Double-Chain Cationic Surfactants: Swelling, Structure, Phase Transitions and Additive Effects.

ABSTRACT: Double-chain amphiphilic compounds, including surfactants and lipids, have broad significance in applications like personal care and biology. A study on the phase structures and their transitions focusing on dioctadecyldimethylammonium chloride (DODAC), used inter alia in hair conditioners, is presented. The phase behaviour is dominated by two bilayer lamellar phases, L_β and L_α, with "solid" and "melted" alkyl chains, respectively. In particular, the study is focused on the effect of additives of different polarity on the phase transitions and structures. The main techniques used for investigation were differential scanning calorimetry (DSC) and small- and wide-angle X-ray scattering (SAXS and WAXS). From the WAXS reflections, the distance between the alkyl chains in

SUBMITTER: Goncalves RA 

PROVIDER: S-EPMC8271693 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature