Paper Number
GN9                         My Program 

Session
Self-assemblies, Gels and Networks

Title
Structure and dynamics of frictional vs frictionless colloidal gels

Presentation Date and Time
October 20, 2025 (Monday) 2:10

Track / Room
Track 2 / Sweeney Ballroom B

Authors (Click on name to view author profile)

1. Tan, Mingyang (Northeastern University, Department of Mechanical and Industrial Engineering)
2. Jamali, Safa (Northeastern University, Mechanical and Industrial Engineering)

Author and Affiliation Lines (in printed abstract book)
Mingyang Tan and Safa Jamali
Mechanical and Industrial Engineering, Northeastern University, Boston, MA 02115

Speaker / Presenter 
Tan, Mingyang

Keywords
colloids; gels; networks; selft-assemblies

Text of Abstract
Functional materials of diverse types can be fabricated through dispersions of colloids. The properties of the materials at the macroscopic scale originate from the microscopic features and, ultimately, to the particle level, including the surface functionality and surface topography of the particles. In most studies, the interactions between particles are modeled to be central, where attractive/repulsive forces are aligned with the centerline between two particles. However, in cases where particles having rough surfaces, noncentral forces (e.g., friction) become influential. In this presentation, I will discuss the formation of space-spanning particulate networks of attractive frictional and frictionless colloids, with an emphasis on the structural features of the resulting gels and their network characteristics. This is followed by rheological characterization of the gels and correlating the microscopic features and forces to macroscopic mechanics of the system.