A Novel Graphene Nanoplatelets (GNPs) Dispersant: Polyaryletherketones with Pendent Pyrene Groups

Xu, Da; Gao, Yachen; Sun, Yang; Wang, Zhaoyang; Jiang, Zhenhua; Jiang, Xiangyu; Zhang, Haibo

doi:10.1002/macp.201800553

Cited by 3 publications

(2 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Instead of the pristine GNs, the functionalized GNs, decorated by surface modifier through covalently bonding or non-covalent interactions, are usually produced as nanofillers to improve the immiscibility and dispersion of the GNs in polymer matrices and provide additional functionality for the finally fabricated GNs reinforced PNCs. [14,[28][29][30][31] The oriented arrangement of GNs and the interaction between GNs and polymers is of crucial importance in determining the performance of all aspects. In the previous work of Pang et al, [32] the lightweight polyethylene (PE) composite films reinforced with exfoliated thermally reduced graphene oxide (TrGO) fabricated from by using a roll-to-roll hot-drawing process were shown to possess the excellent mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Physical Origin of Distinct Mechanical Properties of Polymer Tethered Graphene Nanosheets Reinforced Polymer Nanocomposites Revealed by Nonequilibrium Molecular Dynamics Simulations

Zhang

Chen

Liu

2021

Macro Theory & Simulations

View full text Add to dashboard Cite

A non-equilibrium deformation simulation based on standard molecular dynamics is employed to reveal the physical origin of distinct mechanical properties of polymer nanocomposites (PNCs) reinforced by polymer tethered graphene nanosheets (P/G-T). The effect of tethered polymer length (L) and interaction strength on the mechanical properties, including tensile stress, modulus, and yield strength, are examined. The simulation results show that the P/G-T systems exhibit improved mechanical properties as L and interaction strength increases. The strengthening in attractive interaction between matrix polymer and tethered polymer has a better effect on mechanical properties than that between P and graphene nanosheets. It is found that the bond orientation and nonbonding potential is of crucial importance in determining the mechanical properties of the P/G-T nanocomposite systems. The calculations of radial distribution functions and mean-squared displacement are further performed to reveal the physical origin of enhanced mechanical properties, suggesting that the stronger interfacial interactions will induce the closer packing distance with smaller free volume, higher polymer chain entanglement, and higher restriction of polymer chain movement, which synergistically contribute to the improvement in the mechanical properties. The results may provide useful guidance for promoting the development and practical application of the advanced PNCs with excellent performance.

show abstract

Section: Introductionmentioning

confidence: 99%

Physical Origin of Distinct Mechanical Properties of Polymer Tethered Graphene Nanosheets Reinforced Polymer Nanocomposites Revealed by Nonequilibrium Molecular Dynamics Simulations

Zhang

Chen

Liu

2021

Macro Theory & Simulations

View full text Add to dashboard Cite

show abstract

“…Recently, conjugated groups (such as pyrene, naphthalene and carbazole) have attracted extensive attention because of their photoelectric properties and their ability to improve the dispersion of graphene, carbon nanotubes or carbon fiber 16,19,20 . It is worth noting that the effects of introducing low content conjugated groups into copolymers on crystallization and mechanical properties have not been studied deeply.…”

Section: Introductionmentioning

confidence: 99%

Reinforcement of poly(ether ketone) by introducing fluorene groups and their effect on thermal and mechanical properties

Wei

Shang

et al. 2020

Polymer International

Self Cite

View full text Add to dashboard Cite

A series of novel poly(ether ketone) copolymers with different contents of fluorene groups were synthesized. The effects of fluorene group content on the thermal and mechanical properties of poly(ether ketone) copolymers were investigated. The introduction of a low content of fluorene groups can lead to an increase in glass transition temperature, thermal stability and heat deflection temperature. Among them, the heat deflection temperature of 10% fluorene‐containing poly(ether ketone) copolymers (PEK‐FD10) increases from 178 °C (pure poly(ether ketone)) to 196 °C, which means that the material has a higher heat resistance rating. Compared with poly(ether ketone)s, these copolymers have excellent mechanical properties. When the content of fluorene groups is only 2% (PEK‐FD2), the strength is significantly improved. And the flexural strength of PEK‐FD2 is 149.3 MPa, which is 12% higher than that of poly(ether ketone). It is worth noting that the fracture toughness and impact toughness are also increased significantly. The strain at break of PEK‐FD2 is up to 88% and the impact toughness of PEK‐FD2 is 54.6 J m−1. This suggests that the introduction of minute contents of fluorene groups can simultaneously increase the strength and toughness. © 2020 Society of Industrial Chemistry

show abstract

Role of Well-Dispersed Carbon Nanotubes and Limited Matrix Degradation on Tribological Properties of Flame-Sprayed PEEK Nanocomposite Coatings

Man

Lin

et al. 2021

Journal of Tribology

View full text Add to dashboard Cite

High-performance CNTs reinforced polyether ether ketone (CNTs/PEEK) nanocomposites display an excellent combination of mechanical, thermal and tribological properties. It is a challenge to deposit high-performance CNTs/PEEK nanocomposite coatings via the coating techniques based on solution or melting processes due to low solubility and high melting point of PEEK for tribological applications. In this work, the CNTs/PEEK nanocomposite coatings with CNTs contents of 0.1, 0.5, 1.0 and 2.0 wt.% were prepared by flame spraying of mixed PEEK and CNTs powders using mechanical blending (MB) and ultrasound dispersion (UD) methods. The flame sprayed CNTs/PEEK nanocomposite coatings using UD powders preserved good CNTs dispersion, low porosity and surface roughness, adhesive coating-substrate interfaces. The thermal degradation of PEEK ascribed to overheating of in-flight particles and flame-rescanning coatings was limited by good CNTs dispersion in flame spayed CNTs/PEEK nanocomposite coatings with increase of CNT contents. The good dispersion of CNTs aided in initiating crystallization and confined crystalline growth resulting in high crystallinity degree and small crystallite size of PEEK matrix in the flame sprayed CNTs/PEEK nanocomposite coatings. The uniform nanocomposite coatings with well-dispersed CNTs and few PEEK degradation in optimum content of 1.0 wt.% preserved enhanced microhardness and superiorly tribological properties. The well-dispersed CNTs bonding with PEEK matrix enhanced the mechanical strength to restrict the generation of fatigue cracks from defects of voids, which promoted self-lubrication and wear-resistance of flame sprayed CNTs/PEEK nanocomposite coatings.

show abstract

A Novel Graphene Nanoplatelets (GNPs) Dispersant: Polyaryletherketones with Pendent Pyrene Groups

Cited by 3 publications

References 23 publications

Physical Origin of Distinct Mechanical Properties of Polymer Tethered Graphene Nanosheets Reinforced Polymer Nanocomposites Revealed by Nonequilibrium Molecular Dynamics Simulations

Physical Origin of Distinct Mechanical Properties of Polymer Tethered Graphene Nanosheets Reinforced Polymer Nanocomposites Revealed by Nonequilibrium Molecular Dynamics Simulations

Reinforcement of poly(ether ketone) by introducing fluorene groups and their effect on thermal and mechanical properties

Role of Well-Dispersed Carbon Nanotubes and Limited Matrix Degradation on Tribological Properties of Flame-Sprayed PEEK Nanocomposite Coatings

Contact Info

Product

Resources

About