Control of the structure and properties of SEBS nanocomposites via chemical modification of graphene with polymer brushes

Enrique-Jiménez, Patricia; Quiles-Díaz, Susana; Salavagione, Horacio J.; Wesner, Daniel; Schönherr, Holger; González-Casablanca, J.; García-Quismondo, Roberto; Martínez, Gerardo; Gómez‐Fatou, Marian A.; Ania, F.; Flores, A.

doi:10.1016/j.eurpolymj.2017.09.047

Cited by 19 publications

(14 citation statements)

References 38 publications

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“…G/SEBS composites showed a decrease in the maximum strain for larger filler contents (i.e., higher than 1 wt.%), decreasing from 450% to 150% for composites with 1 and 5 wt.% of graphene, respectively. This decrease of the deformation capability of the SEBS composites with larger nanofiller contents is typically ascribed to graphene agglomerates [33] (which were not observed in our case), or to graphene interactions with polymeric chains—mainly polystyrene (PS) domains [34]. It has been reported that the distance between nanodomains of styrene and ethylene/butylene increases with increasing graphene content in nanocomposites [34].…”

Section: Resultsmentioning

confidence: 50%

“…This decrease of the deformation capability of the SEBS composites with larger nanofiller contents is typically ascribed to graphene agglomerates [33] (which were not observed in our case), or to graphene interactions with polymeric chains—mainly polystyrene (PS) domains [34]. It has been reported that the distance between nanodomains of styrene and ethylene/butylene increases with increasing graphene content in nanocomposites [34]. When analyzed by small-angle X-ray scattering (SAXS) and atomic force microscopy (AFM), nanocomposites with larger graphene contents showed significant distortions from a hexagonal arrangement [34].…”

Section: Resultsmentioning

confidence: 93%

“…It has been reported that the distance between nanodomains of styrene and ethylene/butylene increases with increasing graphene content in nanocomposites [34]. When analyzed by small-angle X-ray scattering (SAXS) and atomic force microscopy (AFM), nanocomposites with larger graphene contents showed significant distortions from a hexagonal arrangement [34]. The initial modulus of the SEBS and composites with different nanocarbonaceous fillers (Figure 5D) was around 80 MPa for SEBS and was practically constant, independent of the filler content up to 5 wt.%.…”

Section: Resultsmentioning

confidence: 99%

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Carbonaceous Filler Type and Content Dependence of the Physical-Chemical and Electromechanical Properties of Thermoplastic Elastomer Polymer Composites

et al. 2019

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Graphene, carbon nanotubes (CNT), and carbon nanofibers (CNF) are the most studied nanocarbonaceous fillers for polymer-based composite fabrication due to their excellent overall properties. The combination of thermoplastic elastomers with excellent mechanical properties (e.g., styrene-b-(ethylene-co-butylene)-b-styrene (SEBS)) and conductive nanofillers such as those mentioned previously opens the way to the preparation of multifunctional materials for large-strain (up to 10% or even above) sensor applications. This work reports on the influence of different nanofillers (CNT, CNF, and graphene) on the properties of a SEBS matrix. It is shown that the overall properties of the composites depend on filler type and content, with special influence on the electrical properties. CNT/SEBS composites presented a percolation threshold near 1 wt.% filler content, whereas CNF and graphene-based composites showed a percolation threshold above 5 wt.%. Maximum strain remained similar for most filler types and contents, except for the largest filler contents (1 wt.% or more) in graphene (G)/SEBS composites, showing a reduction from 600% for SEBS to 150% for 5G/SEBS. Electromechanical properties of CNT/SEBS composite for strains up to 10% showed a gauge factor (GF) varying from 2 to 2.5 for different applied strains. The electrical conductivity of the G and CNF composites at up to 5 wt.% filler content was not suitable for the development of piezoresistive sensing materials. We performed thermal ageing at 120 °C for 1, 24, and 72 h for SEBS and its composites with 5 wt.% nanofiller content in order to evaluate the stability of the material properties for high-temperature applications. The mechanical, thermal, and chemical properties of SEBS and the composites were identical to those of pristine composites, but the electrical conductivity decreased by near one order of magnitude and the GF decreased to values between 0.5 and 1 in aged CNT/SEBS composites. Thus, the materials can still be used as large-deformation sensors, but the reduction of both electrical and electromechanical response has to be considered.

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Section: Resultsmentioning

confidence: 50%

Section: Resultsmentioning

confidence: 93%

Section: Resultsmentioning

confidence: 99%

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Carbonaceous Filler Type and Content Dependence of the Physical-Chemical and Electromechanical Properties of Thermoplastic Elastomer Polymer Composites

et al. 2019

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“…Thermoplastic elastomers like poly(styrene–ethylene– co –butadiene– b –styrene) (SEBS) is a styrene‐based thermoplastic polymer, which allows properties similar to a vulcanized rubber without the need to go through the vulcanization process . Up to now, the main concentration of researches on SEBS/GE composites is electrical and mechanical properties, electromagnetic interference shielding effectiveness and the fabrication of masterbatch . The common measures, such as the modification or functionalization of GE or SEBS, are generally adopted in these studies.…”

Section: Introductionmentioning

confidence: 99%

Enhanced properties of poly(styrene–b–ethylene–co–butylene–b–styrene) nanocomposites with in situ construction of interconnected graphene network

Jia

Pan

Deng

et al. 2018

J of Applied Polymer Sci

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In this work, such elastomeric nanocomposites were fabricated with graphene (GE) sheets selectively distributing between polymer matrices and forming three-dimensional networks. The solvent evaporation process was first introduced to produce poly(styrene-ethylene-co-butadiene-b-styrene) (SEBS) microspheres and then reduced GE oxide attached to the surface of SEBS microspheres via electrostatic interaction and sonication-assisted reduction. The microstructure of nanocomposites, prepared by compression molding using SEBS/GE microspheres, was investigated using scanning electron microscopy and transmission electron microscopy. The results showed that interconnected GE networks formed in heat-pressing composite and was destroyed after twin-roll mixing. The SEBS/GE nanocomposites showed enhanced electrical, thermal, and mechanical properties. The electrical resistivity of nanocomposites obtained via heat-pressing reached to 1.1 × 10 3 Ω m at a 2.5 wt % (1.07 vol %) content of GE. The thermal and mechanical properties were also characterized. It was found that the initial degradation temperature increased by nearly 40 C and the mechanical properties continued to rise with GE content below 0.5 wt %.

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“…In the last few years, we have focused our investigation on the design of specific synthetic protocols for graphene functionalization, where the chosen chemical modification is designed around the target polymer where graphene is to be incorporated. These approaches have progressed from functionalization with discrete molecules (Salavagione et al, 2009b;Coşkun et al, 2012;Castelaín et al, 2013c), to the covalent bonding of graphene to polymers (Salavagione et al, 2009a;Salavagione and Martínez, 2011;Castelaín et al, 2012) and the functionalization of graphene with short polymer brushes (Castelaín et al, 2013a,b;Salavagione, 2014;Quiles-Diaz et al, 2016;Salavagione et al, 2016;Enrique-Jimenez et al, 2017;Quiles-Díaz et al, 2017). The former method uses simple chemical reactions and can lead to good functionalization levels.…”

Section: The Role Of Chemistry To Modulate the Interphasementioning

confidence: 99%

New Perspectives on Graphene/Polymer Fibers and Fabrics for Smart Textiles: The Relevance of the Polymer/Graphene Interphase

et al. 2018

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The fast-growing interest in smart textiles for wearable electronics or sensors is stimulating considerable activity in the development of functional fibers and fabrics that incorporate graphene, due to its outstanding electrical, mechanical, and thermal properties, among others. This paper provides an overview of the current state-of-the-art of research in this field, and a perspective on the factors decisive to its growth, in particular the polymer-graphene interphase.

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Control of the structure and properties of SEBS nanocomposites via chemical modification of graphene with polymer brushes

Cited by 19 publications

References 38 publications

Carbonaceous Filler Type and Content Dependence of the Physical-Chemical and Electromechanical Properties of Thermoplastic Elastomer Polymer Composites

Carbonaceous Filler Type and Content Dependence of the Physical-Chemical and Electromechanical Properties of Thermoplastic Elastomer Polymer Composites

Enhanced properties of poly(styrene–b–ethylene–co–butylene–b–styrene) nanocomposites with in situ construction of interconnected graphene network

New Perspectives on Graphene/Polymer Fibers and Fabrics for Smart Textiles: The Relevance of the Polymer/Graphene Interphase

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