Synthesis and Properties of Lactobionamide-Based Polysiloxane Surfactant

Abstract

Abstract A lactobionamide-based polysiloxane surfactant (LBPS) with well-defined structure was prepared via a two-step method. Structure characterization of the LBPS was performed by Fourier Transform Infrared spectroscopy (FT-IR) and proton nuclear magnetic resonance (1H NMR). Surface activity and aggregation behavior in aqueous solution of the LBPS were investigated by surface tension measurements, dynamic light scattering (DLS) and negative-stain transmission electron microscopy (TEM). The results show that the critical micelle concentration (CMC) and surface tension (γCMC) at the CMC in aqueous solution of the LBPS are 7.7 mg · L−1 and 27.5 mN · m−1, respectively, and the surfactants can self-assemble into spherical micelles with diameters in the range from 30 to 250 nm.