Enhanced thermal and mechanical properties of epoxy composites by mixing noncovalently functionalized graphene sheets

Zeng, Cen; Lu, Shaorong; Xiao, Xiane; Gao, Jian; Pan, Leilei; He, Zihai; Yu, Jinhong

doi:10.1007/s00289-014-1280-5

Cited by 54 publications

(37 citation statements)

References 40 publications

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“…The results of R TIM and thermal conductivity suggest that self‐assembled TrGO‐PA resulted in a simultaneous improvement in interfacial interaction and thermal transfer capacity. Compared with previous reports, the self‐assembled TrGO‐PA hybrid showed a better enhancement of thermal properties for the same amount of TrGO.…”

Section: Resultsmentioning

confidence: 99%

Tailored interphase and thermal interface resistance of self‐assembled thermally reduced graphene oxide–polyamide hybrid/epoxy composites with enhanced thermal conductivity

et al. 2019

J of Applied Polymer Sci

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Thermally reduced graphene oxide–polyamide (TrGO‐PA) hybrids were fabricated by self‐assembly between TrGO nanosheets and PA microparticles, and the dispersibility, interphase extension, and thermal conduction mechanism of TrGO‐PA/epoxy (EP) composites were investigated. Most of the oxygen‐containing functional groups of TrGO were removed, and a conjugated structure of graphene was recovered. TrGO was distributed evenly on the PA surface via electrostatic adsorption between TrGO and PA, which resulted in the inhibition of TrGO aggregation in the epoxy matrix. Compared with that of TrGO/EP and PA/EP composites, the thermal interface resistance (RTIM) of TrGO‐PA/EP composites was greatly decreased to 38.3 mm2 kW−1 and the thermal conductivity was improved to 0.268 W/(m K), which was attributed to the enhanced dispersibility of TrGO‐PA and the enlarged interphase in TrGO‐PA/EP composites. A schematic model of thermal conduction mechanisms was proposed based on the formation of contiguous thermal transfer pathways by bridged TrGO adsorbed on well‐dispersed PA microparticles in TrGO‐PA/EP composites. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47826.

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Section: Resultsmentioning

confidence: 99%

Tailored interphase and thermal interface resistance of self‐assembled thermally reduced graphene oxide–polyamide hybrid/epoxy composites with enhanced thermal conductivity

et al. 2019

J of Applied Polymer Sci

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“…3,19,22 Aer that, 500 mg RGO dispersed in 20 ml chloroform solution under sonication for 30 min. And then, 500 mg LCPBI were added, followed by other 30 min of sonication.…”

Section: Synthesis Of Lcpbi-functionalized Reduced Graphene Oxide (Lcmentioning

confidence: 99%

Enhanced thermal properties in a hybrid graphene–alumina filler for epoxy composites

Zeng

Song

et al. 2015

RSC Adv.

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In this report, we synthesized a new kind of liquid-crystal perylenebisimide polyurethane (LCPBI).Noncovalently functionalized reduced graphene oxide (RGO) with LCPBI was prepared via p-p stacking interactions. The noncovalently functionalized graphene nanosheets (LCPBI/RGO) were used to improve the thermal properties of epoxy composites, with modified Al 2 O 3 nanoparticles (Al 2 O 3 -APS) which were grafted with a silane coupling agent . We demonstrated that the thermal conductivity of the epoxy composites could be improved by hybrid LCPBI/RGO and Al 2 O 3 -APS fillers. For instance, the thermal conductivity of the epoxy composite with 30 wt% Al 2 O 3 -APS and 0.3 wt% LCPBI/RGO was 0.329 W m À1 K À1 , increased by 105.6% compared to that of the pure epoxy (0.16 W m À1 K À1 ). Meanwhile the glass transition temperature and storage modulus of epoxy composites with increasing hybrid fillers was improved, as well as the a-relaxation apparent activation energy.

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“…The tensile strength was measured on a universal tensile tester of type RGT-5 according to National Standard of China (GB1040-92). The tensile rate was 10 mm min 21 .The melt flow rate (MFR) tests were conducted on a SRZ-400E MFR instrument. Thermogravimetric analysis (TGA) was performed on a NETZSCH STA-449 at a heating rate of 108C min 21 under nitrogen.…”

Section: Characterizationmentioning

confidence: 99%

“…Thermogravimetric analysis (TGA) was performed on a NETZSCH STA-449 at a heating rate of 108C min 21 under nitrogen. Differential scanning calorimetry (DSC) was conducted on a NETZSCH DSC-204 at a heating rate of 108C min 21…”

Section: Characterizationmentioning

confidence: 99%

Enhanced mechanical and thermal properties of polypropylene/cellulose fibers composites with modified tannic as a compatibilizer

Yang

Luo

et al. 2016

Polymer Composites

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A novel compatibilizer tannic grafted poly(12‐hydroxy stearate) (TA‐g‐PHS) was synthesized using tannic and 12‐hydroxystearic acid as raw materials through the esterification reaction. The compatibilizer was used to improve the compatibility between polypropylene (PP) and microcrystalline cellulose fibers (MCF). The impact strength and tensile strength of MCF/PP composites modified with the TA‐g‐PHS were 38.51 kJ/m2 and 30.45 MPa when the content loading of TA‐g‐PHS is 3 wt% and MCF is 10 wt%, which were improved by 40.5% and 76.9%, respectively, compared to the MCF/PP composites alone. The melt flow rate improved with the addition of TA‐g‐PHS. And the thermal properties have slightly improved. Moreover, the SEM images of the fracture surfaces display that MCF is relatively well dispersed in the PP matrix by adding TA‐g‐PHS. It can be inferred that the PP and MCF matrix interfacial bonding was strengthened. POLYM. COMPOS., 39:2036–2045, 2018. © 2016 Society of Plastics Engineers

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Enhanced thermal and mechanical properties of epoxy composites by mixing noncovalently functionalized graphene sheets

Cited by 54 publications

References 40 publications

Tailored interphase and thermal interface resistance of self‐assembled thermally reduced graphene oxide–polyamide hybrid/epoxy composites with enhanced thermal conductivity

Tailored interphase and thermal interface resistance of self‐assembled thermally reduced graphene oxide–polyamide hybrid/epoxy composites with enhanced thermal conductivity

Enhanced thermal properties in a hybrid graphene–alumina filler for epoxy composites

Enhanced mechanical and thermal properties of polypropylene/cellulose fibers composites with modified tannic as a compatibilizer

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