Embedded Files
Beyond Empirical Trends
Beyond Empirical Trends
Research at PRIME Lab is driven by a fundamental principle: macroscopic mechanical performance is a direct manifestation of structural and molecular mobility across diverse length and time scales.
We do not rely on simple phenomenological curve-fitting. Instead, we combine high-resolution experimental mechanics with rigorous mathematical modelling to establish a quantitative, mechanism-based understanding of material behaviour. By embedding realistic service conditions—ranging from the physiological environment of the human mouth to high-frequency electromagnetic fields—into our nanoscale testing protocols, we ensure our fundamental insights translate directly to applied engineering.
Research Motivation & Problem Context
Research Motivation & Problem Context
While PRIME Lab is fundamentally driven, our research questions are strictly informed by the practical constraints encountered in real-world material systems. Considerations such as long-term durability, environmental exposure, and time-dependent deformation actively guide the design of our experiments and the interpretation of our results.
By embedding realistic service conditions into nanoscale mechanical testing, we ensure that the fundamental insights we obtain remain directly relevant to polymer-based biomaterials, functional devices, and surface-engineered systems—all without compromising scientific depth.
Core Research Themes
Core Research Themes
Nanomechanics & Viscoelastic Modeling of Polymers of Polymer Materials
Nanomechanics & Viscoelastic Modeling of Polymers of Polymer Materials
Time-dependent deformation and interfacial effects frequently limit the long-term reliability of polymer nanocomposites. Our lab specializes in interrogating these exact limitations at the nanoscale.
Dynamic Creep Characterization: We utilize dynamic nanoindentation to map interphase stiffness gradients, extract delayed modulus, and calculate localized viscosity.
Advanced Mathematical Modeling: Standard models (like Kelvin-Voigt or Burgers) often fail to capture the full spectrum of polymer deformation. We actively develop novel mathematical frameworks—such as our recent hybrid joint viscoelastic models—to accurately predict long-term stress relaxation, creep, and ageing behavior in polymer networks (e.g., PMMA/TiO₂ nanocomposites).
Damage Quantification: We quantitatively map the degradation of nanomechanical properties (Young’s Modulus and hardness) directly around static damage zones and structural flaws.
Polymer Materials for Biological Applications
Polymer Materials for Biological Applications
Amorphous polymers used in clinical settings are subjected to complex, cyclic physiological stresses. We investigate the physical origins of mechanical instability and degradation in these biomaterials.
Curing Kinetics & Microstructure: We analyze how specific curing parameters (temperature and pressure) fundamentally alter the degree of conversion, molecular free volume, and resulting mechanical strength of dental polymers.
Ageing & Durability Prediction: By applying our time-dependent viscoelastic models to load-hold-unload nanoindentation data, we can predict the long-term physical "ageing" and dimensional stability of heat-cured PMMA denture bases over extended service periods.
Sustainable Bio-fillers: We are actively developing and mechanically evaluating novel polymer composites reinforced with bio-fillers derived from agricultural waste for sustainable dental applications.
Electronic Interfaces & Functional Materials
Electronic Interfaces & Functional Materials
We engineer non-metallic, flexible polymer composites designed for the rigorous demands of modern electronics, communication systems, and aerospace technologies.
Absorption-Dominated EMI Shielding: Our research targets electromagnetic interference (EMI) shielding mechanisms in the GHz frequency range. We elucidate the distinct roles of dielectric polarization, interfacial loss, and multiple scattering driven by well-engineered filler-matrix interfaces.
Tailored Dielectric Responses: We optimize filler type, dispersion state, and loading fractions to maximize shielding effectiveness without sacrificing the mechanical flexibility or toughness of the polymer matrix.
Polymer Multilayer Systems: We investigate the fabrication and optical characterization of multilayer polymer thin films. By precisely engineering the refractive index of constituent layers, we aim to develop functional terahertz tags for sophisticated optical data encoding and information storage.
Methodology: How We Extract Data
Methodology: How We Extract Data
We maintain rigorous standards for reproducibility, quantitative analysis, and physical interpretation. Our core analytical workflow includes:
Advanced Nanomechanical Characterisation: Moving beyond basic hardness testing, we execute complex micro-loading rate assessments (e.g., 20 to 200 µN/s) and extended load-hold dynamic nanoindentation protocols to extract precise depth-time data for viscoelastic modelling.
Correlative Microstructural Mapping: We do not just image surfaces; we correlate specific microstructural features (via SEM) and chemical conversions (via XRD/Raman spectroscopy) directly to localised mechanical performance and filler dispersion states.
Collaborative Theoretical Validation: To build a complete structural picture, we actively partner with theoretical physicists to utilize ab initio computational tools, such as Density Functional Theory (DFT). This allows us to link our experimental mechanical yield data directly to the fundamental electronic structure of the nanocomposites.
Nanoindentation
Electron Microscopy Technique
Laminated Interface Analysis
Ongoing and Future Directions
Ongoing and Future Directions
Science is never static. As we continue to push the boundaries of materials characterization and predictive modeling, our current and near-future research roadmap includes:
Ageing-Induced Evolution: Tracking the long-term evolution of nanomechanical properties in complex polymer systems.
Interface-Controlled Deformation: Investigating fundamental deformation mechanics at the interfaces of hybrid materials.
Time-Dependent Failure: Mapping the localized, time-dependent failure mechanisms specifically within polymer-based biomaterials under physiological loads.
Coatings for Harsh Environments: Developing mechanically optimized, polymer-derived coatings designed for extreme environmental exposure.
Report abuse