Study on 3-D High Conductive Graphene Buckypaper for Electrical Actuation of Shape Memory Polymer

Lu, Haibao; Gou, Jihua

doi:10.1166/nnl.2012.1455

Cited by 39 publications

(36 citation statements)

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“…The electrical resistivity of tested samples is increased with an increase in the weight concentration of GO. It is expected that the more GO being assembled and invloved, the amplitude of electric current and current carrying capability both decrease due to the nature structure of reduced GO, of which the electrical conductivity in its thickness direction is smaller than that in the basal plane [51]. Although the electrically conducting properties of Ag nanoparticle-decorated GO is not as good as that of carbon fiber, resulting in the electrical resistivity increased with an increase of weight content of Ag nanoparticle-decorated GO.…”

Section: Electrical Resistivity Measurementmentioning

confidence: 99%

Synergistic effect of Ag nanoparticle-decorated graphene oxide and carbon fiber on electrical actuation of polymeric shape memory nanocomposites

Liang

Gou

et al. 2014

Smart Mater. Struct.

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This study reports an effective approach of significantly improving electrical properties and recovery performance of shape memory polymer (SMP) nanocomposite, of which its shape recovery was triggered by electrically resistive Joule heating. Reduced graphene oxide (GOs) self-assembled and grafted onto carbon fiber, were used to enhance the interfacial bonding with the SMP matrix via van der Waals force and covalent bond, respectively. A layer of Ag nanoparticles was synthesized from Ag+ solution and chemically deposited onto GO assemblies. These Ag nanoparticles were expected to bridge the gap between GO and improve the electrical conductivity. The experimental results reveal that the electrical conductivity of the SMP nanocomposite was significantly improved via the synergistic effect between Ag nanoparticle-decorated GO and carbon fiber. Finally, the electrically induced shape memory effect of the SMP nanocomposite was achieved, and the temperature distribution in the SMP nanocomposites was recorded and monitored. An effective approach was demonstrated to produce the electro-activated SMP nanocomposites and the resistive Joule heating was viable at a low electrical voltage below 10 V.

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Section: Electrical Resistivity Measurementmentioning

confidence: 99%

Synergistic effect of Ag nanoparticle-decorated graphene oxide and carbon fiber on electrical actuation of polymeric shape memory nanocomposites

Liang

Gou

et al. 2014

Smart Mater. Struct.

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“…That is, heat is generated in the CB/SMPU composites by the electrical current under electrical field, and the deformed shape recovers to its original shape when the temperature is higher than the recovery temperature of CB/SMPU composites. In this CB/SMPU composite with 10 wt% CB content, their T m is only about 43 C, and the resistivity is below 2.3 3 10 4 X cm 21 . Thus, the deformed strain is recovered very quickly under 100 V voltage.…”

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confidence: 87%

“…Indium and zinc standards were used for calibration. First, samples were heated up from 260 to 200 C at a heating rate of 10 C min 21 and kept at 200 C for 1 min, subsequently, cooled to 260 C at a cooling rate of 10 C min 21 , and the second heating scan from 260 to 250 C was performed again. Both surface resistivity and volume resistivity were measured at room temperature by a high resistance measuring device (GEST-121, Beijing, China).…”

Section: Characterizationmentioning

confidence: 99%

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Electroactive two‐way shape memory polymer laminates

Chen

Yang

et al. 2014

Polymer Composites

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Two‐way shape changing polymers are attractive in recent years. In this short communication, carbon black (CB)/shape memory polyurethane (SMPU)‐elastic polyurethane (EPU) laminated composite is prepared and electro‐active two‐way shape changing behavior is reported for the first time. First, the CB/SMPU composite demonstrates good electro‐active shape recovery due to good electricity conduction. When the CB/SMPU composite film is elongated and form polymer laminates by combining with EPU substrate, the resulted CB/SMPU‐EPU polymer laminate shows electro‐active two‐way shape changing behavior, e.g., bending by applying electric current, and reverse bending upon cooling without electric current. POLYM. COMPOS. 36:439–444, 2015. © 2014 Society of Plastics Engineers

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“…shape memory effect (SME)] (Mather et al, 2009;Xie, 2011;Sun et al, 2012). SMPs could be manipulated and ÒfixedÓ to a temporary shape under specific conditions of temperature and stress, and subsequently relax to the permanent state upon application of external stimuli, such as heat, light, magnetic field, or electrically resistive heating (Lendlein and Langer, 2002;Meng and Hu 2009;Liu et al, 2009;Lu and Gou 2012;Hu et al, 2012;Zhao et al, 2012;Lu et al, 2013;Lu et al, 2014a). The mechanism behind shape memory capability lies in their molecular network structure, which contains at least two separate phases or domains (Rousseau 2008;Nguyen et al, 2008;Xie 2010;Huang et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Temperature sensing and actuating capabilities of polymeric shape memory composite containing thermochromic particles

Yao

Lin

2015

Pigment &Amp; Resin Technology

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Purpose -The study reported here intended to create and to study multifunctional shape memory polymer (SMP) composite having temperature sensing and actuating capabilities by embedding thermochromic particles within the polymer matrix.Design/methodology/approach -The multifunctional materials were fabricated following a process consisting of blending (of the thermochromic particles and the SMP at various ratios), mixing, degasing, moulding and thermal curing, thus incorporating thermochromic particles within the polymer. The effect of the thermochromic particles on the thermomechanical properties and thermally responsive shape memory effect (SME) of the resulting multifunction SMP composites were characterised and interpreted.Findings -It was found that exposure of the composites to temperatures above 70°C led to a pronounced, reproducibly reversible change of their colour that was recorded by the thermal and electrical actuation approaches. It was also found that the colour of the composites was independent of the mechanical state of the SMP. Such effects enabled monitoring of the onset of the set/release temperature of the SMP matrix. Furthermore, the combination of thermochromic additive and the SMP resulted in significantly improved thermomechanical strength, absorption of infrared radiation and temperature distribution of the SMP composites.1 Corresponding author, e-mail: yaoyt@hit.edu.cnResearch implications -The temperature sensing and actuating capabilities of the polymeric shape memory composites developed through this study will help to extend the field of potential applications of such composites to fields including sensors, actuators, security labels and information dissemination, where colour indication is an advantageous feature.Originality/value -The shape memory polymer (SMP) composites capable of temperature sensing and actuating are novel.

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Study on 3-D High Conductive Graphene Buckypaper for Electrical Actuation of Shape Memory Polymer

Cited by 39 publications

References 0 publications

Synergistic effect of Ag nanoparticle-decorated graphene oxide and carbon fiber on electrical actuation of polymeric shape memory nanocomposites

Synergistic effect of Ag nanoparticle-decorated graphene oxide and carbon fiber on electrical actuation of polymeric shape memory nanocomposites

Electroactive two‐way shape memory polymer laminates

Temperature sensing and actuating capabilities of polymeric shape memory composite containing thermochromic particles

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