A5101706966- Polymer Nanocomposites and Properties
- Rheology and Fluid Dynamics Studies
- Adhesion, Friction, and Surface Interactions
- Tribology and Wear Analysis
- Synthesis and properties of polymers
- Polymer composites and self-healing
- Silicone and Siloxane Chemistry
- Phase Equilibria and Thermodynamics
- Advanced Fiber Optic Sensors
- Advanced Physical and Chemical Molecular Interactions
- Nanofabrication and Lithography Techniques
- Tree Root and Stability Studies
- High voltage insulation and dielectric phenomena
- Force Microscopy Techniques and Applications
- Medical Imaging Techniques and Applications
- Advanced Sensor and Energy Harvesting Materials
- Advanced Surface Polishing Techniques
- Dielectric materials and actuators
- Mesoporous Materials and Catalysis
- Bamboo properties and applications
- Polymer crystallization and properties
- Epoxy Resin Curing Processes
- Cancer Treatment and Pharmacology
- Natural Fiber Reinforced Composites
- Lung Cancer Treatments and Mutations
Shenzhen Institutes of Advanced Technology
2015-2016
University of Chinese Academy of Sciences
2015-2016
Chinese Academy of Sciences
2016
Jiangsu University
2016
Shenzhen Technology University
2015
Carnegie Mellon University
2005-2008
Bimodal silica nanospheres were prepared in one pot and used as reinforcement fillers to modify epoxy resins.
Abstract Rheology and tribology become more critical issues in order to satisfy the harsh requirements for ultra‐small head/media spacing HDDs. In this communication, MD simulations with a bead/spring model were employed examine nano‐rheological response of nonfunctional functional PFPEs by analyzing shear viscosity nanoscale PFPE films relaxation processes as function wall interaction/separation endgroup functionality. Our simulation results indicate that thin show solid‐like behavior,...
Molecular rheology of perfluoropolyether (PFPE) systems is particularly important in designing effective lubricants that control the friction and wear tribological applications. Using coarse-grained, bead-spring model, equilibrium molecular dynamics based on Langevin equation a quiescent flow was first employed to examine nanostructure PFPE. Further, by integrating modified imposing Lees-Edwards boundary condition, nonequilibrium steady shear investigated. We observe viscosity PFPE system...
Due to the increased packaging density as well size reduction of gap between chip and substrate in modern flip-chip technology, there is an increasing demand for use nanosized silica particles fillers into underfill further improve its comprehensive performance. However, nanoparticles (SNPs) cannot uniformly disperse polymer matrix usually cause some negative issues, such a dramatic increase viscosity significant decrease glass transition temperature result their excessive surface energy...
Rheological properties of perfluoropolyether (PFPE) systems can be particularly important in designing effective lubricants that control the friction and wear their tribological applications. Using equilibrium/nonequilibrium molecular dynamics (MD) simulation, we examined rheological PFPE lubricant, such as viscosity viscoelastic properties, by observing time-dependent system shear motion. Strong dependence bulk on structure (e.g., end group functionality) external conditions temperature)...
Molecular rheology of perfluoropolyether (PFPE) systems can be particularly important in designing effective lubricants that control the friction and wear their tribological applications. Using equilibrium/nonequilibrium molecular dynamics simulation, we examined viscoelastic properties PFPE melts under oscillatory shear, such as dynamic moduli viscosity, by monitoring time-dependent strain-stress curve. Strong dependences melt viscoelasticity on architecture (e.g., endgroup functionality)...
The advances of flip-chip technology have driven the development both underfilling processes and underfill materials. With flip chip scaling to fine pitch small gaps, nano-sized filler has become an alternative choice conventional micron-sized for applications. On one hand, due large surface area nanofiller, polymer based nanocomposites exhibite improved mechanical performance optical transmission properties than their microcomposites counterpart with same loading. While on other poorly...
In this paper, humidity effects on the relaxation of perfluoropolyether (PFPE) films were examined by bonded fraction and surface energy measurements. MD simulation with a bead-spring model was also performed. The calculated time for functional PFPE molecule in film found to be shorter at high humidity, which is consistent experimental results.
The bulk rheological properties, such as shear viscosity and storage & loss moduli of perfluoropolyether (PFPE) with different molecular weights endgroup functionalities were examined via a rotational rheometer. Equilibrium non-equilibrium dynamics simulations performed to provide visualization tool clearly understand the intrinsic nanostructure well predict viscosity, which reveals strong dependence on temperature PFPE architecture.
As the bump diameter and pitch of flip chip packages getting smaller, application nanosilica in underfill has been an inevitable trend. However, reducing filler particle size will cause server issues, such as serious agglomeration polymer matrix significant increase viscosity, which lower flowability deteriorate other properties underfill. In order to address this problem take full advantages positive effects on properties, a new kind silica nanospheres with bimodal distribution synthesized...