Significantly enhanced and precisely modeled thermal conductivity in polyimide nanocomposites with chemically modified graphene <i>via in situ</i> polymerization and electrospinning-hot press technology

Guo, Yue; Xu, Genjiu; Yang, Xin; Ruan, Kunpeng; Ma, Tengbo; Zhang, Qiuyu; Gu, Junwei; Wu, Yalan; Liu, Hu; Guo, Zhanhu

doi:10.1039/c8tc00452h

Cited by 389 publications

(177 citation statements)

References 86 publications

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“…the fillers were randomly oriented completely. For such a case, Guo et al have recently reported a scheme to convert the three components of anisotropic thermal conductivity (

K_{e f f, 11}, K_{e f f, 22}, and K_{e f f, 33}

) into an overall isotropic thermal conductivity ( K′ ). This scheme was derived from plane source method for measuring the thermal conductivity and therefore only suitable for the particular measurement method.…”

Section: Calibration and Validation Of The Modelmentioning

confidence: 99%

Design and development of thermally conductive hybrid nano‐composites in polysulfone matrix

et al. 2018

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A percolating network of hybrid fillers can provide significant synergic enhancement of thermal conductivity in polymer matrix composites. Especially, when platelets and fibers of high aspect ratios are mixed to form a percolating network, the percolation thresholds are small. However, the optimum ratio of platelets to fibers must be acquired for the maximum synergic enhancement. In this work, polysulfone (PSU) matrix‐hybrid fillers composite is designed with high thermal conductivity using a computational model. The calibration of computational model with several experimentally measured thermal conductivities of polymer matrix‐hybrid nanocomposites leads to the composition where maximum synergic effect/maximum thermal conductivity is expected. For the specific PSU–Graphene nano‐platelets (GNPs)/Carbon nano‐tubes (CNTs) hybrid composites synthesized in this study, the composition with maximum thermal conductivity as designed by the model is PSU/8.4% GNPs/1.6% CNTs. The samples produced experimentally around this composition have shown close agreement with the predictions of the model. Sensitivity analyses and parametric studies conducted on the model highlight that the dimensional parameters and the interface resistance of the fillers are the most sensitive to enhance the effective thermal conductivity. POLYM. COMPOS., 40:1419–1432, 2019. © 2018 Society of Plastics Engineers

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“…the fillers were randomly oriented completely. For such a case, Guo et al have recently reported a scheme to convert the three components of anisotropic thermal conductivity (

K_{e f f, 11}, K_{e f f, 22}, and K_{e f f, 33}

Section: Calibration and Validation Of The Modelmentioning

confidence: 99%

Design and development of thermally conductive hybrid nano‐composites in polysulfone matrix

et al. 2018

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“…Multiscale CFs grafted with PVA or PEG were used as the base material for the synthesis of the PVA/ CF /epoxy and PEG/ CF /epoxy resin hybrid composites by compression molding. The epoxy resin and hardener H‐256 (weight ratio 100: 32) were mixed and stirred for 5 min.…”

Section: Methodsmentioning

confidence: 99%

Enhancing the Interfacial Properties of Composites by Grafting Polyethylene Glycol and Polyvinyl Alcohol Onto a CF Surface

Zhan

et al. 2019

Polymer Engineering & Sci

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In this study, a carboxy esterification reaction was used to graft the hydrophilic polymers polyethylene glycol (PEG) and polyvinyl alcohol (PVA) onto the surface of carbon fibers (CFs). The properties of the grafted CFs were investigated by scanning electron microscopy (SEM), atomic force microscopy (AFM), X‐ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TG) and through the measurement of interlaminar shear strength (ILSS). SEM enabled the graft morphology on CF surfaces to be determined. In comparisons of grafted and non‐grafted CFs, AFM indicated that the roughness was significantly improved; XPS showed that the concentration of oxygen‐containing functional groups increased by 186.1%; TG showed that the grafting rate of CF‐grafted PEG (CF‐g‐PEG) was 0.5%, and that of CF‐grafted PVA (CF‐g‐PVA) was 2.0%; and the ILSS of CF‐g‐PEG and CF‐g‐PVA increased by 22.7% and 43.0%, respectively. We conclude that esterification grafting is an effective method for modifying the physicochemical properties of CFs and improving the interfacial adhesion of composites. POLYM. ENG. SCI., 59:1043–1050, 2019. © 2019 Society of Plastics Engineers

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“…[50] Taking spherical nanoparticles reinforced ICPs for an example, Figure 3 illustrates the fabrication of core-shell structured conductive PNCs using in situ chemical polymerization. [50] Taking spherical nanoparticles reinforced ICPs for an example, Figure 3 illustrates the fabrication of core-shell structured conductive PNCs using in situ chemical polymerization.…”

Section: In Situ Polymerizationmentioning

confidence: 99%

Multifunctions of Polymer Nanocomposites: Environmental Remediation, Electromagnetic Interference Shielding, And Sensing Applications

et al. 2020

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Polymer nanocomposites (PNCs), i. e. nanofillers dispersed in a polymer matrix, have become a prominent area of current research promoted by rapid developments in the polymer science and nanotechnology. As a promising alternative to conventional composites which are reinforced with micro-scale fillers, PNCs exhibit substantially improved overall performance and simplified processing at much lower nanofiller loadings. PNCs have great potentials for a broad range of applications, e. g. environmental remediation, energy storage/conversion, transportation, and national defense. In this regard, the most recent advances in PNCs for the environmental remediation, electromagnetic interference (EMI) shielding and sensing & actuation applications are presented. Challenges and perspectives of PNCs are also discussed. Polymer matrixesWith an almost unlimited selection of monomers, oligomers, and chemistries available, a myriad of polymer matrixes with tuned physiochemical properties (i. e. molecular structure, chemical stability, flame retardancy, abrasion resistance, transparency, and conductivity) for versatile applications can be designed. [9] For example, linear-structured thermoplastic polymers (i. e. polyethylene, polypropylene, polystyrene, poly(methyl methacrylate), polyvinyl chloride, polyamides, polyether sulfone, and polyetherether ketone) can be reshaped and recycled via various processing techniques such as injection molding, compression molding, and extrusion upon heating. Thermoplastic polymers find their wide applications such as drinking water bottles, grocery bags, household food covering, etc. [10] On the contrast, thermosetting polymers with three-dimensional network of bonds (i. e. epoxy, phenol-formaldehyde, ureaformaldehyde) cannot be melted or reshaped after curing, and are often featured with high mechanical strength and stiffness. [11] Therefore, thermosetting polymers are more suitable for high-temperature applications.[a] Dr.

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Significantly enhanced and precisely modeled thermal conductivity in polyimide nanocomposites with chemically modified graphene via in situ polymerization and electrospinning-hot press technology

Abstract: Significantly improved thermal conductivities and a more accurate thermal conductivity model were achieved.

Cited by 389 publications

References 86 publications

Design and development of thermally conductive hybrid nano‐composites in polysulfone matrix

Design and development of thermally conductive hybrid nano‐composites in polysulfone matrix

Enhancing the Interfacial Properties of Composites by Grafting Polyethylene Glycol and Polyvinyl Alcohol Onto a CF Surface

Multifunctions of Polymer Nanocomposites: Environmental Remediation, Electromagnetic Interference Shielding, And Sensing Applications

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