pH ba tharollo ea tsona.

Ho bonts'a litšobotsi tsa li-surfactants tsa cationic ka har'a asiti; Ho bonts'a litšobotsi tsa li-surfactants tsa anionic ka har'a alkaline; Ho bonts'a litšobotsi tsa li-surfactants tse seng tsa ionic ka har'a media e sa nke lehlakore. Ntlha eo litšobotsi tsa cationic le anionic li leka-lekaneng ka ho phethahetseng e bitsoa ntlha ea isoelectric.

Sebakeng sa isoelectric, li-surfactants tsa mofuta oa amino acid amphoteric ka linako tse ling lia potlaka, ha li-surfactants tsa mofuta oa betaine li sa potlake habonolo esita le sebakeng sa isoelectric.

Mofuta oa BetaineQalong li-surfactants li ne li arotsoe e le metsoako ea letsoai la ammonium ea quaternary, empa ho fapana le letsoai la ammonium la quaternary, ha li na li-anion.
Betaine e boloka tjhaja ya yona ya dimolek'hule le thepa ya cationic mecheng ya asiti le alkaline. Mofuta ona wa surfactant o ke ke wa fumana ditjhaja tse ntle kapa tse mpe. Ho itshetlehile ka boleng ba pH ba tharollo ya metsi ya mofuta ona wa motsoako, ho a utlwahala ho e arola ka tsela e fosahetseng e le surfactant ya amphoteric.

Ho ya ka ngangisano ena, metswako ya mofuta wa betaine e lokela ho arolwa e le di-surfactant tsa cationic. Ho sa tsotellehe mabaka ana, basebedisi ba bangata ba metswako ya betaine ba tswela pele ho e arolwa e le metswako ya amphoteric. Ho ya ka heteroelectricity, ho na le sebopeho sa biphasic mosebetsing wa bokahodimo: R-N+(CH3) 2-CH2-COO -.

Mohlala o tloaelehileng haholo oa li-surfactants tsa mofuta oa betaine ke alkylbetaine, 'me sehlahisoa sa eona se emelang ke N-dodecyl-N, N-dimethyl-N-carboxyl betaine [BS-12, Cl2H25-N+(CH3) 2-CH2COO -]. Betaine e nang le lihlopha tsa amide [Cl2H25 ka har'a sebopeho e nkeloa sebaka ke R-CONH - (CH2) 3-] e na le ts'ebetso e betere.

Bothata ba metsi ha bo amebetainesurfactant. E hlahisa foam e ntle le botsitso bo botle metsing a bonolo le a thata. Ntle le ho kopanngoa le metsoako ea anionic ka boleng bo tlase ba pH, e ka boela ea sebelisoa hammoho le li-surfactant tsa anionic le cationic. Ka ho kopanya betaine le li-surfactant tsa anionic, viscosity e ntle e ka finyelloa.