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

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

Pontšo ea li-amphiphilic surfactants e fapana ho ea ka boleng ba pH ba tharollo ea bona.

Ho bonts'a thepa ea li-surfactants tsa cationic mecheng ea litaba tsa acidic; Ho bonts'a thepa ea li-anionic surfactants mecheng ea litaba tsa alkaline; Hlahisa thepa ea li-non-ionic surfactants mecheng ea litaba e sa nke lehlakore. Ntlha eo thepa ea cationic le anionic e leka-lekaneng ka ho phethahetseng e bitsoa ntlha ea isoelectric.

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

Mofuta oa betaineLi-surfactants qalong li ne li khetholloa e le metsoako ea letsoai ea quaternary ammonium, empa ho fapana le letsoai la quaternary ammonium, ha li na li-anion.
Betaine e boloka tefiso e ntle ea limolek'hule le thepa ea cationic mecheng ea litaba tsa acidic le alkaline. Mofuta ona oa surfactant o ke ke oa fumana litefiso tse ntle kapa tse mpe. Ho ipapisitsoe le boleng ba pH ba mokelikeli o nang le metsi oa mofuta ona oa motsoako, hoa utloahala ho o arola ka mokhoa o fosahetseng e le setsi sa amphoteric.

Ho ea ka khang ena, metsoako ea mofuta oa betaine e lokela ho aroloa e le li-surfactants tsa cationic. Leha ho na le likhang tsena, basebelisi ba bangata ba betaine ba ntse ba tsoela pele ho li khetholla e le metsoako ea amphoteric. Mofuteng oa heteroelectricity, ho na le sebopeho sa biphasic mosebetsing oa holimo: R-N+(CH3) 2-CH2-COO -.

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

Ho thatafala ha metsi ha ho 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 tlaase ba pH, e ka boela ea sebelisoa hammoho le li-anionic le cationic surfactants. Ka ho kopanya betaine le li-surfactants tsa anionic, viscosity e ntle e ka finyelloa.