Bipolar surfactants bụ surfactants nwere ma anionic na cationic hydrophilic otu.

N'ikwu ya n'ụzọ sara mbara, amphoteric surfactants bụ ogige nwere otu abụọ hydrophilic dị n'ime otu molecule, gụnyere anionic, cationic, na nonionic hydrophilic otu. Amphoteric surfactants ndị a na-ejikarị eme ihe bụ ndị otu hydrophilic nwere ammonium ma ọ bụ quaternary ammonium salts na akụkụ cationic na carboxylate, sulfonate, na phosphate ụdị na akụkụ anionic. Dịka ọmụmaatụ, amino acid amphoteric surfactants nwere amino na akụkụ dị n'otu molekul bụ betaine amphoteric surfactants nke sitere na nnu dị n'ime nke nwere ma quaternary ammonium na carboxyl, nwere ụdị dị iche iche.

Ngosipụta nke amphiphilic surfactants dịgasị iche na uru pH nke ngwọta ha.

Na-egosiputa njirimara nke cationic surfactants na mgbasa ozi acidic; Na-egosiputa ihe onwunwe nke anionic surfactants na mgbasa ozi alkaline; Gosipụta akụrụngwa nke surfactants na-abụghị ionic na mgbasa ozi na-anọpụ iche. Ebe ebe cationic na anionic Properties na-edozi nke ọma ka a na-akpọ ebe isoelectric.

N'ebe isoelectric, ụdị amino acid amphoteric surfactants na-ebuli mgbe ụfọdụ, ebe ụdị betaine surfactants anaghị adị mfe ngwa ngwa ọbụna n'ebe isoelectric.

Ụdị BetaineA na-ekewa ndị surfactants dị ka ogige nnu ammonium nke anọ, mana n'adịghị ka nnu ammonium quaternary, ha enweghị anions.
Betaine na-edobe ụgwọ ọrụ molekụla ya dị mma yana njirimara cationic na mgbasa ozi acidic na alkaline. Ụdị surfactant a enweghị ike ịnweta ụgwọ dị mma ma ọ bụ nke na-adịghị mma. Dabere na uru pH nke ngwọta mmiri nke ụdị onyinye a, ọ bụ ihe ezi uche dị na ya ịkọwa ya dị ka amphoteric surfactant na-ezighi ezi.

Dịka arụmụka a siri dị, ekwesịrị ịkewa ụdị ogige betain dị ka cationic surfactants. N'agbanyeghị arụmụka ndị a, ọtụtụ ndị na-eji ogige betain na-aga n'ihu na-ekewa ha dị ka ogige amphoteric. Na nso nke heteroelectricity, e nwere a biphasic Ọdịdị na elu ọrụ: R-N + (CH3) 2-CH2-COO -.

Ihe atụ kachasị nke ụdị betain surfactants bụ alkylbetain, na ngwaahịa nnọchiteanya ya bụ N-dodecyl-N, N-dimethyl-N-carboxyl betaine [BS-12, Cl2H25-N + (CH3) 2-CH2COO -]. Betaine nwere ndị otu amide [Cl2H25 na nhazi ahụ bụ R-CONH - (CH2) 3-] na-arụ ọrụ ka mma.

Isi ike mmiri anaghị emetụtabetainsurfactant. Ọ na-emepụta ezigbo ụfụfụ na nkwụsi ike dị mma na ma dị nro na mmiri siri ike. Na mgbakwunye na ijikọta ya na ogige anionic na ọnụ ala pH dị ala, a pụkwara iji ya na anionic na cationic surfactants. Site na ijikọta betaine na anionic surfactants, enwere ike nweta viscosity dị mma.