Effect of interfacial morphology on electromagnetic shielding performance of poly (<scp>l</scp>‐lactide)/polydimethylsiloxane/multi‐walled carbon nanotube composites with honeycomb like conductive networks

Tang, Yi; Wang, Ye; Huang, Ming‐Lu; Wang, Ming

doi:10.1002/pc.27917

Cited by 11 publications

(1 citation statement)

References 58 publications

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“…Well-dispersed MWCNTs act as nanofillers that carry applied stresses, restricting deformation of the more compliant polymer. The MWCNT-polymer interfacial interactions, such as van der Waals forces and chemical bonding, further promote effective stress transfer and reinforce the composite [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Optimizing mechanical properties of multi-walled carbon nanotube reinforced thermoplastic polyurethane composites for advanced athletic protective gear

2024

Matéria (Rio J.)

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This study investigates the mechanical properties of thermoplastic polyurethane (TPU) composites reinforced with multi-walled carbon nanotubes (MWCNTs) for application in athletic protective gear. The objectives were to (1) systematically evaluate the effects of MWCNT loading level and alignment on the tensile, compressive, hardness, and impact properties; (2) identify an optimal MWCNT content range for balanced enhancements; and (3) explore scalable fabrication methods. MWCNT/TPU composites with 0.5-4 wt% loading were prepared by solution mixing and compression molding. Mechanical testing revealed significant improvements, with 62 MPa tensile strength (+19%), 507 MPa modulus (+23%), and 10% higher impact energy absorption achieved at 1-4 wt% MWCNT. MWCNT alignment further enhanced the properties, while loadings above 2 wt% showed some embrittlement. Microstructural characterization evidenced good MWCNT dispersion and interfacial bonding. The results demonstrate that low MWCNT additions can substantially enhance the strength, stiffness, and impact resistance of TPU. This indicates great potential for developing advanced, lightweight athletic protective equipment like helmets and pads with improved energy absorption and durability. Future work will focus on optimizing composite processing and design for specific gear applications.

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Section: Introductionmentioning

confidence: 99%

Optimizing mechanical properties of multi-walled carbon nanotube reinforced thermoplastic polyurethane composites for advanced athletic protective gear

2024

Matéria (Rio J.)

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Altering the percolation threshold of PA66‐copper hybrid in an electroless copper deposition process by surface activation of the polymer

Gleissner,

Biermaier,

Bechtold

et al. 2024

Polymer Composites

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In this study, the impact of three different principles of surface activation techniques for polyamide fibers on the formation of conductive percolation during the subsequent electroless copper deposition process was investigated. The techniques used are (1) polyamide complexation using a solution mixture of calcium chloride, ethanol and water, (2) atmospheric plasma surface treatment and (3) grafting of 2‐hydroxyethylmethacrylate by radical induced polymerization. As a result, the percolation threshold was shifted to lower copper contents. The copper content required to form conductive structures was reduced ranged between 59% and 89%, depending on the activation techniques. Furthermore, the deposition time was reduced by 37%–57%, resulting in a faster build‐up of the percolation on the fabric. Changes in wetting behavior and substrate surface topography were identified to be the main reasons for these observations. While all applied surface activation techniques led to higher copper contents compared to unmodified reference, the atmospheric plasma modification led to the highest copper contents during the deposition process and a more uniform appearance of the metallised layer.Highlights Three different fiber surface activation methods are evaluated. Fiber surface activation increases wetting and polymer‐metal adhesion. Activated polymer surface leads to faster copper deposition and percolation. Atmospheric plasma modification is the most efficient technique.

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Enhanced mechanical, thermal properties and thermal conductivities of epoxy composites via incorporating graphene oxide‐grafted carbon nanotubes hybrids

Liu,

Zhang,

Fan

et al. 2024

Polymer Composites

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A hetero‐structured hybrid was produced by grafting one‐dimensional (1D) amine‐functionalized multiwalled carbon nanotubes (MWCNTs) onto the basal plane of two‐dimensional (2D) graphene oxide (GO) via an amine‐epoxy ring‐opening reaction, and such hybrid was further applied for reinforcing epoxy composites. Based on this hybrid design, 1D MWCNTs anchored on the 2D GO nanosheets resisted the re‐stacking of GO nanosheets while GO improved the MWCNTs' dispersion state. Attributing to the synergistic effect of GO and MWCNTs, a multi‐dimensional conducting network within epoxy matrix was constructed and efficiently transferred stress and heat between hybrid and matrix. When just 0.5 wt% hybrids were incorporated, the mechanical properties, thermal stability and thermal conductivity of hybrid‐filled epoxy composites were significantly improved, compared with pure epoxies. This work gives a promising method for designing and preparing polymer composites for thermal management and protection applications.Highlights A hetero‐structured hybrid consisting of MWCNTs and GO was obtained. Better dispersion of GO–MWCNTs within matrix was achieved. A multi‐dimensional GO–MWCNTs conducting network in matrix was constructed. Enhanced properties were due to the synergistic effect of GO and MWCNTs. Structural performance of GO and MWCNTs was maximized.

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Effect of interfacial morphology on electromagnetic shielding performance of poly (l‐lactide)/polydimethylsiloxane/multi‐walled carbon nanotube composites with honeycomb like conductive networks

Cited by 11 publications

References 58 publications

Optimizing mechanical properties of multi-walled carbon nanotube reinforced thermoplastic polyurethane composites for advanced athletic protective gear

Optimizing mechanical properties of multi-walled carbon nanotube reinforced thermoplastic polyurethane composites for advanced athletic protective gear

Altering the percolation threshold of PA66‐copper hybrid in an electroless copper deposition process by surface activation of the polymer

Enhanced mechanical, thermal properties and thermal conductivities of epoxy composites via incorporating graphene oxide‐grafted carbon nanotubes hybrids

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