Chemical functionalization of graphene oxide for improving mechanical and thermal properties of polyurethane composites

Jing, Qifei; Liu, Wanshuang; Pan, Yujun; Silberschmidt, Vadim V.; Li, Lin; Dong, Zhi Li

doi:10.1016/j.matdes.2015.07.101

Cited by 101 publications

(55 citation statements)

References 45 publications

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“…To the other nanocomposites (DPU/TNT 3 and 5%) the Young's modulus were higher with values of 326 ± 18 and 399 ± 35 MPa, respectively. The increase in the Young's modulus with increase in the filler amount is in concomitance with literature and, besides that, the decrease in the maximum deformation. Improvement in mechanical properties were attributed to the good dispersion of filler in the PU matrix, as well as the strong interfacial interactions between them.…”

Section: Resultssupporting

confidence: 88%

Thermal, Mechanical, and Morphological Properties of DPU/Titanate Nanotubes Nanocomposites

Lima

Monteiro

Hoffmann

et al. 2019

Macromolecular Symposia

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Nanocomposites of Titanates Nanotubes (TNTs) and waterborne polyurethane were prepared by physical mixture using ultra turrax disperser. TNTs were synthesized by hydrothermal method and added in different contents: 1, 3, and 5% w/w in relation to polymer weight. Films were prepared and characterized by DSC, TGA, DMA and SEM. The increase of fillers content reduced the thermal stability of DPU nanocomposites compared to pure DPU and did not modify the glass transition temperature. To mechanical properties, the addition of 3% and 5% of TNT increased the Young's modulus when compared with pure DPU, but nanocomposite with 1% of TNT presented a decrease in Young's modulus. The stress × strain curves of DPU/TNT 5% presented characteristic behavior of rigid material, with low deformation, unlike other nanocomposites and pure DPU. SEM and TGA analysis proves that the preparation method used promoted the incorporation and good filler dispersion in the polymer matrix.

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Section: Resultssupporting

confidence: 88%

Thermal, Mechanical, and Morphological Properties of DPU/Titanate Nanotubes Nanocomposites

Lima

Monteiro

Hoffmann

et al. 2019

Macromolecular Symposia

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“…Reduced graphene oxide produced by this method is characterized by a low number of oxygen functional groups. This implicates that RGO has a better compatibilization effect on the matrix than pure graphene, and it can be easily dispersed in the composite systems [21][22][23][24][25][26][27][28]. RGO incorporated into polymer matrix shows even better properties than unmodified graphene polyurethanes.…”

Section: Introductionmentioning

confidence: 99%

Thermal and Mechanical Properties of Microporous Polyurethanes Modified with Reduced Graphene Oxide

Strankowski

Włodarczyk

Piszczyk

et al. 2016

International Journal of Polymer Science

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Microporous polyurethanes (MPU) were modified by adding 0.25%-1.25 wt% of reduced graphene oxide (RGO). The materials were prepared without solvent via in situ polymerization. From a technological point of view, it is very important to obtain functional materials by using reacting compounds only. The thermal characteristics of obtained MPU were investigated using TGA, DSC, and DMA techniques. In comparison to nonmodified microporous polyurethane, the thermal stability and mechanical properties of the modified systems have significantly improved. The temperature corresponding to the maximum degradation rate ( max ) for nanocomposites containing 1% and 1.25 wt% of RGO was 51 ∘ C higher than that observed for pure microporous PU system. The increase of tensile strength was also observed for matrix with the addition of 0.5 wt% RGO nanofiller.

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“…Considerable studies have been done to improve the surface modification of Gr nanoplatelets; the methods used have included chemical modification, electrochemical modification, and π–π interactions . The positive effects of surface‐modified Gr on the mechanical properties of nanocomposites have been reported by some authors . Among these techniques, silane coupling agents have gained more attention for their bifunctional structures.…”

Section: Introductionmentioning

confidence: 99%

Reinforcing effects of aminosilane‐functionalized graphene on the tribological and mechanical behaviors of epoxy nanocomposites

Amirbeygi

Khosravi

Tohidlou

2019

J of Applied Polymer Sci

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In this study, aminopropyl trimethoxysilane as an interfacial modifier was introduced on the surface of graphene (Gr) nanoplatelets. The effects of the silane‐modified graphene (SGr) loading (0, 0.05, 0.1, 0.3, and 0.5 wt %) and silane modification on the tensile, compressive, interlaminar shear stress (ILSS), and tribological properties of the epoxy‐based nanocomposites were investigated. Out of these specimens, the highest values of ILSS and compressive strength were related to the 0.3 wt % SGr–epoxy nanocomposite. The addition of SGr enhanced the tensile strength and strain to failure only at low contents (i.e., 0.05 wt %). Also, the tensile and compressive moduli were improved, and the highest values were observed at a 0.5 wt % SGr loading. In addition, decreases of approximately 40 and 68% in the coefficient of friction and wear rate, respectively, were observed at a 0.3 wt % SGr loading. Enhanced tensile, compressive, ILSS, and wear properties in the SGr–epoxy specimens were observed compared to those in the Gr–epoxy specimens. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47410.

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Chemical functionalization of graphene oxide for improving mechanical and thermal properties of polyurethane composites

Cited by 101 publications

References 45 publications

Thermal, Mechanical, and Morphological Properties of DPU/Titanate Nanotubes Nanocomposites

Thermal, Mechanical, and Morphological Properties of DPU/Titanate Nanotubes Nanocomposites

Thermal and Mechanical Properties of Microporous Polyurethanes Modified with Reduced Graphene Oxide

Reinforcing effects of aminosilane‐functionalized graphene on the tribological and mechanical behaviors of epoxy nanocomposites

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