Publications by authors named "Cheng-Tian Zhu"
Pickering emulgels stabilized by graphene oxide (GO) with didodecyldimethylammonium bromide (DDAB) as an auxiliary surfactant and liquid paraffin as the oil phase have proved to be an excellent 3D printable ink. This paper elucidates the structure of such emulgels by a combination of microscopy before and after intensive shear as well as broadband dielectric spectroscopy and rheology in the linear and nonlinear regime. An increase of the DDAB surfactant and GO-contents leads to a systematic increase of modulus and viscosity, a reduction of the limits of the nonlinear regime and a more complicated variation of the normal forces, with negative normal forces at high shear rate for low GO-contents and positive normal forces at high GO-contents.
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- The study explores how flexible polymer chains at the interface of cellulose nanofiber (CNF)-based Pickering emulsions affect their rheological and dielectric properties, using liquid paraffin and didodecyldimethylammonium bromide (DDAB) as components.
- Results show that varying the amounts of CNF and DDAB alters droplet size and dispersion, leading to changes in viscosity and yield points, with CNF promoting a network formation and DDAB assisting in solubilizing CNF.
- Polarized optical microscopy and fluorescence analysis reveal distinct behaviors of droplets based on CNF and DDAB content, while broadband dielectric spectroscopy further clarifies the relationship between composition, morphology, and physical interactions within the emulsion system