A5024668336- Graphene research and applications
- Fiber-reinforced polymer composites
- Carbon Nanotubes in Composites
- Boron and Carbon Nanomaterials Research
- 2D Materials and Applications
- Advanced Sensor and Energy Harvesting Materials
- Force Microscopy Techniques and Applications
- Silk-based biomaterials and applications
- Diamond and Carbon-based Materials Research
- Advanced Materials and Mechanics
- MXene and MAX Phase Materials
- Supercapacitor Materials and Fabrication
- Nanowire Synthesis and Applications
- High-Velocity Impact and Material Behavior
- Anodic Oxide Films and Nanostructures
- Advancements in Battery Materials
- Nanopore and Nanochannel Transport Studies
- High-pressure geophysics and materials
- Structural Analysis and Optimization
- Mechanical Behavior of Composites
- Hydrogels: synthesis, properties, applications
- Graphene and Nanomaterials Applications
- Elasticity and Wave Propagation
- Lubricants and Their Additives
- Nanomaterials for catalytic reactions
Wuhan University
2019-2024
Tsinghua University
2022
Synthetic high-performance fibers present excellent mechanical properties and promising applications in the impact protection field. However, fabricating with high strength toughness is challenging due to their intrinsic conflicts. Herein, we report a simultaneous improvement strength, toughness, modulus of heterocyclic aramid by 26%, 66%, 13%, respectively, via polymerizing small amount (0.05 wt%) short aminated single-walled carbon nanotubes (SWNTs), achieving tensile 6.44 ± 0.11 GPa,...
High dynamic strength is of fundamental importance for fibrous materials that are used in high-strain rate environments. Carbon nanotube fibers one the most promising candidates. Using a strategy to optimize hierarchical structures, we fabricated carbon with 14 gigapascals (GPa) and excellent energy absorption. The performance attributed simultaneous breakage individual nanotubes delocalization impact occurs during loading process; these behaviors due improvements interfacial interactions,...
Abstract By virtue of remarkable biocompatibility and their promising applications in biomedical fields, biomass‐regenerated fibers, such as wool keratin fiber cellulose fiber, have attracted extensive attention. However, the insufficient mechanical performance still hinders yarn manufacturing capability further large‐scale applications. Herein, an ultra‐strong ultra‐tough regenerated by regulating conformation with high‐quality small‐size graphene (HQSGr) training treatment (M‐HQSGr‐RWKF)...
With impressive individual properties, carbon nanotubes (CNTs) show great potential in constructing high-performance fibers. However, the tensile strength of as-prepared nanotube fibers (CNTFs) by floating catalyst chemical vapor deposition (FCCVD) is plagued weak intertube interaction between essential CNTs. Here, we developed a chlorine (Cl)/water (H2O)-assisted length furtherance FCCVD (CALF-FCCVD) method to modulate CNTs and enhance mechanical macroscopic The acquired CALF-FCCVD an...
<p>Hydrogels featuring randomly networked matrix typically show poor mechanical strength owing to the weak interchain interactions of matrix. Encouragingly, stretchability and toughness hydrogel materials along a certain direction were recently improved an unprecedented level with design structured oriented matrix, realization excellent concurrently isotropic performance for hydrogels now become next- research goal. Herein, self-assembling process poly(vinyl alcohol) (PVA)...
Abstract As a typical kind of high‐performance fibers, heterocyclic aramid fibers are widely used to reinforce resins prepare advanced lightweight composites with high mechanical performances. However, their poor interfacial shear strength limits the combination and leads undesirable composites. Thus, tensile highly desired. Herein, 40.04 ± 2.41 MPa 5.08 0.24 GPa reported, in which nitrile‐modified poly‐(benzimidazole‐terephthalamide) polymer chains crosslinked by azide‐functionalized...
Abstract Structural superlubricity (SSL) is a state of contact with no wear and ultralow friction. SSL has been characterized at van der Waals (vdW) layered materials, while its stability under extreme loading conditions not assessed. By designing both self-mated non-self-mated vdW contacts materials chosen for their high strengths, we report outstanding robustness very pressures in experiments. The incommensurate between graphite interfaces can maintain the pressure lower than 9.45 GPa,...
The rapid development of two-dimensional (2D) materials has significantly broadened the scope 2D science in both fundamental scientific interests and emerging technological applications, wherein mechanical properties play an indispensably key role. Nevertheless, particularly challenging is ultrathin nature that makes their manipulations characterizations considerably difficult. Herein, thanks to excellent flexibility vanadium disulfide (VS2) sheets, susceptibility out-of-plane deformation...
A new graphyne with high stability, excellent flexibility and carrier mobility is theoretically predicted as a promising anode material for lithium-ion batteries capacity.
Abstract Graphene possesses extraordinary mechanical, electronic, and thermal properties, thus making it one of the most promising building blocks for constructing macroscopic high performance multifunctional materials. However, common material strength–ductility paradox also appears in carbon-nanoarchitected materials some key mechanical performance, example, tensile strength graphene-based materials, are still far lower than that graphene. Inspired by exceptional silk protein benefiting...
Abstract Phosphorene, a two-dimensional material that can be exfoliated from black phosphorus, exhibits remarkable mechanical, thermal, electronic, and optical properties. In this work, we demonstrate the unique structure of pristine phosphorene endows with exceptional quantum-mechanical performance by using first-principles calculations. Upon charge injection, maximum actuation stress is 7.0 GPa, corresponding to strain as high 36.6% over seven times larger than graphene (4.7%) comparable...
Structural superlubricity has attracted increasing interest in modern tribology. However, experimental identification of superlubric interfaces among the vast number heterojunctions is a trial-and-error and time-consuming approach. In this work, based on requirements in-plane stiffnesses layered materials interfacial interactions at sliding incommensurate for structural superlubricity, we propose criteria predicting between heterojunctions. Based these criteria, identify 61 with potential...
Abstract Two-dimensional (2D) materials are promising candidates for uses in next-generation electronic and optoelectronic devices. However, only a few high-quality 2D have been mechanically exfoliated to date. One of the critical issues is that exfoliability from their bulk precursors unknown. To assess potential counterparts, we derived an elasticity-based-exfoliability measure based on exfoliation mechanics model. The proposed has clear physical meaning universally applicable all material...
The alloy catalysts have been introduced in synthesizing highly oriented and monolayer graphene because of the combination excellent features different metals. However, precise manipulation nucleation growth stages on surface has not realized thus fabrication large-sized 2D crystal arrays met with limited success. Under this circumstance, quest for novelty attracting intensive efforts. Herein, introduction a liquid Cu–Ag alloy, engineering achieved. Moreover, by properly modulating...
Herein, we developed a bead-spring model to predict the Poisson’s ratios of two-dimensional hexagonal materials under finite strains. The predicted strain-dependent were supported by simulations. bounds on strains (-1/3, +∞) established. underlying mechanism for was uncovered as interplay between bond stretching and angle bending during stretching. These findings indicate that, even simplified material system strains, there is no upper bound ratios, that plenty room strain-engineering ratios.
The fabrication of nanotips has been driven by the increasing industrial demands in developing high-performance multifunctional nanodevices. In this work, we proposed a controlled, rapid as well low cost nanomolding-necking technology to fabricate gold arrays. geometries having cone angle range ∼28-77° and curvature radii <5 nm can be prepared tailoring diameters raw nanorods nanomolding process or modulating necking temperature. Molecular dynamics simulation reveals that formation nanotip...
Abstract Multilayer graphene exhibits strong mechanical anisotropy in the nonlinear elastic regime, and tuning this without damaging is a tough challenge. In work, we propose an efficient strategy to tune of multilayer via interlayer twist. The orientation-dependent strain–stress curve monolayer described analytical form, which further generalized for predicting twisted by introducing twist-induced “phase shift.” These predictions are supported atomistic simulations. It found that can be...
Abstract Structural superlubricity (SSL) is a state of contact between two sliding surfaces with no wear and ultralow friction. SSL has been characterized at contacts van der Waals (vdW) layered materials, while its robustness under high pressure not assessed. Here we report experimental results showing that incommensurate vdW interfaces graphite can maintain the lower than 9.45 GPa, tungsten tip substrate remains stable up to 3.74 even higher strength most solids. Beyond this critical...
Abstract Synthetic high-performance fibers, such as polyaramid have attracted particular attention owing to their excellent mechanical properties and promising applications in safety protection fields. However, fabricating fibers with high strength toughness is challenging due intrinsic conflicts. Herein, we report a simultaneous improvement of heterocyclic aramid by 26% 66%, respectively, via situ polymerizing small amount (0.05 wt%) short aminated single-walled carbon nanotube (SWNT) into...