Synthesis and properties of shape memory graphene oxide/polyurethane chemical hybrids

Lee, Su Kyeong; Kim, Byung Kyu

doi:10.1002/pi.4617

Cited by 14 publications

(9 citation statements)

References 25 publications

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“…Whilst according to Chiappone et al [20] who employed SLA-based printing technique to 3D print GO/PEGDA nanocomposite, the higher loadings of GO ( > 0.5 phr) result in decrease of mechanical properties, due to a negative influence on the photocuring kinetics. The general trend observeddecrease in tensile strength and elongation at break with an increase in GO concentration, can be explained by the fact that at higher GO concentrations, the nanosheets tend to aggregate, which decreases cross-link sites and disrupt the polymer chain orientations at high strain values [22]. From the mechanical test (Fig.…”

Section: Resultsmentioning

confidence: 87%

GO-modified flexible polymer nanocomposites fabricated via 3D stereolithography

Tsang

Zhakeyev

Leung

et al. 2019

Front. Chem. Sci. Eng.

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Graphene oxide (GO) induced enhancement of elastomer properties showed a great deal of potential in recent years, but it is still limited by the barrier of the complicated synthesis processes. Stereolithography (SLA), used in fabrication of thermosets and very recently in "flexible" polymers with elastomeric properties, presents itself as simple and user-friendly method for integration of GO into elastomers. In this work, it was first time demonstrated that GO loadings can be incorporated into commercial flexible photopolymer resins to successfully fabricate GO/elastomer nanocomposites via readily accessible, consumer-oriented SLA printer. The material properties of the resulting polymer was characterized and tested. The mechanical strength, stiffness, and the elongation of the resulting polymer decreased with the addition of GO. The thermal properties were also adversely affected upon the increase in the GO content based on differential scanning calorimetry and thermogravimetric analysis results. It was proposed that the GO agglomerates within the 3D printed composites, can result in significant change in both mechanical and thermal properties of the resulting nanocomposites. This study demonstrated the possibility for the development of the GO/elastomer nanocomposites after the optimization of the GO/"flexible" photoreactive resin formulation for SLA with suitable annealing process of the composite in future.

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Section: Resultsmentioning

confidence: 87%

GO-modified flexible polymer nanocomposites fabricated via 3D stereolithography

Tsang

Zhakeyev

Leung

et al. 2019

Front. Chem. Sci. Eng.

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“…1 –5 Potential applications have also opened for biomedical devices using biocompatible polymers, such as polyurethane (PU) and space materials with enhanced mechanical performance. 6 –9 Among the many SMPs, shape-memory polyurethane (SMPU) has found the broadest applications because of their ample degree of freedom in property design.…”

Section: Introductionmentioning

confidence: 99%

“…Chemically modified graphite oxide can be incorporated into a polymer by covalent bonding, where graphene is expected to act as a multifunctional cross-linker as well as conventional reinforcing filler. 9,16,17 As a multifunctional cross-linker, it would augment the rubber elasticity and strain recovery, as well as reduce the cyclic hysteresis, which are important properties for shape-memory (SM) materials. 9…”

Section: Introductionmentioning

confidence: 99%

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Triple shape-memory effect by silanized polyurethane/silane-functionalized graphene oxide nanocomposites bilayer

Kim

2015

High Performance Polymers

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Graphene oxide (GO) was chemically modified with 3-aminopropyltriethoxysilane (APTES) (f-GO) and incorporated into silanized polyurethanes of two different molecular weights and chemical compositions by sol–gel reactions, and the effects were studied in terms of mechanical, dynamic mechanical, and dual and triple shape-memory polymers (DSMP and TSMP, respectively) of the nanocomposite films. It was found that the f-GO nanoparticles act as multifunctional cross-links as well as reinforcing fillers and significantly augmented the glassy and rubbery state moduli, yield strength, break strength, glass transition temperature, and dual shape-memory properties. A cohesive bilayer of the two films (lower layer and upper layer) fabricated by the interpenetrating polymer network technique exhibited synergistic mechanical properties in the glassy and rubbery states along with two undisturbed glass transitions by which an intermediate plateau region and TSMP were demonstrated.

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“…Polyurethane (PU) is the most attractive SMP material, commonly referred to as SMP polyurethane (SMPU) (Lee et al, 2014). Based on the specific molecular design, SMPU can form either a crystalline or amorphous structure, with a broad actuation temperature range from −20 to 150°C .…”

Section: Graphene In Shape Memory Materialsmentioning

confidence: 99%

Recent Progress in the Growth and Applications of Graphene as a Smart Material: A Review

et al. 2015

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Innovative breakthroughs in fundamental research and industrial applications of graphene material have made its mass and low-cost production as a necessary step toward its real world applications. This one-atom thick crystal of carbon, gathers a set of unique physico-chemical properties, ranging from its extreme mechanical behavior to its exceptional electrical and thermal conductivities, which are making graphene as a serious alternative to replace many conventional materials for various applications. In this review paper, we highlight the most important experimental results on the synthesis of graphene material, its emerging properties with reference to its smart applications. We discuss the possibility to successfully integrating graphene directly into device, enabling thereby the realization of a wide range of applications, including actuation, photovoltaic, thermoelectricity, shape memory, self-healing, electrorheology, and space missions. The future outlook of graphene is also considered and discussed.

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Synthesis and properties of shape memory graphene oxide/polyurethane chemical hybrids

Cited by 14 publications

References 25 publications

GO-modified flexible polymer nanocomposites fabricated via 3D stereolithography

GO-modified flexible polymer nanocomposites fabricated via 3D stereolithography

Triple shape-memory effect by silanized polyurethane/silane-functionalized graphene oxide nanocomposites bilayer

Recent Progress in the Growth and Applications of Graphene as a Smart Material: A Review

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