Electro-Responsive Polystyrene Shape Memory Polymer Nanocomposites

Xu, Ben Bin; Zhang, Lei; Pei, Yu; Luo, Jingyun; Tao, Shanwen; Hosson, J.Th.M. De; Fu, Yong Qing

doi:10.1166/nnl.2012.1393

Cited by 26 publications

(19 citation statements)

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“…The specific properties of CB open the possibility of achieving both viscosity reduction and mechanical enhancement of the matrix in comparison with other nano‐fillers such as carbon nanotubes or graphene. It is well‐known that the high aspect ratio of these later usually increases the melt viscosity causing significant slower production rates and higher processing costs …”

Section: Introductionmentioning

confidence: 99%

Nano‐indentation for probing mechanical properties of nanocomposites based on ethylene butyl acrylate copolymer and carbon black

Bentoumi¹,

Mdarhri

Montagne

et al. 2019

J of Applied Polymer Sci

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Mechanical properties of heterogeneous systems based on carbon black (CB) filled semi-crystalline ethylene butyl acrylate (EBA) copolymer nanocomposites are characterized using nano-indentation technique. The size effect and CB content dependence on the deformation behavior at room temperature were investigated. The phenomenology for hardness response (H) indicates a typical enhancement of the H when the indentation depth (h) decreases as for the usual elastomeric materials. All H-h curves, fitted according to the Meyer's empirical power law and Franck elasticity model, highlight the so-called length-scale-dependent deformation. Similar trend is observed for the elastic modulus. Furthermore, it is evidenced that the increases of CB content increases the mechanical properties of composites, that is, hardness and elastic modulus. This behavior can be mainly related, on the one hand, to the change of the meso-structure, formed by the interconnected network of polymer and the aggregates of CB particles and to the nature of the polymer matrix, on the other hand. The mechanical properties characterized from micro and submicron indentations were compared to that characterized at macroscopic scale to highlight the possible correlations between the two scales. This investigation can interest many applications of polymer composites for rubber technology such as tires industry, soft robotic, and adhesives.

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Section: Introductionmentioning

confidence: 99%

Nano‐indentation for probing mechanical properties of nanocomposites based on ethylene butyl acrylate copolymer and carbon black

Bentoumi¹,

Mdarhri

Montagne

et al. 2019

J of Applied Polymer Sci

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“…However, only a few studies are available for the nanoindentation research on the SMP nanocomposites. [26][27] As a further exploration of our previous studies on the thermal-mechanical properties and shape memory performance of nanocomposites reinforced by spherical particles, [27][28] this study is focused on the micro-mechanics and strengthening mechanism of polystyrene (PS) based CNF/MWCNT nanocomposites. Scanning electron microscope (SEM) was used to identify the micro-structures of CNF/MWCNT nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

Micro-mechanics of nanostructured carbon/shape memory polymer hybrid thin film

Lei

Pei

et al. 2016

Soft Matter

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This paper investigates the mechanics of hybrid shape memory polymer polystrene (PS) based nanocomposites with skeletal structures of CNFs/MWCNTs formed inside. Experimental results showed an increase of glass transition temperature (Tg) with CNF/MWCNT concentrations instead of a decrease of Tg in nanocomposites filled by spherical particles, and an increase in mechanical properties on both macro- and μm-scales. Compared with CNFs, MWCNTs showed a better mechanical enhancement for PS nanocomposites due to their uniform distribution in the nanocomposites. In nanoindentation tests using the Berkovich tips, indentation size effects and pile-up effects appeared obviously for the nanocomposites, but not for pure PS. Experimental results revealed the enhancement mechanisms of CNFs/MWCNTs related to the secondary structures formed by nanofillers, including two aspects, i.e., filler-polymer interfacial connections and geometrical factors of nanofillers. The filler-polymer interfacial connections were strongly dependent on temperature, thus leading to the opposite changing trend of loss tangent with nanofiller concentrations, respectively, at low and high temperature. The geometrical factors of nanofillers were related to testing scales, further leading to the appearance of pile-up effects for nanocomposites in the nanoindentation tests, in which the size of indents was close to the size of the nanofiller skeleton.

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“…However, in 2012 Fu et al showed that Joule heating of a CNT nanocomposite in a polystyrene matrix was able to achieve a shape change while imparting electro-active properties to the SMP [131]. The electrical properties were shown to be strongly dependent on CNT concentration, testing frequency, and temperature.…”

Section: Electro-active Systemsmentioning

confidence: 99%

Shape Memory Polymer–Inorganic Hybrid Nanocomposites

Reit

Lund

Voit

2014

Organic-Inorganic Hybrid Nanomaterials

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Shape memory polymers (SMPs) have been the focus of much research over the last few decades. From the novelty of temporarily fixing a threedimensional shape from a planar polymer sheet, to the uses that SMPs are seeing today as softening biomedical implants and self-deploying hinges, this class of smart materials has successfully been used to tackle a variety of biological, electrical, and mechanical problems. However, the properties of these networks are limited by the organic nature of the SMPs. To enhance their properties, researchers across the globe have looked into imparting the desirable properties of inorganic composite materials to these polymer networks. As the field of shape memory polymer composites began to grow, researchers quantified the unique enhancements that came at varying filler loading levels as a result of controlled material interface interactions. Specifically, the incorporation of nanofillers of various shapes and sizes leads to increased internal interfacial area relative to micro-and macrocomposites at identical loading fractions and imparts interesting mechanical, optical, electrical, thermal, and magnetic properties to these emerging nanocomposites. This new class of material, referred to in this review as shape memory polymer-inorganic nanocomposites (SMPINCs), allows a host of new interactions between the smart polymer and its surrounding environment as a result of the ability to control the internal environment of the polymer network and nanofiller. In this work, the reader is introduced to both the methods of preparing these composites and the effects the fillers have on the biological, electromagnetic, and mechanical properties of the resulting composite.

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Electro-Responsive Polystyrene Shape Memory Polymer Nanocomposites

Cited by 26 publications

References 0 publications

Nano‐indentation for probing mechanical properties of nanocomposites based on ethylene butyl acrylate copolymer and carbon black

Nano‐indentation for probing mechanical properties of nanocomposites based on ethylene butyl acrylate copolymer and carbon black

Micro-mechanics of nanostructured carbon/shape memory polymer hybrid thin film

Shape Memory Polymer–Inorganic Hybrid Nanocomposites

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