Infrared light actuated shape memory effects in crystalline polyurethane/graphene chemical hybrids

Park, J H; Kim, B K

doi:10.1088/0964-1726/23/2/025038

Cited by 32 publications

(18 citation statements)

References 28 publications

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“…Thakur et al (2013) have demonstrated that castor oil-modified hyperbranched PU and graphene-oxide (without functionalization) can result in a shape recovery of ~99.5% with shape fixity of ~90%. Park et al (2014) have demonstrated that PU and allyl isocyanate modified graphene oxide can also be actuated by infrared absorption, with a resulting shape recovery of 90%.…”

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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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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“…Heating can be applied directly or non-directly. Stimuli such as electrical resistive heating [14], magnetic field [15], infrared and UV heating light [16,17] are examples of non-direct heating. Although there are various actuation methods for activating SMPs, but most of shape memory polymers are only able to be actuated through direct heating [18] and triggering with other stimulus is more complex.…”

Section: Introductionmentioning

confidence: 99%

“…These unique properties of graphene have been used to produce different multi-stimuli responsive SMPs. Infrared light actuated SMPs are a class of these materials and some studies have been done in this regard [17,37,38]. Kashif et al [37] have produced shape memory polyolefin elastomer/modified graphene nanocomposites responding to infrared light with healing properties.…”

Section: Introductionmentioning

confidence: 99%

“…Feng et al [38] have prepared IR actuated shape memory polyurethane with the aid of reduced graphene oxide and carbon nanotube hybrids. Park and Kim [17] have studied on the semi-crystalline poly urethane/graphene shape memory nanocomposite system responding to infrared light. Tang et al [39] have added graphene to polyester/carbon nanofibers composite to improve its capability in responding to various stimuli.…”

Section: Introductionmentioning

confidence: 99%

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Shape memory nanocomposite of poly(L-lactic acid)/graphene nanoplatelets triggered by infrared light and thermal heating

Lashgari¹,

Karrabi²,

Ghasemi³

et al. 2016

Express Polym. Lett.

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Abstract. In this study, the effect of graphene nanoplatelets (GNPs) on the shape memory properties of poly(L-lactic acid) (PLLA) was studied. In addition to thermal activation, the possibility of infrared actuating of thermo-responsive shape memory PLLA/GNPs nanocomposite was investigated. The incorporated GNPs were expected to absorb infrared wave's energy and activate shape memory PLLA/GNPs. Different techniques such as differential scanning calorimetry (DSC), wide-angle X-ray diffraction (WAXD), field emission gun scanning electron microscope (FEG-SEM) and dynamic mechanical thermal analysis (DMTA) were used to characterize samples. DSC and WAXD results indicated that GNPs augmented crystallinity due to nucleating effect of graphene particles. GNPs improved both thermal and infrared activating shape memory properties along with faster response. Pure shape memory PLLA was slightly responsive to infrared light and its infrared actuated shape recovery ratio was 86% which increased to more than 95% with loading of GNPs. Drastic improvement in the crystallinity was obtained in nanocomposites with lower GNPs contents (0.5 and 1 wt%) due to finer dispersion of graphene which resulted in more prominent mechanical and shape memory properties enhancement. Infrared activated shape memory PLLA/GNPs nanocomposites can be developed for wireless remote shape control of smart medical and bio-systems.

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“…The modification of PU with graphene is a way of developing a new generation of materials for a wider spectrum of industrial applications. PU/graphene nanocomposites may display significant improvements in mechanical and thermal properties [29,30], the shape-memory effect [31,32], electromagnetic shielding capabilities [33], and conductivity [34]. Table 1.…”

Section: Introductionmentioning

confidence: 99%

Study of the effect of thermally reduced graphene oxide on the physical and mechanical properties of flexible polyurethane foams

2015

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Flexible polyurethane (PU) foams were obtained from a two-component system via the one-step method. The foams were modified with thermally reduced graphene oxide added in the amount equal to 0.25, 0.5, and 0.75 wt%. The morphology, static and dynamic properties, and thermal stability of modified foams were determined. The application of carbon filler resulted in the visible increase in the cell size, apparent density, and rigidity of the modified systems, as confirmed by the measurements of glass transition temperature. Glass transition temperature increased with increasing content of nanofiller. In addition, thermally reduced graphene oxide had an effect on the thermal stability of the obtained foam systems. The addition of 0.5 wt% of nanofiller resulted in an increase in T 5 by 168C compared with the reference foam. This study also demonstrated that after exceeding a specific content of thermally reduced graphene oxide, that is, 0.5%, the physicochemical properties of the obtained systems start to deteriorate. The research results showed that thermally reduced graphene oxide can be successfully used as a modifier of mechanical and thermal properties in flexible PU foams. POLYM. COMPOS., 00:000-000, 2015.

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Infrared light actuated shape memory effects in crystalline polyurethane/graphene chemical hybrids

Cited by 32 publications

References 28 publications

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

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

Shape memory nanocomposite of poly(L-lactic acid)/graphene nanoplatelets triggered by infrared light and thermal heating

Study of the effect of thermally reduced graphene oxide on the physical and mechanical properties of flexible polyurethane foams

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