Bipolar surfactants ni surfactants zifite amatsinda ya anionic na cationic hydrophilic.

Muri rusange, amphoteric surfactants ni ibintu bifite amatsinda abiri ya hydrophilic muri molekile imwe, harimo anionic, cationic, na nonionic hydrophilic. Amphoteric surfactants zikunze gukoreshwa cyane ni amatsinda ya hydrophilic afite ammonium cyangwa quaternary ammonium salts mu gice cya cationic na carboxylate, sulfonate, na fosfate mu gice cya anionic. Urugero, amino aside amphoteric surfactants zifite amino n'amatsinda y'ibice muri molekile imwe ni betaine amphoteric surfactants zikozwe mu myunyu y'imbere irimo amatsinda ya quaternary ammonium na carboxyl, hamwe n'ubwoko butandukanye.

Igaragazwa rya surfactants zo mu kirere ritandukanye bitewe n'agaciro ka pH k'umuti wazo.

Kugaragaza imiterere ya surfactants za cationic mu byuma bivanze n'aside; Kugaragaza imiterere ya surfactants za anionic mu byuma bivanze n'aside; Kugaragaza imiterere ya surfactants zitari ionic mu byuma bivanze n'aside. Aho imiterere ya cationic na anionic iringaniye neza yitwa isoelectric point.

Ku gice cya isoelectric, aside amino amphoteric surfactants rimwe na rimwe zihita zigwa, mu gihe aside betaine surfactants zoroshye kugwa no ku gice cya isoelectric.

Ubwoko bwa BetaineIbintu bikoreshwa mu gukora surfactants byabanje gushyirwa mu byiciro by’ibinyabutabire by’umunyu wa ammonium bya quaternary, ariko bitandukanye n’ibinyabutabire by’umunyu wa ammonium bya quaternary, ntabwo bigira anions.
Betaine igumana charge yayo ya molekile nziza n'imiterere ya cationic mu bintu birimo aside na alkaline. Ubu bwoko bwa surfactant ntibushobora kubona charge nziza cyangwa mbi. Hashingiwe ku gaciro ka pH k'umuti w'amazi w'ubu bwoko bw'ibinyabutabire, ni byiza kuyishyira mu cyiciro kitari cyo cy'umuti wa amphoteric surfactant.

Dukurikije iyi ngingo, ibinyabutabire byo mu bwoko bwa betaine bigomba gushyirwa mu cyiciro cya surfactants za cationic. Nubwo bimeze gutyo, abakoresha ibinyabutabire bya betaine benshi bakomeje kubishyira mu cyiciro cya amphoteric. Mu rwego rwa heteroelectricity, hari imiterere ya biphasic mu bikorwa byo hejuru: R-N+(CH3) 2-CH2-COO -.

Urugero rukunze kugaragara rw'ibinyabutabire byo mu bwoko bwa betaine ni alkylbetaine, kandi umusaruro wayo ni N-dodecyl-N, N-dimethyl-N-carboxyl betaine [BS-12, Cl2H25-N+(CH3) 2-CH2COO -]. Betaine ifite amatsinda ya amide [Cl2H25 mu miterere yayo isimbuwe na R-CONH - (CH2) 3-] ifite imikorere myiza.

Ubukana bw'amazi ntabwo bugira ingaruka kubetainesurfactant. Itanga ifuro ryiza kandi ikagira ubuziranenge mu mazi yoroshye n'ayoroshye. Uretse kuba ivanze n'ibinyabutabire bya anionic ku gipimo cya pH kiri hasi, ishobora no gukoreshwa hamwe n'ibinyabutabire bya anionic na cationic. Mu guhuza betaine na surfactant za anionic, viscosity nziza ishobora kugerwaho.