Laponite-graphene oxide hybrid particulate filler enhances mechanical properties of cross-linked epoxy

Chouhan, Devesh Kumar; Kumar, Arvind; Rath, Sangram K.; Kumar, Sanjay; Alegaonkar, P.S.; Harikrishnan, G.; Patro, T. Umasankar

doi:10.1007/s10965-018-1461-2

Cited by 12 publications

(7 citation statements)

References 47 publications

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“…Laponite shows two major peaks at 2 θ ≈6° and ≈20.1°, which correspond to (001) and (110, 020) crystallographic planes of laponite, respectively. The detected reflections are in accordance with those characteristic of Laponite RD . The interlayer d 001 spacing for laponite is 1.4 nm.…”

Section: Resultssupporting

confidence: 80%

The Role of Dispersion Technique and Type of Clay on the Mechanical Properties of Clay/Epoxy Composites

Ceretti

Silva

Gonçalves

et al. 2019

Macromolecular Symposia

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Epoxy composites containing montmorillonite (MMT), laponite (LAP), and halloysite nanotubes (HNT) are prepared using two different dispersion techniques: sonication and high energy ball milling. The mechanical properties of the composite materials are monitored as a function of the type of clay particle/geometry and processing technique. The materials are characterized by X‐ray diffraction, microscopy techniques, parallel plate rheometry, and mechanical testing. Experimental results present clear evidence that sonication has led to better nanoparticle dispersion. The results also indicate that the composites manufactured via sonication exhibited higher ductility.

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Section: Resultssupporting

confidence: 80%

The Role of Dispersion Technique and Type of Clay on the Mechanical Properties of Clay/Epoxy Composites

Ceretti

Silva

Gonçalves

et al. 2019

Macromolecular Symposia

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“… 42 The information of the aggeregation state of the r-GO layers could be obtained from the fractal dimension ( d m ), which is related to the slope of the SAXS curves in the log–log scale at low q . 43 The different d m values are determined by fractal geometry. In this study, the loose structure of the organosilica sample formed a surface fractal.…”

Section: Resultsmentioning

confidence: 99%

Ultrathin Reduced Graphene Oxide/Organosilica Hybrid Membrane for Gas Separation

Zhao

Zhou

Kong

et al. 2021

JACS Au

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Here, reduced graphene oxide (r-GO) nanosheets were embedded in an organosilica network to assemble an ultrathin hybrid membrane on the tubular ceramic substrate. With the organosilica nanocompartments inside the r-GO stacks and the intensified polymerization, r-GO sheets endow the as-prepared hybrid membranes with high H 2 and CO 2 separation performance. The resulting selectivities of H 2 /CH 4 and CO 2 /CH 4 are found to be 223 and 55, respectively, together with gas permeance of approximately 2.5 × 10 –7 mol·m –2 ·s –1 ·Pa –1 for H 2 and 6.1 × 10 –8 mol·m –2 ·s –1 ·Pa –1 for CO 2 at room temperature and 0.2 MPa. To separate larger molecules from H 2 , the H 2 /C 3 H 8 and H 2 / i -C 4 H 10 selectivities are as high as 1775 and 2548, respectively. Moreover, at 150 °C and 0.2 MPa, the hybrid membrane retains high separation performances with ideal selectivities higher than 200 and 30 for H 2 /CH 4 and CO 2 /CH 4 , respectively, which are attractive for gas separation and purification of practical applications.

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“…The graphene oxide with a layered nanostructure also shows the characteristic small peak at 2θ~12°, relating to the diffraction of the (001) plane, and a spacing obtained from Bragg equations as 10.06 Å. The weak intensity of the diffraction peak of (001) for graphene oxide showed the exfoliation of the graphene layers in the structure of the nanocomposite hydrogel, [ 69 ] so that at a lower concentration of 3 mg/mL there is no peak for the (001) plane of the graphene oxide.…”

Section: Resultsmentioning

confidence: 99%

Silicate-Based Electro-Conductive Inks for Printing Soft Electronics and Tissue Engineering

Gharaie

Seyfoori

Jush

et al. 2021

Gels

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Hydrogel-based bio-inks have been extensively used for developing three-dimensional (3D) printed biomaterials for biomedical applications. However, poor mechanical performance and the inability to conduct electricity limit their application as wearable sensors. In this work, we formulate a novel, 3D printable electro-conductive hydrogel consisting of silicate nanosheets (Laponite), graphene oxide, and alginate. The result generated a stretchable, soft, but durable electro-conductive material suitable for utilization as a novel electro-conductive bio-ink for the extrusion printing of different biomedical platforms, including flexible electronics, tissue engineering, and drug delivery. A series of tensile tests were performed on the material, indicating excellent stability under significant stretching and bending without any conductive or mechanical failures. Rheological characterization revealed that the addition of Laponite enhanced the hydrogel’s mechanical properties, including stiffness, shear-thinning, and stretchability. We also illustrate the reproducibility and flexibility of our fabrication process by extrusion printing various patterns with different fiber diameters. Developing an electro-conductive bio-ink with favorable mechanical and electrical properties offers a new platform for advanced tissue engineering.

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Laponite-graphene oxide hybrid particulate filler enhances mechanical properties of cross-linked epoxy

Cited by 12 publications

References 47 publications

The Role of Dispersion Technique and Type of Clay on the Mechanical Properties of Clay/Epoxy Composites

The Role of Dispersion Technique and Type of Clay on the Mechanical Properties of Clay/Epoxy Composites

Ultrathin Reduced Graphene Oxide/Organosilica Hybrid Membrane for Gas Separation

Silicate-Based Electro-Conductive Inks for Printing Soft Electronics and Tissue Engineering

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