Remote activation of nanomagnetite reinforced shape memory polymer foam

Vialle, Greg; Prima, Matthew Di; Hocking, Erica G.; Gall, Ken; Garmestani, Hamid; Sanderson, Terry; Arzberger, Steven

doi:10.1088/0964-1726/18/11/115014

Cited by 56 publications

(34 citation statements)

References 22 publications

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“…DiPrima and co-workers performed a comprehensive thermo-mechanical characterization of it as they investigated it for potential use in aerospace applications. [49] The TEMBO DP5.1 foam was also characterized by multiple groups, including Radford and Antonio, [50, 51] Vialle, [52] and DiPrima. [53] …”

Section: Chemical Classes Of Porous Smpsmentioning

confidence: 99%

Porous Shape-Memory Polymers

et al. 2013

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Porous shape memory polymers (SMPs) include foams, scaffolds, meshes, and other polymeric substrates that possess porous three-dimensional macrostructures. Porous SMPs exhibit active structural and volumetric transformations and have driven investigations in fields ranging from biomedical engineering to aerospace engineering to the clothing industry. The present review article examines recent developments in porous SMPs, with focus given to structural and chemical classification, methods of characterization, and applications. We conclude that the current body of literature presents porous SMPs as highly interesting smart materials with potential for industrial use.

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Section: Chemical Classes Of Porous Smpsmentioning

confidence: 99%

Porous Shape-Memory Polymers

et al. 2013

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“…3 SMPs offer a number of advantages such as the controllable transition temperature of shape recovery, high capacity for elastic deformation ͑up to 200%͒, easy processing, low density, low cost, and potential biocompatibility and biodegradability. [1][2][3][4][5] The actuation of shape recovery of SMPs can be triggered by temperature heating, light, 1,3 infrared light heating, 5,6 electrical resistive heating, 7-14 magnetic field heating, [15][16][17] water, 18 and solution. [19][20][21] Extensive research have been done on conductive SMP composites by blending a small amount of conductive fillers such as carbon nanotubes, 7,8 carbon black, 9,10 electromagnetic particles, 10,11 electrically conductive hybrid fibers, 12,13 and continuous conductive carbon fibers.…”

mentioning

confidence: 99%

Synergistic effect of carbon nanofiber and carbon nanopaper on shape memory polymer composite

Liu

Gou

et al. 2010

Applied Physics Letters

103

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The present work studies the synergistic effect of carbon nanofiber (CNF) and carbon nanopaper on the shape recovery of shape memory polymer (SMP) composite. The combination of CNF and carbon nanopaper was used to improve the thermal and electrical conductivities of the SMP composite. The carbon nanopaper was coated on the surface of the SMP composite in order to achieve the actuation by electrical resistive heating. CNFs were blended with the SMP resin to improve the thermal conductivity to facilitate the heat transfer from the nanopaper to the underlying SMP composite to accelerate the electroactive responses.

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“…Narendra Kumar et al -eXPRESS Polymer Letters Vol.6, No.1 (2012) [26][27][28][29][30][31][32][33][34][35][36][37][38][39][40] …”

Section: Recovery By Environmental Heatingmentioning

confidence: 99%

“…Non contact initiation of SME was realized by irradiation with infrared light [29][30][31], applying radio-frequency (RF) [32], or an alternating magnetic field [4,10,[33][34][35][36]. The magnetically triggered SME can be characterized by a specific switching magnetic field strength H sw , which needs to be exceeded to induce the shape change [10].…”

mentioning

confidence: 99%

Shape-memory properties of magnetically active triple-shape nanocomposites based on a grafted polymer network with two crystallizable switching segments

Kumar¹,

Kratz²,

Behl³

et al. 2012

Express Polym. Lett.

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Shape-memory polymers (SMP) and composites thereof belong to the class of actively moving polymers, which have the capability of storing one (dualshape) [1][2][3][4][5][6], two (triple-shape) [7][8][9][10][11][12][13] or multiple (multiple-shape) [14] stable temporary shapes and recover their original or other temporary shapes when exposed to an external stimulus. The field of SMP research has developed rapidly over the last years [6,[15][16][17][18][19][20][21][22][23][24][25] and it has become apparent that these functional polymers are motivating novel applications. Thermo-sensitive SMP contain physical or chemical network-points, which determine their original shape, while each temporary shape is fixed by switching domains associated to a thermal transition temperature T trans , that can be a glass transition (T g ) or a melting transition (T m ) [16,17]. The process for programming of a temporary shape is called 'shapememory creation procedure' (SMCP) and can be realized e.g. by deforming the material to an extension of ! m at T > T trans and cooling to T < T trans while keeping the deformation, which then is fixed temporarily by solidification of the related set of switching domains [26]. The recovery of the original shape is named shape-memory effect (SME), which is typically induced by increasing the environmental temperature (T env ) [3,5,27,28] Abstract. Thermo-sensitive shape-memory polymers (SMP), which are capable of memorizing two or more different shapes, have generated significant research and technological interest. A triple-shape effect (TSE) of SMP can be activated e.g. by increasing the environmental temperature (T env ), whereby two switching temperatures (T sw ) have to be exceeded to enable the subsequent shape changes from shape (A) to shape (B) and finally the original shape (C). In this work, we explored the thermally and magnetically initiated shape-memory properties of triple-shape nanocomposites with various compositions and particle contents using different shape-memory creation procedures (SMCP). The nanocomposites were prepared by the incorporation of magnetite nanoparticles into a multiphase polymer network matrix with grafted polymer network architecture containing crystallizable poly(ethylene glycol) (PEG) side chains and poly(!-caprolactone) (PCL) crosslinks named CLEGC. Excellent triple-shape properties were achieved for nanocomposites with high PEG weight fraction when two-step programming procedures were applied. In contrast, single-step programming resulted in dual-shape properties for all investigated materials as here the temporary shape (A) was predominantly fixed by PCL crystallites.

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Remote activation of nanomagnetite reinforced shape memory polymer foam

Cited by 56 publications

References 22 publications

Porous Shape-Memory Polymers

Porous Shape-Memory Polymers

Synergistic effect of carbon nanofiber and carbon nanopaper on shape memory polymer composite

Shape-memory properties of magnetically active triple-shape nanocomposites based on a grafted polymer network with two crystallizable switching segments

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