Bipolar surfactants waa surfactants oo leh labadaba anionic iyo cationic hydrophilic.

Si ballaadhan oo loo hadlo, surfactants amphoteric waa isku dhisyo leh laba kooxood oo hydrophilic ah oo isku mid ah, oo ay ku jiraan anionic, cationic, iyo kooxaha hydrophilic nonionic. Surfactants amphoteric caadi ahaan loo isticmaalo waa inta badan kooxaha hydrophilic oo leh ammonium ama quaternary ammonium cusbada qaybta cationic iyo karboksylate, sulfonate, iyo fosfate noocyada qaybta anionic. Tusaale ahaan, amino acids amphoteric surfactants oo leh amino iyo kooxaha qaybaha isku molecule waa betaine amphoteric surfactants oo laga sameeyay cusbada gudaha oo ka kooban labadaba ammonium quaternary iyo carboxyl, oo leh noocyo badan oo kala duwan.

Muujinta surfactants amphiphilic waxay ku kala duwan tahay qiimaha pH ee xalkooda.

Muujinta sifooyinka cationic surfactants ee warbaahinta acidic; Muujinta sifooyinka surfactants anionic ee warbaahinta alkaline; Ku muuji sifooyinka surfactants-ka aan-ionic warbaahinta dhexdhexaadka ah. Meesha ay guryaha cationic iyo anionic si fiican isugu dheeli tiran yihiin waxaa loo yaqaan barta isoelectric.

Marka la joogo barta isoelectric, nooca amino acid-ka amphoteric surfactants ayaa mararka qaarkood soo da'aya, halka nooca betaine-ka surfactants aysan si fudud u soo da'in xitaa barta isoelectric.

Nooca betaineSurfactants ayaa markii hore lagu sifeeyay inay yihiin xeryahooda milixda ammonium ee afar-geesoodka ah, laakiin si ka duwan milixyada ammonium-ka quaternary, ma laha anions.
Betaine waxa ay ilaalisaa kharashkeeda togan ee molecular iyo sifooyinka cationic ee warbaahinta acidic iyo alkaline. Noocan surfactant ah ma heli karo kharashyo togan ama taban. Iyada oo ku saleysan qiimaha pH ee xalka aqueous ee xarunta noocan oo kale ah, waa macquul in loo kala saaro sida surfactant amphoteric si khaldan.

Marka loo eego doodan, xeryahooda nooca betaine waa in loo kala saaraa sida cationic surfactants. Inkasta oo ay jiraan doodahaas, inta badan isticmaalayaasha isku dhafka betaine waxay sii wadaan inay u kala saaraan xeryahooda amphoteric. In kala duwan ee heteroelectricity, waxaa jira qaab-dhismeedka biphasic ee dhaqdhaqaaqa dusha: R-N + (CH3) 2-CH2-COO -.

Tusaalaha ugu caansan ee nooca betaine surfactants waa alkylbetain, iyo badeecadeeda wakiilku waa N-dodecyl-N, N-dimethyl-N-carboxyl betaine [BS-12, Cl2H25-N + (CH3) 2-CH2COO -]. Betaine oo leh kooxaha amide [Cl2H25 ee qaab dhismeedka waxaa lagu bedelay R-CONH - (CH2) 3-] waxay leedahay waxqabad wanaagsan.

Engegnaanta biyuhu ma saameeyaanbetainsurfactant. Waxay soo saartaa xumbo wanaagsan iyo xasillooni wanaagsan labadaba biyaha jilicsan iyo kuwa adag. Marka laga soo tago in lagu daro xeryahooda anionic ee qiimaha pH hoose, waxa kale oo loo isticmaali karaa iyada oo la isku daro anionic iyo cationic surfactants. Marka la isku daro betaine iyo surfactants anionic, viscosity fiican ayaa la gaari karaa.