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Amphoteric surface active agents

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Author(s): Eissa, A.M. F.

Journal: Grasas y Aceites
ISSN 0017-3495

Volume: 46;
Issue: 4-5;
Start page: 240;
Date: 1995;
Original page

Keywords: Amphoteric surface active agent | Antimicrobial activity | Chemical structure | Surface active properties | Actividad antimicrobiana | Agente tensioactivo anfotérico | Estructura química | Propiedades tensioactivas

ABSTRACT
2-[trimethyl ammonium, triethyl ammonium, pyridinium and 2-amino pyridinium] alkanoates, four series of surface active agents containing carbon chain C12, C14, C16 and C18carbon atoms, were prepared. Their structures were characterized by microanalysis, infrared (IR) and nuclear magnetic resonance (NMR). Surface and interfacial tension, Krafft point, wetting time, emulsification power, foaming height and critical micelle concentration (cmc) were determined and a comparative study was made between their chemical structure and surface active properties. Antimicrobial activity of these surfactants was also determined.Se prepararon cuatro series de agentes tensioactivos del tipo 2-[trimetil amonio, trietil amonio, piridinio y 2-amino piridinio] alcanoatos, que contienen cadenas carbonadas con C12, C14, C16 y C18 átomos de carbono. Se determinaron la tensión superficial e interfacial, el punto de Krafft, el tiempo humectante, el poder de emulsionamiento, la altura espumante y la concentración critica de miscela (cmc) y se hizo un estudio comparativo entre la estructura química y sus propiedades tensioactivas. Se determinó también la actividad antimicrobiana de estos tensioactivos. Estas estructuras se caracterizaron por microanálisis, infrarrojo (IR) y resonancia magnética nuclear (RMN).

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