A5100361667- Polymer Nanocomposites and Properties
- Polymer crystallization and properties
- Polymer composites and self-healing
- Carbon Nanotubes in Composites
- Advanced Sensor and Energy Harvesting Materials
- Conducting polymers and applications
- Advanced Polymer Synthesis and Characterization
- Graphene research and applications
- Material Dynamics and Properties
- Dielectric materials and actuators
- Polymer Surface Interaction Studies
- Block Copolymer Self-Assembly
- Force Microscopy Techniques and Applications
- Pickering emulsions and particle stabilization
- biodegradable polymer synthesis and properties
- Rheology and Fluid Dynamics Studies
- Polymer Nanocomposite Synthesis and Irradiation
- Tribology and Wear Analysis
- Electrospun Nanofibers in Biomedical Applications
- Supramolecular Self-Assembly in Materials
- Surface Modification and Superhydrophobicity
- Surfactants and Colloidal Systems
- Phase Equilibria and Thermodynamics
- Thermal properties of materials
- Silicone and Siloxane Chemistry
Beijing University of Chemical Technology
2016-2025
Inner Mongolia University of Technology
2020-2024
Anhui University of Science and Technology
2024
Chinese Academy of Sciences
2007-2024
University of Chinese Academy of Sciences
2012-2024
University of South China
2024
Donghua University
2017-2024
Northwestern Polytechnical University
2013-2024
University of Science and Technology Beijing
2024
Aluminum Corporation of China (China)
2024
Interfacial interaction is one of the most critical issues in carbon nanotube/polymer composites. In this paper role nonionic surfactant investigated. With as processing aid, addition only 1 wt % nanotubes composite increases glass transition temperature from 63 °C to 88 °C. The elastic modulus also increased by more than 30%. contrast, without has moderate effects on and mechanical properties. This work points pathways improve dispersion modify interfacial bonding
The scaling behavior of the elastic properties colloidal gels that are well above gelation threshold is studied both theoretically and experimentally. A theory was developed by considering structure gel network as a collection flocs, which fractal objects closely packed throughout sample. Two regimes found based on relative value constant interfloc links to flocs. In strong-link (interfloc) regime, increases but limit linearity decreases with increasing particle concentration, whereas in...
Surfactant or polymer directed self-assembly has been widely investigated to prepare nanostructured metal oxides, semiconductors, and polymers, but this approach is mostly limited two-phase materials, organic/inorganic hybrids, nanoparticle polymer-based nanocomposites. Self-assembled nanostructures from more complex, multiscale, multiphase building blocks have with success. Here, we demonstrate a ternary using graphene as fundamental construct ordered oxide−graphene A new class of layered...
It is a great challenge to fully understand the microscopic dispersion and aggregation of nanoparticles (NPs) in polymer nanocomposites (PNCs) through experimental techniques. Here, coarse-grained molecular dynamics adopted study mechanisms spherical NPs melts. By tuning polymer–filler interaction wide range at both low high filler loadings, we qualitatively sketch phase behavior PNCs structural spatial organization fillers mediated by polymers, which emphasize that homogeneous exists just...
Nano-strengthening by employing nanoparticles is necessary for high-efficiency strengthening of elastomers, which has already been validated numerous researches and industrial applications, but the underlying mechanism still an open challenge. In this work, we mainly focus our attention on studying variation tensile strength nanofilled elastomers gradually increasing filler content, within a low loading range. Interestingly, percolation phenomenon observed in relationship between loading,...
Molecular dynamics simulations are used to investigate the diffusion process of nanoparticles in polymer melts. The effects size, concentration, and mass particle, chain length, polymer−particle interaction on particles melts also explored. Our simulated results indicate that gyration radius is key factor determining validity Stokes−Eintsein(SE) relation describing particle at infinite dilution. When size larger than chain, SE formula can predict correctly, does not show dependence. smaller...
An advanced elastomer was developed by incorporating a dual-dynamic network into <italic>cis</italic>-polyisoprene, which combines excellent mechanical properties with high self-healing capability.
Molecular dynamics simulations have been performed to study the effects of cross-link density and distribution on network topology, dynamic structural properties, tensile mechanical viscoelastic properties chemically cross-linked polymers. Simulation results show that introduction cross-links slows chain down thus leads a slight increase in glass transition temperature. Improving dispersion state is found be essentially equivalent increasing effective density, as reflected topological...
Realizing and manipulating a fine dispersion of silica nanoparticles (NPs) in the polymer matrix is always great challenge. In this work, we first successfully synthesized N,N′-bis[3-(triethoxysilyl)propyl-isopropanol]-propane-1,3-diamine (TSPD), which was new interface modifier, aiming to promote NPs. Through Fourier transform infrared spectroscopy, nuclear magnetic resonance analysis, mass verified that TSPD contains together six ethoxy groups at its two ends. Then, used modify pure NPs,...
Recyclability and reprocessability of permanently cross-linked polymeric materials have received considerable scientific technological attention in view the environmental pollution sustainable development. By introducing dynamic covalent bonds, vitrimers are emerging as a promising attempt to address this pressing challenge. However, there is still lack thermodynamic kinetic understanding bond exchange reactions (BERs) at molecular level. Herein, by employing coarse-grained dynamics...
Attributed to its strain-induced crystallization (SIC), natural rubber (NR) exhibits more excellent mechanical properties compared other elastomeric materials and has been attracting numerous scientific technological attention. However, a systematical understanding of the structure–mechanics relation NR is still lacking. Herein, for first time, we employ molecular dynamics simulation examine effects key structural factors on SIC at level. We phospholipid protein mass fraction (ω), strength...
Lignin, the most abundant aromatic polymer in nature, is one of promising renewable feedstocks for value-added products. However, it challenging to prepare high-performance and multifunctional materials with lignin because its poor compatibility elastomer matrix. In fact, often requires solvent fractionation, chemical modification, or prohibitively expensive additives. This work develops a cost-effective strategy ionomeric composites based on commercial carboxyl high content without...
Elastomers inevitably suffer scratches and damage during the application; thus, design fabrication of self-healing elastomers with covalent adaptive networks is a meaningful strategy to extend service life materials. In this study, facile two-step approach was proposed synthesize based on dynamic oxime–carbamate bonds. Hydroxyl-terminated polybutadiene first reacted isophorone diisocyanate prepolymer isocyanate groups terminated, followed by further reaction dimethylglyoxime as chain...
We investigated the thermodynamic processes of two-dimensional (2D) metallo-supramolecular self-assembly at molecular resolution using scanning tunneling microscopy and variable-temperature low-energy electron diffraction. On a Au(111) substrate, tripyridyl ligands coordinated with Cu in twofold Cu-pyridyl binding mode or Fe threefold Fe-pyridyl mode, forming 2D open network structure each case. The structures exhibited remarkable thermal stability (600 K for Cu-coordinated 680...
By tuning the polymer–filler interaction, filler size and loading, we use a coarse-grained model-based molecular dynamics simulation to study interfacial structural (the orientations at bond, segment chain length scales, conformation), dynamic stress–strain properties. Simulated results indicate that region is composed of partial segments different polymer chains, which consistent with experimental presented by Chen et al. (Macromolecules, 2010, 43, 1076). Moreover, it found within one...
By employing an idealized model of a polymer network and filler, we have investigated the stress-strain behavior by tuning filler loading polymer-filler interaction in broad range. The simulated results indicate that there actually exists optimal volume fraction (between 23% 32%) for elastomer reinforcement with attractive interaction. To realize this reinforcement, rubber-filler should be slightly stronger than rubber-rubber interaction, while excessive chemical couplings are harmful to...