Microbeam two-dimensional small-angle X-ray scattering investigating the effects of reduced graphene oxide on local microstructures of high-density polyethylene/reduced graphene oxide nanocomposite bars

Yao, Guibin; Duan, Tianchen; Chi, Enyi; Guo, Pengran; Li, Yiguo; Wang, Zongbao

doi:10.1098/rsos.181866

Cited by 5 publications

(2 citation statements)

References 42 publications

(57 reference statements)

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“…The 2D plots provides insight about the polymer structure. The isotropic sample typically displays a complete ring, while the oriented sample often displays two or more bright maxima [34,35]. The 2D SAXS signal of all epoxy/OMMT nanocomposites shows a ring pattern, indicating the samples are isotropic with no preffered orientation of the nanostructure within the plane of the samples.…”

Section: Structural and Morphologicalmentioning

confidence: 99%

The Effect of Bi-Functionalized MMT on Morphology, Thermal Stability, Dynamic Mechanical, and Tensile Properties of Epoxy/Organoclay Nanocomposites

Chee

Jawaid

2019

Polymers

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In this work, the optimum filler loading to prepare epoxy/organoclay nanocomposites by the in-situ polymerization method was studied. Bi-functionalized montmorillonite at different filler loading (0.5, 1.0, 2.0, 4.0 wt %) was dispersed in epoxy resin by using a high shear speed homogenizer. The effect on morphology, thermal, dynamic mechanical, and tensile properties of the epoxy/organoclay nanocomposites were studied in this work. Wide-angle X-ray scattering (WAXS) and field emission scanning electron microscope (FESEM) studies revealed that possible intercalated structures were obtained in epoxy/organoclay nanocomposites. Thermogravimetric analysis (TGA) shows that epoxy/organoclay nanocomposites exhibit higher thermal stability at the maximum and final decomposition temperature, as well as higher char content, compared to pristine epoxy. The dynamic mechanical analysis (DMA) indicate that storage modulus (E′), loss modulus (E″), cross-link density and glass transition temperature (Tg) of the nanocomposites were improved with organoclay loading up to 1 wt %. Beyond this loading limit, the deterioration of properties was observed. A similar trend was also observed on tensile strength and modulus. We concluded from this study that organoclay loading up to 1 wt % is suitable for further study to fabricate hybrid nanocomposites for various applications.

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Section: Structural and Morphologicalmentioning

confidence: 99%

The Effect of Bi-Functionalized MMT on Morphology, Thermal Stability, Dynamic Mechanical, and Tensile Properties of Epoxy/Organoclay Nanocomposites

Chee

Jawaid

2019

Polymers

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“…The data analysis was carried out by the Fit2d software package, version V18.002. From the intensity (I(q)) and the scattering vector (q), which were obtained from SAXS profile, the long period (L 0 ) can be evaluated by Equation (2) [19].…”

Section: X-ray Crystallographymentioning

confidence: 99%

Investigation of Degradation Mechanism from Shear Deformation and the Relationship with Mechanical Properties, Lamellar Size, and Morphology of High-Density Polyethylene

et al. 2021

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The degradation of mechanical properties is the most challenging point for the development of plastic mechanical recycling processes. Remelting and shear deformation contained in the mechanical process are a part of degradation in recycled plastics. In this study, virgin high-density polyethylene (HDPE) was simulated to be recycled by remelting and treating with shear deformation being measured at different shear treatment rates (0–100/s) using a cone-plate rheometer. The obtained shear treatment product was remolded as a thin film. The evaluation was performed comparing virgin HDPE (VPE) without any processing with shear-treated HDPE with various shear treatment rates. Tensile property, X-ray crystallography, and morphological observations were performed in order to investigate the relationship between mechanical properties, thickness of lamellar size, and the morphology of shear-treated HDPE as compared to VPE. It can be found that the elongation at break of shear-treated HDPE at a high shear treatment rate (100/s) was significantly decreased from VPE. This degradation mechanism was related to the decreased degree of crystallinity, thickness of the crystalline layer, intermediate layer, and occurrence of crystalline orientation. This study expected to explain the degradation mechanism of HDPE from shear deformation which can be further improved by the processing conditions of the mechanical plastic recycling process.

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A lightweight and high thermal performance graphene heat pipe

Chen

et al. 2020

Nano Select

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Heat pipe is one of the most efficiency tools for heat dissipation in power systems. Currently, heat pipes are usually made of copper or aluminum. However, due to their relatively high density and limited heat transmission capacity, heat pipes are facing urgent challenges in power electronics. In this paper, a new class of graphene enhanced heat pipe that can cope with these issues is reported. The graphene enhanced heat pipe is made of high thermal conductivity graphene assembled film with nanostructure enhanced inner surfaces. The study shows that the dramatically improved heat dissipation capacity, 7230 W m−2 K−1 g−1, about 3.5 times higher than that of copper based commercial heat pipes can be achieved. This paves the way for using graphene enhanced heat pipe in lightweight and large capacity cooling applications, as required in many systems such as automotive electronics, hand‐sets and space electronics.

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Microbeam two-dimensional small-angle X-ray scattering investigating the effects of reduced graphene oxide on local microstructures of high-density polyethylene/reduced graphene oxide nanocomposite bars

Cited by 5 publications

References 42 publications

The Effect of Bi-Functionalized MMT on Morphology, Thermal Stability, Dynamic Mechanical, and Tensile Properties of Epoxy/Organoclay Nanocomposites

The Effect of Bi-Functionalized MMT on Morphology, Thermal Stability, Dynamic Mechanical, and Tensile Properties of Epoxy/Organoclay Nanocomposites

Investigation of Degradation Mechanism from Shear Deformation and the Relationship with Mechanical Properties, Lamellar Size, and Morphology of High-Density Polyethylene

A lightweight and high thermal performance graphene heat pipe

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