Flexible and lightweight microcellular RGO@Pebax composites with synergistic 3D conductive channels and microcracks for piezoresistive sensors

Dong, Diandian; Ma, Jianzhong; Ma, Zhonglei; Chen, Yongmei; Zhang, Hongming; Shao, Liang; Gao, Jinpeng; Wei, Linfeng; Wei, Ajing; Kang, Songlei

doi:10.1016/j.compositesa.2019.05.019

Cited by 63 publications

(39 citation statements)

References 62 publications

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“…[ 7 ] Furthermore, the inherent properties of CPCs make them attractive as a potential alternative to metals in the electronics industry for electromagnetic shielding [ 8–10 ] and sensors. [ 11 ] Carbon‐based materials are lightweight and exhibit excellent mechanical properties and thermal stability, and have broad applications as fillers, including in electrodes for supercapacitors [ 12,13 ] and batteries [ 14,15 ] and environmental protection. [ 16 ] The commonly used conductive fillers in CPCs, such as conductive carbon black, [ 17 ] carbon fibers, [ 18 ] carbon nanotubes, [ 8,19 ] graphene, [ 20,21 ] and noble metal nanowires, [ 22,23 ] benefit from their light weight, high specific surface area, and high conductivity.…”

Section: Introductionmentioning

confidence: 99%

“…The carbon‐based filler is coated on the surface of each bead, and small quantities of carbon‐based filler can be coated evenly on the bead surfaces. In the molding process, common steam molding [ 11,69 ] was not carried out because it has a high operating cost and significantly deteriorates the physical and mechanical properties of the molded material. Even though the modified steam molding reduces the operating cost, the overall properties of the molded material are consistent with those molded by traditional steam molding.…”

Section: Introductionmentioning

confidence: 99%

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Microcellular Conductive Carbon Black or Graphene/PVDF Composite Foam with 3D Conductive Channel: A Promising Lightweight, Heat‐Insulating, and EMI‐Shielding Material

Jia

Phule

Geng

et al. 2021

Macro Materials & Eng

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In this study, a lightweight microcellular carbon‐based filler/poly(vinylidene fluoride) (PVDF) composite foam is fabricated with a 3D conductive network that is thermally insulating, electrically conductive, and fabricated on a large scale. This composite can be used for high‐efficiency thermal insulation and electromagnetic interference (EMI) shielding applications. The prepared composite demonstrates low density, high electrical conductivity, and excellent thermal insulation properties. The structure and density of the conductive network and the carbon‐based filler content has a significant influence on the electrical conductivity of the prepared composite foam. Although the composite comprises microcellular PVDF beads of the same density, the conductivity of the composite‐comprising strip beads is greater than that comprising spherical beads. In the same conductive network structure, as the size of the microcellular PVDF beads decrease, the conductive network becomes denser, which results in a higher conductivity. Furthermore, with an increase in the conductive filler content, the conductivity improves significantly. Excellent EMI shielding materials with optimal filler content and particle shapes, exhibiting EMI shielding effectiveness of up to 40–50 dB, are developed. The prepared composite foam possesses excellent application potential in the fields of ultra‐light thermal insulation, conductivity, and EMI shielding.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microcellular Conductive Carbon Black or Graphene/PVDF Composite Foam with 3D Conductive Channel: A Promising Lightweight, Heat‐Insulating, and EMI‐Shielding Material

Jia

Phule

Geng

et al. 2021

Macro Materials & Eng

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“…Poly(ether‐block‐amide) (PEBA), that is, a block polymer, consists of polyether soft segments and polyamide hard segments to form a microphase separation morphology, meanwhile shows outstanding flexibility, elasticity, and outstanding elastic performance at minus tens of zero temperature. [ 24–27 ] Especially, PEBA has a unique amphiphilic property which endows itself potential anti‐fouling applications. [ 27 ] Compared to the common procedure to realize the anti‐fouling ability, such as adding hydrophilic fillers, chemical modification, and blending with hydrophilic polymers, [ 28,29 ] using an amphiphilic polymeric material avoid the migration of fillers and the following deterioration of anti‐fouling performance.…”

Section: Introductionmentioning

confidence: 99%

Facile Fabrication of Amphiphilic and Asymmetric Films with Excellent Deformability for Efficient and Stable Adsorption Applications

Wang

Zhao

2021

Macro Materials & Eng

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In this study, a facile way to prepare amphiphilic and asymmetric films with excellent mechanical properties for efficient and stable adsorption applications is reported. Non‐solvent induced phase separation technology is developed to fabricate porous asymmetric poly(ether‐block‐amide) composite films. These films have a unique structure composed of a solid surface, a microporous surface, and hierarchical porous core, hence exhibiting prominent mechanical properties with an elongation at break up to 317% and mechanical resilience. Before and after 50‐times cyclic stretching deformations, they still maintain intact porous structure, and their wetting angles of upper and lower surfaces to both water and cyclohexane are almost constant. Moreover, these films show excellent uptake for cyclohexane and water, and cyclic large deformations have little influence on the performance. It only takes 3 s to absorb 4 times of the weight of cyclohexane, while 1.8 times of water can be loaded within 134 s.

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“…In recent years, porous materials have been widely used in superhydrophobic materials, adsorption materials, electronics, and other fields owing to their porous, loose, and flexible characteristics [1][2][3]. Conductive porous materials have unique porous structure and demonstrate excellent electrical conductivity, enabling them to have a broad prospective application in various fields such as flexible sensing, electrochemistry, and supercapacitors [4][5][6]. However, conductive porous materials have their own limitations such as uneven pore size distribution and weak adhesion between the filler and pore structure.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional Graphene-Based Composite Sponge

Tian

et al. 2020

Sensors

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Although graphene has been widely used as a nano-filler to enhance the conductivity of porous materials, it is still an unsatisfactory requirement to prepare graphene-based sponge porous materials by simple and low-cost methods to enhance their mechanical properties and make them have good sensing and capacitive properties. Graphene platelets (GnPs) were prepared by the thermal expansion method. Graphene-based sponge porous materials were prepared by a simple method. A flexible sensor was formed and supercapacitors were assembled. Compared with other graphene-based composites, the graphene-based composite sponge has good electrical response under bending and torsion loading. Under 180° bending and torsion loading, the maximum resistance change rate can reach 13.9% and 52.5%, respectively. The linearity under tension is 0.01. The mechanical properties and capacitance properties of the sponge nanocomposites were optimized when the filler fraction was 1.43 wt.%. The tensile strength was 0.236 MPa and capacitance was 21.4 F/g. In cycles, the capacitance retention rate is 94.45%. The experimental results show that the graphene-based sponge porous material can be used as a multifunctional flexible sensor and supercapacitor, and it is a promising and multifunctional porous nanocomposite material.

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Flexible and lightweight microcellular RGO@Pebax composites with synergistic 3D conductive channels and microcracks for piezoresistive sensors

Cited by 63 publications

References 62 publications

Microcellular Conductive Carbon Black or Graphene/PVDF Composite Foam with 3D Conductive Channel: A Promising Lightweight, Heat‐Insulating, and EMI‐Shielding Material

Microcellular Conductive Carbon Black or Graphene/PVDF Composite Foam with 3D Conductive Channel: A Promising Lightweight, Heat‐Insulating, and EMI‐Shielding Material

Facile Fabrication of Amphiphilic and Asymmetric Films with Excellent Deformability for Efficient and Stable Adsorption Applications

Multifunctional Graphene-Based Composite Sponge

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