A5101536303- Polymer Nanocomposites and Properties
- Polymer crystallization and properties
- Granular flow and fluidized beds
- Coal Properties and Utilization
- Theoretical and Computational Physics
- Material Dynamics and Properties
- Geoscience and Mining Technology
- Rock Mechanics and Modeling
- biodegradable polymer synthesis and properties
- Bone Tissue Engineering Materials
- Material Properties and Applications
- Stochastic processes and statistical mechanics
- Fuel Cells and Related Materials
- Advanced Theoretical and Applied Studies in Material Sciences and Geometry
- Rheology and Fluid Dynamics Studies
- High-Velocity Impact and Material Behavior
- Geomechanics and Mining Engineering
- Advanced Polymer Synthesis and Characterization
- Conducting polymers and applications
- Force Microscopy Techniques and Applications
- Aerogels and thermal insulation
- Membrane Separation and Gas Transport
- Soil and Unsaturated Flow
- Characterization and Applications of Magnetic Nanoparticles
- Polymer composites and self-healing
China University of Mining and Technology
2011-2023
Wright-Patterson Air Force Base
2016-2021
Shenyang University of Technology
2015-2019
UES (United States)
2016-2018
Stevens Institute of Technology
2011-2017
United States Air Force Research Laboratory
2016
John Wiley & Sons (United States)
2014
Shanghai University of Sport
2013
Hydrophobic iron oxide nanoparticles grafted with hydrophobic polymer chains of varying molecular weights and graft densities are synthesized to underpin the role brush entanglement dipolar forces on creating nanostructures. Grafting density magnetic is controlled in grafting-to method by changing concentration functionalized solution. The grafting length have varied systemically observe changes Bridging between become effective only at low result long particles. We demonstrate...
Matrix-free assemblies of polymer-grafted nanoparticles (PGNs) enable mechanically robust materials for a variety structural, electronic, and optical applications. Recent quasi-static mechanical studies have identified the key parameters that enhance canopy entanglement promote plasticity PGNs below Tg. Here we experimentally explore high-strain-rate shock impact behavior polystyrene grafted NPs compare their energy absorption capabilities to homopolystyrene film thicknesses ranging from 75...
Injectable biodegradable hydrogels, which can be delivered in a minimally invasive manner and formed situ, have found number of applications pharmaceutical biomedical applications, such as drug delivery tissue engineering. We recently developed an situ crosslinkable citric acid-based poly (ethylene glycol) maleate citrate (PEGMC)/hydroxyapatite (HA) composite, shows promise for use bone In this study, the mechanical properties PEGMC/HA composites were studied dynamic linear rheology...
Nanoparticles functionalized with long polymer chains at low graft density are interesting systems to study structure-dynamic relationships in nanocomposites since they shown aggregate into strings both solution and melts also spheres branched aggregates the presence of free chains. This work investigates structure entanglement effects composites polystyrene-grafted iron oxide nanoparticles by measuring particle relaxations using X-ray photon correlation spectroscopy. Particles within highly...
It is now well-accepted that hydrophilic nanoparticles (NPs) lightly grafted with polymer chains self-assemble into a variety of superstructures when placed in hydrophobic homopolymer matrix or small molecule solvent. Currently, it thought given NP sample should only assemble one kind superstructure depending on the relative balance between favorable core–core attractions and steric repulsion chains. Surprisingly, we find each shows simultaneous formation NP-assemblies, e.g., well-dispersed...
In order to explore the influence of mining fracture lower coal seam previous upper mined in close distance seams, shallow multi-seam XinLiangyou mine county Pu Shanxi Province is selected as study field establish a numerical model seams with RFPA2D. The failure overburden well rule for development and redevelopment studied change vertical stress workface also analyzed. results indicate that: can lead increase height mined, which belong seams; Repeated cause decrease concentration...
The mechanical properties of polymer nanocomposites are significantly affected by spatial ordering nanoparticles (NPs) which can be modified under shear flow fields.
While sulfonated polymers are commonly used in membranes for fuel cells and water filtration applications, challenges of controlling ionic aggregation understanding morphology effects on conductivity transport still remain. In this work, we investigate the copolymer-grafted nanoparticles that designed to form conductive structures with low sulfonation amounts chains. We demonstrate long grafts polystyrene chains end groups side-by-side aggregated strings retain their liquid,...
ABSTRACT It is now well established that controlling the grafted chain lengths and densities on nanoparticle surfaces determines effective interactions between particles, their assembly. Here, we present unusual kinetic results for achieving longer than free chains using reversible addition‐fragmentation transfer (RAFT) polymerization discuss limitations to obtaining polymer grafting density higher ∼0.06 chains/nm 2 . We observe surface initiated grows faster in solution with high RAFT agent...
ABSTRACT To address concern of the dispersion property hydrophilic drugs excess dose loaded in a hydrophobic poly(lactic acid) (PLA) matrix, this work developed PLA and ‐b ‐polyethylene glycol (PEG) composite scaffold ( ) studied its carrier properties for aspirin as model drug. The porous functional scaffolds were prepared from ‐PEG solutions with 5, 10, 15 wt % preloaded. products control samples pure same loading amount comparison characterized by scanning electron microscopy X‐ray...
Journal Article Microscopic Characterization of Fracture Mechanisms in Polystyrene Grafted Nanoparticle Assemblies: The Role Film Thickness and Grafting Density Get access Ming-Siao Hsiao, Hsiao Materials Manufacturing Directorate, Air Force Research Laboratories, WPAFB, OHUES, Inc., Dayton, OH Search for other works by this author on: Oxford Academic Google Scholar Yang Jiao, Jiao Richard A Vaia, Vaia Lawrence F Drummy Microscopy Microanalysis, Volume 22, Issue S3, 1 July 2016, Pages...
In order to enhance the hydrophobicity of polyvinylidene fluoride (PVDF) porous membranes, blending PVDF with a hydrophobic ionic liquid (IL) 1-butyl-3-methylimidazolium hexafluorophosphate ([Bmim][PF6]) was carried out. The modified membranes [Bmim][PF6] were fabricated through non-solvent induced phase inversion using lithium chloride as porogen in casting solution. effects on membrane characteristics investigated. FT-IR analysis indicates that IL is successfully retained by membrane....
Nano-emulsions containing task-special ionic liquid ([NH2ebim][PF6]) were prepared by spontaneous emulsification. The stability of nano-emulsions was investigated analysis droplet size. microstructure the mixed solvent including Triton X-100, n-butanol, and [NH2ebim][PF6] demonstrated based on macular dynamic simulation. results indicate that are relatively stable to growth at static storage, but unstable under high centrifugal force. Simulation from calculation show locates in hydrophobic...
Based on the combination of linear contact model, Coulomb slip model and parallel bond a discret element (DEM) wet granule agglomerates with coating structure is constructed. Disaggregation processes in impacting to horizontal plate are performed by applying particle flow code (PFC). Three failure patterns obtained corresponding those experiment. The variation velocities rupture characteristics liquid bridge disaggregation process investigated. Effects impact velocity, gravity adhered...
Abstract The universal scaling properties of the original and modified versions Villain–Lai–Das Sarma (VLDS) growth system are investigated numerically in both (1 + 1) (2 dimensions. VLDS equation with instability suppression by an exponentially decreasing function is equivalent to infinitely many weakly relevant nonlinear terms (VLDS ∞ ). discussed based on modification system. Our results show that existence could: (i) lead nontrivial behavior a generic way, such as anomalous scaling; (ii)...
Sometimes transportation roadways needed to go through the water-conducted normal fault with high dip and big throw in order ensure mining continuance, two key factors were water deformation of surrounding rock which influenced digging safety stabilization roadways. On base analyzing clearly F B11 2 nd subterranean mine, pingshuo diggings, was drained COMSOL Multiphysics software used simulate destruction rock. The following conclusions drew that larger amount caused single roadway than...
In this paper, both the fifth-order Runge–Kutta numerical scheme and binary collision approximation are used to study phase shift. Both theoretical results shown that solitary wave after head-on propagates along chain behind reference in even odd numbers of grain chains. It is well-known feature appearance Those agreement with experimental results. Furthermore, it found shift not only related position waves, but also where time measured. The value increases nonmonotonously increasing...