Properties and Morphologies of Epoxy Resin Based Composites Reinforced by Polyurethane and Graphene Oxide

High temperature resistant microspheres were prepared via Pickering suspension polymerization. Acrylonitrile (AN), methacrylic acid (MAA) and N,N-dimethylacrylamide (DMAA) were used as monomers, and n-butylacrylate (BA) was used as modified monomer to improve the expansion properties of the microspheres. Morphology of the microspheres was characterized by scanning electron microscopy (SEM) and polarizing optical microscope (POM) respectively. The average diameter of the prepared microspheres was 51.9 μm, and the maximum expansion volume was 4 times of the original volume. The expansion performance and blowing agent content of the microspheres were characterized by thermal mechanical analysis (TMA) and thermogravimetric analysis (TGA) respectively. The onset expansion temperature of the microspheres was 159.5 °C, the maximum expansion temperature was 213.9 °C, and the encapsulation content of the blowing agent was 14.62%. Fourier transform infrared (FTIR) showed that the adjacent chains of AN and MAA form imide ring structure during the thermal expansion process of the microspheres.

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“…Due to the unique properties, TEMs were widely used in various fields, such as printing ink, ceramics, composite materials, etc. [3,4].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of high temperature resistant thermal expansion microsopheres with P(acrylonitrile/methacrylic acid/N,N-dimethylacrylamide/n-butylacrylate) shell

Zhang

Zhou

Huang³

et al. 2019

SN Appl. Sci.

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“…The mechanical properties for neat epoxy and its composites with different filler loadings are summarized in Table 4 . Considering the enhancement effects of MXene [ 15 , 37 , 55 ], graphene [ 56 ] and graphene oxide (GO) [ 46 , 57 , 58 , 59 , 60 ], the enhancement of ATP–MXene hybrids was also comparable, as shown in Table 5 .…”

Section: Resultsmentioning

confidence: 99%

Attapulgite–MXene Hybrids with Ti3C2Tx Lamellae Surface Modified by Attapulgite as a Mechanical Reinforcement for Epoxy Composites

et al. 2021

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As a member of two-dimensional (2D) materials, MXene is an ideal reinforcement phase for modified polymers due to its large number of polar functional groups on the surface. However, it is still relatively difficult to modify any functional groups on the surface of MXene at present, which limits its application in enhancing some polymers. Herein, one-dimensional (1D) attapulgite (ATP) nanomaterials were introduced onto the surface of MXene to form ATP–MXene hybrids, which successfully improved the mechanical properties of the epoxy composites. ATP with appropriate content can increase the surface roughness of the MXene lamellae to obtain better interface interaction. Therefore, remarkable enhancement on the mechanical property was achieved by adding M02A025 (0.2 wt % MXene and 0.25 wt % ATP), which is the optimum composition in the hybrids for composite mechanical properties. Compared to neat epoxy, the tensile strength, flexural strength and critical stress intensity factor (KIC) of M02A025/epoxy are increased by 88%, 57%, and 195%, respectively, showing a high application prospect.

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“…The strong interfacial covalent bonding is favorable to the loading transfer from the polymer matrix to GO, with superior tensile strength (Xia et al, 2015). Furthermore, because of the immense modulus difference between GO and epoxy oxide, GO functions as a stress-concentration point and induces microcracks around it, which consumes additional fracture energy to improve the tensile strength (Chen et al, 2017).…”

Section: Resultsmentioning

confidence: 99%

Graphene Oxide-Modified Microcapsule Self-Healing System for 4D Printing

Zhang

Wei

et al. 2021

Front. Mater.

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Self-healing materials as a type of promising smart materials are gradually applied to electronics, biology, and engineering. In this study, we used in situ polymerization to make melamine-formaldehyde (MF) resin microcapsules to wrap the epoxy oxide as a repairing agent and Cu(MI)4Br2 as a latent-curing agent to protect epoxy oxide E-51 from broken melamine-formaldehyde resin microcapsules. In addition, graphene oxide was used as a reinforcing phase through its two-dimensional-layered structure to increase the tensile strength to 41.91 MPa, which is higher than the initial materials. The melamine-formaldehyde capsules and latent-curing agents were uniformly distributed in the materials according to the digital photos and scanning electron microscope (SEM) pictures. It is worth noting that the mechanical strength of the broken materials can be restored to 35.65 MPa after heating to 130°C for 2 h to repair the damage, and the self-healing efficiency reached up to 85.06%. Furthermore, we also fabricated the 4D printed material with a tensile strength of 50.93 MPa through a 3D printer. The obtained materials showed excellent repair effect, with a recovery rate of up to 87.22%. This study confirms that the designed self-healing system has potential applications in many areas due to its excellent self-healing performance, which provides valuable guidance for designing the 4D system.

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Properties and Morphologies of Epoxy Resin Based Composites Reinforced by Polyurethane and Graphene Oxide

Cited by 14 publications

References 15 publications

Synthesis and characterization of high temperature resistant thermal expansion microsopheres with P(acrylonitrile/methacrylic acid/N,N-dimethylacrylamide/n-butylacrylate) shell

Synthesis and characterization of high temperature resistant thermal expansion microsopheres with P(acrylonitrile/methacrylic acid/N,N-dimethylacrylamide/n-butylacrylate) shell

Attapulgite–MXene Hybrids with Ti3C2Tx Lamellae Surface Modified by Attapulgite as a Mechanical Reinforcement for Epoxy Composites

Graphene Oxide-Modified Microcapsule Self-Healing System for 4D Printing

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